TOSHIBA MMU-AP0272H (01) PDF MANUAL

TOSHIBA MMU-AP0272H (01) PDF SUMMARY:

Check earth wires.

Before troubleshooting or repair work, check that the earth wire is connected to the earth terminals of the main unit, otherwise an electric shock may occur if a leak occurs. If the earth wire is not correctly connected, contact an electric engineer for rework.

Prohibition of modification.

Do not modify the products. Do not also disassemble or modify the parts. It may cause a fire, electric shock, or injury.

Use specified parts.

For spare parts, use those specified. If unspecified parts are used, a fire or electric shock may be caused.

Do not bring a child close to the equipment.

Before troubleshooting or repair work, do not bring a third party (a child, etc.) except the repair engineers close to the equipment. It causes an injury with tools or disassembled parts. Please inform the users so that the third party (a child, etc.) does not approach the equipment.

Insulating measures

Connect the cut-off lead cables with crimp contact, etc, put the closed-end side upward and then apply a water-cut method, otherwise, a leak or production of fire is caused at the users’ side.

No fire

When repairing the refrigerating cycle, take the following measures.

• Be attentive to fire around the cycle. When using a gas stove, etc, be sure to put out fire before work; otherwise, the oil mixed with refrigerant gas may catch fire.
• Do not use a welder in the closed room. When using it without ventilation, carbon monoxide poisoning may be caused.
• Do not bring inflammables close to the refrigerant cycle, otherwise, fire of the welder may catch the inflammables.

Refrigerant

Check the used refrigerant name and use tools and materials of the parts which match with it. For the products which use R410A refrigerant, the refrigerant name is indicated at a position on the outdoor unit where is easy to see. To prevent miss-charging, the route of the service port is changed from one of the former R22.

For an air conditioner which uses R410A, never use other refrigerants than R410A. For an air conditioner which uses other refrigerant (R22, etc.), never use R410A.

If different types of refrigerant are mixed, abnormal high pressure generates in the refrigerating cycle and an injury due to breakage may be caused.

Do not charge refrigerant additionally.

If charging refrigerant additionally when refrigerant gas leaks, the refrigerant composition in the refrigerating cycle changes resulting in a change of air conditioner characteristics or refrigerant over the specified standard amount is charged and an abnormal high pressure is applied to the inside of the refrigerating cycle resulting in the cause of breakage or injury. Therefore if the refrigerant gas leaks, recover the refrigerant in the air conditioner, execute vacuuming, and then newly recharge the specified amount of liquid refrigerant. In this time, never charge the refrigerant over the specified amount.

When recharging the refrigerant in the refrigerating cycle, do not mix the refrigerant or air other than R410A into the specified refrigerant.

If air or others is mixed with the refrigerant, abnormal high pressure generates in the refrigerating cycle resulting in the cause of injury due to breakage.

After installation work, check the refrigerant gas does not leak.

If the refrigerant gas leaks in the room, poisonous gas generates when gas touches fire such as a fan heater, stove or cooking stove though the refrigerant gas itself is innocuous.

Never recover the refrigerant into the outdoor unit.

When the equipment is moved or repaired, be sure to recover the refrigerant with a recovering device. The refrigerant cannot be recovered in the outdoor unit; otherwise, a serious accident such as breakage or injury is caused.

Assembly/Cabling

After repair work, surely assemble the disassembled parts, and connect and lead the removed cables as before. Perform the work so that the cabinet or panel does not catch the inner cables. If incorrect assembly or incorrect cable connection was done, a disaster such as a leak or fire is caused at the user’s side.

Insulator check

After the work has finished, be sure to use an insulation tester set (500V megger) to check the resistance is 2MW or more between the charge section and the non-charge metal section (Earth position). If the resistance value is low, a disaster such as a leak or electric shock is caused at the user’s side.

Ventilation

When the refrigerant gas leaks during work, execute ventilation. If the refrigerant gas touches fire, poisonous gas generates. A case of leakage of the refrigerant and the closed room full with gas is dangerous because a shortage of oxygen occurs. Be sure to execute ventilation.

Be attentive to electric shock

When checking the circuit inevitably under the condition of the power-ON, use rubber gloves and others not to touch the charging section. If touching to the charging section, an electric shock may be caused.

Compulsion

When the refrigerant gas leaks, find up the leaked position and repair it surely. If the leaked position cannot be found up and the repair work is interrupted, pump-down and tighten the service valve, otherwise the refrigerant gas may leak into the room. The poisonous gas generates when gas touches fire such as a fan heater, stove or cooking stove though the refrigerant gas itself is innocuous.

Check after repair

When installing equipment that includes a large amount of charged refrigerant such as a multi air conditioner in a sub-room, it is necessary that the density does not exceed the limit even if the refrigerant leaks. If the refrigerant leaks and exceeds the limit density, an accident of shortage of oxygen is caused. For the installation/moving/reinstallation work, follow the Installation Manual. If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric shock, or fire is caused.

Check after reinstallation

After repair work has finished, check there is no trouble. If a check is not executed, a fire, electric shock, or injury may be caused. For a check, turn off the power breaker. After repair work (installation of the front panel and cabinet) has finished, execute a test run to check there is no generation of smoke or abnormal sound. If a check is not executed, a fire or an electric shock is caused. Before the test run, install the front panel and cabinet.

Check the following items after reinstallation.

• The earth wire is correctly connected.
• The power cord is not caught in the product.
• There is no inclination or unsteadiness and the installation is stable. If the check is not executed, a fire, an electric shock, or an injury is caused.

Put on gloves

Be sure to put on gloves and a long-sleeved shirt during repair work. If not putting on gloves, an injury may be caused with the parts, etc.

Cooling check

When the power was turned on, start to work after the equipment has been sufficiently cooled. As the temperature of the compressor pipes and others became high due to cooling/heating operation, a burn may be caused.

Safety Caution Concerned to New Refrigerant

The pressure of R410A is high 1.6 times that of the former refrigerant (R22). Accompanied with change of refrigerant, the refrigerating oil has been also changed. Therefore, be sure that water, dust, the former refrigerant or the former refrigerating oil is not mixed into the refrigerating cycle of the air conditioner with the new refrigerant during installation work or service work. If incorrect work or incorrect service is performed, there is a possibility to cause a serious accident. Use the tools and materials exclusive to R410A to purpose a safe work.

Cautions on Installation/Service

• Do not mix the other refrigerant or refrigerating oil. For the tools exclusive to R410A, shapes of all the joints including the service port differ from those of the former refrigerant in order to prevent mixture of them.
• As the use pressure of the new refrigerant is high, use material thickness of the pipe and tools which are specified for R410A.
• In the installation time, use clean pipe materials and work with great attention so that water and others do not mix in because pipes are affected by impurities such as water, oxide scales, oil, etc. Use the clean pipes. Be sure to brazing with flowing nitrogen gas. (Never use gas other than nitrogen gas.)
• For the earth protection, use a vacuum pump for air purge.
• R410A refrigerant is azeotropic mixture type refrigerant. Therefore use liquid type to charge the refrigerant. (If using gas for charging, the composition of the refrigerant changes and then the characteristics of the air conditioner change.)

Pipe Materials

For the refrigerant pipes, copper pipe and joints are mainly used. It is necessary to select the most appropriate pipes to conform to the standard. Use clean material in which impurities adhere inside of the pipe or joint to a minimum.

Copper pipe

<Piping>

The pipe thickness, flare finishing size, flare nut and others differ according to a refrigerant type. When using a long copper pipe for R410A, it is recommended to select “Copper or copper-base pipe without seam” and one with a bonded oil amount 40mg/10m or less. Also, do not use crushed, deformed, discolored (especially inside) pipes. (Impurities cause clogging of expansion valves and capillary tubes.)

<Flare nut>

Use the flare nuts which are attached to the air conditioner unit.

Joint

The flare joint and socket joint are used for joints of the copper pipe. The joints are rarely used for installation of the air conditioner. However clear impurities when using them.

Required Tools for R410A

Mixing of different types of oil may cause a trouble such as generation of sludge, clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.

• Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))
• Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)
• Tools commonly used for R410A and for conventional refrigerant (R22)

The table below shows the tools exclusive for R410A and their interchangeability.

Tools exclusive for R410A (The following tools for R410A are required.)	Tools whose specifications are changed for R410A and their interchangeability
Vacuum pump	Use a vacuum pump by attaching a vacuum pump adapter.
Torque wrench
Pipe cutter
Reamer
Pipe bender
Level vial
Screwdriver (+, –)
Spanner or Monkey wrench
Hole core drill
Hexagon wrench (Opposite side 4mm)
Tape measure
Metal saw
Also prepare the following equipment for other installation methods and run checks.
Clamp meter
Thermometer
Insulation resistance tester
Electroscope
(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
(Note 2) Charging cylinder for R410A is being currently developed.

In addition to the above exclusive tools, the following equipment which serves also for R22 are necessary as the general tools.

No.	Used tool	Usage	R410A air conditioner installation	Conventional air conditioner installation
	Flare tool	Pipe flaring	Existence of conventional equipment for R410A can be used	Whether new equipment can be used with conventional refrigerant
	Copper pipe gauge for adjusting projection margin	Flaring by conventional flare tool	Yes ∗ (Note 1)	Yes
	Torque wrench	Connection of flare nut	Yes ∗ (Note 1)	∗ (Note 1)
	Gauge manifold	Evacuating, refrigerant charge, run check, etc.	No	No
	Charge hose	Vacuum evacuating	No	Yes
	Vacuum pump adapter	Refrigerant charge	No	Yes
	Electronic balance for refrigerant charging	Refrigerant charge	Yes	No
	Refrigerant cylinder	Gas leakage check	Yes	Yes
	Leakage detector	Refrigerant charge	No	No
	Charging cylinder	R410A air conditioner installation	(Note 2) No

Recharge of Refrigerant

When a recharge of the refrigerant is required, charge the new refrigerant with the specified amount in the procedure as described below.

• Never charge the refrigerant over the specified amount.
• Do not charge the additional refrigerant. If charging refrigerant additionally when refrigerant gas leaks, the refrigerant composition in the refrigerating cycle changes resulted in a change of air conditioner characteristics or refrigerant over the specified standard amount is charged and an abnormal high pressure is applied to the inside of the refrigerating cycle resulting in the cause of breakage or injury.
• Set the equipment so that liquid refrigerant can be charged.
• When using a cylinder with a siphon pipe, liquid can be charged without inverting the cylinder.

Gauge manifold

[Cylinder with siphon] [Cylinder without siphon]

OUTDOOR unit Gauge manifold OUTDOOR unit

Electronic balance Refrigerant cylinder Electronic balance

Siphon Refrigerant cylinder

Environment

Use the “Vacuum pump method” for an air purge (Discharge of air in the connecting pipe) in installation time.

• Do not discharge flon gas into the air to protect the earth environment.
• Using the vacuum pump method, clear the remained air (Nitrogen, etc.) in the unit. If the air remains, the pressure in the refrigerating cycle becomes abnormally high and an injury and others are caused due to burst.

VL VH

Connected to the indoor unit Main pipe

Valve fully closed (gas side) Center unit

Low-pressure gauge High-pressure gauge

Gauge manifold

Brazed Service port Service port

Ø6.4 Copper pipe Ø6.4 Copper pipe

Fully tightened Reducing valve Nitrogen gas

Valve fully closed (liquid side) Connected to other terminal units

(Charge the refrigerant as below.)

• Recover the refrigerant and check there is no refrigerant in the equipment. Leave it as it is for 1 to 2 minutes and check the indicator of the compound gauge does not return.
• Set the refrigerant cylinder on the electron balance, connect the charge hose to connecting ports of the cylinder and the electron gauge, and then charge the liquid refrigerant from the service port at the liquid side. (Shield with the gauge manifold so that refrigerant does not flow to the gas side.)
• Connect the charge hose to the packed valve service ports at the gas side, liquid side, and balance side of the outdoor unit.
• Open the packed valves of the balance pipe fully at liquid and gas sides, and then return the valve at the gas side a little to the closed side.
• Open fully PMV of the outdoor unit.
  • Turn on the power of the outdoor unit.
  • Short CN30 on I/F P.C. board of the outdoor unit.
  • Turn off the power of the outdoor unit within 2 minutes after short-circuiting.
• Open fully the handle Low of the gauge manifold, and then turn on the power of the vacuum pump for vacuuming.
• When the pressure has lowered until the indication of the compound gauge pointed -0.1MPa (–76cmHg), open fully the handle Low and turn off the power of the vacuum pump.
• Connect the charge hose to the vacuum pump adaptor. R410A refrigerant is consisted with HFC mixed refrigerant. Therefore if the refrigerant gas is charged, the composition of the charged refrigerant changes and characteristics of the equipment changes. 4mm-hexagonal wrench is required.

What is the cooling / heating capacity based on?

Cooling / heating capacity is based on single connection operation with standard piping length under Japanese Industrial Standard B 8615 Condition 1.

What are the remote controller and ceiling panel?

The remote controller and ceiling panel are sold separately.

What is the space necessary for equipping and service?

300 or less

What is the unit of measurement for the construction view?

mm

Where is the earth screw provided?

The earth screw is provided in the electric parts box.

Where is the air in the room sucked in from?

The air in the room is sucked in from the air inlet.

What do the air outlet / Louver do?

The air outlet/Louver change the direction of the air to be discharged according to cool/heat mode.

What happens when turning on the main power switch and leak breaker at the first time?

When turning on the main power switch and leak breaker at the first time, SETTING flashes on the display part of the remote controller.

What does it mean when the SETTING display is flashing?

While the SETTING display is flashing, the model is being automatically confirmed. Accordingly, wait for a while after the SETTING display has disappeared, and then use the remote controller.

When is the SETTING display displayed?

The SETTING display is displayed during setup of the timer etc.

When is the Operation mode select display displayed?

The selected operation mode is displayed.

When is the CHECK display displayed?

The CHECK display is displayed while the protective device works or a trouble occurs.

When is the Timer time display displayed?

Time of the timer with H mark is displayed. When a trouble occurs, the check code is displayed.

When is the Timer SET IN setup display displayed?

When pushing the Timer SET IN button, the display of the timer is selected in order of [OFF] → [OFF] repeat OFF timer → [ON] → No display.

When is the Filter display displayed?

If “FILTER ” is displayed, clean the air filter.

When is the TEST run display displayed?

The TEST run display is displayed during a test run.

When is the Louver position display displayed?

(4-way Air Discharge Cassette, 2-way Air Discharge Cassette, 1-way Air Discharge Cassette, Under Ceiling and High Wall Type only (2H. 3H)) Displays louver position.

When is the SWING display displayed?

The SWING display is displayed during up/down movement of the louver.

When is the Set up temperature display displayed?

The selected set up temp. is displayed.

When is the Remote controller sensor display displayed?

The Remote controller sensor display is displayed while the sensor of the remote controller is used.

When is the PRE-HEAT display displayed?

The PRE-HEAT display is displayed when the heating operation starts or defrost operation is carried out (Heat-pump model only).

What happens while the PRE-HEAT display is displayed?

While the PRE-HEAT display is displayed, the indoor fan stops or the mode enters in LOW.

When is the No function display displayed?

The No function display is displayed if there is no function even if the button is pushed.

When is the Air volume select display displayed?

The selected air volume mode is displayed.

What are the air volume select display options?

• (AUTO)
• (HIGH)
• (MED.)
• (LOW)

When is the Louver Number display displayed?

The Louver Number display is displayed as an example: 01, 02, 03, 04.

When is the Operation ready display displayed?

The Operation ready display is displayed when cooling or heating operation is impossible because the outdoor tempera-ture goes out of the operable range.

When is the Mode select control display displayed?

The Mode select control display is displayed when pushing “Operation mode select ” button while the operation mode is fixed to heating or cooling by the system manager of the air conditioner.

When is the Louver lock display displayed?

The Louver lock display is displayed when there is a louver-locked unit in the group (including 1 indoor unit by 1 outdoor unit) (4-way Air Discharge Cassette Type 2H series only).

When is the Unit Number display displayed?

The Unit Number display is displayed as the unit number of the indoor unit selected with the unit select button or abnormal indication of the indoor/outdoor unit.

When is the Central control display displayed?

The Central control display is displayed when the air conditioner is used under the central control in combination with a central control remote controller.

What happens in case the remote controller is disabled by the central control system?

In case the remote controller is disabled by the central control system, flashes. The button operation is not accepted. Even when you push ON/OFF, MODE, or TEMP. button, the button operation is not accepted. (Settings made by the remote controller vary with the central control mode. For details, refer to the Owner’s Manual of the central control remote controller.)

What does the operation section do?

Push each button on the operation section to select a desired operation.

What are the details of the operation?

The details of the operation need to be set up once, afterward, the air conditioner can be used by pushing the ON / OFF button only.

What does the FAN button (Air volume select button) do?

The FAN button (Air volume select button) selects the desired air volume mode.

When is the TIMER SET button (Timer set button) used?

The TIMER SET button (Timer set button) is used when the timer is set up.

When is the TEST button (Check button) used?

The TEST button (Check button) is used for the check operation. During normal operation, do not use this button.

When is the VENT button (Ventilation button) used?

The VENT button (Ventilation button) is used when a fan which is sold on the market is connected.

What does it mean if “No function ” is displayed on the remote controller when pushing the Ventilation button?

If “No function ” is displayed on the remote controller when pushing the Ventilation button, a fan is not connected.

What does the FILTER RESET button (Filter reset button) do?

The FILTER RESET button (Filter reset button) resets (Erases) “ FILTER” display.

What does the SAVE button (Power save operation) do?

The SAVE button has no function.

What does the SWING/FIX button (Swing/Wind direction button) do?

The SWING/FIX button (Swing/Wind direction button) selects automatic swing or setting the louver direction.

Is the SWING/FIX function provided to Concealed Duct Standard Type, High Static Pressure Type, Floor Standing Cabinet Type, Floor Standing Concealed Type, or Slim Duct Type?

This function is not provided to Concealed Duct Standard Type, High Static Pressure Type, Floor Standing Cabinet Type, Floor Standing Concealed Type, or Slim Duct Type.

What does the Operation lamp do?

The Operation lamp is lit during operation and off when stopped. Also it flashes when operating the protection device or abnormal time.

What does the ON/OFF button do?

When the ON/OFF button is pushed, the operation starts, and it stops by pushing the button again. When the operation has stopped, the operation lamp and all the displays disappear.

What does the MODE button (Operation mode select button) do?

The MODE button (Operation mode select button) selects desired operation mode.

What does the UNIT LOUVER button (Unit/Louver select button) do?

The UNIT LOUVER button (Unit/Louver select button) selects a unit number (left) and louver number (right).

What does UNIT on the UNIT LOUVER button do?

UNIT selects an indoor unit when adjusting wind direction when multiple indoor units are con-trolled with one remote controller.

What does LOUVER on the UNIT LOUVER button do?

LOUVER (4-way Air Discharge Cassette Type 2H series only) selects a louver when setting louver lock or wind direction adjustment independently.

What does the TEMP. button (Set up temperature button) do?

The TEMP. button (Set up temperature button) adjusts the room temperature. Set the desired set temperature by pushing TEMP. or TEMP…

What does the Remote controller sensor do?

Usually the TEMP. sensor of the indoor unit senses the temperature. The temperature on the surrounding of the remote controller can also be sensed. For details, contact the dealer from which you have purchased the air conditioner.

What happens in case that one remote controller controls the multiple indoor units?

In case that one remote controller controls the multiple indoor units, the setup operation is unavailable in group control.

What does the letter at the inside of the terminal block indicate?

The letter at the inside of the terminal block indicates the terminal number.

What do a dotted line and broken line indicate?

A dotted line and a broken line indicate the wiring site.

What does ~ indicate?

~ indicates the control P.C. board.

What is the name of each part?

Symbol	Parts name
FM	Fan Motor
TA	Indoor temp. sensor
TC1, TC2, TCJ	Temp. sensor
LM1, 2, 3, 4	Louver Motor
DM	Drain pump Motor
FS	Float Switch
PMV	Pulse Motor Valve
TR	Power supply Transformer (Fot Nwtwork adapter)

What are the parts ratings for MMU-AP0092H AP0122H AP0152H AP0182H AP0242H AP0272H AP0302H?

Model	Fan motor	Motor for horizontal grille	Pulse motor	Pulse motor valve	TA sensor	TC1 sensor	TC2 sensor	TCJ sensor	Float switch	Drain pump motor
MMU-AP0092H AP0122H AP0152H AP0182H AP0242H AP0272H AP0302H	SWF-230-60-2R	MP24ZN3N	EDM-MD12TF-3	EDM-B25YGTF-3 EDM-B40YGTF-2	Lead wire length : 310 mm Vinyl tube	Ø4 size lead wire length : 1200 mm Vinyl tube (Blue)	Ø6 size lead wire length : 1000 mm Vinyl tube (Black)	Ø6 size lead wire length : 1000 mm Vinyl tube (Red)	FS-0218-102	MDP-1401

What are the parts ratings for MMU-AP0362H AP0482H AP0562H?

Model	Fan motor	Motor for horizontal grille	Pulse motor	Pulse motor valve	TA sensor	TC1 sensor	TC2 sensor	TCJ sensor	Float switch	Drain pump motor
MMU-AP0362H AP0482H AP0562H	ICF-280-150-1	MP24ZN3N	EDM-MD12TF-3	EDM-B60YGTF-1	Lead wire length : 310 mm Vinyl tube	Ø4 size lead wire length : 1200 mm Vinyl tube (Blue)	Ø6 size lead wire length : 1000 mm Vinyl tube (Black)	Ø6 size lead wire length : 1000 mm Vinyl tube (Red)	FS-0218-103	MDP-1401

What do the display section examples show?

In the display example, all indicators are displayed for the explanation. In reality only, the selected contents are indicated.

How do you operate the air conditioner after it has not been used for a long period of time?

Turn on the power switch at least 12 hours before starting operation.

How do you start the air conditioner?

Push the ON / OFF button. The operation lamp goes on, and the operation starts.

How do you select an operation mode?

Select an operation mode with the MODE button. One push of the button, and the display changes in the order shown as follows.

Is the DRY mode function provided to Concealed Duct High Static Pressure Type?

No.

How do you select air volume?

Select air volume with the FAN button. One push of the button, and the display changes in the order shown as follows.

How does the air conditioner determine air volume when the setting is on AUTO?

When air volume is AUTO, the air volume differs according to the room temperature.

What is the air volume in DRY mode?

In DRY mode, AUTO is displayed and the air volume is LOW.

What should a user do if the room temperature is not heated sufficiently with VOLUME LOW operation?

Select MED. or HIGH operation.

Where does the temperature sensor sense temperature?

The temperature sensor senses temperature near the air inlet of the indoor unit, which differs from the room temperature depending on the installation condition.

What is a value of setting temperature a measure of?

A value of setting temperature is the measure of room temperature.

Is the air volume of function provided to Concealed Duct High Static Pressure Type?

No, but air speed HIGH only is displayed.

How do you determine the set up temperature?

Determine the set up temperature by pushing the TEMP. or TEMP. button.

How do you stop the air conditioner?

Push the ON / OFF button. The operation lamp goes off, and the operation stops.

How long after starting the cooling operation will it start?

The cooling operation will start after approx. 1 minute.

How long after starting the heating operation (For Heat-pump model only) will the operation mode be selected and the operation start?

The heating operation mode is selected in accordance with the room temperature and the operation starts after approximately 3 to 5 minutes.

How long may the FAN operation continue for after the heating operation has stopped?

After the heating operation has stopped, FAN operation may continue for approx. 30 seconds.

What happens when the room temperature reaches the set temperature?

The super low wind is discharged and the air volume decreases excessively.

What happens during defrost operation?

The fan stops so that cool air is not discharged. (“PRE-HEAT” is displayed.)

How long will the air conditioner not operate after restarting the operation immediately after stop?

When restarting the operation immediately after stop, the air conditioner does not operate for approx. 3 minutes to protect the machine.

How does the Super Heat Recovery Type air conditioner operate when you set the air conditioner in AUTO mode or switch over from AUTO operation because of some settings change?

It will automatically select either cooling, heating, or fan only operation depending on the indoor temperature.

How do you set the desired temperature?

Use the Temperature button.

How long after starting the cooling operation in Auto mode will it start?

The cooling operation will start after approx. 1 minute.

How long after starting the heating operation in Auto mode will the operation mode be selected and the operation start?

The operation mode is selected in accordance with the room temperature and operation starts after approximately 3 to 5 minutes.

Is it necessary to set the fan speed when you select Auto mode?

No.

What will the FAN speed display show in Auto mode?

AUTO.

How will the fan speed be controlled in Auto mode?

Automatically.

How long may the FAN operation continue for after the heating operation in Auto mode has stopped?

After the heating operation has stopped, FAN operation may continue for approx. 30 seconds.

What happens when the room temperature reaches the set temperature and the outdoor unit stops?

The super low wind is discharged and the air volume decreases excessively.

What happens during defrost operation in Auto mode?

The fan stops so that cool air is not discharged and “HEAT READY” is displayed.

What can you do if the Auto mode is uncomfortable?

You can select the desired conditions manually.

How long will the air conditioner not operate after restarting the operation immediately after stop when the air conditioner is in Auto mode?

When restarting the operation immediately after stop, the air conditioner does not operate for approx. 3 minutes to protect the machine.

How do you stop the air conditioner when it is in Auto mode?

Push the ON / OFF button again.

How do you start the air conditioner when it is in Auto mode?

Push the ON / OFF button.

How do you select Auto mode?

Select Auto using the Mode select button (MODE).

How do you adjust the louvers (adjustment of up/down wind direction) for best cooling and heating performance?

Adjust them appropriately.

What may happen if cooling operation is performed with downward air outlet?

Dew may fall on the surface of the cabinet or the horizontal louver resulted in dripping.

What may happen if heating operation is performed with horizontal air outlet?

Unevenness of temperature may increase in the room.

How should you move the horizontal louver?

Do not move the horizontal louver directly with hands; otherwise a trouble is caused. Select direction of the horizontal louver using the SWING/FIX switch on the remote controller.

Does the horizontal louver stop immediately even if the SWING/FIX switch is pushed?

No.

How do you adjust the stop position of the horizontal louver?

Push the switch.

Where should you use the louvers in Cooling operation?

Use the louvers with horizontal set point.

Where should you use the louvers in Heating operation (For Heat-pump model only)?

Use the louvers with downward set point.

How do you change the air outlet direction to right or left side for Under Ceiling, 1-way Air Discharge Cassette, High Wall Type?

To change the air outlet direction to right or left side, set the vertical louver inside of the horizontal louver to the desired direction.

What happens to the louvers of 4-way Air Discharge Cassette Type (1H series), Compact 4-way Type when the air conditioner is not operating?

The louvers automatically direct downward.

Where do the louvers of 4-way Air Discharge Cassette Type (1H series), Compact 4-way Type direct while the air conditioner is in ready status for heating?

The louvers direct upward.

When does the swinging operation start for 4-way Air Discharge Cassette Type (1H series), Compact 4-way Type?

The swinging operation starts after heating ready status has been cleared.

What is displayed on the remote controller for 4-way Air Discharge Cassette Type (1H series), Compact 4-way Type even if the status is ready to heating?

“SWING”.

What happens to the louvers of 4-way Air Discharge Cassette Type (2H series) when the air conditioner is not operating?

The louvers automatically close.

When do the louvers of 4-way Air Discharge Cassette Type (2H series) direct horizontally?

The louvers direct horizontally when heating begins, during defrost operation, or during the minimum operation after reaching the set temperature.

What happens when you make a swing or air direction setting for 4-way Air Discharge Cassette Type (2H series) when the louvers are pointed straight out horizontally?

The remote controller display varies with the setting, but the louvers stay pointed straight out horizontally.

Where do the louvers of 4-way Air Discharge Cassette Type (2H series) direct when the air conditioner starts heating?

The louvers direct to the set direction.

Why may the louver of the stopped indoor unit may open for several minutes even if the outdoor units stop?

As the refrigerant recovery control for the outdoor units in the Modular Multi system works even if the outdoor units stop.

Where should you direct the louvers for Cooling (Cool)?

Direct the louvers horizontally.

Where should you direct the louvers for Heating (Heat)?

Direct the louvers downward.

Can cold air and hot air be discharged for two directions or three directions?

Yes, according to the shape or arrangement of the room.

Who should you contact for details about discharging cold and hot air for two directions or three directions?

Contact the dealer.

How do you set up the wind direction for 4-way Air Discharge Cassette, 1-way Air Discharge Cassette (2SH series), Under Ceiling Type?

Push SWING/FIX during operation.

How does the wind direction change?

The wind direction changes for every push of the button.

Where should you direct the louver (adjustment plate of up/down wind direction) in HEAT operation (For Heat-pump model only)?

Direct the louver downward.

What may happen if you direct the louver horizontally in HEAT operation (For Heat-pump model only)?

Hot air may not come to the foot.

Where should you direct the louver (adjustment plate of up/down wind direction) in COOL/DRY operation?

Direct the louver horizontally.

What may happen if you direct the louver downward in COOL/DRY operation?

The dew may form on the surface of the air discharge port and may drop down.

How should you direct the louver (adjustment plate of up/down wind direction) in FAN operation?

Select a desired wind direction.

How do you start swinging the louver for 4-way Air Discharge Cassette, 1-way Air Discharge Cassette (2SH series), Under Ceiling Type?

1. Push SWING/FIX.
2. Set the louver (adjustment plate of up/down wind direction) direction to the lowest position.
3. Push SWING/FIX again.

What is displayed and what happens when the up/down wind direction is automatically selected?

SWING is displayed and the up/down wind direction is automatically selected.

How do you stop swinging the louver for 4-way Air Discharge Cassette, 1-way Air Discharge Cassette (2SH series), Under Ceiling Type?

Push SWING/FIX at a desired position while the louver is swinging.

Where can the wind direction be set from when SWING/FIX is pushed after swinging?

The wind direction can be set again from the highest position.

Is the highest position of the louver selected even if SWING/FIX is pushed while the louver is swinging?

No. The louver position is displayed but highest position of the louver may not be selected.

What should you do if the highest position of the louver may not be selected?

Push SWING/FIX again two seconds later.

Does the louver stop in COOL/DRY operation as it directs downward?

No.

Where does the louver stop during swing operation if you stop the louver as it directs downward in COOL/DRY operation?

It stops after moving to the third position from the highest position.

When can wind direction be set for each indoor unit by selecting individually?

When multiple indoor units are controlled with one remote controller.

How do you set wind direction individually?

1. Push UNIT LOUVER button to display an indoor unit number in the control group.
2. Set the wind direction of the displayed indoor unit.

What happens when no indoor unit number is displayed?

All indoor units in the control group can be controlled simultaneously.

How does the display change each time you push the UNIT LOUVER button?

The display changes as follows:

How do you set louver wind direction individually for 4-way Air Discharge Cassette Type (2H series only)?

1. Select an indoor unit to be set by pushing UNIT LOUVER (left side of the button) during operation.
2. Select a louver you want to adjust change by pushing UNIT LOUVER (right side of the button).
3. Determine wind direction of the selected louver by pushing SWING/FIX.

How does the indoor unit number change when setting louver wind direction individually for 4-way Air Discharge Cassette Type (2H series only)?

The indoor unit number changes each time you push the button.

What happens when no unit number is displayed when setting louver wind direction individually for 4-way Air Discharge Cassette Type (2H series only)?

All indoor units are selected.

How does the display on the left of the remote controller change each time you push the button when setting louver wind direction individually for 4-way Air Discharge Cassette Type (2H series only)?

The display changes as follows:

What happens when no louver number is displayed when setting louver wind direction individually for 4-way Air Discharge Cassette Type (2H series only)?

All four louvers are selected.

How does the display change each time you push the button when determining wind direction of the selected louver for 4-way Air Discharge Cassette Type (2H series only)?

The display changes as follows:

Are (4) and (5) displayed during COOL (DRY) mode when setting louver wind direction individually for 4-way Air Discharge Cassette Type (2H series only)?

No.

What happens when you push the SWING/FIX button during operation to setup air direction and swinging for 2-way Air Discharge Cassette, 1-way Air Discharge Cassette Type (1YH series)?

[SWING] is displayed and the air direction automatically changes upward/downward.

Can each indoor unit be selected and its air direction be set up when one remote controller controls multiple indoor units?

Yes.

What happens when you push SWING/FIX button again during swinging of the louver for 2-way Air Discharge Cassette, 1-way Air Discharge Cassette Type (1YH series)?

The air outlet louver can be stopped at the desired position.

How do you set up the air direction individually for 2-way Air Discharge Cassette, 1-way Air Discharge Cassette Type (1YH series)?

Push UNIT LOUVER button to display each indoor unit No. in a group control. Then set up the air direction to a displayed indoor unit.

What happens if there is no display when setting up the air direction individually for 2-way Air Discharge Cassette, 1-way Air Discharge Cassette Type (1YH series)?

All the indoor units can be operated collectively.

How does the display change when pushing the UNIT LOUVER button when setting up the air direction individually for 2-way Air Discharge Cassette, 1-way Air Discharge Cassette Type (1YH series)?

The display exchanges as shown in the figure.

What are the types of timer operations that can be selected?

• OFF timer : The operation stops when the time of timer has reached the set time.
• Repeat OFF timer : Every time, the operation stops after the set time has passed.
• ON timer : The operation starts when the time of timer has reached the set time.

What is the maximum setting of hours for timer operation?

Setting of up to 168 hours is enabled.

How do you set timer operation?

1. Push TIMER SET button.
2. Push TIME to select “SET TIME”.
3. Push SET button.

What happens each time you push the TIMER SET button when setting timer operation?

The timer display (type) changes for every push of the button.

What happens when you push TIMER SET when setting timer operation?

SETTING and timer time displays flash.

What happens for every push of the button after pushing TIME to select “SET TIME” when setting timer operation?

The set time increases in the unit of 0.5 hr (30 minutes).

What happens when setting a time more than 24 hours for timer operation?

Timer time can be set in the unit of 1 hr.

What is the maximum set time when setting timer operation?

The maximum set time is 168hr (7 days).

How does the remote controller display the set time when setting timer operation?

The remote controller displays the set time with time (between 0.5 and 23.5 hours) (* 1) or number of days and time (24 hours or more) (* 2) as shown below.

What happens for every push of the button when setting timer operation?

The set time decreases in the unit of 0.5 hr (30 minutes) (0.5 to 23.5 hours) or 1 hr (24 to 168 hours).

What happens when you push SET when setting timer operation?

• SETTING display disappears.
• Timer time display goes on.
• or display flashes.
• When ON timer is activated, timer time, ON timer are displayed and other displays disappear.

How do you cancel timer operation?

Push the CL button. TIMER display disappears.

What happens when the operation stops after the timer reached the preset time?

The Repeat OFF timer resumes the operation by pushing ON / OFF button and stops the operation after the reached the set time.

What happens when you push SWING/FIX while the OFF timer function of the air conditioner is active?

The indication of the timer function disappears and then appears again after about 5 seconds.

Why does the indication of the timer function disappear and reappear after about 5 seconds when pushing SWING/FIX while the OFF timer function is active?

This is due to normal processing of the remote controller.

Where should you check that the air conditioner is not installed?

Check that the air conditioner is not installed in a place subject to combustible gas leak.

Why should you check that the air conditioner is not installed in a place subject to combustible gas leak?

Accumulation of combustible gas around the unit may cause a fire.

Where should you drain the dehumidified water from the indoor unit and outdoor unit?

To a well-drained place.

Should you put any obstacle near the air inlets and air outlet of the outdoor unit?

No.

What may happen if an obstacle is near the air inlets and air outlet of the outdoor unit?

It may hinder the radiation, which may reduce the performance or activate the protective device.

What should you connect when wiring the air conditioner electrically?

Be sure to connect the earth wire.

What may happen if the earth wire is not connected (grounding work) properly?

Incomplete grounding cause an electric shock.

Where should you not connect ground wires to?

• Gas pipes.
• Water pipes.
• Lightning rods.
• Ground wires for telephone wires.

What should you make sure is connected when wiring the air conditioner electrically?

Make sure that a leakage breaker is connected.

What may happen if you use the air conditioner without leakage breaker?

It may cause electric shock.

What type of leakage breaker should you use?

Use a leakage breaker with an appropriate capacity.

What should you use for the power supply of the air conditioner?

Be sure to use the rated voltage and an exclusive circuit.

Where should you not install the air conditioner?

• Do not install the air conditioner in any place within 1 m from a TV, stereo, or radio set.
• Do not install the air conditioner near a high frequency appliance (sewing machine or massager for business use, etc.).
• Do not install the air conditioner in a humid or oily place.
• Do not install the air conditioner in a place where steam, soot, or corrosive gas is generated.
• Do not install the air conditioner in a salty place such as seaside area.
• Do not install the air conditioner in a place where a great deal of machine oil is used.
• Do not install the air conditioner in a place where it is usually exposed to strong wind such as in seaside area.
• Do not install the air conditioner in a place where sulfureous gas generated such as in a spa.
• Do not install the air conditioner in a vessel or mobile crane.
• Do not install the air conditioner in an acidic or alkaline atmosphere.
• Do not install the air conditioner near an obstacle (air vent, lighting equipment, etc.) that disturbs discharge air.
• Do not use the air conditioner for special purposes such as preserving food, precision instruments, or art objects, or where breeding animals or growing plants are kept.
• Do not install the air conditioner over an object that must not get wet.
• Do not install the air conditioner in a place where an organic solvent is used.
• Do not install the air conditioner near a door or window subject to humid outside air.
• Do not install the air conditioner in a place where special spray is used frequently.

What might happen if the air conditioner is installed within 1 m from a TV, stereo, or radio set?

Noise transmitted from the air conditioner affects the operation of these appliances.

What might happen if the air conditioner is installed near a high frequency appliance (sewing machine or massager for business use, etc.)?

The air conditioner may malfunction.

What may happen if the air conditioner is installed in an acidic or alkaline atmosphere (in a hot-spring area or near a chemicals factory, or in a place subject to combustion emissions)?

Corrosion may be generated on the aluminum fin and copper pipe of the heat exchanger.

What may happen if the air conditioner is installed near an obstacle that disturbs discharge air?

Turbulent airflow may reduce the performance or disable devices.

What may happen if you use the air conditioner for special purposes such as preserving food, precision instruments, or art objects, or where breeding animals or growing plants are kept?

This may degrade the quality of preserved materials.

What may happen if you install the air conditioner over an object that must not get wet?

Condensation may drop from the indoor unit at a humidity of 80% or more or when the drain port is clogged.

What may happen if you install the air conditioner near a door or window subject to humid outside air?

Condensation may form on the air conditioner.

Where should you not install the air conditioner in relation to your neighbors?

Do not install the air conditioner in a place where noise by outdoor unit or hot air from its air outlet annoys your neighbors.

How should you install the air conditioner?

Install the air conditioner on a solid and stable foundation so that it prevents transmission of resonating, operation noise and vibration.

What might you hear when one indoor unit is operating?

Some sound may be audible from other indoor units that are not operating.

What should you do before maintenance?

Be sure to turn off the main power switch prior to the maintenance.

Should you do the daily maintenance and/or Air Filter cleaning yourself?

No.

Why should you not clean the air filter yourself?

Cleaning of the air filter and other parts of the air filter involves dangerous work in high places, so be sure to have a service person do it.

For what type of maintenance should you make sure to ask the qualified service person?

For daily maintenance including Air Filter cleaning, make sure to ask the qualified service person particularly following models; 4-way Air Discharge Cassette Type Concealed Duct Standard Type Under Ceiling Type 2-way Air Discharge Cassette Type Slim Duct Type 1-way Air Discharge Cassette Type Concealed Duct High Static Pressure Type.

What will happen when the air filters get clogged?

Clogging of air filters will reduce the cooling and heating performance.

When should you clean the air filters?

When FILTER appears on the remote controller.

What should you do when the cleaning of air filters has been completed?

Push the FILTER RESET button.

What happens when you push the FILTER RESET button?

FILTER disappears.

How should you clean the unit?

Clean the unit with a soft dry cloth.

What should you do if dirt cannot be removed with the dry cloth when cleaning the unit?

Use a cloth slightly dampened with lukewarm (under 40 °C) water.

What should you use to clean the remote controller?

Use a dry cloth to wipe the remote controller.

When can you use a cloth dampened with cold water when cleaning?

On the indoor unit if it is very dirty.

Should you use a damp cloth on the remote controller?

No.

Should you use a chemically-treated duster for wiping or leave such materials on the unit for long?

No.

What might happen if you use a chemically-treated duster for wiping or leave such materials on the unit for long?

It may damage or fade the surface of the unit.

Should you use benzine, thinner, polishing powder, or similar solvents for cleaning?

No.

What might happen if you use benzine, thinner, polishing powder, or similar solvents for cleaning?

These may cause the plastic surface to crack or deform.

What may happen to parts of the air conditioner after long-period use?

Long-period use of the air conditioner may cause deterioration or failure of parts due to heat, humidity, dust, and operating conditions, or may cause poor drainage of dehumidified water.

What should you do if you do not plan to use the unit for more than 1 month?

1. Operate the fan for 3 to 4 hours to dry inside the unit.
2. Stop the air conditioner and turn off the main power switch or the circuit breaker.

What mode should you operate to dry the inside of the unit?

Operate FAN mode.

What should you check before operation?

1. Check that the air filters are installed.
2. Check that the air outlet or inlet is not blocked.
3. Turn on the main power switch or the circuit breaker for the main power supply to the air conditioner.

Is it recommended that the indoor and outdoor units of the air conditioner in use be cleaned and maintained regularly to ensure efficient operation of the air conditioner?

Yes, for environmental conservation.

How often is periodic maintenance recommended?

Periodic maintenance (once a year) is recommended when the air conditioner is operated for a long time.

What should you regularly check the outdoor unit for?

Regularly check the outdoor unit for rust and scratches.

What should you do if you see rust and scratches on the outdoor unit?

Remove them or apply rustproof treatment, if necessary.

How often should you clean the indoor unit and outdoor unit?

As a general rule, when an indoor unit is operated for 8 hours or more daily, clean the indoor unit and outdoor unit at least once every 3 months.

Who should you ask to do the cleaning/maintenance work?

Ask a professional.

What are the benefits of regular cleaning and maintenance?

Such maintenance can extend the life of the product though it involves the owner’s expense.

What will happen if you do not clean the indoor and outdoor units regularly?

Failure to clean the indoor and outdoor units regularly will result in poor performance, freezing, water leakage, and even compressor failure.

What should you check (visual/auditory) on the heat exchanger?

• Dust/dirt clogging.
• Scratches.

What should you check (visual/auditory) on the fan motor?

Sound.

What should you check (visual/auditory) on the filter?

• Dust/dirt.
• Breakage.

What should you check (visual/auditory) on the fan?

• Vibration.
• Balance.

What should you check (visual/auditory) on the air inlet/outlet grilles?

• Dust/dirt.
• Appearance.

What should you check (visual/auditory) on the drain pan?

• Dust/dirt clogging.
• Drain contamination.

What should you check (visual/auditory) on the ornamental panel, louvers?

• Dust/dirt.
• Scratches.

What should you do to maintain the heat exchanger?

• Wash the heat exchanger when it is clogged.
• Take appropriate measures when abnormal sound is generated.

What should you do to maintain the filter?

• Wash the filter with water when it is contaminated.
• Replace it when it is damaged.

What should you do to maintain the fan?

• Replace the fan when vibration or balance is terrible.
• Brush or wash the fan when it is contaminated.

What should you do to maintain the air inlet/outlet grilles?

• Fix or replace them when they are deformed or damaged.

What should you do to maintain the drain pan?

• Clean the drain pan and check the downward slope for smooth drainage.

What should you do to maintain the ornamental panel, louvers?

• Wash them when they are contaminated or apply repair coating.

Who should you ask to reinstall the air conditioner to a new place or move it to another place?

Ask the dealer or an installation professional.

What may happen if the air conditioner is inappropriately installed by yourself?

It may cause electric shock or fire.

How should you clean the heat exchanger?

Be sure to clean the heat exchanger with pressurized water.

What may happen if an commercially detergent (strong alkaline or acid cleaning agent) is used to clean the heat exchanger?

The surface treatment of the heat exchanger will be marred, which may degrade the self cleaning performance.

Who should you contact for details about cleaning the heat exchanger?

Contact the dealer.

What should you check before operation?

• Check whether earth wire is disconnected or out of place.
• Check that air filter is installed to the indoor unit.
• Check that the air outlet or inlet is not blocked.
• Turn on the main power switch or the circuit breaker for the main power supply to the air conditioner.

What type of system is adopted for heating (for Heat-pump model only)?

For heating, a heat pump system which sucks in outside heat air and discharges it into the room is adopted.

What happens to the heating capacity if temperature of the outside air lowers?

The heating capacity decreases.

What is recommended when temperature of the outside air is low?

It is recommended to use other heating equipment together.

What happens if the outdoor unit has some frost during heating operation (for Heat-pump model only)?

The operation mode changes automatically to defrost mode to increase the heating effect (for approx. 2 to 10 minutes).

What happens to the fans of the indoor and the outdoor units during defrost operation?

During defrost operation, the fans stop.

How long will the outdoor unit not operate after air conditioner has been immediately restarted after stop, or power switch has been turned on?

The outdoor unit does not operate for approx. 3 minutes.

Why does the outdoor unit not operate for approximately 3 minutes after being restarted or after the power switch has been turned on?

This is to protect the system.

What happens to the air conditioner during a main power failure?

If a power failure occurred during the operation, all operations stop.

What should you do when restarting the operation after a power failure?

Push ON/OFF button again.

What happens to the fan on indoor units on standby while other indoor units operate?

The fan rotates to protect the machine once per approx. 1 hour for several minutes.

What does the high pressure switch do?

The high pressure switch stops the air conditioner automatically when excessive load is applied to the air conditioner.

What happens if the protective device works?

• The operation lamp keeps lit.
• The operation stops.
• “” in the remote controller display part flash.

When might the protective device work in Cooling operation?

• When the air inlet or air outlet of the outdoor unit is blocked.
• When strong wind blows continuously against the air outlet of the outdoor unit.

When might the protective device work in Heating operation?

• When dust or dirt is excessively adhered to air filter of the indoor unit.
• When the air outlet of the indoor unit is blocked.

Can each indoor unit be individually controlled in Modular Multi system air conditioner?

Yes.

Can cooling operation and heating operation be performed concurrently for the indoor units which are connected to one outdoor unit?

No.

What happens when cooling operation and heating operation are performed concurrently for indoor units connected to one outdoor unit?

• The indoor unit which is performing cooling operation stops.
• “ ” on the display is lit.
• The indoor unit which is performing heating operation continues operation.

When the following symptoms are found, what should I check before asking for repair servicing?

Check the points described below before asking for repair servicing. It is not a failure. Check again.

• Outdoor unit
  • White misty cold air or water is out.
  • Sometimes, noise “Pushu!” is heard.
• Indoor unit
  • “Swish” sound is heard sometimes.
  • Slight “Pishi!” sound is heard.
  • Discharge air smells.
  • “ ” indication is lit.
  • Sound or cool air is output from the standby indoor unit.
  • When the power of the air conditioner is turned on, “Ticktock” sound is heard.
• Fan and louvers of the indoor unit moves when the unit is not operated.
• Operates or stops automatically.
• Does not operate.
• Air is not cooled or warmed sufficiently.

Why does the fan of the outdoor unit stop automatically?

The fan of the outdoor unit stops automatically and performs defrost operation.

Why is a “Pushu!” sound heard from the outdoor unit sometimes?

A “Pushu!” sound may be heard when the solenoid valve works when defrost operation starts or finishes.

Why are there sounds of water flowing from the indoor unit?

When the operation has started, during the operation, or immediately after the operation has stopped, a sound such as water flows may be heard, and the operation sound may become larger for 2 or 3 minutes immediately after the operation has started. They are flowing sound of refrigerant or draining sound of dehumidifier.

Why does a “Swish” sound come from the indoor unit sometimes?

This is a sound generated when the heat exchanger, etc., expand and contract slightly due to a change of temperature.

Why is there a slight “Pishi!” sound coming from the indoor unit?

This is a sound generated when the heat exchanger, etc., expand and contract slightly due to a change of temperature.

Why does the discharge air from the indoor unit smell?

Various smells, such as one of wall, carpet, clothes, cigarette, or cosmetics, adhere to the air conditioner.

Why is the " " indication lit?

The " " indication is lit:

• When cooling operation cannot be performed because another indoor unit performs heating operation.
• When the manager of the air conditioner has fixed the operation to COOL or HEAT, and an operation contrary to the setup operation is performed.
• When the fan operation stopped to prevent the discharge of hot air.
• When COOL and HEAT are selected simultaneously. (" " indication is lit on the display of the remote controller.)
• When COOL and HEAT are selected simultaneously. (" " indication is lit on the display of the remote controller.)

Why is there sound or cool air output from the standby indoor unit?

Since the refrigerant is flowed temporarily to prevent the stay of oil or refrigerant in the standby indoor unit, the sound of flowing refrigerant, “Kyururu” or “Shaa”, may be heard or white steam when other indoor unit operates in HEAT mode, and cold air in COOL mode may be blown-out.

Why is a “Ticktock” sound heard when the power of the air conditioner is turned on?

A “Ticktock” sound is generated when the expansion valve operates when power has been turned on.

Why do the fan and louvers of the indoor unit move when the unit is not operated?

Intermittent operation of the fan with louvers open is sometimes carried out for the refrigerant recovery control of an unoperated unit.

Why does the air conditioner not operate?

The air conditioner may not operate for the following reasons:

• Is the timer “ON” or “OFF”?
• Is it a power failure?
• Is the power switch turned off?
• Is the power fuse or breaker blown?
• Has the protective device operated? (The operation lamp goes on.)

Why is the air not cooled or warmed sufficiently?

The air may not be cooled or warmed sufficiently for the following reasons:

• Is the timer “ON”? (The operation lamp goes on.)
• Are COOL and HEAT selected simultaneously? (“ ” indication is lit on the display of the remote controller.)
• Is the air inlet or air outlet of the outdoor unit obstructed?
• Are any door or window open?
• Is the air filter clogged with dust?
• Is the discharge louver of the indoor unit set at the appropriate position?
• Is air selection set to “LOW” “MED”, and is the operation mode set to “FAN”?
• Is the setup temp. the appropriate temperature?
• Are COOL and HEAT selected simultaneously? (“ ” indication is lit on the display of the remote controller.)

What should I do if any of the following conditions occur?

If any of the following conditions occur, turn off the main power supply switch and immediately contact the dealer:

• Switch operation does not work properly.
• The main power fuse often blows out, or the circuit breaker is often activated.
• A foreign matter or water falls inside the air conditioner.
• When the air conditioner does not operate even after the cause of the protective device activation has been removed. (The operation lamp and on the remote controller are flashing.)
• Any other unusual conditions are observed.

When a trouble occurs in the air conditioner, what appears on the display part of the remote controller?

When a trouble occurred in the air conditioner, the check code and the indoor unit No. appear on the display part of the remote controller. The check code is only displayed during operation. If the display disappears, operate the air conditioner according to the following “Confirmation of error history” for confirmation.

How do I confirm the error history when a trouble occurs on the air conditioner?

When a trouble occurred on the air conditioner, the trouble history can be confirmed with the following procedure. (The trouble history is stored in memory up to 4 troubles.)

• The history can be confirmed from both operating status and stop status.

What is the procedure for confirming the error history?

Procedure	Description
1	When pushing SET and TEST buttons at the same time for 4 seconds or more, the following display appears.
2	If [Service check] is displayed, the mode enters in the trouble history mode.

• [01: Order of trouble history] is displayed in CODE No. window.
• [Check code] is displayed.
• [Indoor unit address in which an error occurred] is displayed in UNIT No. 3 | Every pushing of [ / ] button used to set temperature, the trouble history stored in memory is displayed in order. The numbers in CODE No. indicate CODE No. \ (latest) → \ (oldest).

Why should I not push the CL button during the error history confirmation process?

Do not push the CL button because all the trouble history of the indoor unit will be deleted.

How do I return to the usual display after confirming the error history?

After confirmation, push the TEST button to return to the usual display.

What are the steps I should take if a trouble occurs on the air conditioner?

1. Check the troubles according to the above procedure.
2. Ask an authorized dealer or qualified service (maintenance) professional to repair or maintain the air conditioner.
3. More details of the service code are explained in the Service Manual.

Check these items. If any of these problems still remain, stop the operation, turn off the leakage breaker, and then notify the dealer of the serial number and details of the error.

Never repair any part by yourself as it is dangerous.

When and a combination of , , , or and a number are displayed on the remote controller, also inform the dealer of the display content.

What accessory parts are sold separately?

• The ceiling panel and remote controller are sold separately.
• The wireless type remote controller is designed to be installed by attaching a wireless remote controller kit (sold separately) to the standard panel. (The wireless remote controller kit consists of a wireless remote controller and adjust corner caps with a receiver section.)

What are the safety precautions for installation?

• Ensure that all Local, National and International regulations are satisfied.
• Read this “PRECAUTIONS FOR SAFETY” carefully before installation.
• The precautions described below include the important items regarding safety. Observe them without fail.
• After the installation work, perform a trial operation (test run) to check for any problem.
• Follow the Owner’s Manual to explain how to use and maintain the unit to the customer.
• Turn off the main power supply switch (or breaker) before the unit maintenance.
• Ask the customer to keep the Installation Manual together with the Owner’s Manual.

What are the warnings for installing/maintaining the air conditioner?

• Ask an authorized dealer or qualified installation professional to install (including moving)/maintain the air conditioner. Inappropriate installation may result in water leakage, electric shock, or fire.
• Be sure to connect the earth wire. (grounding work) Incomplete grounding cause an electric shock. Do not connect ground wires to gas pipes, water pipes, lightning rods, or ground wires for telephone wires.
• Turn off the main power supply switch or breaker before attempting any electrical work. Make sure all power switches are off. Failure to do so may cause electric shock.
• Install the refrigerant pipe securely during the installation work before operating the air conditioner. If the air conditioner is operated with the valve open and without the refrigerant pipe, the compressor sucks air and the refrigeration cycle is overpressurized, which may cause a burst or injury.
• When moving the air conditioner for the installation into another place, be very careful not to enter any gaseous matter other than the specified refrigerant into the refrigeration cycle. If air or any other gas is mixed in the refrigerant, the gas pressure in the refrigeration cycle becomes abnormally high and it resultingly causes pipe bursts and injuries to persons.
• Perform installation work properly according to the Installation Manual. Inappropriate installation may result in water leakage, electric shock, or fire.
• Install the air conditioner securely in a location where the base can sustain the weight adequately.
• Perform the specified installation work to guard against an earthquake. If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.
• Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make sure the air conditioner uses an exclusive power supply. An insufficient power supply capacity or inappropriate installation may cause fire.

What should I do if refrigerant gas has leaked during the installation work?

If refrigerant gas has leaked during the installation work, ventilate the room immediately. If the leaked refrigerant gas comes into contact with fire, noxious gas may generate.

What should I do after the installation work is finished in regards to the refrigerant gas?

After the installation work, confirm that refrigerant gas does not leak. If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas might generate.

How should I perform the electrical work for the air conditioner?

• Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make sure the air conditioner uses an exclusive power supply. An insufficient power supply capacity or inappropriate installation may cause fire.
• Use the specified wires for wiring connect the terminals securely fix. To prevent external forces applied to the terminals from affecting the terminals.
• Conform to the regulations of the local electric company when wiring the power supply. Inappropriate grounding may cause electric shock.

How should I perform refrigerant recovery work?

For the refrigerant recovery work (collection of refrigerant from the pipe to the compressor), stop the compressor before disconnecting the refrigerant pipe. If the refrigerant pipe is disconnected while the compressor is working with the valve open, the compressor sucks air and the refrigeration cycle is overpressurized, which may cause a burst or injury.

What is the usage for the accessory parts?

Part name	Q’ty	Shape	Usage
Installation Manual	2	—	(Be sure to hand over to customers)
Heat insulating pipe	2	—	For heat insulation of pipe connecting section
Installation pattern	1		For confirmation of ceiling opening and indoor unit position
Installation gauge	—		For positioning of ceiling position
Washer	4		For hanging-down unit
Eccentric washer	4		For hanging-down unit
Hose band	1		For connecting drain pipe
Flexible hose	1		For adjusting the center of drain pipe
Heat insulator	1		For heat insulation of drain connecting section
Heat insulator	1		For sealing of wire connecting port

What should I know about new refrigerant air conditioner installation?

• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY THE OZONE LAYER.
• The characteristics of R410A refrigerant are: easy to absorb water, oxidizing membrane, or oil, and its pressure is approx. 1.6 times higher than that of refrigerant R22. Accompanied by the new refrigerant, refrigerating oil has also been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigerating oil does not enter the refrigerating cycle.
• To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of the charging port of the main unit and installation tools are changed from those for the conventional refrigerant.
• Accordingly, the exclusive tools are required for the new refrigerant (R410A).
• For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust does not enter.

How do I disconnect the appliance from the main power supply?

• This appliance must be connected to the main power supply by means of a switch with a contact separation of at least 3 mm.
• The installation fuse must be used for the power supply line of this conditioner.

How should I tighten the flare nut?

Tighten the flare nut with a torque wrench in the specified manner. Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in refrigerant leakage.

What should I wear during the installation work?

Wear heavy gloves and a long sleeve shirt during the installation work to avoid injury.

What are the warnings for selecting an installation place?

• Install the air conditioner at a strong enough place to withstand the weight of the unit. If the strength is not enough, the unit may fall down resulting in injury.
• Install the air conditioner at a height 2.5m or more from the floor. If you insert your hands or others directly into the unit while the air conditioner operates, it is dangerous because you may come into contact with a revolving fan or active electricity.

What are the cautions for selecting an installation place?

• Do not install the air conditioner in a location subject to a risk of exposure to combustible gas. If combustible gas leaks and stays around the unit, a fire may occur.

What conditions must be satisfied when installing the air conditioner?

Upon approval of the customer, install the air conditioner in a place that satisfies the following conditions:

• Place where the unit can be installed horizontally.
• Place where a sufficient servicing space can be ensured for safety maintenance and check.
• Place where drained water will not cause any problem.

Where should the air conditioner be avoided to be installed?

Avoid installing in the following places:

• Place exposed to air with high salt content (seaside area), or place exposed to large quantities of sulfide gas (hot spring). (Should the unit be used in these places, special protective measures are needed.)
• A restaurant kitchen where a lot of oil is used or place near machines in a factory (Oil adhering to the heat exchanger and resin part (turbo fan) in the indoor unit may reduce the performance, generate mist or dewdrop, or deform or damage resin parts.)
• Place where an organic solvent is used nearby.
• Place close to a machine generating high frequency.
• Place where the discharged air blows directly into the window of the neighbor’s house. (Outdoor unit)
• Place where noise of the outdoor unit is easily transmitted. (When installing the outdoor unit on the boundary with the neighbor, pay due attention to the level of noise.)
• Place with poor ventilation. (Before air ducting work, check whether the value of air volume, static pressure, and duct resistance are correct.)
• Do not use the air conditioner for special purposes such as preserving food, precision instruments, or art objects, or where breeding animals or growing plants are kept. (This may degrade the quality of preserved materials.)
• Place where any of high-frequency appliances (including inverter devices, private power generators, medical equipment, and communication equipment) and inverter-type fluorescent light is installed. (A malfunction of the air conditioner, abnormal control, or problems due to noise to such appliances/equipment may occur.)
• When the wireless remote controller is used in a room equipped with an inverter-type fluorescent light or at a place exposed to direct sunlight, signals from the remote controller may not be received correctly.
• Place where an organic solvent is used.
• Place near a door or window exposed to humid outside air (Dew dropping may form.).
• Place where special spray is used frequently.

What installation space should be secured?

Secure the specified space in the figure for installation and servicing.

What should be provided when incorporating a fresh-air inlet box (sold separately)?

Provide an inspection opening at the outside-air intake box side.

What are the conditions in which dew may condense and water may drop from the indoor unit?

In case of continued operation of the indoor unit under high-humidity conditions as described below, dew may condense and water may drop.

Especially, high-humidity atmosphere (dew point temperature: 23°C or more) may generate dew inside the ceiling.

1. Unit is installed inside the ceiling with a slated roof.
2. Unit is installed at a location using inside of the ceiling as a fresh air take-in path.
3. Kitchen

What advice should be considered when selecting an installation place?

• Set a service check opening panel at the right side of the unit (size: 450 × 450mm or more) for piping, maintenance, and servicing.
• If installing a unit at such a place, put insulating material (glass wool, etc.) additionally on all the positions of the indoor unit that come to contact with a high-humidity atmosphere.

What is the requirement for when the humidity inside the ceiling seems to be higher than 80%?

When the humidity inside the ceiling seems to be higher than 80%, attach a heat insulator to the side (top) surface of the indoor unit. (Use a heat insulator that is 10mm or more thick.)

What should be considered when the height of the ceiling exceeds the distance of the item Standard/4-way in the Table on the next page?

When the height of the ceiling exceeds the distance of the item Standard/4-way in the Table on the next page, the hot air is difficult to reach the floor.

Therefore, it is necessary to change the setup value of the high ceiling switch or discharge direction.

The high-ceiling setting is also necessary when installing separately sold filters.

What are the requirements when considering the ceiling height?

• When using the air conditioner with a 2-way/3-way discharge system, a strong wind blows directly if the ceiling height is lower than the standard.

Therefore, change the setting switch according to the height of the ceiling.

• When using the high ceiling (1) or (3) with a 4-way discharge system, the draft is apt to be felt due to the drop in the discharge temperature.

• AP0092H Type and AP0122H Type air conditioners cannot be installed on a high ceiling.

What can be changed according to the installation conditions?

The lighting time of the filter sign (notification of filter cleaning) on the remote controller can be changed according to installation conditions.

What can be done when it is difficult to obtain satisfactory heating due to the location of the indoor unit or the structure of the room?

When it is difficult to obtain satisfactory heating due to the location of the indoor unit or the structure of the room, the detection temperature of heating can be raised.

What is the discharge direction?

As shown in the figure below, air discharge directions can be selected according to the shape of the room and the location of the indoor unit installation.

What should I use to change the discharge direction?

Use a shielding plate kit (sold separately) to change discharge directions. Discharge directions are limited. Follow the Installation Manual supplied with the shielding plate kit.

What is the height list of ceilings that can be installed?

Model MMU-	Discharge direction	2-way	3-way	4-way
AP0092H to AP0122H	Standard (At shipment)	2.7	2.8	3.0
	High ceiling (1)	—	—	—
	High ceiling (3)	—	—	—
AP0152H to AP0182H	Standard (At shipment)	2.8	3.2	3.5
	High ceiling (1)	3.2	3.5	3.8
	High ceiling (3)	3.5	3.8	—
AP0242H to AP0302H	Standard (At shipment)	3.0	3.3	3.6
	High ceiling (1)	3.3	3.5	3.8
	High ceiling (3)	3.6	3.8	—
AP0362H to AP0562H	Standard (At shipment)	3.9	4.2	4.5
	High ceiling (1)	4.2	4.4	4.6
	High ceiling (3)	4.5	4.6	—

Model MMU-	A mm
AP0092H Type to AP0302H Type	271 or more
AP0362H Type to AP0562H Type	334 or more

What are the requirements for installation?

Strictly comply with the following rules to prevent damage to the indoor units and human injury:

• Do not put a heavy article on the indoor unit. (Even if units are packaged)
• Carry in the indoor unit as it is packaged if possible. If carrying in the indoor unit unpacked by necessity, be sure to use a buffering cloth, etc. to not damage the unit.
• To move the indoor unit, hold the hooking metals (4 positions) only. Do not apply force to the other parts (refrigerant pipe, drain pan, foamed parts, or resin parts, etc.).
• Carry the package by two or more persons, and do not bundle it with a plastic band at positions other than specified.

What should be considered when determining the location of the indoor unit installation and orientation?

Consider the piping/wiring after the unit is hung when determining the location of the indoor unit installation and orientation.

What should I do after the location of the indoor unit installation has been determined?

After the location of the indoor unit installation has been determined, open the ceiling and install hanging bolts.

Where can the dimensions of the ceiling opening and hanging bolt pitches be found?

The dimensions of the ceiling opening and hanging bolt pitches are given in the outline drawing and the attached installation pattern.

What should be done when a ceiling already exists?

When a ceiling already exists, lay the drain pipe, refrigerant pipe, indoor unit/outdoor unit connection wires, and remote controller wires to their connection locations before hanging the indoor unit.

What needs to be procured for installing the indoor unit?

Procure hanging bolts and nuts for installing the indoor unit (these are not supplied).

Where is the installation pattern provided?

The installation pattern is provided inside the packaging cap.

How do I use the installation pattern (accessory) for an existing ceiling?

Use the installation pattern, positioning a ceiling opening and hanging bolts.

How do I use the installation pattern (accessory) for a new ceiling?

Use the installation pattern to position the ceiling opening when hanging a ceiling.

What should I do after the hanging bolts have been installed?

• After the hanging bolts have been installed, install the indoor unit.
• Hook the four holes in the installation pattern to the panel fixing screws of the indoor unit.
• When hanging a ceiling, open the ceiling along the outside dimensions of the installation pattern.

Who should I consult for details about the ceiling?

The ceiling differs according to the structure of the building. For details, consult your constructor or interior finish contractor.

What is important in the process after the ceiling board has been removed?

In the process after the ceiling board has been removed, it is important to reinforce the ceiling foundation (frame) and to keep the horizontal level of the installed ceiling correctly in order to prevent vibration of the ceiling board.

What are the steps for treating the ceiling?

1. Cut and remove the ceiling foundation.
2. Reinforce the cut surface of the ceiling foundation, and add ceiling foundation for fixing the end of the ceiling board.

What hanging bolts should be used for installation?

Use M10 hanging bolts (4 pcs, to be local procure). Matching to the existing structure, set pitch according to size in the unit external view as shown below.

How do I install the bolts on a new concrete slab?

Install the bolts with insert brackets or anchor bolts.

How do I install the bolts on a steel frame structure?

Use existing angles or install new support angles.

How do I install the bolts on an existing concrete slab?

Use a hole-in anchors, hole-in plugs, or hole-in bolts.

What should I attach to each hanging bolt?

Attach a nut (M10 or W3/8: not supplied) and the Ø34 washer (supplied) to each hanging bolt.

How do I hang the indoor unit?

Insert a washer on both sides of the T groove of the hanging bracket of the indoor unit, and hang the indoor unit.

How do I check the levelness of the indoor unit?

Check that the four sides of the indoor unit are level using a level vial (levelness: 5mm or less).

How do I check the positional relation between the indoor unit and the ceiling opening?

• Detach the installation gauge (accessory) from the installation pattern.
• Using the installation gauge, check and adjust the positional relation between the indoor unit and the ceiling opening (1) (10 to 35mm: 4 sides) and the hanging-up height (2) (mm: 4 corners). (How to use the installation gauge is printed on the gauge.)

What must I be sure to do before installation of the indoor unit?

Before installation of the indoor unit, be sure to remove the cushion for transportation between the fan and the bell mouth. Running the unit without removing the cushion may damage the fan motor.

How should I install the ceiling panel (sold separately)?

Install the ceiling panel according to the Installation Manual attached to it after the piping/wiring work has been completed. Check that the installation of the indoor unit and ceiling opening part is correct, and then install it.

What are the requirements when installing the ceiling panel?

• Joint the connecting sections of the ceiling panel, ceiling surface, ceiling panel, and the indoor unit closely. Any gap between them will cause air leakage and generate condensation or water leakage.
• Remove the adjust corner caps at the four corners of the ceiling panel, and then install the ceiling panel onto the indoor unit.
• Make sure that the claws of the four adjust corner caps are securely fit. Improper fitting of the claws may cause water leakage.

How should I install the remote controller (sold separately)?

For the installation of the wired remote controller, follow the Installation Manual attached with the remote controller.

What should I do when installing the wired remote controller?

• Pull out the remote controller cord together with the refrigerant pipe or drain pipe. Be sure to pass the remote controller cord through the upper side of the refrigerant pipe and drain pipe.
• Do not leave the remote controller at a place exposed to direct sunlight and near a stove.

What is the sensor distance for the indoor unit with the wireless remote controller?

The sensor of the indoor unit with the wireless remote controller can receive a signal by distance within approx. 7m. Based upon it, determine a place where the remote controller is operated and the installation place.

What should I do when installing the wireless remote controller?

• Operate the remote controller, confirm that the indoor unit receives a signal surely, and then install it.
• Keep 1m or more from devices such as television, stereo, etc. (Disturbance of image or noise may generate.)
• To prevent a malfunction, select a place where it is not influenced by fluorescent light or direct sunlight.

How many indoor units with a wireless type remote controller can be installed in the same room?

Two or more (Up to 6 units) indoor units with a wireless type remote controller can be installed in the same room.

How should I install the washer (accessory)?

To prevent the bolt from falling off (for safety), be sure to set it just under the hanging bracket as shown in the figure.

What are the cautions for drain piping work?

• Following the Installation Manual, perform the drain piping work so that water is properly drained, and apply heat insulation so as not to cause dew dropping. Inappropriate piping work may result in water leakage in the room and wet furniture.

What materials are required for piping and heat insulating at the site?

Piping	Heat insulating material
Hard vinyl chloride pipe VP25	Heat insulator: Foam polyethylene
	Thickness 10mm or more (covering drain hose)
	Heat-resistance temperature: 65 °C or more
	Adhesive for vinyl chloride pipe (inhibited type)

How should I use the flexible hose?

Use the attached flexible hose to adjust the center discrepancy of the hard vinyl chloride pipe or to adjust the angle.

• Do not use the flexible hose as stretched, or do not deform it more extent than that in the following figure.
• Be sure to fix the soft end of the flexible hose with the attached hose band.
• Use the flexible hose on a horizontal level.

What are the requirements for drain piping work?

• Be sure to perform heat insulation of the drain pipes of the indoor unit.
• Never forget to perform heat insulation of the connecting part with the indoor unit. An incomplete heat insulation causes dew dropping.
• Set the drain pipe with a downward slope (1/100 or more), and do not make swelling or a trap on the piping. It may cause an abnormal sound.
• For the length of the traversing drain pipe, restrict it to 20m or less. In the case of a long pipe, provide support brackets with an interval of 1.5 to 2m to prevent waving.
• Set the collective piping as shown in the below figure.
• Be sure not to apply force to the connecting part of the drain pipe.
• The hard vinyl-chloride pipe cannot be directly connected to the drain pipe connecting port of the indoor unit. For connection with the drain pipe connecting port, be sure to use/fix the attached flexible hose with the hose band, otherwise, damage or water leak is caused on the drain pipe connecting port.

How should I connect the drain pipe?

• Connect a hard socket (procured locally) to the hard socket of the attached supplied flexible hose.
• Connect a drain pipe (procured locally) to the connected hard socket.

What are the requirements when connecting the drain pipe?

• Connect hard vinyl chloride pipes securely using an adhesive for vinyl chloride to avoid water leakage.
• It takes some time until the adhesive is dried and hardened (refer to the manual of the adhesive). Do not apply stress to the joint with the drain pipe during this time period.

What are the requirements when performing drain-up piping?

• The height of the drain pipe must be 850 mm or less from the bottom of the ceiling.
• Take the drain pipe out of the drain pipe joint with the indoor unit in 300 mm or less, and bend up the pipe vertically.
• Immediately after the pipe is bent up vertically, lay the pipe making a down-gradient.
• Set downward grading immediately after raising up vertically.

What should I do when checking the draining?

In the test run, check that water drain is properly performed and water does not leak from the connecting part of the pipes. Be sure to check draining also when installed in the heating period.

What kind of wire is used for the remote controller wiring and group remote controllers wiring?

2-core with non-polarity wire is used for wiring of the remote controller wiring and group remote controllers wiring.

What precautions should be taken when wiring the remote controller wire (Communication line) and AC220–240V wires?

The remote controller wire (Communication line) and AC220–240V wires cannot be parallel to contact each other and cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise, etc.

What are the requirements for wire connection?

• Be sure to connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
• Be sure to pass the wires through the bushing of wiring connection port of the indoor unit.
• Keep a margin (Approx. 100mm) on a wire to hang down the electric parts box at servicing, etc.
• The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit).
• Make a loop on the wire for margin of the length so that the electric parts box can be taken out during servicing.

How do you connect the wires in the electrical parts box?

1. Remove the cover of the electric parts box by taking off the mounting screws (2 positions) and pushing the hooking section. (The cover of the electric parts box remains hanged to the hinge.)
2. Connect the power supply wire and remote controller wire to the terminal block of the electric parts box.
3. Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electric parts box. (Do not apply tension to the connecting section of the terminal block.)
4. Using the attached thermal insulation material, seal the pipe connecting port. Otherwise, dewing may be caused.
5. Mount the cover of the electric parts box without pinching wires. (Mount the cover after wiring on the ceiling panel.)

What is important to remember about connecting the remote controller wire to the indoor unit terminal blocks?

As the remote controller wire has non-polarity, there is no problem if connections to indoor unit terminal blocks A and B are reversed.

What are the instructions for wiring for flow selector unit (sold separately)?

Connect control wiring and power supply following figure when installing a separately sold cooling/ heating switching unit.

What are the instructions for address setup?

Set up the addresses as per the Installation Manual supplied with the outdoor unit.

What are the instructions for wiring on the ceiling panel?

According to the Installation Manual of the ceiling panel, connect the connector (20P: White) of the ceiling panel to the connector (CN510: White) on P.C. board of the electric parts box.

What is important to note about wiring between indoor and outdoor units?

An outdoor unit connected with control wiring between indoor and outdoor units wire becomes automatically the header unit.

What is the procedure for wiring between indoor units in a group control?

Connect the indoor units by connecting the remote controller inter-unit wires from the remote controller terminal blocks (A/B) of the indoor unit connected with a remote controller to the remote controller terminal blocks (A/B) of the other indoor unit. (Non-polarity)

What happens when you use this air conditioner for the first time?

When you use this air conditioner for the first time, it takes approx. 5 minutes until the remote controller becomes available after power-on. This is normal.

When should the settings of applicable controls be changed?

Change the settings while the air conditioner is not working. (Be sure to stop the air conditioner before making settings.)

What are some important facts to consider when changing the settings of the air conditioner?

• The display content for setting differs from that on the former types of remote controller (RBCAMT21E/AMT31E). (The number of CODE NO. has increased.)
• Normal settings were made when the indoor unit was shipped from factory. Change the indoor unit settings as required.
• Use the wired remote controller to change the settings.
• The settings cannot be changed using the wireless remote controller, sub remote controller, or remote-controllerless system (for central remote controller only). Therefore, install the wired remote controller to change the settings.

What is the basic procedure for changing settings using the wired remote controller?

• Procedure 1: Push TEST button and “TEMP. ” button simultaneously for at least 4 seconds. After a while, the display flashes as shown in the figure. Confirm that the CODE No. is. If the CODE No. is not, push TEST button to erase the display content, and repeat the procedure from the beginning. (No operation of the remote controller is accepted for a while after TEST button is pushed.) (While air conditioners are operated under the group control, “ ” is displayed first. When UNIT LOUVER is pushed, the indoor unit number displayed following “ ” is the header unit.)
• Procedure 2: Each time you push UNIT LOUVER button, indoor unit numbers in the control group change cyclically. Select the indoor unit you want to change settings for. The fan of the selected unit runs and the louvers start swinging. You can confirm the indoor unit for which you want to change settings.
• Procedure 3: Using “TEMP. / ” buttons, specify CODE No. [ ].
• Procedure 4: Using timer “TIME / ” buttons, select SET DATA [ ].
• Procedure 5: Push SET button. When the display changes from flashing to lit, the setup is completed. To change settings of another indoor unit, repeat from Procedure 2. To change other settings of the selected indoor unit, repeat from Procedure 3. Use SET button to clear the settings. To make settings after SET button was pushed, repeat from Procedure 2.
• Procedure 6: When settings have been completed, push TEST button to determine the settings. When TEST button is pushed, SETTING flashes and then the display content disappears and the air conditioner enters the normal stop mode. (While SETTING is flashing, no operation of the remote controller is accepted.)

What are the steps to make settings when installing separately sold filters?

Follow to the basic operation procedure (1 → 2 → 3 → 4 → 5 → 6 ).

• For the CODE No. in Procedure 3, specify [5d].
• For the set data in Procedure 4, select the SET DATA of filters to be installed from the following table:

SET DATA	High-ceiling setting
0000	Normal filter (Factory setting)
0003	High Efficiency Filter (65%) High Efficiency Filter (90%)

What are the steps for installing an indoor unit on a high ceiling?

When an indoor unit is installed on a ceiling higher than the standard height, make the high-ceiling setting for air volume adjustment.

• Take the same procedure as that in “When installing separately sold filters”.
• For the set data in Procedure 3 , specify [5d].
• Select the SET DATA for Procedure 4 from the “Height list of ceiling possible to be installed” table on page 35 in this manual.

How do you change the high-ceiling and filter settings when a wireless remote controller is used?

Change the high-ceiling and filter settings with the DIP switch on the receiver section P.C. board. For details, refer to the manual of the wireless remote controller kit. The settings can also be changed with the switch on the indoor microcomputer P.C. board. Once the setting is changed, setting to 0001 or 0003 is possible, however setting to 0000 requires a setting data change to 0000 using the wired remote controller (separately sold) with the normal switch setting (factory setting).

How do you restore the factory settings?

To return the DIP switch settings to the factory settings, set SW501-1 and SW501-2 to OFF, connect a separately sold wired remote controller, and then set the data of CODE No. [5d] to “0000” in “When installing separately sold filters” on this page.

How do you change the lighting time of the filter sign?

According to the installation condition, the lighting time of the filter sign (Notification of filter cleaning) can be changed.

Follow the basic operation procedure (1 → 2 → 3 → 4 → 5 → 6).

• For the CODE No. in Procedure 3, specify.
• For the SET DATA in Procedure 4, select the SET DATA of filter sign lighting time from the following table:

SET DATA	Filter sign lighting time	SW501-1	SW501-2
0000	None	OFF	OFF
0001	150H	ON	OFF
0002	2500H (Factory setting)	OFF	OFF
0003	5000H	OFF	ON
0004	10000H

What can you do to secure a better effect of eating?

When it is difficult to obtain satisfactory heating due to the installation place of the indoor unit or structure of the room, the detection temperature of heating can be raised. Also use a circulator, etc. to circulate heat air near the ceiling. Follow the basic operation procedure (1 → 2 → 3 → 4 → 5 → 6 ).

• For the CODE No. in Procedure 3, specify.
• For the set data in Procedure 4, select the SET DATA of shift value of detection temperature to be set up from the table below:

SET DATA	Detection temp shift value
0000	No shift
0001	+1°C
0002	+2°C (Factory setting)
0003	+3°C
0004	+4°C
0005	+5°C
0006	+6°C

How do you select horizontal wind direction?

1. Push TEST and “TEMP. ” buttons for at least four seconds when the air conditioner is not working. SETTING flashes. Indicates CODE No…
2. Select an indoor unit to be set by pushing UNIT LOUVER button (left side of the button). Indoor unit number changes each time you push the button. The fan of the selected unit runs and the louvers start swinging.
3. Change the CODE No. to with “TEMP. / ” buttons.
4. Select wind direction setting with “TIME / ” buttons.

Wind direction SET DATA	Wind direction setting
0000	Smudge reducing position (Air direction to reduce ceiling contamination) [Factory setting]
0002	Cold draft position (Air direction to control cold air fall)

5. Push SET button to check the setting. The display state changes from flashing to lighting, and the setting is fixed.
6. Push TEST button to end the setting.

What happens when the cold draft position is selected?

When the cold draft position is selected, ceiling contamination is less reduced.

How do you set up the swing type?

1. Push SWING/FIX for at least four seconds when the air conditioner is not working. SETTING flashes. Indicates CODE No. [F0].
2. Select an indoor unit to be set by pushing UNIT LOUVER (left side of the button). Each time you push the button, unit numbers change as follows: The fan of the selected unit runs and the louvers start swinging.

Swing SET DATA	Swing of louvers
0001	Standard swing (Factory setting)
0002	Dual swing
0003	Cycle swing

3. Select a swing type by pushing “TIME / ” buttons.
4. Push SET button.
5. Push TEST button to complete the setting.

What does “Dual swing” mean?

“Dual” means that louvers 01 and 03 are directed and swing in one direction and louvers 02 and 04 are directed and swing in the opposite direction. (When louvers 01 and 03 are directed downward, louvers 02 and 04 are directed horizontally.)

What does “Cycle swing” mean?

The four louvers swing independently at respective timings.

What is the precaution for setting up the swing type?

Do not set the swing SET DATA to “0000”. (This setting may cause a failure of the louvers.)

How do you set up louver lock (No swing)?

1. Push UNIT LOUVER (right side of the button) for at least four seconds when the air conditioner is not working. SETTING flashes. Indicates CODE No. [F1].
2. Select an indoor unit to be set by pushing XX (left side of the button). Each time you push the button, unit numbers change as follows: The fan of the selected unit runs and the louvers start swinging.
3. Select a louver you want to lock by pushing “TEMP. / ” buttons.
4. Select the wind direction of the louver you do not want to swing by pushing “TIME / ” buttons.
5. Determine the setting by pushing SET button. When the setting has been determined, lights up.
6. Push TEST button to complete the setting.

What may happen when wind direction (4) or (5) is selected?

When (4) or (5) is selected, dew drop may occur during cooling mode.

How do you cancel louver lock?

Set the wind direction to “0000” of the louver lock setup procedure above.

What does the temperature sensor of the indoor unit do?

The temperature sensor of the indoor unit senses room temperature usually.

How do you set the remote controller sensor to sense the temperature around the remote controller?

Select items following the basic operation procedure (1 → 2 → 3 → 4 → 5 → 6 ).

• Specify for the CODE NO. in Procedure 3.
• Select the following data for the SET DATA in Procedure 4.

SET DATA	Remote controller sensor
0000	Not used (factory setting)
0001	Used

What happens when the setting is canceled?

When the setting is canceled, goes out. Other operations are the same as those in “How to set up louver lock (No swing)”.

What is the maximum number of units that can be controlled by one remote controller in a group control?

In a group control, a remote controller can control up to maximum 8 units.

Where can you find the wiring procedure and wiring method of the individual line (Identical refrigerant line) system?

Refer to “Electric work” in this Manual.

What should you do if flashes?

When flashes, the remote controller sensor is defective. Select the SET DATA (not used) or replace the remote controller.

What precautions should you take before a test run?

Before turning on the power supply, carry out the following procedure:

1. Using 500V-megger, check that resistance of 1MΩ or more exists between the terminal block of the power supply and the earth (grounding). If resistance of less than 1MΩ is detected, do not run the unit.
2. Check the valve of the outdoor unit being opened fully.

What steps should you take to protect the compressor at activation time?

To protect the compressor at activation time, leave power-ON for 12 hours or more before operating.

Is it okay to press the electromagnetic contactor to forcibly perform a test run?

Never press the electromagnetic contactor to forcibly perform a test run. (This is very dangerous because the protective device does not work.)

What must be done before starting a test run?

Before starting a test run, be sure to set addresses following the installation manual supplied with the outdoor unit.

How do you execute a test run?

Using the remote controller, operate the unit as usual. For the procedure of the operation, refer to the attached Owner’s Manual.

How do you execute a forced test run even if the operation stops by thermo.-OFF?

A forced test run can be executed in the following procedure even if the operation stops by thermo.-OFF. In order to prevent a serial operation, the forced test run is released after 60 minutes have passed and returns to the usual operation.

In what situations should forced test runs be used?

Do not use the forced test run for cases other than the test run because it applies an excessive load to the devices.

How do you execute a test run using a wired remote controller?

• Procedure 1: Turn on the power of the air conditioner. When power is turned on for the first time after installation, it takes approx. 5 minutes until the remote controller becomes available. In the case of subsequent power-on, it takes approx. 1 minute until the remote controller becomes available. Execute a test run after the predetermined time has passed.
• Procedure 2: Push “ON/OFF” button on the remote controller, select [ COOL] or [ HEAT] with “MODE” button, and then select [ HIGH] with “FAN” button.
• Procedure 3: Keep TEST button pushed for 4 seconds or more. [TEST] is displayed on the display part and the selection of mode in the test mode is permitted.

How do you execute a test run using a wireless remote controller?

• Procedure 1: Keep TEST button pushed for 4 seconds or more. [TEST] is displayed on the display part and the selection of mode in the test mode is permitted.
• Procedure 2: Push ON / OFF button.
• Procedure 3: Using MODE button, select the operation mode, [ COOL] or [ HEAT].
• Procedure 4: Cooling test run: After confirming a signal receiving sound “beep” immediately set the temperature to 19°C with the temp. setup buttons. Heating test run: After confirming a signal receiving sound “beep” immediately set the temperature to 29°C with the temp. setup buttons.
• Procedure 5: Cooling test run: After confirming a signal receiving sound “beep” immediately set the temperature to 18°C with the temp. setup buttons. Heating test run: After confirming a signal receiving sound “beep” immediately set the temperature to 30°C with the temp. setup buttons.
• Procedure 6: Cooling test run: Set the temperature to 18°C with the temp. setup buttons. Heating test run: Set the temperature to 30°C with the temp. setup buttons.
• Procedure 7: Repeat procedures 4 → 5 → 4 → 5. Indicators “Operation” (green), “Timer” (green), and “Ready” (orange) in the wireless receiver section flash in approx. 10 seconds, and the air conditioner starts operation. If any of these indicators does not flash, repeat Procedures 3 to 5. Upon completion of the test run, push “ON/OFF” button to stop operation.

What is the overview of test run operations using the wireless remote controller?

• Cooling test run: ON/OFF → 18°C → 19°C → 18°C → 19°C → 18°C → 19°C → 18°C → (test run) → ON/OFF
• Heating test run: ON/OFF → 30°C → 29°C → 30°C → 29°C → 30°C → 29°C → 30°C → (test run) → ON/OFF

What is important to remember about the test run?

• Do not run the air conditioner in a mode other than [ COOL] or [ HEAT].
• The temperature controlling function does not work during test run.
• The detection of error is performed as usual.
• Always select [ HIGH] air volume.

How do you stop a test run in case of a wired remote controller?

After the test run, push ON / OFF button to stop a test run. (Display part is same as Procedure 1 .)

How do you cancel (release from) the test run mode in case of a wired remote controller?

Push TEST check button to cancel (release from) the test run mode. ([TEST] disappears on the display and the status returns to normal.)

What is the important safety precaution that should be taken before maintenance?

Before maintenance, be sure to turn off the leakage breaker.

When should you maintain the air filter?

If is displayed on the remote controller, maintain the air filter.

What are the consequences of a clogged air filter?

Clogging of the air filter reduce cooling/heating performance.

How do you clean the panel and air filter?

• Preparation:

  1. Turn off the air conditioner by the remote controller.
  2. Open the suction grille. Slide the button of the suction grille inward, and open the suction grille slowly while holding it.

• Cleaning:

  • Wipe down the panel and air filter with a sponge or towel moistened with a kitchen detergent. (Do not use any metallic brush for cleaning.)
  • Carefully rinse the panel and air filter to wash out the detergent.
  • After rinsing the panel and air filter with water, dry it in the shade.

• Completion:

  1. Close the suction grille. Close the suction grille, slide the knob outward, and fix the suction grille securely.

How do you clean the air filters?

• Preparation:

  1. Stop the operation by remote controller.
  2. Dismount the air filter.

• Cleaning:

  • Use a vacuum cleaner to remove dust from the filters or wash them with water.
  • After rinsing the air filters with water, dry them in the shade.

• Completion:

  1. Set the air filter into the air conditioner.
  2. Push FILTER RESET button. “FILTER ” disappears.

What are the important precautions to take when cleaning the air filters?

• If the air filters are not cleaned, it not only reduces the cooling performance of air conditioner but causes a failure in the air conditioner such as water falling in drops.
• Do not start the air conditioner while leaving the panel and air filter removed.
• Push the filter reset button. ( indication will be turn off.)

How do you clean the discharge louver?

The discharge louver can be removed to clean.

1. Remove the discharge louver: Holding the both ends of the discharge louver, remove the louver sagging the center downward.
2. Cleaning with water: If the dirt is terrible, clean the louver by tepid water with neutral detergent or water.
3. Mount the discharge louver: First push in one side of the louver, and then insert the other side sagging the center downward. Be careful to the direction of the louver when mounting. Mount the louver so that the side with the mark faces upward and the arrow direction of the mark directs.

What are the precautions to take when cleaning the heat exchanger?

Be sure to clean the heat exchanger with pressurized water. If a commercially available detergent (strong alkaline or acid) cleaning agent is used, the surface treatment of the heat exchanger will be marred, which may degrade the self cleaning performance. For details, contact the dealer.

How often should the indoor and outdoor units of the air conditioner be cleaned?

For environmental conservation, it is strongly recommended that the indoor and outdoor units of the air conditioner in use be cleaned periodically during the operation of the air conditioner.

What are the recommended maintenance intervals for the air conditioner?

• When the air conditioner is operated for a long time, periodic maintenance (once a year) is recommended. Furthermore, regularly check the outdoor unit for rust and scratches, and remove them or apply rustproof treatment, if necessary.
• As a general rule, when an indoor unit is operated for 8 hours or more daily, clean the indoor unit and outdoor unit at least once every 3 months. Ask a professional for this cleaning/ maintenance work. Such maintenance can extend the life of the product though it involves the owner’s expense.

What are the consequences of failing to clean the indoor and outdoor units regularly?

Failure to clean the indoor and outdoor units regularly will result in poor performance, freezing, water leakage, and even compressor failure.

What should you do to maintain the drain pump?

This product incorporates a drain pump. If it is used in a place full of dust or oil mist, the pump will be clogged and proper drainage is disabled. Clean the drain pump periodically. For how to clean the drain pump, contact the dealer.

What should be checked for each part of the air conditioner during maintenance?

Part	Check (visual/auditory)	Maintenance
Heat exchanger	* Dust/dirt clogging, scratches	* Wash the heat exchanger when it is clogged.
	* Sound	* Take appropriate measures when abnormal sound is generated.
Fan motor	* Dust/dirt, breakage	* Wash the filter with water when it is contaminated.
		* Replace it when it is damaged.
Filter	* Vibration, balance	* Replace the fan when vibration or balance is terrible.
Fan	* Dust/dirt, appearance	* Brush or wash the fan when it is contaminated.
Air inlet/outlet grilles	* Dust/dirt, scratches	* Fix or replace them when they are deformed or damaged.
Drain pan	* Dust/dirt clogging, drain contamination	* Clean the drain pan and check the downward slope for smooth drainage.
Ornamental panel, louvers	* Dust/dirt, scratches	* Wash them when they are contaminated or apply repair coating.

When a trouble occurred in the air conditioner, where do the check code and the indoor unit No. appear?

When a trouble occurred in the air conditioner, the check code and the indoor unit No. appear on the display part of the remote controller.

When is the check code displayed?

The check code is only displayed during the operation.

What should you do if the display disappears?

If the display disappears, operate the air conditioner according to the following “Confirmation of error history” for confirmation.

How do you confirm the error history?

When a trouble occurred on the air conditioner, the trouble history can be confirmed with the following procedure. (The trouble history is stored in memory up to 4 troubles.) The history can be confirmed from both operating status and stop status.

• Procedure 1: When pushing SET and TEST buttons at the same time for 4 seconds or more, the following display appears. If [ Service check] is displayed, the mode enters in the trouble history mode. [01 : Order of trouble history] is displayed in CODE No. window. [Check code] is displayed in CHECK window. [Indoor unit address in which an error occurred] is displayed in Unit No.
• Procedure 2: Every pushing of “ / TEMP.” button used to set temperature, the trouble history stored in memory is displayed in order. The numbers in CODE No. indicate CODE No. (latest) → (oldest).
• Procedure 3: After confirmation, push TEST button to return to the usual display.

Why should you not push the CL button when confirming the error history?

Do not push CL button because all the trouble history of the indoor unit will be deleted.

How do you use the self-diagnosis function to find a trouble or position with an error in the air conditioner?

On the remote controller (Main remote controller, Central control remote controller) and the interface P.C. board of the outdoor unit (I/F), a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C. board) to display the operation is provided. Therefore the operation status can be known. Using this self-diagnosis function, a trouble or position with error of the air conditioner can be found as shown in the table below.

How do you use the check code list to find the check contents?

The following list shows each check code. Find the check contents from the list according to part to be checked.

• In case of check from indoor remote controller: See “Main remote controller display” in the list.
• In case of check from outdoor unit: See “Outdoor 7-segment display” in the list.
• In case of check from AI-NET central control remote controller: See “AI-NET central control display” in the list.
• In case of check from indoor unit with a wireless remote controller: See “Sensor block display of receiving unit” in the list.

AI-NET : Artificial Intelligence, IPDU : Intelligent Power Drive Unit : Lighting, ¤ : Flashing, : Goes off ALT : Flashing is alternately when there are two flashing LED., SIM : Simultaneous flashing when there are two flashing LED.

Check code	Main remote controller display	Outdoor 7-segment display	Auxiliary code	AI-NET central control display	Wireless remote controller Sensor block display of receiving unit	Check code name	Judging device
E01			—	—	Operation Timer Ready Flash ¤  	Communication error between indoor and remote controller (Detected at remote controller side)	Remote controller
E02			—	—	Operation Timer Ready Flash ¤  	Remote controller transmission error	Remote controller
E03			—	97	Operation Timer Ready Flash ¤  	Communication error between indoor and remote controller (Detected at indoor side)	Indoor
E04			—	04	Operation Timer Ready Flash   ¤	Communication circuit error between indoor/outdoor (Detected at indoor side)	Indoor
E06	—	E06	No. of indoor units in which sensor has been normally received	04	Operation Timer Ready Flash   ¤	Decrease of No. of indoor units	I/F
E08	E08	E07	—	—	Operation Timer Ready Flash   ¤	Communication circuit error between indoor/outdoor (Detected at outdoor side)	I/F
E09	E09	E08	Duplicated indoor addresses	96	Operation Timer Ready Flash ¤ ¤ 	Duplicated indoor addresses	Indoor / I/F
E10	E10	—	—	99	Operation Timer Ready Flash   ¤	Duplicated main remote controllers	Remote controller
E12	E12	—	—	CF	Operation Timer Ready Flash ¤  	Communication error between indoor MCU	Indoor
E15	E15	E12	01: Indoor/Outdoor communication 02: Communication between outdoor units	42	Operation Timer Ready Flash ¤  	Automatic address start error	I/F
E16	E16	—	—	42	Operation Timer Ready Flash ¤  	Indoor is nothing during automatic addressing	I/F
E18		E19	00: Header is nothing 02: Two or more header units	89	Operation Timer Ready Flash   ¤	Capacity over / No. of connected indoor units	I/F
E19	E19	E20	01: Outdoor of other line connected 02: Indoor of other line connected	97, 99	¤ 

What are the functions of the Pulse Motor Valve (PMV)?

1. Controls superheat in cooling operation.
2. Controls undercool in heating operation.
3. Recovers refrigerant oil in cooling operation.
4. Recovers refrigerant oil in heating operation.

What does Temp. Sensor TA detect?

Detects indoor suction temperature.

What does Temp. Sensor TC1 control?

Controls PMV superheat in cooling operation.

What does Temp. Sensor TC2 control?

Controls PMV undercool in heating operation.

What does Temp. Sensor TCJ control?

Controls PMV superheat in cooling operation.

What is the distinction of the outdoor unit?

When the power supply is reset, the outdoors are distinguished, and the control is selected according to the distinguished result.

What happens with the indoor fan speed and existence of air direction adjustment?

Based on EEPROM data, the setting of the indoor fan speed and the existence of air direction adjustment are selected.

What happens if the power supply is reset during the occurrence of a trouble?

If resetting the power supply during the occurrence of a trouble, the check code is once cleared. After ON/OFF button of the remote controller was pushed and the operation was resumed, if the abnormal status continues, the check code is again displayed on the remote controller.

What happens when the STOP command is sent from the remote controller?

The air conditioner stops.

What happens when the FAN command is sent from the remote controller?

Fan operation is selected.

What happens when the COOL command is sent from the remote controller?

Cooling operation is selected.

What happens when the DRY command is sent from the remote controller?

Dry operation is selected.

What happens when the HEAT command is sent from the remote controller?

Heating operation is selected.

What happens when the AUTO command is sent from the remote controller?

Ta and Ts automatically select COOL/HEAT operation mode for operation.

• The operation is performed as shown in the following figure according to Ta value at the first time only. (In the range of Ts – 1 < Ta < Ts + 1, Cooling thermo. OFF (Fan) / Setup air volume operation continues.)

Can the automatic mode be selected on a Super Heat Recovery Multi (SHRM)?

No. While a wireless remote controller is used, the mode is notified by “Pi Pi” (two times) receiving sound and the alternate flashing of [TIMER] and [READY]. To clear the alternate flashing, change the mode on the wireless remote controller.

What is the adjustment range for room temperature?

Remote controller setup temperature (°C).

What is the setup temperature range in COOL/DRY mode for wired and wireless type remote controllers?

Remote Controller Type	COOL/DRY Temperature Range (°C)
Wired	18 to 29
Wireless	18 to 30

What is the setup temperature range in HEAT mode for wired and wireless type remote controllers?

Remote Controller Type	HEAT Temperature Range (°C)
Wired	18 to 29
Wireless	16 to 30

What is the setup temperature range in AUTO mode for a SHRM?

Remote Controller Type	AUTO Temperature Range (°C)
Wired	18 to 29
Wireless	17 to 27

How can the setup temperature in heating operation be corrected?

Use Item code 06 to correct the setup temperature in heating operation.

When does the shift of suction temperature in heating operation occur?

The shift occurs except while the sensor of the remote controller is controlled (Code No. , “0001”).

What are the setup data values and their corresponding setup temperature corrections?

Setup Data	Setup Temperature Correction
0	+0°C
2	+2°C
4	+4°C
6	+6°C

How is the operation capacity determined?

Based on the difference between Ta and Ts, the operation capacity is determined by the outdoor unit.

How is the judgment of selecting COOL/HEAT carried out?

1. When +1.5 exceeds against Tsh for 10 minutes and after thermo.-OFF, heating operation (Thermo. OFF) exchanges to cooling operation. Description in the parentheses shows an example of cooling ON/OFF.
2. When -1.5 lowers against Tsc for 10 minutes and after thermo. OFF, cooling operation (Thermo. OFF) exchanges to heating operation.

Where can I find information about automatic capacity control after judgment of cooling/heating?

See Item 4.

Where can I find information about temperature correction of room temp. control in automatic heating?

See Item 3.

How does air speed selection work in (HH), (H), (L), or [AUTO] mode?

Operation is carried out by the command from the remote controller.

How does the air speed vary in [AUTO] mode?

The air speed varies by the difference between Ta and Ts.

What is the air speed control outline in COOL mode?

• HH > H+ > H > L+ > L > UL
• Controlling operation in case when the thermostat of the remote controller works is the same as a case when the thermostat of the body works.
• If the air speed has been changed once, it is not changed for 3 minutes. However, when the air volume is exchanged, the air speed changes.
• When cooling operation has started, select a downward slope for the air speed, that is, the high position.
• If the temperature is just on the difference boundary, the air speed does not change.

What is the air speed control outline in HEAT mode?

• The value in the parentheses indicates one when the thermostat of the remote controller works. The value without parentheses indicates one when the thermostat of the body works.
• If the air speed has been changed once, it is not changed for 1 minute. However, when the air speed is exchanged, the air speed changes.
• When heating operation has started, select an upward slope for the air speed, that is, the high position.
• If the temperature is just on the difference boundary, the air speed does not change.
• In Tc2 ≥ 60°C, the air speed increases by 1 step.

What are the air speeds for different temperature differences in COOL mode?

Ta (°C)	Air Speed
+3.0	HH <HH>
+2.5	H+ <HH>
+2.0	H <HH>
+1.5	L+ <H+>
+1.0	L <H>
+0.5	L <H>
Tsc	L <L+>
-0.5
< > : Indicate automatic cooling.

What are the air speeds for different temperature differences in HEAT mode?

Ta (°C)	Air Speed
(-0.5) -1.0	L <L+>
(0) Tsh	L+ <H>
(+0.5) +1.0	H <H+>
(+1.0) +2.0	HH <HH>
(+1.5) +3.0	H+ <HH>
(+2.0) +4.0
Body thermostat works.
Remote controller thermostat works.
< > : Indicate automatic heating.

What does code No. 32 indicate?

Code No. 32	Description
0000	Body thermo. (Main unit)
0001	Remote controller thermo.

What does Tc2 represent?

Indoor heat exchanger sensor temperature.

What happens to the air speed selection in heating operation for a 4-way Discharge Cassette type?

The mode changes to [LL] if the thermostat is turned off.

How is the upper limit of the fan tap set in heating operation for a 4-way Discharge Cassette type?

The higher temperature of the TC2 sensor and TCJ sensor is compared with the temperature of the TC1 sensor, and then the lower temperature is used to set the upper limit of the fan tap.

What are the conditions and characteristics of the different zones in heating operation for a 4-way Discharge Cassette type?

• When B zone has continued for 6 minutes, the operation shifts to C zone.
• In defrost time, the control point is set to +6°C.
• In D and E zones, priority is given to remote controller air speed setup.
• In A zone “ ” is displayed.

What does TCJ represent?

Temperature of the indoor heat exchanger sensor.

What are the temperature ranges and corresponding fan taps for different types in heating operation for a 4-way Discharge Cassette type?

Code No. [5d]	SW501 (1)/(2)	Tap	F1	F2	F3	F4	F5	F6	F7	F8	F9	FA	FB	FC	FD
Standard	OFF/OFF	HEAT	H	H	H	H	H	H	H	H	H	H	H	H	H
Type 1	ON/OFF	COOL	H	H	H	H
		HEAT	H	H	H	H	H	H
Type 3	OFF/ON	COOL	H+	H+	H+	H+	H+	H+	L+	L+	L
		HEAT	H+	H+	L	L
Type 6	ON/ON	COOL	H	L+	L
		HEAT	H	L+	L	L	L	L	L	L	L	L	L	L	L

What is the freeze prevention control outline in cooling operation based on the temperature detected by TC1, TC2, and TCJ sensors?

1. When “J” zone is detected for 5 minutes, the thermostat is forcedly off.
2. In “K” zone, the timer count is interrupted and held.
3. When “I” zone is detected, the timer is cleared, and the operation returns to the normal operation.
4. If “J” zone continues, the operation of the indoor fan in LOW mode continues until it reaches the “I” zone. It is reset when the following conditions are satisfied:

What are the reset conditions for freeze prevention control?

1. TC1 > 12°C and TC2 > 12°C and TCJ > 12°C.
2. 20 minutes passed after stop.

What does TC1 represent?

Temperature of indoor heat exchanger sensor.

What is the freeze prevention control outline in cooling operation based on the temperature detected by TC2 and TCJ sensors?

1. When “M” zone is detected for 45 minutes, the thermostat is forcedly off.
2. In “N” zone, the timer count is interrupted and held.
3. When shifting to “M” zone again, the timer count restarts and continues.
4. If “L” zone is detected, the timer is cleared and the operation returns to normal operation.

What are the temperature values for P1, Q1, P2, and Q2 in freeze prevention control?

Parameter	Value
P1	TC1: 10°C (5°C)
Q1	TC2, TCJ: –10°C
P2	TC2, TCJ: 5°C
Q2	TC2, TCJ: –2.0°C
( ) value	When the power supply is turned on, the
	Forced thermo becomes OFF if the
	temperature is less than this indicated
	temperature.
*	In a Model without TC2, TC2 is not judged.

What is the recovery control for cooling oil (refrigerant)?

The indoor unit that is under STOP/Thermo-OFF status or that operates in [FAN] mode performs the following controls when it received the cooling oil (refrigerant) recovery signal from the outdoor unit:

1. Opens PMV of the indoor unit with a constant opening degree.
2. Operates the drain pump for approx. 1 minute during recovery control and after the finish of control.

How often is the recovery operation performed?

Usually every 2 hours.

What is the recovery control for heating refrigerant (oil)?

The indoor unit that is under STOP/Thermo-OFF status or that operates in [FAN] mode performs the following controls when it received the heating refrigerant (oil) recovery signal from the outdoor unit:

1. Opens PMV of the indoor unit with a constant opening degree.
2. Detects temperature of TC2 and then closes PMV.
3. Counts No. of recovery controls and operates the indoor fan and the drain pump for approx. 1 minute after the finish of recovery control until the control count reaches the specified count.

What happens to the indoor unit that is under thermo-OFF (COOL) status or operates in [FAN] mode during heating refrigerant recovery control?

The indoor unit stops the indoor fan and displays [READY].

How often is the heating refrigerant recovery operation performed?

Usually every 1 hour.

What is the compensation control for short intermittent operation?

For 3 minutes after the start of operation, the operation is forcedly continued even if the unit enters the Thermo-OFF condition.

What are the exceptions to the compensation control for short intermittent operation?

However, the thermostat is OFF giving prior to COOL/HEAT selection, READY for operation, and protective control.

What is the drain pump control outline in cooling operation?

1. This control operates the drain pump anytime in cooling operation (including DRY operation).
2. During operation of the drain pump, if the float switch operates, the drain pump continuously operates, and a check code is issued.
3. During the stop status of the drain pump, if the float switch operates, the thermostat is forcedly off, and this control operates the drain pump. After continuous operation of the float switch for approx. 5 minutes, this control stops the operation, and a check code is issued.

What is the elimination of retained heat control outline?

When the unit stopped from [HEAT] operation, the indoor fan operates with [L] for approx. 30 seconds.

What is the HA control outline?

1. ON/OFF operation is available by input of HA signal from the remote site when connected to the remote controller or the remote ON/OFF interface.
2. HA control outputs ON/OFF status to HA terminal.
3. The I/O specifications of HA conform to the JEMA standard.

What is the check code when using the HA terminal (CN61) for the remote ON/OFF?

Check Code [P10].

What is required when using the HA terminal (CN61) for the remote ON/OFF?

When using the HA terminal (CN61) for the remote ON/OFF, a connector sold separately is necessary. In the case of group operation, use the connector to connect the HA terminal to either master or follower indoor unit.

What is the filter sign display control outline?

1. The filter sign is displayed with LC by sending the filter-reset signal to the remote controller when the specified time (150H/2500H) elapsed as a result of the integration of the operation time of the indoor fan.
2. The integrated timer is cleared when the filter-reset signal is received from the remote controller. At this time, if the specified time elapsed, the counted time is reset, and the LC display is deleted.

What happens when the filter time reaches 2500H?

[FILTER] goes on.

When is [READY] displayed on the remote controller?

1. When the following check codes are indicated:
   • Open phase of power supply wiring [P05] was detected.
   • There is an indoor unit that detected the indoor overflow [P10].
   • There is an indoor unit that detected the interlock alarm [L30].
2. During Force Thermo-OFF:
   • [COOL/DRY] operation is unavailable because the other indoor unit operates with [HEAT] mode.
   • [HEAT] operation is unavailable because COOL priority (SW11-bit1 of the Outdoor I/F P.C. board is ON) is set, and the other indoor unit operates with [COOL/DRY] mode.
3. The above indoor units that cannot operate stay in Thermo-OFF status.
4. The indoor fan stops because the system performs [Recovery operation for heating refrigerant (Oil)].

When is [HEAT READY] displayed on the remote controller?

The indoor fan stops to prevent the discharge of cool air when heating operation started or during heating operation. (including the defrost operation during thermo-OFF).

Is it possible to select the contents that can be operated by the remote controller at the indoor unit side?

Yes, the selection of the contents that can be operated by the remote controller at the indoor unit side is possible according to the setting at the central controller side.

What are the setting contents for the remote controller?

• < READY > display: No display for the wireless type remote controller.
• < HEAT READY > display.
• In the case of a wired remote controller type, [Central control] display (Goes on) in the central control mode.

What are the operation possibilities for AI-NET central control and TCC-LINK central control?

Operation	AI-NET Central Control	TCC-LINK Central Control
ON/OFF setting	✓	✓
Operation mode selection	✓	✓
Timer setting	✓	✓
Temp. setting	✓	✓
Air speed setting	✓	✓
Air direction setting	✓	✓
After-push priority (AI-NET only)	×
Center (AI-NET only)	✓
Operation prohibited (AI-NET only)	×
On RBC-AMT32E [Center controlling] display
Individual (TCC-LINK only)		✓
Central 1 (TCC-LINK only)		×
Central 2 (TCC-LINK only)		×
Central 3 (TCC-LINK only)		×
Central 4 (TCC-LINK only)		×
On RBC-AMT32E [Central control] display
✓: Operation possible
×: Operation impossible

What happens when an item of the operation prohibited was changed on the remote controller during AI-NET central control?

The display flashes.

How is the operation from the wireless remote controller in the central control mode notified?

The operation from the wireless remote controller in the central control mode is notified with the receiving sound, Pi, Pi, Pi, Pi, Pi (5 times).

What happens if the operation select modes are different in the central 2 to 4 from those at the central controller side during TCC-LINK central control?

The operations Temp. Setting, air volume setting, and air direction setting are inoperable.

What are the louver position setup guidelines for a 4-way Discharge Cassette type?

• When the louver position is changed, the position moves necessarily to the downward discharge position once to return to the set position.
• The louver position can be set up in the following operation range.

What is the difference in the louver position at the horizontal discharge position between under AP030 and over AP036?

The louver position at the horizontal discharge position at under AP030 differs from that at over AP036.

Can the louver positions be set up collectively or individually in group twin/triple operation?

Yes, in group twin/triple operation, the louver positions can be set up collectively or individually.

What happens to the louver position in case that HEAT refrigerant recovery control was performed in STOP status?

The louver position becomes horizontal when the operation is resumed.

What happens during the swing setup?

• [SWING] is displayed, and the following display is repeated.
• (Repeats).

Can the louver positions be set up collectively or individually in group operation?

Yes, in group operation, the louver positions can be set up collectively or individually.

What happens to the louver when the unit stopped or the warning was output?

The louver is automatically set to the full closed position.

What happens to the louver when PRE-HEAT (Heating ready) is displayed, heating thermo is off, or self-cleaning is performed?

The louver is automatically set to the horizontal discharge position.

What happens to the louver which air direction is individually set or the locked louver when the unit stops?

The louver closes fully.

What happens to the louver which air direction is individually set or the locked louver when PRE-HEAT (Heating ready) is displayed or heating thermo is off?

The louver is automatically set to the horizontal discharge position.

How do you set up the individual air direction?

Pushing UNIT LOUVER Louver select button enables every discharge port to set up the air direction. The louver numbers that are displayed on the display part correspond to those in the following figure.

What happens in case of no input (key operation) for approx. 5 seconds during the setting of individual air direction?

In the case of no input (key operation) for approx. 5 seconds during the setting of individual air direction (during the displaying of louver No. on the remote controller screen), the remote controller screen returns to the normal display screen.

Which air direction is displayed during normal operation for the air direction illustration?

The air direction of the least No. among the louvers which are block-set is displayed.

Are the remote controller operation and the operation of the real machine linked while the individual air direction is being set?

Yes, while the individual air direction is being set, the remote controller operation (Illustration of air direction) and the operation of the real machine are linked.

What happens when selecting a case where the UNIT LOUVER Louver select button is not pushed or louver No. is not displayed?

The air directions of all the louvers are collectively set up.

How does the swinging louver move?

The swinging louver moves usually up to the ceiling side from the louver position of the set time.

Is setup from the remote controller without the UNIT LOUVER button available?

No, setup from the remote controller without the UNIT LOUVER button is unavailable.

Where can I find information on the setup operation for the louver?

Refer to “How to set up the louver individually” of Item “Setup at local site/Others”.

What swing modes are available for selection?

For the Swing mode, the following three types of modes are selectable and settable by keeping Swing/Direction SWING/FIX button pushed for 4 seconds or more on the remote controller:

1. Standard (4 pieces: same phase) swing → Data: [0001 (At shipment)]. When Swing operation is selected, four louvers align at the horizontal discharge position and then start the Swing operation at the same time.
2. Dual swing → Data: . When operation is selected, the louvers of louver No. \ and \ move to the horizontal discharge position, the louvers of louver No. \ and \ move to the downward discharge position and then start the Swing operation at the same time.
3. Cycle swing → Data: . When operation is selected, the louver No. \ moves to the horizontal discharge position, \ to the downward discharge position, \ and \ to the middle position and then start the Swing operation at the same time.

Can the three types of swing modes be selected and set by the setup data?

Yes, three types of the swing modes can also be selected and set by the setup data of Item code (DN) [F0].

What happens when selecting the Swing mode, “Dual swing” or “Cycle swing”?

The following numerals is displayed at the center of the remote controller screen for approx. 3 seconds when SWING/FIX button was pushed to select [SWING]. (No display for the standard swing).

Can the mode be moved to the select mode on the remote controller before the wired remote controller (RBC-AMT32E) by pushing the SWING/FIX button for a long time?

No.

When should the setting operation for Swing mode be carried out?

Carry out setting operation during the stop of the unit; otherwise, the unit stops operation.

What swing operation does the standard swing perform?

The standard swing performs the same swing operation as the present operation (2 series).

Where can I find information on how to set up the type of swings?

Refer to [How to set up a type of the swings] in Item “Setup at local site/Others”.

Is flashing showing the Swing mode indicated on the remote controller before the wired remote controller (RBC-AMT32E)?

No.

Can the louver position be locked during normal operation for the air direction setup for each discharge port?

Yes.

How can an arbitrary air direction of an arbitrary louver be registered and set?

An arbitrary air direction of an arbitrary louver can be registered and set by keeping the UNIT LOUVER button pushed for 4 seconds or more on the remote controller.

How can the louver lock be set?

The louver lock can be set by registering the setup data to Item code (DN) [F1] to [F4] according to the following table.

Is the UNIT LOUVER button provided on the remote controller before the wired remote controller (RBC-AMT32E)?

No.

When should the setting operation for louver lock be carried out?

Carry out the setting operation during the stop of the unit; otherwise, the unit stops operation.

What are the setup data values and their corresponding objective louver No.?

Item Code	Objective Louver No.	Setup Data
F1	01	0000: Release (At shipment)
		0001: Horizontal discharge position
		~ 0005: Downward discharge position
F2	02	0000: Release (At shipment)
		0001: Horizontal discharge position
		~ 0005: Downward discharge position
F3	03	0000: Release (At shipment)
		0001: Horizontal discharge position
		~ 0005: Downward discharge position
F4	04	0000: Release (At shipment)
		0001: Horizontal discharge position
		~ 0005: Downward discharge position

How to set louver lock?

For the setting operation, refer to [How to set louver lock] of Installation Manual.

What happens if there is a locked louver in the unit?

[ ] goes on the remote controller screen.

What happens when the following controls are performed?

The louvers operate even if executing the louver lock.

• Operation stop
• When heating operation started
• Heating thermo. OFF
• During defrost operation
• Initialize operation

What is the objective louver No. when the controls are performed?

• Horizontal discharge position
• Horizontal discharge position
• Horizontal discharge position
• Horizontal discharge position
• Full-close position

What happens during position check operation?

It does not link with the real louver and air direction setup (Illustration on the remote controller screen).

What happens when the fan stator, starter and the rotor are positioned?

The DC motor vibrates slightly.

How does the DC motor operate?

According to the command from the indoor controller.

What might happen if the fan rotates by entry of outside air, etc while the air conditioner stopped?

The indoor unit may operate as the fan motor stops.

What happens if the fan lock was detected?

The operation of the indoor unit stops and the error is displayed. Check code [P12]

Is the function [Save operation] provided to the Super Modular Multi series models?

No, the function [Save operation] is not provided to the Super Modular Multi series models.

What happens if the [SAVE] button “ ” on the remote controller is pushed?

“No function” is displayed.

What is the maximum number of units connectable to the wired remote controller?

Max. 8 units are connectable.

What is the maximum number of units connectable if the network adaptor is installed when 2 remote controllers are connected?

Maximum 7 units are connectable.

Can the network adaptor be installed to multiple units?

No, the network adaptor is installed to only one unit.

Can the weekly timer be connected to the simple wired remote controller?

No, the weekly timer cannot be connected to the simple wired remote controller.

What is the maximum number of units connectable to the wireless remote controller kit?

Max. 8 units are connectable.

What is the maximum number of units connectable if the network adaptor is installed when 2 wireless remote controller kits are connected?

Maximum 7 units are connectable.

What is the maximum number of units connectable when connecting both wired remote controller and wireless remote controller kit?

Max. 8 units are connectable.

Is the weekly timer able to be connected to the simple wired remote controller when connecting both a wired remote controller and wireless remote controller kit?

No, the weekly timer cannot be connected to the simple wired remote controller.

What is the first step to push the [TEST] button for 4 seconds or more?

Push [TEST] button for 4 seconds or more.

What happens when the [TEST] button is pushed for 4 seconds or more?

[TEST] is displayed at the display part and the mode enters in TEST mode.

What is the next step after pushing the [TEST] button for 4 seconds or more?

Push [ON/OFF] button.

What is the next step after pushing the [ON/OFF] button?

Change the mode from [COOL] to [HEAT] using [MODE] button.

What buttons should not be used during the test run?

Do not use [MODE] button for other mode except [COOL]/[HEAT] modes.

Can the temperature be adjusted during the test run?

No, the temperature cannot be adjusted during test run.

Is error detection performed during the test run?

Yes, the error detection is performed as usual.

What should be done after the test run?

After test run, push [ON/OFF] button to stop the operation. (Display on the display part is same to that in Procedure 1 .)

How do you clear the TEST mode?

Push [TEST] button to clear the TEST mode. ([TEST] display in the display part disappears and status becomes the normal stop status.)

Can the test run for cooling/heating be performed from either indoor remote controller or outdoor interface P.C. board?

Yes, the test run for cooling/heating can be performed from either indoor remote controller or outdoor interface P.C. board.

How do you perform the test run from the indoor remote controller?

Wired remote controller: Refer to the below item of “Test run” of the wired remote controller. Wireless remote controller: Refer to the next page item of “Test run” of the wireless remote controller.

How long will the test run take before returning to normal operation when using the wired remote controller?

60 minutes

What is the first step when performing the test run with the wireless remote controller?

Push [ON/OFF] button on the remote controller.

What is the second step when performing the test run with the wireless remote controller?

Change the operation mode to [COOL] or [HEAT] using [MODE] button and then select the air speed [ H] using [FAN]. Test run for cooling operation Test run for heating operation Set [18°C] using [Temperature set] button. Set [30°C] using [Temperature set] button.

What is the third step when performing the test run with the wireless remote controller?

Set [19°C] using [Temperature set] button immediately after confirmation of the receiving sound “Pi”. Set [29°C] using [Temperature set] button immediately after confirmation of the receiving sound “Pi”.

What is the fourth step when performing the test run with the wireless remote controller?

Set [18°C] using [Temperature set] button immediately after confirmation of the receiving sound “Pi”. Set [30°C] using [Temperature set] button immediately after confirmation of the receiving sound “Pi”.

What is the fifth step when performing the test run with the wireless remote controller?

Next carry out the procedures 3 → 4 → 3 → 4 .

What is the sixth step when performing the test run with the wireless remote controller?

After approx. 10 seconds, all the indication lamps on the receiving part of the wireless remote controller [ON], [TIMER] and [Ready] flash and start the operation. Repeat operation of procedure 2 and after if the lamps do not flash.

What should be done after the test run when using the wireless remote controller?

After the test run, push [ON/OFF] button to stop the operation.

What is the outline of the test run from the wireless remote controller for both the cooling and heating operation?

Test run for cooling operation: ON/OFF → 18°C → 19°C → 18°C → 19°C → 18°C → 19°C → 18°C → (Test run) → ON/OFF Test run for heating operation: ON/OFF → 30°C → 29°C → 30°C → 29°C → 30°C → 29°C → 30°C → (Test run) → ON/OFF

How long will the test run take before returning to normal operation when using the wireless remote controller?

60 minutes

What air volume should always be selected when performing the test run with the wireless remote controller?

Always select [ HIGH] air volume.

What is the check function for the operation of the indoor unit?

(Functions at indoor unit side) This function is provided to check the operation of the indoor unit singly without communication with the remote controller or the outdoor unit. This function can be used regardless of operation or stop of the system.

What could happen if the check function for operation of the indoor unit is used for a long time?

A trouble of the equipment may be caused. Limit using this function within several minutes.

How do you operate the check function for operation of the indoor unit?

1. Short-circuit CHK pin (CN71 on the indoor P.C. board). The operation mode differs according to the indoor unit status in that time. Normal time: Both float SW and fan motor are normal. Abnormal time: Either one of float SW or fan motor is abnormal.
2. Restricted to the normal time, if short-circuiting DISP pin (CN72 on the indoor P.C. board) in addition to short-circuit of CHK pin (CN71 on the indoor P.C. board), the minimum opening degree (30pls) can be set to the indoor PMV only.

What happens when you open DISP pin when using the check function for operation of the indoor unit?

The maximum opening degree (1500pls) can be obtained again.

How do you clear the check function for operation of the indoor unit?

Open CHK pin. While the system is operating, it stops once but automatically returns to operation after several minutes.

Short-circuit of CHK pin	Normal time	Abnormal time	DISP pin open	DISP pin short circuit
Fan motor	(H)	(H)	Stop	Stop
Indoor PMV (∗)	Max. opening degree (1500pls)	Min. opening degree (30pls)	Min. opening degree (30pls)	Min. opening degree (30pls)
Louver	Horizontal	Horizontal	Immediate stop	Immediate stop
Drain pump	ON	ON	ON	ON
Communication	All ignored	All ignored	All ignored	All ignored
P.C. board LED	Lights	Lights	Flashes	Flashes

What should you do to exchange the indoor PMV coil?

Set the indoor PMV to Max. opening degree.

Where can you find the detailed positions of CHK pin (CN71 on indoor P.C. board) and DISP pin (CN72 on indoor P.C. board)?

Refer to the indoor P.C. board MCC-1570.

Function	Connector No.	Pin No.	Specifications	Remarks
—	CN66	—	—	—
Fan output	CN32		DC12V	Output
HA	CN61		ON/OFF input	Shipment setup: ON with indoor unit operation and OFF with stop are linked. * Single operation by FAN button on remote controller is set up from remote controller (DN=31)
Option output	CN60		0V (COM)	Main prohibition input
Outside error input	CN80		Operation output	ON during operation (Answerback of HA)
—	CN20		DC12V (COM)	ON during alarm output
—	CN70		Alarm output	ON when outdoor unit is defrosted
CHK operation check	CN71		DC12V (COM)	ON during Real thermostat ON (Compressor ON)
DISP exhibition mode	CN72		Defrost output	ON when operation mode is cooling system (COOL, DRY, Cool/Heat Auto cooling)
EXCT demand	CN73		Thermo ON output	ON when operation mode is heating system (HEAT, Cool/Heat Auto cooling)
—	—		COOL output	ON when indoor fan is ON (During use of air cleaner/Interlock cabling)
—	—	—	HEAT output	Generate check code “L30” (for 1 minute continuously) to stop forcedly the operation.
—	—	—	Fan output	—
—	—	—	DC12V (COM)	—
—	—	—	Outside error input	—
—	—	—	—	—
—	—	—	—	Used for indoor operation check. (Outdoor does not communicate with remote controller, and outputs specified operation such as indoor fan “H”, drain pump ON, etc.)
—	—	—	Check mode input	Exhibition mode enables to communicate by indoor unit and remote controller only. (When power has been turned on.) Timer short (Usual)
—	—	—	0V	Indoor unit forced thermostat OFF operation
—	—	—	Display mode input	—
—	—	—	0V	—
—	—	—	Demand input	—
—	—	—	0V	—

How do you execute the setup operation?

Execute the setup operation while the unit stops.

What is the first step in the procedure for selecting function in the indoor unit?

Push SET, CL, and TEST buttons simultaneously for 4 seconds or more. The firstly displayed unit No. indicates the header indoor unit address in the group control. In this time, the fan of the selected indoor unit is turned on.

What is the second step in the procedure for selecting function in the indoor unit?

Every pushing UNIT LOUVER button, the indoor unit numbers in the group control are successively displayed. In this time, the fan of the selected indoor unit only is turned on.

What is the third step in the procedure for selecting function in the indoor unit?

Specify the item code (DN) using the setup temperature and buttons.

What is the fourth step in the procedure for selecting function in the indoor unit?

Select the setup data using the timer time and buttons. (When selecting the DN code to “33”, change the temperature indication of the unit from “°C” to “°F” on the remote controller.)

What is the fifth step in the procedure for selecting function in the indoor unit?

Push SET button. (OK if display goes on.) * To change the selected indoor unit, return to procedure 2 . * To change the item to be set up, return to procedure 3 .

What is the sixth step in the procedure for selecting function in the indoor unit?

Pushing TEST button returns the status to normal stop status.

What is the location of the Fan drive?

CN32 (White), DC12V

What is the location of the High ceiling select SW?

SW501

What is the location of the TC2 sensor?

CN101 (Black), DC5V

What is the location of the TA sensor?

CN104 (Yellow), DC5V

What is the location of the TCJ sensor?

CN102 (Red), DC5V

What is the location of the TC1 sensor?

CN100 (Brown), DC5V

What is the location of the Float SW?

CN34 (Red), DC12V

What is the location of the Filter?

CN70 (White), DC5V

What is the location of the Drain pump?

CN504 (White), DC12V

What is the location of the EXCT?

CN73 (Red), DC5V

What is the location of the External error input?

CN80 (Green), DC12V

What is the location of the DISP?

CN72 (White), DC5V

What is the location of the CHK?

CN71 (White), DC5V

What is the location of the Indoor/Outdoor central control communication LED?

D503 (Yellow)

What is the location of the Output for FS unit?

CN81 (Black), DC12V

What is the location of the PMV output?

CN82 (Blue), DC12V

What is the location of the Power supply LED of microprocessor?

D501 (Red)

What is the location of the Optional output?

CN60 (White), DC12V

What is the location of the Power supply?

CN67 (Black), AC220-240

What is the location of the DC fan return?

CN334 (White)

What is the location of the Power supply LED of remote controller?

D403 (Red)

What is the location of the Louver?

CN510 (White), DC12V

What is the location of the Optional power supply?

CN309 (Yellow), AC200V

What is the location of the HA (T10)?

CN61 (Yellow), DC12V

What is the location of the Indoor/Outdoor communication?

CN40 (Blue) * Shared with communication of central control system

What is the location of the DC fan output?

CN333 (White)

What is the location of the Remote controller?

CN41 (Blue), DC20V

What is the location of the Remote controller communication LED?

D504 (Green)

How can the start/stop operation be operated from the wired remote controller when air to air heat exchanger or ventilating fan is installed in the system?

The fan can be operated even if the indoor unit is not operating. Use a fan which can receive the no-voltage A contact as an outside input signal. In a group control, the units are collectively operated and they can not be individually operated.

How do you operate the wired remote controller?

Handle a wired remote controller in the following procedure:

• Use the wired remote controller during stop of the system.

• Be sure to set up the wired remote controller to the header unit. (Same in group control)

• In a group control, if the wired remote controller is set up to the header unit, both header and follower units are simultaneously operable.

1. Push concurrently SET + CL + TEST buttons for 4 seconds or more. The unit No. displayed firstly indicates the header indoor unit address in the group control. In this time, the fan of the selected indoor unit turns on.

2. Every pushing UNIT LOUVER button, the indoor unit numbers in group control are displayed successively. In this time, the fan of the selected indoor unit only turns on.

3. Using the setup temp or button, specify the item code 31.

4. Using the timer time or button, select the setup data. (At shipment:
   
   
   
   ) The setup data are as follows:

   Setup data Handling of operation of air to air heat exchanger or ventilating fan

   
   
   
   
   Unavailable (At shipment)

   
   
   
    Available

5. Push SET button. (OK if display goes on.)

• To change the selected indoor unit, go to the procedure 2).

• To change the item to be set up, go to the procedure 3).

6. Pushing TEST returns the status to the usual stop status.

How do you wire the remote controller?

Determine the cable length between the indoor control P.C. board and the relay within 2m.

Compact 4-way Air Discharge Cassette type, 4-way Air Discharge Cassette type, 1-way Air Discharge Cassette type (2 series), Concealed Duct Standard type, Slim Duct type, Under Ceiling type, High Wall type: Corresponds up to a relay in which rated current of the operation coil is approx. 75mA

Other type models: Corresponds up to a relay in which rated current of the operation coil is approx. 16mA (Does not correspond to a terminal block type relay on the market.)

How does the leaving-ON prevention control function work?

• This function controls the indoor units individually. It is connected with cable to the control P.C. board of the indoor unit.

• In a group control, it is connected with cable to the indoor unit (Control P.C. board), and the item code 2E is set to the connected indoor unit.

• It is used when the start operation from outside if unnecessary but the stop operation is necessary.

• Using a card switch box, card lock, etc, the forgotten-OFF of the indoor unit can be protected.

• When inserting a card, start/stop operation from the remote controller is allowed.

• When taking out a card, the system stops if the indoor unit is operating and start/stop operation from the remote controller is forbidden.

What are the control items?

1. Outside contact ON: The start/stop operation from the remote controller is allowed. (Status that card is inserted in the card switch box)

2. Outside contact OFF: If the indoor unit is operating, it is stopped forcedly. (Start/Stop prohibited to remote controller) (Status that card is taken out from the card switch box)

What happens when the card switch box does not perform the contact operation?

Convert it using a relay with b contact.

How do you operate the wired remote controller switch?

Handle the wired remote controller switch in the following procedure:

• Use the wired remote controller switch during stop of the system.

1. Push concurrently SET + CL + TEST buttons for 4 seconds or more.

2. Using the setup temp or button, specify the item code .

3. Using the timer time or button, set
   
   
    to the setup data.

4. Push SET button.

5. Push TEST button. (The status returns to the usual stop status.)

When the relay is turned on, what happens?

A forced thermostat-OFF operation starts.

What is the wiring procedure for leaving-ON prevention control?

Determine the cable length between the indoor control P.C. board and the relay within 2m.

• In the figure, the contact indicates a status that the card is taken out.

How do you set up address setup (Manual setting from remote controller)?

In case that addresses of the indoor units will be determined prior to piping work after cabling work:

• Set an indoor unit per a remote controller.

• Turn on power supply.

1. Push SET + CL + TEST buttons simultaneously for 4 seconds or more.

2. (Line address) Using the temperature setup / buttons, set  to the item code.

3. Using timer time / buttons, set the line address.

4. Push SET button. (OK when display goes on.)

5. (Indoor unit address) Using the temperature setup / buttons, set  to the item code.

6. Using timer time / buttons, set 1 to the line address.

7. Push SET button. (OK when display goes on.)

8. (Group address) Using the temperature setup / buttons, set  to the item code.

9. Using timer time / buttons, set
   
   
   
   to Individual,
   
   
    to Master unit and
   
   
    to sub unit.

10. Push SET button. (OK when display goes on.)

11. Push TEST button. Setup completes. (The status returns to the usual stop status.)

Provide an example of 2-lines cabling?

(Real line: Cabling, Broken line: Refrigerant pipe) For the above example, perform setting by connecting singly the wired remote controller without remote controller inter-unit cable.

Group address:

• Individual: 0000
• Master unit: 0001
• Sub unit: 0002 In case of group control

What is the operation procedure for address setup?

1. 1, 3, 6, 9 END 11 2, 5, 8 4, 7, 10 SET

When setting the line address from the remote controller, what addresses should not be used?

Do not use Address 29 and 30. As they are addresses which cannot be set to the outdoor unit, if they are set, the check code [E04] (Indoor/Outdoor communication circuit error) is issued.

When an address was manually set from the remote controller and the central control over the refrigerant lines is carried out, what setting should be performed for the Master unit of each line?

• Set the line address for every line using SW13 and 14 on the interface P.C. board of the center unit in each line.

• Except the least line address No., turn off SW30-2 on the interface P.C. board of the Master units in the lines connected to the identical central control. (Draw the terminal resistances of indoor/outdoor and central control line wirings together.)

• For each refrigerant line, connect the relay connector between Master unit [U1U2] and [U3U4] terminals.

• After then set the central control address. (For setting of the central control address, refer to the Installation manual for the central control equipment.)

How do you confirm indoor unit No. position?

1. To know the indoor unit addresses though position of the indoor unit is recognized * In case of individual operation (Wired remote controller : indoor unit = 1 : 1) (Follow to the procedure during operation)

   1, 2 END

2. Operation

3. To know the position of indoor unit by address

   • To confirm the unit No. in the group control (Follow to the procedure during operation) (in this procedure, the indoor units in group control stop.)

   1. Push ON / OFF button if the unit stops.

   2. Push UNIT LOUVER button. Unit No. 1-1 is displayed on LCD. (It disappears after several seconds.) The displayed unit No. indicate line address and indoor unit address. (When other indoor units are connected to the identical remote controller (Group control unit), other unit numbers are also displayed every pushing UNIT LOUVER button.

What is the procedure to confirm the unit No. in the group control?

The indoor unit numbers in the group control are successively displayed, and fan, louver, and drain pump of the corresponding indoor unit are turned on. (Follow to the procedure during operation)

1. Push VENT and TEST buttons simultaneously for 4 seconds or more.

   • Unit No. is displayed.

   • Fans and louvers of all the indoor units in the group control operate.

2. Every pushing UNIT LOUVER button, the unit num-bers in the group control are successively displayed.

   • The unit No. displayed at the first time indicates the master unit address.

   • Fan and louver of the selected indoor unit only operate.

3. Push TEST button to finish the procedure. All the indoor units in the group control stop.

What is the procedure for function selection setup?

Perform setting while the air conditioner stops.

1. Push TEST + SET + CL buttons simultaneously for 4 seconds or more. The first displayed unit No. is the master indoor unit address in the group control. In this time, fan and louver of the selected indoor unit operate.

2. Every pushing UNIT LOUVER button (button at left side), the indoor unit No. in the group control is displayed one after the other. In this time, fan and louver of the selected indoor unit only operate.

3. Using the set temperature TEMP. buttons, specify the item code (DN).

4. Using the timer time TIME buttons, select the set data.

5. Push SET button. (OK if indication lights)

   • To change the selected indoor unit, proceed to Procedure 2.

   • To change item to be set up, proceed to Procedure 3.

6. Pushing TEST button returns the status to the normal stop status.

What is the operation procedure for function selection setup?

1. 3, 6 1 4, 5 2 SET

How do you check all the unit No. from an arbitrary wired remote controller?

Carry out this procedure during stop of system. The indoor unit No. and the position in the identical refrigerant piping can be checked. An outdoor unit is selected, the identical refrigerant piping and the indoor unit No. are displayed one after the other, and then its fan and louver are on.

1. Push the timer time button + TEST simultaneously for 4 seconds or more. First line 1 and item code  (Address Change) are displayed. (Select outdoor unit.)

2. Select line address using UNIT LOUVER / SWING/FIX button.

3. Determine the selected line address using SET button.

   • The address of the indoor unit connected to the refrigerant piping of the selected outdoor unit is dis-played and the fan and the louver are on.

4. Every pushing UNIT LOUVER button, the indoor unit No. in the identical piping is displayed one after the other.

   • Only fan and louver of the selected indoor unit start operation.

[To select the other line address]

5. Push CL button and the operation returns to Procedure 2.

   • The indoor address of other line can be continuously checked.

6. Push TEST button and then the procedure finishes.

What is the operation procedure for checking all unit No. from an arbitrary wired remote controller?

1. 6, 1 3, 5 4 2 SET

How do you change all indoor addresses from an arbitrary wired remote controller?

(It is possible when setting has finished by automatic addresses.) Contents: The indoor unit addresses in each identical refrigerant piping line can be changed from an arbitrary wired remote controller.  Enter in address check/change mode and then change the address.

What is the procedure for changing all indoor addresses?

Carry out this procedure during stop of system.

1. Push the timer time button + TEST simultaneously for 4 seconds or more. First line 1 and item code  (Address Change) are displayed.

2. Select line address using UNIT LOUVER / SWING/FIX button.

3. Push the SET button.

   • The address of the indoor unit connected to the refrigerant piping of the selected outdoor unit is displayed and the fan and the louver are on. First the current indoor address is displayed. (Line address is not displayed.)

4. TIME button push up/down the indoor address of the SET DATA. The set data is changed to a new address.

5. Push SET button to determine the set data.

6. Every pushing UNIT LOUVER button, the indoor unit No. in the identical piping is displayed one after the other.

   • Only fan and louver of the selected indoor unit start operation. Repeat the Procedures 4 to 6 to change all the indoor addresses so that they are not duplicated.

7. Push SET button. (All the indications of LCD go on.)

8. Push TEST button and then the procedure finishes.

What is the operation procedure for changing all indoor addresses from an arbitrary wired remote controller?

1. 3, 1 2 5, 4, 6 7, 8 SET

How do you cancel line selection?

Push CL button to select a line again in the Procedure 2.

When do you want to complete the setting?

If the UNIT No. is not call up here, the outdoor unit in that line does not exist.

How do you clear the error of the outdoor unit?

In the unit of refrigerant line connected by the indoor unit of the remote controller to be operated, the error of the outdoor unit currently detected is cleared. (Error of the indoor unit is not cleared.) The service monitor function of the remote controller is utilized.

1. Push CL + TEST buttons simultaneously for 4 seconds or more to change the mode to service monitor mode.
2. Push the TEMP. button to set the item code to [FF].
3. The display of A part in the following figure is counted as “
   
   
   ” → “
   
   
   ” → “
   
   
   ” → “
   
   
   ” → “
   
   
   ” → “
   
   
   
   ” with a 5-second interval. When “
   
   
   
   ” appears, the error was cleared. However, counting from “
   
   
   ” is repeated on the display screen.
4. When pushing the TEST button, the status becomes normal.

How do you clear the error of the indoor unit?

The error of the indoor unit is cleared by the ON / OFF button of the remote controller. (Only the error of the indoor unit connected with the remote controller to be operated is cleared.)

What is the monitoring function of the remote controller switch?

When using the remote controller (Model Name: RBC-AMT32E), the following monitoring function can be utilized. The temperature of each sensor of the remote controller, indoor unit, and outdoor unit and the operating status can be checked by calling the service monitor mode from the remote controller.

What is the procedure for calling the display?

1. Push TEST + CL buttons simultaneously for 4 seconds or more to call up the service monitor mode. The service monitor goes on and firstly the temperature of the CODE No.
   
   is displayed.
2. Push the TEMP. button to change CODE No. (CODE No.) to the CODE No. to be monitored. For the display code, refer to the following table.
3. Push the UNIT LOUVER button to change the item to be monitored. The sensor temperature of the indoor unit or outdoor unit in its refrigerant line and the operating status are monitored.
4. Push the TEST button to return the status to the normal display.

In the group connection, only the data of what is displayed?

In the group connection, only data of the header indoor unit is displayed.

What do 01, 10, and 11 indicate?

• 01: Only compressor 1 is ON.
• 10: Only compressor 2 is ON.
• 11: Both compressor 1 and 2 are ON.

For the CODE No., an example of what is described?

For the CODE No., an example of the header unit is described.

What does the upper girder of CODE No. indicate?

The upper girder of CODE No. indicates the outdoor unit No.

• 1: Header unit (A)
• 2: Follower unit (B)
• 3: Follower unit ©
• 4: Follower unit (D)

What is the LED display on P.C. board?

1. D501 (Red)
   • D501 goes on at the same time when the power supply is turned on. (Goes on with the operation of the main microprocessor)
   • D501 flashes with 1-second interval (every 0.5 second) : When there is no EEPROM or write-in error
   • D501 flashes with 10-seconds interval (every 5 second) : In DISP mode
   • D501 flashes with 2-seconds interval (every 1 second) : During setting of function exchange (EEPROM)
2. D403 (Red)
   • D403 goes on when power is supplied to the remote controller. (ON in hardware)
3. D503 (Yellow): Indoor/Outdoor central control
   • D503 goes on for 5 seconds at the first half during communication with the central controller.
   • D503 flashes for 5 seconds with a 0.2-second interval at the latter half during communication with the outdoor unit. (Goes on for 0.1 seconds, goes off for 0.1 seconds)
4. D504 (Green): Remote controller communication
   • D504 goes on for 5 seconds at the first half during communication with the remote controller. (Header unit of group)
   • In the group indoor unit, D504 flashes for 5 seconds with a 0.2-second interval at the latter half during communication between header and follower unit. (Goes on for 0.1 second, goes off for 0.1 second)

If there is a [E28] error, what should you do?

Check the check display on the interface P.C. board of the corresponding follower unit. Check the position or part in which a trouble occurred.

What models are the troubleshooting steps applicable to?

1. S-MMS Multi type models
   • Indoor unit : MMX-APXXX, Outdoor unit : MMY-MAPXXXXT8X, MMY-MAPXXXHT7X
2. Super Heat Recovery Multi type models
   • Indoor unit : MMX-APXXX, Outdoor unit : MMY-MAPXXXFT8X
3. Mini-S-MMS Multi type models
   • Indoor unit : MMX-APXXX, Outdoor unit : MCY-MAPXXXHT, MCY-MAPXXXHT2X

What tools and measuring devices are required for troubleshooting?

• Screwdrivers (Philips, Minus), spanner, radio pinchers, nipper, push pin for reset switch, etc.
• Tester, thermometer, pressure gauge, etc.

What are some things to confirm before checking for trouble?

No.	Operation	Check items
1	Compressor does not operate.	* Is not delayed for 3 minutes? (3 minutes after compressor-OFF) <br> * Is not thermostat OFF?
2	Indoor fan does not work.	* Is not the fan operating or timer? <br> * Is not the system initially communicating?
3	Outdoor fan does not rotate, or fan speed changes.	* Heating operation cannot be performed under the condition of outside temperature 21°C or higher. Cooling operation cannot be performed under the condition of outside temperature –5°C or lower.
4	Indoor fan does not stop.	* Is not the cold draft prevention being controlled in heating operation? <br> * Is not low cooling operation being controlled? <br> * Is not a defrost operation being performed? <br> * Is not after-heat elimination operation being controlled after heating operation?
5	Start/stop operation on the remote controller is unavailable.	* Is not auxiliary unit or remote control being operated? <br> * Is connecting wire of indoor unit or remote controller correct?
6	—	—

What should you do while a check operation is performed?

While a check operation is performed, a malfunction of the microprocessor may be caused due to the condition of the power supply or the external noise. If there is any noise source, change wires of the remote controller and signal wires to shield wires.

How do you check the system?

On the remote controller (Remote controller, Central control remote controller) and on the interface P.C. board of the outdoor unit, the LCD display part (Remote controller) or 7-segment display part (on the outdoor interface P.C. board) is provided in order to display the operation status. When a trouble occurred, the method to judge the trouble or defective position of the air conditioner by this self-diagnosis function is shown below.

The following table shows the list of each check code that each device detects. Check the check contents in the following table according to the position to be checked.

• Check from the indoor remote controller or TCC-LINK central controller: Refer to “Display on remote controller & TCC-LINK central controller” in the following table.
• Check from the outdoor unit: Refer to “Display of outdoor segment” in the following table.
• Check from the indoor unit of the wireless remote controller: Refer to the Sensor lamp display” in the following table.

What is the check code display list for when the indoor unit detects an error?

Check code display	TCC-LINK central & remote controller	AI-NET central (Network adapter use)	Outdoor 7-segment	Auxiliary code	Main defective position	Description
E03	E03	97	—	—	Regular communication error between indoor and remote controller	No communication from remote controller and network adapter (No central control system communication also)
E04	E04	04	—	—	Regular communication error between indoor and outdoor	No communication from outdoor unit
E08	E08	96	E08	Duplicated indoor unit No.	Duplicated indoor address	An address same to self-address was detected.
E10	E10	CF	—	—	Communication error between indoor MCU	Communication error between MCU of main motor microprocessors
E18	E18	97, 99	—	—	Regular communication error between header and follower in indoor unit	Regular communication between header and follower units in indoor unit was impossible.
F01	F01	OF	—	—	Indoor heat exchanger temp. sensor (TCJ) error	Open/short of heat exchanger temp. sensor (TCJ) was detected.
F02	F02	Od	—	—	Indoor heat exchanger temp. sensor (TC2) error	Open/short of heat exchanger temp. sensor (TC2) was detected.
F03	F03	93	—	—	Indoor heat exchanger temp. sensor (TC1) error	Open/short of heat exchanger temp. sensor (TC1) was detected.
F10	F10	OC	—	—	Room tem. Sensor (TA) error	Open/short of room temp. sensor (TA) was detected.
F29	F29	12	—	—	Indoor or other P.C. board error	Indoor EEPROM error (Other error may be detected.)
L03	L03	96	—	—	Duplicated setting of header in indoor group	There were multiple header units in a group.
L07	L07	99	—	—	There is group cable in individual indoor unit.	There is even an indoor unit connected to group in an individual indoor unit.
L08	L08	99	L08	—	Indoor group address is unset.	Indoor group address is unset. (Detected also at the outdoor unit side)
L09	L09	46	—	—	Indoor capacity is unset.	Capacity of indoor unit is unset.
L20	L20	98	—	—	Duplicated central control system address	Setting of central control system address is duplicated.
L30	L30	b6	L30	Detected indoor unit No.	External error was input in indoor (Interlock).	System abnormally stopped by input of external error (CN80).
P01	P01	11	—	—	Indoor AC fan error	Error of indoor AC can was detected. (Fan motor thermal relay operation)
P10	P10	Ob	P10	Detected indoor unit No.	Indoor overflow was detected.	Float switch operated.
P12	P12	11	—	—	Indoor DC fan error	Error (Over-current, lock, etc.) of indoor DC fan was detected.
P31	P31	47	—	—	Other indoor unit error	Group follower unit cannot be operated by [E03/L03/L07/L08] alarm of header unit.

What is the check code display list for when the remote controller detects an error?

Check code display	Remote controller	AI-NET central (Network adapter use)	Outdoor 7-segment	Auxiliary code	Main defective position	Description
E01	E01	97	—	—	No remote controller header unit, remote controller communication (receive) error	When a signal cannot be received from the indoor unit, when the header of the remote controller was not set (including 2 remote controllers)
E02	E02	—	—	—	Remote controller communication (send) error	When the signal cannot be sent to the indoor unit
E09	E09	99	—	—	Duplicated remote controller header	In 2-remote controller control, both remote controllers were set to header. (Indoor header stops with alarm and follower unit continues operation.)

What is the check code display list for when the central controller detects an error?

Check code display	TCC-LINK central	AI-NET central (Network adapter use)	Outdoor 7-segment	Auxiliary code	Main defective position	Description
C05	C05	98	—	—	Central control system communication (send) error	When the signal of central control system cannot be sent, there are the same multiple central devices (AI-NET)
C06	C06	97	—	—	Central control system communication (receive) error	When the signal of the central control system cannot be received
—	—	99	—	—	There are multiple network adapters.	There were multiple network adapters (AI-NET) on the remote controller communication line.
C12	C12	23	—	—	Batched alarm of the interface for general-purpose equipment control	Error of equipment connected to the control interface of the general-purpose unit exclusive to TCC-LINK/AI-NET
P30	P30	b7	—	—	Group follower unit error	Group follower unit error (For the remote controller, [*** ] details is displayed together with unit No.)

What is the check code display list for when the outdoor unit (S-MMS standard & accumulating outdoor interface) detects an error?

Outdoor 7-segment	Auxiliary code	TCC-LINK central & remote controller	AI-NET central (Network adapter use)	Main defective position	Description
E06	No. of indoor units with normal receiving	E06	04	Decrease of No. of indoor units	When the signal did not come from the indoor unit (Decrease of connected indoor units)
E07	—	(E04)	(97, 99)	Indoor/Outdoor communication circuit error	When the signal could not send to the indoor unit (→ Status that there is no communication to the indoor unit from the outdoor unit)
E08	Duplicated indoor unit No.	(E08)	(96)	Duplicated indoor address	When there were multiple indoor units with the same address (Detected at the indoor unit side also)
E12	01: Communication between indoor and outdoor <br> 02: Communication between outdoor units	E12	42	Automatic address start error	When automatic indoor address operation was performed during setting of automatic address of other system <br> When automatic outdoor address operation was performed during the setting of automatic indoor address of other system
E15	—	E15	42	There is no indoor during automatic address	No receiving of the signal from the outdoor unit during automatic address
E16	00: Capacity over <br> 01 ~ : No. of connected units	E16	89	No. of connected indoor units/Capacity over	Total capacity of indoor units was over the total outdoor capacity × 135%.
E19	00: No center <br> 02: 2 or more header units	E19	96	No. of header outdoor units error	There is no header outdoor unit or there are multiple header outdoor units in 1 line.
E20	01: Connection of other system outdoor <br> 02: Connection of other system indoor	E20	42	Connection of other system during automatic address	When the indoor unit of other line was detected during the setting of automatic address
E23	—	E23	15	Communication (send) error between outdoor units	When sending operation to other outdoor unit was impossible
E25	—	E25	15	Duplicated setting of follower outdoor address	Duplicated outdoor address that was manually set
E26	No. of outdoor units with normal receiving	E26	15	Decrease of connected outdoor units	There was no communication from the follower outdoor unit (Decrease of No. of connected follower outdoor units)
E28	Detected outdoor unit No.	E28	d2	Error of follower outdoor units	When the header outdoor unit detected an error of the follower outdoor unit (Follower outdoor unit: Details display)
E31	01: A3-IPDU1 error <br> 02: A3-IPDU2 error <br> 03: A3-IPDU1/2 error <br> 04: Fan IPDU error <br> 05: A3-IPDU1 + Fan IPDU error <br> 06: A3-IPDU2 + Fan IPDU error <br> 07: All IPDU error	E31	CF	IPDU communication error	No communication of each IPDU (P.C. board) in the inverter box
F04	—	F04	19	Outdoor discharge temp. sensor (TD1) error	Open/short of discharge temp. sensor (TD1) was detected.
F05	—	F05	A1	Outdoor discharge temp. sensor (TD2) error	Open/short of discharge temp. sensor (TD2) was detected.
F06	—	F06	18	Outdoor heat exchanger temp. (TE1) error	Open/short of heat exchanger temp. sensor (TE1) was detected.
F07	—	F07	18	Outdoor liquid temp. sensor (TL) error	Open/short of outdoor liquid temp. sensor (TL) was detected.
F08	—	F08	1b	Outdoor external temp. sensor (TO) error	Open/short of external temp. sensor (TO) was detected.
F12	—	F12	A2	Outdoor suction temp. sensor (TS1) error	Open/short of outdoor suction temp. sensor (TS1) was detected.
F15	—	F15	18	Outdoor temp. sensor (TE, TL) miswiring	Miswiring by temp. sensor (TE, TL) was detected.
F16	—	F16	43	Outdoor pressure sensor (Pd, Ps) miswiring	Miswiring by outdoor pressure sensor (Pd, Ps) was detected.
F23	—	F23	43	Low pressure (Ps) sensor error	Output voltage of low pressure (Ps) sensor detected 0.
F24	—	F24	43	High pressure (Pd) sensor error	When the output voltage of high pressure (Pd) sensor was 0 or when the abnormal value was detected during stopping of compressor
F31	—	F31	1C	Outdoor EEPROM error	Outdoor EEPROM error (Center unit stops with alarm and follower unit continues operation.)

What is the check code display list for when the outdoor unit detects an error?

Outdoor 7-segment	Auxiliary code	TCC-LINK central & remote controller	AI-NET central (Network adapter use)	Main defective position	Description
H04	—	H04	44	Compressor1 case thermo operation	When the case thermo of compressor 1 performed protective operation
H06	—	H06	20	Low pressure protective operation	Protective detection operation by low-pressure (Ps) sensor
H07	—	H07	d7	Oil face drop detection protection	Protective detection operation by temp. sensor (TK1 to 4) for oil face detection
H08	01: TK1 sensor error <br> 02: TK2 sensor error <br> 03: TK3 sensor error <br> 04: TK4 sensor error	H08	d4	Error of temp. sensor (TK1 to 4) for oil face detection	When open/short of temp. sensor (TK1 to 4) for oil face detection was detected
H14	—	H14	44	Compressor2 case thermo operation	Case thermo of compressor2 performed protective operation.
H16	01: TK1 oil circuit system error <br> 02: TK2 oil circuit system error <br> 03: TK3 oil circuit system error <br> 04: TK4 oil circuit system error	H16	d7	Oil face detection circuit system error	After the start of compressor operation, the temp. variation of temp. sensor (TK1 to 4) for oil face detection was not detected.
L04	—	L04	96	Duplicated outdoor line address	Duplicated setting of line address against outdoor units in different refrigerant lines
L06	No. of priority indoor units (Individual display: [L05/L06])	L05 <br> L06	96 <br> 96	Duplicated priority indoor units (Displayed in the priority indoor) <br> Duplicated priority indoor units (Displayed in except priority indoor)	When there were multiple priority indoor units (against priority indoor unit) <br> When there were multiple priority indoor units (against not priority indoor unit)
L08	—	(L08)	(99)	Unset indoor group address	There was an indoor unit that indoor group address was not set (Detected at the indoor unit side also)
L10	—	L10	88	Unset outdoor capacity	When the capacity of the outdoor unit was not set (Replace service P.C. board.)
L18	—	L18	8A	Flow selector unit system error	COOL/HEAT cycle error due to mispiping was detected.
L28	—	L28	46	No. of connected outdoor units over	No. of connected outdoor units was over 4.
L29	01: A3-IPDU1 error <br> 02: A3-IPDU2 error <br> 03: A3-IPDU1, 2 error <br> 04: Fan IPDU error <br> 05: A3-IPDU1 + fan IPDU error <br> 06: A3-IPDU2 + fan IPDU error <br> 07: All IPDU error	L29	CF	No. of IPDU units’ error	When No. of IPDU (P.C. board) was little in the inverter box
L30	Detected indoor unit No.	(L30)	(b6)	External error input in indoor unit (Interlock)	There was an indoor unit which stopped abnormally due to external error input in 1 line. (ß Indoor unit detected.)
P03	—	P03	1E	Outdoor discharge (TD1) temp. error	When a high temp. error was detected by discharge temp. sensor (TD1)
P05	01: Detection of open phase <br> 02: Negative phase error	P05	AF	Detection of open phase/Negative phase error	Open phase/Negative phase error was detected when power was supplied.
P07	01: Compressor 1 side <br> 02: Compressor 2 side	P07	1C	Heat sink overheat error	When a high temp. error was detected by outdoor IGBT incorporated temp. sensor (TH)
P10	Detected indoor unit No.	(P10)	(Ob)	There is an outdoor unit with detection of overflow	There was an indoor unit which stopped abnormally due to detection of overflow in 1 line. (ß Indoor unit detected.)
P13	—	P13	47	Outdoor liquid back detection error	When an error was judged as liquid back operation from the refrigerant cycle status
P15	01: TS condition <br> 02: TD condition	P15	AE	Gas leak detection	The outdoor suction temp. sensor (TS1) detected high temperature continuously and repeatedly over the standard value.
P17	—	P17	bb	Outdoor discharge (TD2) temp. error	Discharge temp. sensor (TD2) detected high temp. error.
P19	Detected outdoor unit No.	P19	O8	4-way valve inverse error	Error of refrigerant cycle error was detected during heating operation.
P20	—	P20	22	High pressure protective operation	High pressure (Pd) sensor detected value over the standard value.

What is the check code display list for when the IPDU in S-MMS standard outdoor unit detects an error?

Outdoor 7-segment	Auxiliary code	TCC-LINK central & remote controller	AI-NET central (Network adapter use)	Main defective position	Description
F13	01: Compressor 1 side <br> 02: Compressor 2 side	F13	43	Outdoor IGBT incorporated temp. sensor (TH) error	When open/short of outdoor IGBT incorporated temp. sensor (TH) was detected
H01	01: Compressor 1 side <br> 02: Compressor 2 side	H01	1F	Compressor break-down	When inverter current (Idc) detection circuit detected over-current
H02	01: Compressor 1 side <br> 02: Compressor 2 side	H02	1d	Compressor error (Lock)	When lock of compressor was detected
H03	01: Compressor 1 side

When a trouble occurred on the air conditioner, how is the check code displayed?

The check code and the indoor unit No. are displayed on the display section of the remote controller while the air conditioner operates.

If the display disappeared, how do you check the error?

Operate the air conditioner and check the error based upon the “Confirmation of error history.”

How do you confirm the error history?

When a trouble occurred on the air conditioner, the error history can be confirmed with the following procedure. (Up to 4 error histories are stored in memory.)

This history can be confirmed from either operating or stop.

1. Push and SET buttons in succession for 4 seconds or more.
2. SERVICE CHECK goes on and Item code 01 goes on.
3. When selecting (flash) the group number if there is the alarm history, the UNIT number and the latest alarm history are displayed alternately.

• In this time, the temperature cannot be set up.

4. To confirm the alarm history other than the latest one, push temp. set / to select Item code (01 to 04).
5. To confirm the alarm in the other group, push ZONE and GROUP to select the group number Do not push CL button because all the alarm histories of the currently selected group are deleted.
6. To finish the service check, push button.

When specifying the check code, where do you check the 7-segment display?

Check the 7-segment display on the center unit.

Where do you confirm check codes which are not displayed on the outdoor 7-segment?

Confirm it in Section “9-2 How to Check / Check code display list (Indoor unit)”.

What is the cause of trouble occurrence when the operation timer is ready and there is no indication at all?

Power supply OFF or miswiring between receiving unit and indoor unit

What is the cause of trouble occurrence when the operation timer is ready and there is a flash?

Receiving error Receiving unit Miswiring or wire connection error

What is the cause of trouble occurrence when the operation timer is ready and there is a sending error?

Communication interruption between receiving unit and indoor unit

What is the cause of trouble occurrence when the operation timer is ready and there is a flash, duplicated indoor unit No. (Address) Setup error?

Duplicated header units of remote controller

What is the cause of trouble occurrence when the operation timer is ready and there is an alternate flash, communication error between MCU on indoor unit P.C. board?

Automatic address start error

What is the cause of trouble occurrence when the operation timer is ready and there is an alternate flash, wire connection error between indoor units, indoor power supply OFF?

Miswiring or wire connection error between indoor unit and outdoor unit (Communication interruption between indoor and outdoor units)

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, communication (receiving) error between indoor and outdoor units, decrease of No. of connected indoor units?

Communication (sending) error between indoor and outdoor units

What is the cause of trouble occurrence when the operation timer is ready and there is a flash, No indoor unit during setting of automatic address?

No. of connected indoor units, capacity over

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, error of No. of center unit?

Disagreement of refrigerant pipe communication during setting of automatic address

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, communication (sending) error between outdoor units?

Duplicated setting of follower unit address

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, communication (receiving) error between outdoor units, decrease of No. of connected outdoor units?

Follower unit error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, IPDU communication error?

Indoor fan error

What is the cause of trouble occurrence when the operation timer is ready and there is an alternate flash, indoor overflow error?

Indoor fan error

What is the cause of trouble occurrence when the operation timer is ready and there is an alternate flash, outdoor unit liquid back detection error?

Outdoor unit discharge temp. (TD1) error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, outdoor unit high pressure switch operation?

Outdoor unit open phase error was detected, negative phase error was detected

What is the cause of trouble occurrence when the operation timer is ready and there is a flash, outdoor unit heat sink overheat error: Heat radiation error of electric part (IGBT) in outdoor unit?

Gas leak was detected: Short of refrigerant charge amount

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, outdoor unit discharge temp. (TD2) error?

Outdoor unit 4-way valve inverse error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, high pressure protection error?

Outdoor unit DC fan error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, outdoor unit G-Tr short-circuit error?

Compressor position detection circuit error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, other indoor unit stopped due to error in the group?

Heat exchanger sensor (TCJ) error

What is the cause of trouble occurrence when the operation timer is ready and there is an alternate flash, heat exchanger sensor (TC2) error Temp. sensor error in indoor unit?

Heat exchanger sensor (TC1) error

What is the cause of trouble occurrence when the operation timer is ready and there is an alternate flash, room temp. sensor (TA) error?

Discharge temp. sensor (TD1) error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, discharge temp. sensor (TD2) error?

Heat exchanger sensor (TE1) error

What is the cause of trouble occurrence when the operation timer is ready and there is a flash, liquid temp. sensor (TL) error Outdoor unit temp. sensor error?

Outside temp. sensor (TO) error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, suction temp. sensor (TS1) error?

Heat sink sensor (TH) error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, misconnection of heat exchanger sensor (TE) with liquid temp. sensor (TL) → Miswiring of temp. sensor in outdoor unit or miss-mounting?

Miswiring between high pressure sensor (Pd) and low pressure sensor (Ps) → Misconnection of pressure sensor in outdoor unit

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, low pressure sensor (Ps) error Pressure sensor error in outdoor unit?

High pressure sensor (Pd) error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, indoor unit EEPROM error?

Compressor break-down

What is the cause of trouble occurrence when the operation timer is ready and there is an alternate flash, compressor lock Outdoor unit compressor system error?

Current detection circuit error

What is the cause of trouble occurrence when the operation timer is ready and there is an alternate flash, Compressor 1 case thermo operation?

Low pressure (Ps) drop error Protections stop of outdoor unit

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, oil face drop detection error?

Oil face detection circuit system temp. sensor (TK1, TK2, TK3, TK4) error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, Compressor 2 chase thermo operation: Protective device of outdoor unit operated?

Oil face detection circuit system error: Outdoor unit TK1, TK2, TK3, TK4 circuit system error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, duplicated header units in indoor unit?

Duplicated priority indoor unit (Displayed in the room with priority)

What is the cause of trouble occurrence when the operation timer is ready and there is an alternate flash, duplicated priority indoor unit (Displayed in a room except one with priority)?

Group cable was connected to individual indoor unit

What is the cause of trouble occurrence when the operation timer is ready and there is an alternate flash, Indoor group address was unset?

Indoor capacity was unset

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, duplicated setting of outdoor line address?

Outdoor capacity was unset

What is the cause of trouble occurrence when the operation timer is ready and there is a flash, disagreement error of outdoor unit type?

COOL/HEAT select unit system error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, duplicated address of central control system?

No. of connected outdoor units over

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, Defective No. of IPDU?

Indoor unit outside interlock error

What is the cause of trouble occurrence when the operation timer is ready and there is a simultaneous flash, outdoor unit EEPROM error?

During test run

What is the cause of trouble occurrence when the operation timer is ready and there is an alternate flash, COOL/HEAT disagreement (Automatic cooling/heating setup to automatic cooling/heating unavailable model, heating setup to cooling only model)?

Nothing

What is the check code name for a communication error between indoor and remote controller (detected at remote controller side)?

E01

What is the detected position for a communication error between indoor and remote controller (detected at remote controller side)?

Remote controller

What is the status for a communication error between indoor and remote controller (detected at remote controller side)?

Corresponding unit only stops

What is the error detection condition for a communication error between indoor and remote controller (detected at remote controller side)?

Communication interrupted between indoor P.C. board and remote controller

What are the check items (position) for a communication error between indoor and remote controller (detected at remote controller side)?

• Check remote controller inter-unit cable (A/B)
• Check disconnection, connector contact error
• Check indoor power supply
• Check indoor P.C. board error
• Check remote controller address setup. (When two remote controllers operate)

What is the check code name for a remote controller sending error?

E02

What is the detected position for a remote controller sending error?

Remote controller

What is the status for a remote controller sending error?

Corresponding unit only stops

What is the error detection condition for a remote controller sending error?

Signal could not be sent from remote controller to indoor unit

What are the check items (position) for a remote controller sending error?

• Check remote controller P.C. board
• Check the communication wire of remote controller: Exchange remote controller

What is the check code name for a communication error between indoor and remote controller (detected at indoor side)?

E03

What is the detected position for a communication error between indoor and remote controller (detected at indoor side)?

Indoor unit

What is the status for a communication error between indoor and remote controller (detected at indoor side)?

Corresponding unit only stops

What is the error detection condition for a communication error between indoor and remote controller (detected at indoor side)?

No communication from remote controller (including wireless) and communication adapter

What are the check items (position) for a communication error between indoor and remote controller (detected at indoor side)?

• Check remote controller and communication adapter wiring

What is the check code name for an Indoor/outdoor communication circuit error (detected at indoor side)?

E04

What is the detected position for an Indoor/outdoor communication circuit error (detected at indoor side)?

Indoor unit

What is the status for an Indoor/outdoor communication circuit error (detected at indoor side)?

Corresponding unit only stops

What is the error detection condition for an Indoor/outdoor communication circuit error (detected at indoor side)?

Indoor unit does not receive communication from outdoor unit

What are the check items (position) for an Indoor/outdoor communication circuit error (detected at indoor side)?

• Check power-ON order of indoor/outdoor
• Check indoor address setup
• Check inter-unit cabling between indoor and outdoor
• Check outdoor end terminal resistance setup (SW30-2)

What is the check code name for a decreased number of indoor units?

E06

What is the detected position for a decreased number of indoor units?

I/F

What is the status for a decreased number of indoor units?

All stop

What is the error detection condition for a decreased number of indoor units?

When signal is not sent for a certain period from the indoor unit which has been used to send signals

What are the check items (position) for a decreased number of indoor units?

• Check the power supply of indoor unit (Power-ON)
• Check connection of communication line between indoor and outdoor
• Check connector connection for communication in indoor P.C. board
• Check connector connection for communication in outdoor P.C. board
• Check indoor P.C. board failure
• Check outdoor P.C. board (I/F) failure

What is the check code name for an Indoor/outdoor communication circuit error (detected at outdoor side)?

E07

What is the detected position for an Indoor/outdoor communication circuit error (detected at outdoor side)?

I/F

What is the status for an Indoor/outdoor communication circuit error (detected at outdoor side)?

All stop

What is the error detection condition for an Indoor/outdoor communication circuit error (detected at outdoor side)?

Transmission from outdoor to indoor cannot continue for 30 seconds

What are the check items (position) for an Indoor/outdoor communication circuit error (detected at outdoor side)?

• Check outdoor terminator resistor setup (SW30-2)
• Check the communication connection between indoor and outdoor

What is the check code name for duplicated indoor addresses?

E08

What is the detected position for duplicated indoor addresses?

Indoor I/F

What is the status for duplicated indoor addresses?

All stop

What is the error detection condition for duplicated indoor addresses?

Multiple indoor unit address setup are duplicated

What are the check items (position) for duplicated indoor addresses?

• Check indoor address
• Check the change of remote controller connection (Group / individual) after setup of indoor address

What is the check code name for duplicated master remote controllers?

E09

What is the detected position for duplicated master remote controllers?

Remote controller

What is the status for duplicated master remote controllers?

Corresponding unit only stops

What is the error detection condition for duplicated master remote controllers?

In 2-remote controller control (including wireless), both are setup as master (Header indoor unit stops and other indoor unit is operating)

What are the check items (position) for duplicated master remote controllers?

• Check remote controller setup
• Check remote controller P.C. board

What is the check code name for a communication error between indoor P.C. board assembly?

E10

What is the detected position for a communication error between indoor P.C. board assembly?

Indoor unit

What is the status for a communication error between indoor P.C. board assembly?

Corresponding unit only stops

What is the error detection condition for a communication error between indoor P.C. board assembly?

Communication was not succeeded after power was supplied or during communication

• When indoor automatic address started, other refrigerant circuit system was setting automatic address
• When outdoor automatic address started, indoor automatic address was executed

What are the check items (position) for a communication error between indoor P.C. board assembly?

• Indoor P.C. board failure
• Setup the address again after disconnecting communication connection with other refrigerant circuit system

What is the check code name for an Automatic address start error?

E12

What is the detected position for an Automatic address start error?

I/F

What is the status for an Automatic address start error?

All stop

What is the error detection condition for an Automatic address start error?

Nothing

What are the check items (position) for an Automatic address start error?

Nothing

What is the check code name for no corresponding indoor unit during automatic address?

E15

What is the detected position for no corresponding indoor unit during automatic address?

I/F

What is the status for no corresponding indoor unit during automatic address?

All stop

What is the error detection condition for no corresponding indoor unit during automatic address?

Indoor unit is not found when indoor automatic address start was set up

What are the check items (position) for no corresponding indoor unit during automatic address?

• Check the communication line connection between indoor and outdoor
• Check the electric power line error in indoor
• Check the noise of surrounding devices
• Power failure
• Check indoor P.C. board error

What is the check code name for No. of connected indoor units / Capacity over?

E16

What is the detected position for No. of connected indoor units / Capacity over?

I/F

What is the status for No. of connected indoor units / Capacity over?

All stop

What is the error detection condition for No. of connected indoor units / Capacity over?

• Total capacity of indoor units exceeded 135% of total outdoor capacity
• No. of connected indoor units are more than 48 units

What are the check items (position) for No. of connected indoor units / Capacity over?

• Check the connection capacity of indoor unit
• Check the HP capacity of indoor unit
• Check the indoor/outdoor capacity setup
• Check the No. of connected indoor units
• Check the outdoor I/F P.C. board error

What is the check code name for a communication error between indoor header and follower units?

E18

What is the detected position for a communication error between indoor header and follower units?

Indoor unit

What is the status for a communication error between indoor header and follower units?

Corresponding unit only stops

What is the error detection condition for a communication error between indoor header and follower units?

Regular communication between indoor header and follower units

What are the check items (position) for a communication error between indoor header and follower units?

• Check cable of the remote controller
• Check power cabling of indoor
• Check P.C. board of indoor

What is the check code name for a header outdoor unit quantity error?

E19

What is the detected position for a header outdoor unit quantity error?

I/F

What is the status for a header outdoor unit quantity error?

All stop

What is the error detection condition for a header outdoor unit quantity error?

• There are multiple header outdoor units in 1 line
• There is none of header outdoor unit in 1 line

What are the check items (position) for a header outdoor unit quantity error?

The outdoor unit connected with communication cable between indoor and outdoor (U1.U2) is the outdoor unit

• Check connection of communication line between indoor and outdoor

What is the check code name for other line unit connected during automatic address?

E20

What is the detected position for other line unit connected during automatic address?

I/F

What is the status for other line unit connected during automatic address?

All stop

What is the error detection condition for other line unit connected during automatic address?

Unit of other line was connected when indoor automatic address started

What are the check items (position) for other line unit connected during automatic address?

• Check outdoor P.C. board(I/F) error

What is the check code name for a communication sending error between outdoor units?

E23

What is the detected position for a communication sending error between outdoor units?

I/F

What is the status for a communication sending error between outdoor units?

All stop

What is the error detection condition for a communication sending error between outdoor units?

Transmission of other outdoor unit was unavailable for 30 seconds or more

What are the check items (position) for a communication sending error between outdoor units?

Separate the cable between lines according to automatic address setup method in “Address setup”

• Check power supply in outdoor unit. (Is power supplied?)
• Check connection or disconnection of connecting wire between outdoor units
• Check connection of connector for outdoor P.C. board communication
• Check outdoor P.C. board (I/F) error
• Check terminal resistance setting of communication between outdoor units

What is the check code name for a duplicated outdoor follower address setup?

E25

What is the detected position for a duplicated outdoor follower address setup?

I/F

What is the status for a duplicated outdoor follower address setup?

All stop

What is the error detection condition for a duplicated outdoor follower address setup?

Outdoor addresses manually set up are duplicated

What are the check items (position) for a duplicated outdoor follower address setup?

• Do not set up the outdoor address manually

What is the check code name for a decreased number of connected outdoor units?

E26

What is the detected position for a decreased number of connected outdoor units?

I/F

What is the status for a decreased number of connected outdoor units?

All stop

What is the error detection condition for a decreased number of connected outdoor units?

The signal was not returned for constant from the outdoor unit which was receiving signal

What are the check items (position) for a decreased number of connected outdoor units?

• Outdoor backup is being set
• Check power supply of outdoor unit (Is power supplied?)
• Check connection or disconnection of connecting wire between outdoor units
• Check connection of connector for outdoor P.C. board communication
• Check outdoor P.C. board (I/F) error

What is the check code name for an outdoor follower unit error?

E28

What is the detected position for an outdoor follower unit error?

I/F

What is the status for an outdoor follower unit error?

All stop

What is the error detection condition for an outdoor follower unit error?

Outdoor header unit received error code from outdoor follower unit

What are the check items (position) for an outdoor follower unit error?

• Check the check code of outdoor follower unit

What is the check code name for an IPDU communication error?

E31

What is the detected position for an IPDU communication error?

I/F

What is the status for an IPDU communication error?

All stop

What is the error detection condition for an IPDU communication error?

Communication of each IPDU (P.C. board) in inverter box interrupted

What are the check items (position) for an IPDU communication error?

• Check connection of communication connector and disconnection between IPDU and I/F P.C. board
• Check outdoor P.C. board (I/F, IPDU, Fan IPDU) error
• Check external noise

What is the check code name for an indoor TCJ sensor error?

F01

What is the detected position for an indoor TCJ sensor error?

Indoor unit

What is the status for an indoor TCJ sensor error?

Corresponding unit only stops

What is the error detection condition for an indoor TCJ sensor error?

• Resistance value of sensor is infinite or zero (Open/Short)

What are the check items (position) for an indoor TCJ sensor error?

• Check connection/cabling of TCJ sensor connector
• Check characteristics of TCJ sensor resistance value
• Check indoor P.C. board error

What is the check code name for an indoor TC2 sensor error?

F02

What is the detected position for an indoor TC2 sensor error?

Indoor unit

What is the status for an indoor TC2 sensor error?

Corresponding unit only stops

What is the error detection condition for an indoor TC2 sensor error?

• Resistance value of sensor is infinite or zero (Open/Short)

What are the check items (position) for an indoor TC2 sensor error?

• Check connection/cabling of TC2 sensor connector
• Check characteristics of TC2 sensor resistance value
• Check indoor P.C. board error

What is the check code name for an Indoor TC1 sensor error?

F03

What is the detected position for an Indoor TC1 sensor error?

Indoor unit

What is the status for an Indoor TC1 sensor error?

Corresponding unit only stops

What is the error detection condition for an Indoor TC1 sensor error?

• Resistance value of sensor is infinite or zero (Open/Short)

What are the check items (position) for an Indoor TC1 sensor error?

• Check connection/cabling of TC1 sensor connector
• Check characteristics of TC1 sensor resistance value
• Check indoor P.C. board error

What is the check code name for a TD1 sensor error?

F04

What is the detected position for a TD1 sensor error?

I/F

What is the status for a TD1 sensor error?

All stop

What is the error detection condition for a TD1 sensor error?

• Resistance value of sensor is infinite or zero (Open/Short)

What are the check items (position) for a TD1 sensor error?

• Check connection of TD1 sensor connector
• Check characteristics of TD1 sensor resistance value
• Check outdoor P.C. board (I/F) error

What is the check code name for a TD2 sensor error?

F05

What is the detected position for a TD2 sensor error?

I/F

What is the status for a TD2 sensor error?

All stop

What is the error detection condition for a TD2 sensor error?

• Resistance value of sensor is infinite or zero (Open/Short)

What are the check items (position) for a TD2 sensor error?

• Check connection of TD2 sensor connector
• Check characteristics of TD2 sensor resistance value
• Check outdoor P.C. board (I/F) error

What is the check code name for a TE1 sensor error?

F06

What is the detected position for a TE1 sensor error?

I/F

What is the status for a TE1 sensor error?

All stop

What is the error detection condition for a TE1 sensor error?

• Resistance value of sensor is infinite or zero (Open/Short)

What are the check items (position) for a TE1 sensor error?

• Check connection of TE1 sensor connector
• Check characteristics of TE1 sensor resistance value
• Check outdoor P.C. board (I/F) error

What is the check code name for a TL sensor error?

F07

What is the detected position for a TL sensor error?

I/F

What is the status for a TL sensor error?

All stop

What is the error detection condition for a TL sensor error?

• Resistance value of sensor is infinite or zero (Open/Short)

What are the check items (position) for a TL sensor error?

• Check connection of TL sensor connector
• Check characteristics of TL sensor resistance value
• Check outdoor P.C. board (I/F) error

What is the check code name for a TO sensor error?

F08

What is the detected position for a TO sensor error?

I/F

What is the status for a TO sensor error?

All stop

What is the error detection condition for a TO sensor error?

• Resistance value of sensor is infinite or zero (Open/Short)

What are the check items (position) for a TO sensor error?

• Check connection of TO sensor connector
• Check characteristics of TO sensor resistance value
• Check outdoor P.C. board (I/F) error

What is the check code name for an indoor TA sensor error?

F10

What is the detected position for an indoor TA sensor error?

Indoor

What is the status for an indoor TA sensor error?

Corresponding unit only stops

What is the error detection condition for an indoor TA sensor error?

• Resistance value of sensor is infinite or zero (Open/Short)

What are the check items (position) for an indoor TA sensor error?

• Check connection/cabling of TA sensor connector
• Check characteristics of TA sensor resistance value
• Check indoor P.C. board error

What is the check code name for a TS1 sensor error?

F12

What is the detected position for a TS1 sensor error?

I/F

What is the status for a TS1 sensor error?

All stop

What is the error detection condition for a TS1 sensor error?

• Resistance value of sensor is infinite or zero (Open/Short)

What are the check items (position) for a TS1 sensor error?

• Check connection of TS1 sensor connector
• Check characteristics of TS1 sensor resistance value
• Check outdoor P.C. board (I/F) error

What is the check code name for a TH sensor error?

F13

What is the detected position for a TH sensor error?

IPDU

What is the status for a TH sensor error?

All stop

What is the error detection condition for a TH sensor error?

Nothing

What are the check items (position) for a TH sensor error?

• IGBT built-in temp sensor error → Exchange IPDU P.C. board

How do I detach the suction grille?

1. Stop operation of the air conditioner and then turn off the switch of the breaker.
2. Slide the 2 knobs of the suction grille inward and then hang down the suction grille.
3. Remove a strap connecting the panel and the suction grille and then remove the suction grille.

How do I attach the suction grille?

1. Hook the suction grille to the panel.
2. Attach the strap of the suction grille to the panel as before.
3. Close the suction grille, slide the knobs outward and then fix the panel.

How do I detach the electric parts cover?

1. Stop operation of the air conditioner and then turn off the switch of the breaker.
2. Remove the fixing screw A which fixes the electric parts cover and loosen the fixing screw B.
3. Pull down the electric parts cover, remove the pin of the bell mouth and then slide it to the arrow direction in order to open the claws and the electric parts box cover.

How do I attach the electric parts cover?

1. Close the electric parts cover and slide it, hook the claw of the electric parts box, the claw of the electric parts box cover and the Dharma doll hole, and then insert the pin of the bell mouth into the hole of the electric parts box cover.
2. Tighten the fixing screws A and B and then fix the electric parts box cover.
3. Mount the suction grille as before.

How do I detach the adjust corner cap?

1. Pull the knob of the adjust corner cap to the arrow direction, remove the strap of the adjust corner cap from the pin of the panel and then remove all the 4 corners of the cap.

How do I attach the adjust corner cap?

1. Hook the strap of the adjust corner cap securely to the pin of the ceiling panel.
2. Insert the claw of the adjust corner cap into the square hole of the panel. (2 positions)
3. Push the claws of the adjust corner cap into the positions indicated with arrow marks so that they fit in 3 positions.

How do I detach the ceiling panel?

1. Stop operation of the air conditioner and then turn off the switch of the breaker.
2. Remove the fixing screw A which fixes the electric parts cover and loosen the fixing screw B.
3. Pull down the electric parts cover, remove the pin of the bell mouth and then slide it to the arrow direction in order to open the claws and the electric parts box cover.
4. Pull the knob of the adjust corner cap to the arrow direction, remove the strap of the adjust corner cap from the pin of the panel and then remove all the 4 corners of the cap.
5. Remove the flap connector (CN510, White, 20P) connected to the control P.C. board and then remove the lead wire from the clamp.
6. Loosen the panel fixing 4 screws.
7. Slide the panel fixing brackets (4 positions) outward.
8. Push the tentative bracket outward and then remove the ceiling panel.

How do I attach the ceiling panel?

1. Insert the tentative brackets (2 positions) of the ceiling panel into square holes of the indoor unit and then hook the panel tentatively.
2. Pass the head of the panel fixing screw through the hole of the panel fixing bracket and then slide the panel fixing bracket inward.
3. Tighten in the panel fixing screw to fix the ceiling panel.
4. Attach the adjust corner cap as before.
5. Connect the louver connector (CN510, White, 20P) as before and then fix the lead wire with the clamp.
6. Mount the electric parts box cover and the suction grille as before.

How do I detach the Control P.C. board?

1. Stop operation of the air conditioner and then turn off the switch of the breaker.
2. Remove the fixing screw A which fixes the electric parts cover and loosen the fixing screw B.
3. Pull down the electric parts cover, remove the pin of the bell mouth and then slide it to the arrow direction in order to open the claws and the electric parts box cover.
4. Remove connectors which are connected from the control P.C. board to the other parts and then remove wiring from the clamp.
5. Unlock the locks of the card edge spacer (6 positions) and then remove the control P.C. board.

How do I attach the Control P.C. board?

1. Fix the control P.C. board to the card edge spacer (6 positions)
2. Connect the connector removed as before and then fix the wiring with the clamp.
3. Mount the electric parts box cover and the suction grille as before.

What are the check codes for the main remote controller?

• L05
• L06
• L07
• L08
• L09
• L10
• L17
• L18
• L20
• L28
• L29
• L30
• L31
• P01
• P03
• P04
• P05
• P07
• P10
• P12
• P13
• P15
• P17
• P19
• P20
• P22
• P26
• P29
• P31

What are the check codes for the outdoor 7-segment display?

• L06
• L08
• L10
• L17
• L18
• L28
• L29
• L30
• P03
• P04
• P05
• P07
• P10
• P13
• P15
• P17
• P19
• P20
• P22
• P26
• P29

What is the check code name for L06?

No. of indoor units with priority

What is the auxiliary code for L29?

• 01: IPDU1 error
• 02: IPDU2 error
• 03: IPDU1, 2 errors
• 04: Fan IPDU error
• 05: IPDU1 + Fan IPDU error
• 06: IPDU2 + Fan IPDU error
• 07: All IPDU error or communication error between IPDU and I/F P.C. board, or outdoor I/F P.C. board error

What is the check code name for L30?

Detected indoor address

What is the check code name for L31?

Detected position

What is the status for duplicated indoor units with priority (displayed on indoor unit with priority)?

All stop

What is the error detection condition for duplicated indoor units with priority (displayed on indoor unit with priority)?

Indoor units with priority were duplicated.

What is the check item (position) for duplicated indoor units with priority (displayed on indoor unit with priority)?

• Check display of indoor unit with priority.
• Check display of indoor unit with priority and outdoor unit.

What is the status for duplicated indoor units with priority (displayed on the unit other than indoor unit with priority)?

All stop

What is the error detection condition for duplicated indoor units with priority (displayed on the unit other than indoor unit with priority)?

Indoor units with priority were duplicated.

What is the status for group line in individual indoor unit?

Corresponding unit only stops.

What is the error detection condition for group line in individual indoor unit?

At least one indoor unit connected to a group existed in the individual indoor units.

What is the check item (position) for group line in individual indoor unit?

• Check indoor address.

What is the status for Indoor group/address unset?

Corresponding unit only stops.

What is the error detection condition for Indoor group/address unset?

Address was not yet set up.

What is the check item (position) for Indoor group/address unset?

• Check indoor address. Note) After installation, this code is displayed when the power is firstly turned on.

What is the status for indoor capacity unset?

Corresponding unit only stops.

What is the error detection condition for Indoor capacity unset?

Indoor unit capacity was unset.

What is the check item (position) for Indoor capacity unset?

Set up indoor capacity. (DN=11)

What is the status for outdoor capacity unset?

All stop

What is the error detection condition for outdoor capacity unset?

On the I/F P.C. board for service, jumper line was not cut according to the model.

What is the check item (position) for outdoor capacity unset?

Check model setup on outdoor I/F P.C. board A’ssy for service.

What is the status for inconsistent models of outdoor units?

Corresponding unit only stops.

What is the error detection condition for inconsistent models of outdoor units?

When outdoor unit models are intermingled. When 1/2 series of SHRM was intermingled.

What is the check item (position) for inconsistent models of outdoor units?

• Check outdoor units.

What is the status for FS unit system error?

All stop

What is the error detection condition for FS unit system error?

An indoor unit which is not connected with the FS unit is driving without setup for cooling only mode.

What is the check item (position) for FS unit system error?

• Check setup of remote controller (DN=[OFF]).
• Check FS unit.
• Check pipe connection to FS unit. (Mispiping between discharge gas and suction gas) Check miswiring/misinstallation of SVS/SVD valves.

What is the status for duplicated central control addresses?

All stop

What is the error detection condition for duplicated central control addresses?

Duplicated central control addresses

What is the check item (position) for duplicated central control addresses?

• Check central control address.

What is the status for quantity over of connected outdoor units?

All stop

What is the error detection condition for quantity over of connected outdoor units?

There were more than four outdoor units.

What is the check item (position) for quantity over of connected outdoor units?

• Check network adaptor P.C. board. (In case of TCC-Link)
• Check No. of connected outdoor units. (Max. 4 units per 1 system)

What is the status for IPDU quantity error?

Corresponding unit only stops.

What is the error detection condition for IPDU quantity error?

No. of IPDU units detected when power was turned on were less.

What is the check item (position) for IPDU quantity error?

• Check communication line between outdoor units.
• Check outdoor P.C. board (I/F) error.

What is the status for Interlock in indoor unit from outside?

Operation continues.

What is the error detection condition for Interlock in indoor unit from outside?

• Outside error input terminal Detected signal to (CN80) for more 1 minute

What is the check item (position) for Interlock in indoor unit from outside?

• Check model setup for outdoor I/F service P.C. board.
• Check connection of UART communication connector.
• Check IPDU, fan IPDU, and I/F P.C. board error. Note) UART: Universal Asynchronous Receiver Transmitter
• Outside device is connected to connector (CN80): 1) Check outside device error. 2) Check indoor P.C. board error.
• Outside device is not connected to connector (CN80): 1) Check indoor P.C. board error.

What is the status for extended IC (Integrated Circuit) error?

All stop

What is the check item (position) for extended IC (Integrated Circuit) error?

Check indoor (I/F) P.C. board.

What is the check code name for P01?

Indoor fan motor error

What is the status for indoor fan motor error (P01)?

Corresponding unit only stops.

What is the error detection condition for indoor fan motor error (P01)?

• The value of motor speed deviated from the target value was detected for a certain time.
• Over-current protection operated.

What is the check item (position) for indoor fan motor error (P01)?

• Check the lock of the fan motor (AC fan).
• Check cabling.

What is the check code name for P03?

Discharge temp TD1 error

What is the status for discharge temp TD1 error?

All stop

What is the error detection condition for discharge temp TD1 error?

Discharge temp (TD1) exceeded 115°C.

What is the check item (position) for discharge temp TD1 error?

• Check full opening of outdoor service valves (Gas side, Liquid side).
• Check clogging of outdoor PMV. (PMV1,2)
• Check characteristics of TD1 sensor resistance value.
• Check refrigerant shortage.
• Check 4-way valve error.
• Check leakage of SV4 circuit.
• Check SV4 circuit. (Miswiring and misinstallation of SV41 and SV42)

What is the auxiliary code for P04?

• 01: Compressor 1 side
• 02: Compressor 2 side

What is the check code name for P04?

Actuation of high-pressure SW

What is the status for actuation of high-pressure SW?

All stop

What is the error detection condition for actuation of high-pressure SW?

High-pressure SW actuated.

What is the check item (position) for actuation of high-pressure SW?

• Check connection of high-pressure SW connector.
• Check Pd pressure sensor error.
• Check full opening of outdoor service valves (Gas side, Liquid side).
• Check outdoor fan error.
• Check outdoor fan motor error.
• Check clogging of outdoor PMV. (PMV1,2)
• Check clogging of indoor/outdoor heat exchangers.
• Check short-circuiting of outdoor suction/discharge air.
• Check clogging of SV2 circuit.
• Check outdoor P.C. board (I/F) error.
• Check indoor fan system error. (Cause of air volume decrease)
• Check opening of indoor PMV.
• Check miscabling of communication line between indoor and outdoor.
• Check operation error of the check valve of the discharge pipe.
• Check SV4 valve circuit.
• Check SV5 valve circuit.
• Check refrigerant overcharge.

What is the auxiliary code for P05?

• 01: Power supply open phase
• 02: Power supply negative phase

What is the check code name for P05?

Open phase negative phase

What is the status for Open phase negative phase?

All stop

What is the error detection condition for Open phase negative phase?

• Open phase was detected when the power turned on.
• Negative phase was detected when the power turned on.

What is the check item (position) for Open phase negative phase?

• Check outdoor power line.
• Check outdoor P.C. board (I/F) error.
• Check power voltage.

What is the auxiliary code for P07?

• 01: Compressor 1 side
• 02: Compressor 2 side

What is the check code name for P07?

Heat sink overheat error

What is the status for heat sink overheat error?

All stop

What is the error detection condition for heat sink overheat error?

IGBT built-in temp sensor (TH) was overheated.

What is the check item (position) for heat sink overheat error?

• Check outdoor fan system error.
• Check clogging of heat sink cooling duct.
• Check fixation between IGBT and heat sink. (Check screwing and contact.)
• Check IPDU error.(IGBT built-in temp sensor (TH) error).

What is the check code name for P10?

Indoor overflow error

What is the status for Indoor overflow error?

All stop

What is the error detection condition for Indoor overflow error?

• Float switch operated.
• Float switch circuit disconnected or the connector came off.

What is the check item (position) for Indoor overflow error?

• Check the float switch connector.
• Check the operation of the drain pump unit.
• Check the drain pump circuit.
• Check clogging of the drain pipe.

What is the check code name for P12?

Indoor fan motor error

What is the status for Indoor fan motor error (P12)?

Corresponding unit only stops.

What is the check item (position) for Indoor fan motor error (P12)?

• Check indoor P.C. board error.
• Check connection of fan connector and wiring.
• Check fan motor error.

What is the check code name for P13?

Outdoor liquid back detection error

What is the status for Outdoor liquid back detection error?

All stop

What is the error detection condition for Outdoor liquid back detection error?

<In cooling> While the system operated in cooling mode, the high status of high-pressure value was detected in the stopped follower unit. <In heating> While the system is operating in HEAT mode, outdoor PMV of which opening degree was 100 pulses or less for a certain time.

What is the check item (position) for Outdoor liquid back detection error?

• Check full close operation of outdoor PMV (1, 2).
• Check Pd and Ps sensor error.
• Check clogging of the SV2 circuit.
• Check clogging of the balance pipe.
• Check clogging of the SV3B circuit.
• Check outdoor P.C. board (I/F) error.
• Check capillary clogging of oil return circuit from oil separator.
• Check leakage of the stop valve in discharge assembly part.

What is the auxiliary code for P15?

• 01: TS condition
• 02: TD condition

What is the check code name for P15?

Gas leak detection (TS1 condition)

What is the status for gas leak detection (TS1 condition)?

All stop

What is the error detection condition for gas leak detection (TS1 condition)?

Protective stop which generates when the status that suction temperature is over the judgment standard temperature continued for 10 minutes was repeated for 4 times or more. <TS error judgment standard temperature> In cooling operation: 60°C or higher In heating operation: 40°C or higher

What is the check item (position) for gas leak detection (TS1 condition)?

• Check refrigerant shortage.
• Check full open of outdoor service valves (gas side, liquid side).
• Check outdoor PMV clogging (PMV1, 2).
• Check characteristics of TS1 sensor resistance value.
• Check 4-way valve error.
• Check leakage of the SV4 circuit.

What is the check code name for P17?

Gas leak detection (TD condition)

What is the status for Gas leak detection (TD condition)?

All stop

What is the error detection condition for Gas leak detection (TD condition)?

Protective stop which generates when the status that while the compressor is under low-frequency operation, the discharge temperature TD1 or TD2 detected 108°C or more continuously for 10 minutes was repeated for 4 times or more.

What is the check item (position) for Gas leak detection (TD condition)?

• Check refrigerant shortage.
• Check outdoor PMV clogging (PMV1, 2).
• Check characteristics of TD1, TD2 sensor resistance value.
• Check indoor air filter clogging.
• Check pipe clogging.
• Check the SV4 circuit (Valve leakage, misinstallation)

What is the check code name for P19?

Discharge temp TD2 error

What is the status for Discharge temp TD2 error?

All stop

What is the error detection condition for Discharge temp TD2 error?

Protective stop which generates when the discharge temperature (TD2) was over 115°C was repeated for 4 times or more.

What is the check item (position) for Discharge temp TD2 error?

• Check full opening of outdoor service valves (gas side, liquid side).
• Check clogging of outdoor PMV (PMV1, 2).
• Check characteristics of TD2 sensor resistance value.
• Check 4-way valve error.
• Check leakage of the SV4 circuit.
• Check the SV4 circuit. (Miscabling and misinstallation of SV41 and SV42)

What is the check code name for P20?

4-way valve operation error

What is the status for 4-way valve operation error?

All stop

What is the error detection condition for 4-way valve operation error?

When abnormal refrigerating cycle data was detected in heating

What is the check item (position) for 4-way valve operation error?

• Error of 4-way valve error.
• Check coil error and connector connection of 4-way valve.
• Check characteristics of TS1/TE1 sensor resistance value.
• Check characteristics of Pd, Ps pressure sensor output voltage.
• Check misconnection of TE1 and TL sensors.

What is the auxiliary code for P22?

• 08: Out of step
• 0A: IDC operation
• 0E: Synchronous error
• 0F: Braking error
• 06: Max. rpm over
• 04: rpm difference error
• 0D: Lock
• 0C: Fan lock

What is the check code name for P22?

Outdoor fan IPDU error

What is the status for Outdoor fan IPDU error (auxiliary code: 08)?

All stop

What is the error detection condition for Outdoor fan IPDU error (auxiliary code: 08)?

(Auxiliary code: 08) Fan IPDU position detection circuit Position detection was not normally performed.

What is the check item (position) for Outdoor fan IPDU error (auxiliary code: 08)?

• Fan motor check
• Connection check of the connector for the fan motor
• Error check of the IPDU P.C. board for the fan

What is the status for Outdoor fan IPDU error (auxiliary code: 0A)?

All stop

What is the error detection condition for Outdoor fan IPDU error (auxiliary code: 0A)?

(Auxiliary code: 0A) Fan IPDU over-current protective circuit When the fan started and while it is operating, the status that current flows over constant flow was detected

What is the check item (position) for Outdoor fan IPDU error (auxiliary code: 0A)?

• Fan motor check
• Error check of the IPDU P.C. board for the fan

What is the status for Outdoor fan IPDU error (auxiliary code: 0E)?

All stop

What is the error detection condition for Outdoor fan IPDU error (auxiliary code: 0E)?

(Auxiliary code: 0E) Fan IPDU position detection circuit Position detection was not normally performed.

What is the check item (position) for Outdoor fan IPDU error (auxiliary code: 0E)?

• Fan motor check
• Connection check of the connector for the fan motor
• Error check of the IPDU P.C. board for the fan

What is the status for Outdoor fan IPDU error (auxiliary code: 0F)?

All stop

What is the error detection condition for Outdoor fan IPDU error (auxiliary code: 0F)?

(Auxiliary code: 0F) Fan IPDU position detection circuit Position detection was not normally performed.

What is the check item (position) for Outdoor fan IPDU error (auxiliary code: 0F)?

• Fan motor check
• Connection check of the connector for the fan motor
• Error check of the IPDU P.C. board for the fan

What is the status for Outdoor fan IPDU error (auxiliary code: 06)?

All stop

What is the error detection condition for Outdoor fan IPDU error (auxiliary code: 06)?

(Auxiliary code: 06) External cause such as blast Position detection was not normally performed. (Restart after 6 seconds)

What is the check item (position) for Outdoor fan IPDU error (auxiliary code: 06)?

• Fan motor check
• Connection check of the connector for the fan motor

What is the status for Outdoor fan IPDU error (auxiliary code: 04)?

All stop

What is the error detection condition for Outdoor fan IPDU error (auxiliary code: 04)?

(Auxiliary code: 04) External cause such as blast When the difference between target rpm and real rpm is 25% or more (Restart after 6 seconds)

What is the check item (position) for Outdoor fan IPDU error (auxiliary code: 04)?

• Fan motor check
• Connection check of the connector for the fan motor

What is the status for Outdoor fan IPDU error (auxiliary code: 0D)?

All stop

What is the error detection condition for Outdoor fan IPDU error (auxiliary code: 0D)?

(Auxiliary code: 0D) Fan IPDU position detection circuit Position detection was not normally performed. (Windless status)

What is the check item (position) for Outdoor fan IPDU error (auxiliary code: 0D)?

• Fan motor check
• Connection check of the connector for the fan motor
• Error check of the IPDU P.C. board for the fan

What is the status for Outdoor fan IPDU error (auxiliary code: 0C)?

All stop

What is the error detection condition for Outdoor fan IPDU error (auxiliary code: 0C)?

(Auxiliary code: 0C) External cause such as blast Position detection was not normally performed. (Windy status) (Restart after 6 seconds)

What is the check item (position) for Outdoor fan IPDU error (auxiliary code: 0C)?

• Fan motor check
• Connection check of the connector for the fan motor

What is the auxiliary code for P26?

• 01: Compressor 1 side
• 02: Compressor 2 side

What is the check code name for P26?

G-Tr short-circuit protection error

What is the status for G-Tr short-circuit protection error?

All stop

What is the error detection condition for G-Tr short-circuit protection error?

Instantaneous over-current was detected when the compressor started.

What is the check item (position) for G-Tr short-circuit protection error?

• Check connector connection and wiring on the IPDU P.C. board.
• Check compressor error and defect of the compressor coil.
• Check outdoor P.C. board (IPDU) error.

What is the auxiliary code for P29?

• 01: Compressor 1 side
• 02: Compressor 2 side

What is the check code name for P29?

Compressor position detection circuit error

What is the status for Compressor position detection circuit error?

All stop

What is the error detection condition for Compressor position detection circuit error?

Position was not normally detected.

What is the check item (position) for Compressor position detection circuit error?

• Check connector connection and wiring.
• Check compressor error and defect of the compressor coil.
• Check P.C. board (IPDU) error.

What is the check code name for P31?

Other indoor error (Group follower unit error)

What is the status for Other indoor error (Group follower unit error)?

Corresponding unit only stops.

What is the error detection condition for Other indoor error (Group follower unit error)?

E07/L07/L03/L08 was detected when another indoor unit in the group was defective.

What is the check item (position) for Other indoor error (Group follower unit error)?

• Check indoor P.C. board.

What is the check code for C05 which is displayed on the central control device?

TCC-LINK central control device transmission error

What is the status for TCC-LINK central control device transmission error (C05)?

Operation continued.

What is the error detection condition for TCC-LINK central control device transmission error (C05)?

Signal is not transmitted from the central control device.

What is the check item (position) for TCC-LINK central control device transmission error (C05)?

• Check central control device error.
• Check communication line error of the central control device.
• Check setup of terminator resistor.

What is the check code for C06 which is displayed on the central control device?

TCC-LINK central control device transmission error

What is the status for TCC-LINK central control device transmission error (C06)?

Operation continued.

What is the error detection condition for TCC-LINK central control device transmission error (C06)?

Signal is not received from the central control device.

What is the check item (position) for TCC-LINK central control device transmission error (C06)?

• Check central control device error.
• Check communication line error of the central control device.
• Check setup of the terminator resistor.

What is the check code for C12 which is displayed on the central control device?

General-purpose controller control Interface batched alarm

What is the status for General-purpose controller control Interface batched alarm?

Operation continued.

What is the error detection condition for General-purpose controller control Interface batched alarm?

Error was input in general-purpose equipment control interface.

What is the check item (position) for General-purpose controller control Interface batched alarm?

• Check the power of connecting destination connected device.
• Check P.C. board error of the connected device.
• Check error input.

What is the check code for P30 which is displayed on the central control device?

Follower unit error of group control

What is the status for Follower unit error of group control?

Operation continued.

What is the error detection condition for Follower unit error of group control?

An error occurred in the follower unit of the group control. ([P30] is displayed only on the central remote controller.)

What is the check item (position) for Follower unit error of group control?

• Check the check code of the unit with alarm.

What is the check code for duplicated central control address which is displayed on the central control device?

Duplicated central control address

What is the status for duplicated central control address?

Operation continued.

What is the error detection condition for duplicated central control address?

Central control addresses were duplicated.

What is the check item (position) for duplicated central control address?

• Check the address setup.

What are the temperature sensor characteristics?

0 10 20 10 20 30 40 50 Characteristic-1 Temperature [˚C] Indoor TA sensor R es is ta nc e [k W ] 50 0 100 150 200 5 0 10 15 20 -20 -30 -10 0 10 20 30 40 50 60 70 80 90 100 Characteristic-2 Temperature [˚C] Indoor TC1, TC2, TCJ sensors R es is ta nc e [k W ] ( 10 ˚C o r lo w er ) R es is ta nc e [k W ] (1 0˚ C o r hi gh er )

How do you detach the drain cap?

1. Carry out work of item 1 of 1.
2. Loosen screws (3 positions) fixing the drain cap (outside) and then turn the drain cap to the arrow mark direction to remove it.
   • NOTE: The drain cap is hung down because a strap is attached to it (outside).
3. Loosen the cap by turning the drain cap (inside) for approx. 1 turn to OPEN → direction and then drain the drain water accumulated in the drain pan.
   • NOTE: Be sure to catch drain water using a bucket, etc. when loosening the drain cap.
4. Turn the drain cap once again to OPEN → direction to remove it.

What should you be careful of with the insulating materials?

The insulating materials are adhered to the drain cap (outside) and opening part of the drain pan; be careful that they are not come off. If they are come off, stick them as before using double-faces tape, etc.

How do you attach the drain cap?

1. Insert the drain cap (inside), turn it to CLOSE → direction until the position where “Clashed sound” is heard and it cannot be turned more over (Position where mark of the drain pan matches with mark of the drain cap (inside)) and then fix it.
   • NOTE: When attaching the drain cap (inside), remove dirt attached to the packing. And tighten in it noting so that the cap is not slantingly set. If attaching the drain cap as dust or dirt is attached or the cap is set slantingly, water leakage is caused.
2. Turn the drain cap (outside) to → direction and then attach it using the fixing screw as original.
3. Following to work of item 2 of 1, mount the suction grille as before.

How do you detach the fan motor?

1. Carry out work of item 1 of 2.
2. Remove connectors which are connected from the control P.C. board to the other parts and then remove each wiring from the clamp.
   • CN510 : Louver motor (20P, White)
   • CN34 : Float switch (3P, Red)
   • CN504 : Drain pump (2P, White)
   • CN100 : TC1 sensor (3P, Brown)
   • CN101 : TC2 sensor (2P, Black)
   • CN102 : TCJ sensor (2P, Red)
   • CN104 : Room temp. Sensor (2P, Yellow)
   • CN333 : Fan motor power supply (5P, White)
   • CN334 : Fan motor position detection (3P, White)
   • CN82 : PMV (6P, Blue)
   • NOTE: Unlock the lock of the housing part and then remove the connector.
3. Remove the fixing screws A and B, and then remove the electric parts box. (Fixing screw A: Ø4 × 10, 3 pcs, Fixing screw B: Ø4 × 8, 1 pc.)
4. Remove the fan motor lead, TC sensor and TCJ sensor from clamp of the bell mouth.
5. Remove the fixing screws and then remove the bell mouth. (Ø4 × 10, 8 pcs.)
6. Remove the fixing screws and then remove the nut cap. (Ø4 × 10, 2 pcs.)
7. Remove the fixing nut and then remove the turbo fan. (M8 nut with flange, 1 pc.)
8. Remove the fixing screws and then remove the motor lead holding bracket. (Ø4 × 8, 2 pcs.)
9. Cut the bundling band and then remove it from the clamp.
10. Remove the fixing nut and then remove the fan motor. (Ø6 nut, 3 pcs.)

How do you attach the fan motor?

1. Fix the parts as before in order of fan motor → motor lead holding bracket → turbo fan → nut cap → bell mouth.
   • NOTE: Fix the motor lead to the clamp without slack as before using bundling band. When fixing the turbo fan, be sure to match the D-cut of the fan boss with D-cut of the motor shaft. Using a torque wrench, fix the turbo fan and tighten it to 5.4 Nm. Using torque wrench, fix the fan motor (at 3 positions) and tighten it to 4.9 Nm.
2. Fix the fan motor lead, TC sensor and TCJ sensor with the clamp of the bell mouth.
3. Mount the electric parts box with the fixing screws A and B. (Ø4 × 10, 3 pcs. Ø4 × 8, 1 pc.)
4. Connect the connector removed in item 1 as before and then fix wiring with the clamp.
5. Following to work of item 2 of 2, mount the electric parts box cover and the suction grille as before.

What caution should you take when exchanging fan motors?

When exchanging the fan motors of the models MMU-AP0092H to AP0320H, take off lead wire from the clamp filter, which is connected to CN334 of the fan motor to be exchanged and then connect the removed lead wire to a new fan motor.

How do you detach the drain pump?

1. Carry out works of item 1 of 2 and item 1 of 6.
2. Remove the drain pump connector (CN504, White, 2P) connected to the control P.C. board and then remove the lead wire from the clamp.
3. Remove the fixing screws and then remove the drain pump. (Ø4 × 10, 3 pcs.)
4. As shown in the right figure, first pull out the connecting part of the drain pump and the drain hose from the drain port and then take out the drain pump.
5. Set direction of the knob of the hose band downward, slide it from the pump connecting part to the hose side and then remove the drain hose from the drain pump.
6. Pass the connector of the drain pump lead wire through the wiring taking-out port and then take out the drain pump.

How do you attach the drain pump?

1. Enter your hand into the drain port and pass the connector of the drain pump lead wire through the wiring taking-out port.
2. Connect the drain hose to the drain pump as before.
   • NOTE: Insert the drain hose up to the end of the drain pump connecting part, apply band to the white mark position of the hose and then set the band knob upward.
3. Return the drain pump to the indoor unit and then mount it as before using the fixing screws. (Ø4 × 10, 3 pcs.)
4. Connect the drain pump connector (CN504, White, 2P) to the control P.C. board and then fix it as before with the clamp.
5. Following to words of item 2 of 6 and item 2 of 2, mount the drain cap, the electric parts box cover and the suction grille as before.

How do you detach the float switch assembly?

1. Carry out works of item 1 of 7 and works from 1) to 5).
2. Remove the fixing screw and then remove the float switch assembly. (Ø4 × 25, 1 pc.)

How do you attach the float switch assembly?

1. Mount the float switch assembly as before with the fixing screw.
   • NOTE: When mounting, match hole of the float switch assembly with projection of the drain pan.
2. Mount the bell mouth as before. (Ø4 × 10, 8 pcs.)
3. Following to works of item 2 of 7 and works from 2) to 5), attach the parts as before.

How do you detach the drain pan?

1. Carry out works of item 1 of 4, item 1 of 6, item 1 of 7 and works from 2) to 5).
2. Remove the fixing screws to remove the drain pan. (Ø4 ×10, 4 pcs.)

How do you attach the drain pan?

1. Fix parts as before in order of drain cap → drain pan → bell mouth.
2. Following to works of item 2 of 7 and works from 2) to 5), attach the parts as before.

How do you detach the PMV motor?

1. Carry out work of item 1 of 10.
2. Remove the relay connector of PMV motor.
3. Peel the butyl rubber adhered to the main unit of the pulse motor valve (PMV) until PMV can be seen and then loosen the nuts fixing PMV motor with double spanner to remove PMV motor.

How do you attach the PMV motor?

1. Mount PMV motor and relay connector as before.
   • NOTE: Control the tightening torque for the PMV body and PMV motor to 7.84 ± 0.98Nm.

How do you detach the heat exchanger?

1. Recover the refrigerant gas.
2. Carry out work of item 1 of 10.
3. Remove refrigerant pipe at indoor unit side.
4. Remove the fixing screws and then remove the piping cover. (Ø4 ×10, 3 pcs.)
5. Remove the drain hose from the drain pump and remove the fixing screws to remove the drain pump stand. (Ø4 ×8, 3 pcs.)
6. While pushing the heat exchanger, remove the fixing band, fixing screws and the heat exchanger. (Ø4 ×8, 3 pcs.)

How do you attach the heat exchanger?

1. Mount the heat exchanger with the fixing band and the fixing screws. (Ø4 ×8, 3 pcs.)
2. Fix the parts as before in order of drain pump stand → piping cover.
3. Connect the refrigerant pipe as before and then apply vacuuming.
4. Following to work of item 2 of 10, attach the parts as before.

What is the caution when working on the MMU-AP ✻✻✻ ✻✻✻ 2H models?

For the above models, set the CODE No. to “
 ” and the setting data 0000 (initial) to “0001”.

What should you note when replacing the P.C. board for indoor unit servicing?

The nonvolatile memory (hereafter called EEPROM, IC503) on the indoor unit P.C. board before replacement includes the model specific type information and capacity codes as the factory-set value and the important setting data which have been automatically or manually set when the indoor unit is installed, such as system/indoor/group addresses, high ceiling select setting, etc. When replacing the P.C. board for indoor unit servicing, follow the procedures below.

After replacement completes, confirm whether the settings are correct by checking the indoor unit No., Group header unit/follower unit settings and perform the cooling cycle confirmation through the trial operation.

What are the replacement procedures in Case 1?

Before replacement, the indoor unit can be turned on and the setting data can be read out by wired remote controller operation.

• EEPROM data read out
• Replacement of P.C. board for indoor unit servicing and power on
• Writing the read out EEPROM data
• Power reset (for all indoor units connected the remote controller when the group operation control is performed.)

What are the replacement procedures in Case 2?

The EEPROM before replacement is defective and the setting data cannot be read out.

• Replacement of P.C. board for indoor unit servicing and power on
• Writing the setting data to EEPROM such as high ceiling installation setting and optional connection setting, etc., based on the customer information.
• Power reset (for all indoor units connected to the remote controller when the group operation control is performed.)

What is the Part code for MMU-AP ✻✻✻ ✻✻✻ 2H series?

431-6V-379

What is the P.C. board for MMU-AP ✻✻✻ ✻✻✻ 2H series?

MCC-1570

How do you read out setting data from the EEPROM?

The setting data modified on the site, other than factory-set value, stored in the EEPROM shall be read out.

• Step 1: Push SET, CL and TEST buttons on the remote controller simultaneously for more than 4 seconds.
  • When the group operation control is performed, the unit No. displayed for the first time is the header unit No. At this time, the CODE No. (DN) shows “ ”. Also, the fan of the indoor unit selected starts its operation and the swing operation also starts if it has the louvers.
• Step 2: Every time when the UNIT LOUVER button is pushed, the indoor unit No. under the group control is displayed in order. Specify the indoor unit No. to be replaced.
  1. Change the CODE No. (DN) from  to  by pushing / buttons for the temperature setting. (This is the setting for the filter sign lighting time.) At this time, be sure to write down the setting data displayed.
  2. Change the CODE No. (DN) by pushing / buttons for the temperature setting. Similarly, be sure to write down the setting data displayed.
  3. Repeat the step 2-2 to set the other settings in the same way and write down the setting data as shown in the table 1 (example).
     • The CODE No. (DN) are ranged from “ ” to “ ”. The CODE No. (DN) may skip.
• Step 3: After writing down all setting data, push TEST button to return to the normal stop status. (It takes approx. 1 min until the remote controller operation is available again.)

What CODE No. is required?

1. The CODE No. for the Indoor unit type and Indoor unit capacity are required to set the rotation number setting of the fan.
2. If the system/indoor/group addresses are different from those before replacement, the auto-address setting mode starts and the manual resetting may be required again. (When the multiple units group operation including twin system)

What are the P.C. Board for indoor unit servicing replacement procedures?

• Step 1: Replace the P.C. board for indoor unit servicing. At this time, perform the same setting of the jumper wire (J01) setting (cut), switch SW501 (short-circuit) connector CN34 as the setting of the P.C. board before replacement.
• Step 2: It is necessary to set indoor unit to be exchanged: Remote controller = 1 : 1. Based upon the system configuration, turn on power of the indoor unit with one of the following items.
  1. Single (Individual) operation. Turn on power of the indoor units and proceed to.
  2. Group operation
     • A) In case that power of the exchanged indoor unit only can be turned on: Turn on power of the exchanger indoor unit only and proceed to.
     • B) In case that power of the indoor units cannot be turned on individually (Case 1):
       • a) Remove temporarily the group wire connected to the terminal blocks A and B of the exchanged indoor unit.
       • b) After connecting the remote controller wire only to the removed terminal block, turn on power of the indoor units and proceed to.
         • When the above methods cannot be used, follow to the two cases below.
     • C) In case that power of the indoor units cannot be turned in individually (Case 2):
       • a) Remove all CN41 connectors of the indoor units in the same group except those of the exchanged indoor unit.
       • b) Turn on power of the indoor units and proceed to.
         • After operation has finished, be sure to return the temporarily removed group wire or CN41 connector to the original connection.

What are the wiring the setting data to EEPROM procedures?

The settings stored in the EEPROM of the P.C. board for indoor unit servicing are the factory-set values.

• Step 1: Push SET, CL and TEST buttons on the remote controller simultaneously for more than 4 seconds.
  • In the group control operation, the unit No. displayed for the first time is the header unit No. ( is displayed in the Unit No. box.) At this time, the CODE No. (DN) shows “ ”. Also, the fan of the indoor unit selected starts its operation and the swing operation starts if it has the louvers.
• Step 2: Every time when the UNIT LOUVER button is pushed, the indoor unit Nos. in the group control operation are displayed in order.
  • (The settings stored in the EEPROM of the P.C. board for indoor unit servicing are the factory-set values.) Specify the indoor unit No. with its P.C. board replaced to the P.C. board for indoor unit servicing.
• Step 3: Select the CODE No. (DN) can be selected by pushing the / button for the temperature setting.
  • Set the indoor unit type and capacity. The factory-set values shall be written to the EEPROM by changing the type and capacity.
  1. Set the CODE No. (DN) to “ ”. (without change)
  2. Select the type by pushing / buttons for the timer setting.
     • (For example, 4-way Air Discharge Cassette Type is set to “0001”.)
  3. Push SET button. (The operation completes if the setting data is displayed.)
  4. Change the CODE No. (DN) to “ ” by pushing / buttons for the temperature setting.
  5. Select the capacity by pushing / buttons for the timer setting.
     • (For example, 027 Type is set to “0012”.)
  6. Push SET button. (The setting completes if the setting data are displayed.)
     • Setting 4-way Air Discharge Cassette indoor unit model only
  7. Using the set temperature / buttons, set “
      ” to the CODE No. (DN).
  8. Using the timer time / buttons, set the dat. (0001)
  9. Push SET button (The setting completes if the setting data are displayed.)
     • CAUTION: Be sure to set the jumper wire since the motor protection level setting selection is preformed on it. If the plug short-circuit is attached on the P.C. board before replacement, attach it on the P.C. board replaced.
     • Set J02 as follows depending on the capacity class.
  10. Push the TEST button to return to the normal stop status (It takes approx. 1 min until the remote control operation is available again.)
• Step 4: Write the on-site setting data to the EEPROM such as address setting, etc. Perform the steps 1 and 2 above again.
• Step 5: Change the CODE No. (DN) to “ ” by pushing / buttons for the temperature setting. (This is the setting for the filter sign lighting time.)

How do you set J02?

AP009 to AP030 type	AP036 to AP056 type
Jumper wire (J02)	None
	Required (Factory setting)

How do you change the Indoor unit capacity?

Select the capacity by pushing / buttons for the timer setting. For example, 027 Type is set to “0012”.

How do you change the CODE No. to set the filter sign lighting time?

Change the CODE No. (DN) to “ ” by pushing / buttons for the temperature setting.

How do I change the setting data?

If the setting data is different, modify the setting data by pushing the / buttons for the timer setting to the data. If the data is the same, proceed to the next step.

How do I change the CODE No. (DN)?

Push the / buttons for the temperature setting. Check the setting data and modify the data.

What is the range for the CODE No. (DN)?

The CODE No. (DN) ranges from “ ” to “ ”.

Is the CODE No. (DN) limited to the serial No.?

No, the CODE No. (DN) is not limited to the serial No.

Can I return to the data before modification if I modified the data wrongly and pushed the SET button?

Yes, you can return to the data before modification by pushing the CL button if the CODE No. (DN) is not changed.

What is attached to the IC socket?

The EEPROM (IC503) is attached to the IC socket.

What should I use when detaching the EEPROM?

Use a tweezers to detach the EEPROM.

How do I attach the EEPROM?

Fit the direction of the EEPROM as shown in the figure when attaching it.

Should I bend the IC lead when replacing it?

Do not bend the IC lead when replacing.

What is the initial setup value of EEPROM installed on the service P.C. board?

0000

For the MMU-AP ✻✻✻✻✻✻ 2H models, what should the CODE No. and setting data 0000 (initial) be set to?

Set CODE No. to “
 ” and the setting data 0000 (initial) to “0001”.

What is Item code?

Indoor unit capacity

What is item code?

Type

What is the setup data for the filter sign lighting time?

0000: standard, 0099: Not determined

What is the setup data for the filter pollution level?

0002: +2°C (flooring installation type: 0)

What is the setup data for the central control address?

Depending on the type

What is the setup data for heating suction temperature shift?

0001: No auto mode * Automatically selection by cooling/heating

What is the setup data for the existence of automatic COOL/HEAT mode?

0000: Heat pump connected outdoor unit

What is the setup data for cooling only type?

Depending on model type

What is the setup data for indoor unit capacity?

Depending on capacity type

What is the setup data for the system address?

0099: Not determined

What is the setup data for the indoor unit address?

0099: Not determined

What is the setup data for the group address?

0099: Not determined

What is the setup data for the louver type (wind direction adjustment)?

Depending on Type. 0003: 3 deg (Ts ± 1.5)

What is the setup data for the temperature range of cooling/heating automatic SW control point?

0000: None

What is the setup data for power failure automatic recovery?

0002: Humidifier

What is the setup data for Option/Abnormal input (CN70)?

0000: Not available

What is the setup data for SW Ventilation fan (standalone)?

0000: Body sensor

What is the setup data for Sensor SW (Selection of static pressure)?

0000: Standard

What is the setup data for High ceiling SW?

0000: Available

What is the setup data for the timer setting (wired remote controller)?

0001: Standard

What is the setup data for the swing mode?

0000: Not fixed

What is the setup data for the louver fixing position (Flap No. 1)?

0000: Not fixed

What is the setup data for the louver fixing position (Flap No. 2)?

0000: Not fixed

What is the setup data for the louver fixing position (Flap No. 3)?

0000: Not fixed

What is the setup data for the louver fixing position (Flap No. 4)?

0000: Not fixed

What is the type for setup data 0000 and 0001?

1-way Air Discharge Cassette

What is the Model abb. name for setup data 0000 and 0001?

MMU-AP✻✻✻SH

What is the type for setup data 0002?

4-way Air Discharge Cassette

What is the Model abb. name for setup data 0002?

MMU-AP✻✻✻2H

What is the type for setup data 0003?

2-way Air Discharge Cassette

What is the Model abb. name for setup data 0003?

MMU-AP✻✻✻WH

What is the type for setup data 0004?

1-way Air Discharge Cassette (Compact type)

What is the Model abb. name for setup data 0004?

MMU-AP✻✻✻YH

What is the type for setup data 0005?

Concealed Duct Standard

What is the Model abb. name for setup data 0005?

MMD-AP✻✻✻BH

What is the type for setup data 0006?

Slim Duct

What is the Model abb. name for setup data 0006?

MMD-AP✻✻✻SPH

What is the type for setup data 0007?

Concealed Duct High Static Pressure

What is the Model abb. name for setup data 0007?

MMD-AP✻✻✻SH

What is the type for setup data 0008?

Under Ceiling

What is the Model abb. name for setup data 0008?

MMD-AP✻✻✻H

What is the type for setup data 0009?

High Wall

What is the Model abb. name for setup data 0009?

MMC-AP✻✻✻H

What is the type for setup data 0010?

—

What is the Model abb. name for setup data 0010?

MMK-AP✻✻✻H

What is the type for setup data 0011?

Floor Standing Cabinet

What is the Model abb. name for setup data 0011?

—

What is the type for setup data 0012?

Floor Standing Concealed

What is the Model abb. name for setup data 0012?

MML-AP✻✻✻H

What is the type for setup data 0013?

—

What is the Model abb. name for setup data 0013?

MML-AP✻✻✻BH

What is the type for setup data 0014?

Floor Standing (Below 6HP)

What is the Model abb. name for setup data 0014?

—

What is the type for setup data 0015?

Compact 4-way Air Discharge Cassette

What is the Model abb. name for setup data 0015?

MMF-AP✻✻✻ H

What is the Model for setup data 0000?

Invalid

What is the Model for setup data 0001?

007 type

What is the Model for setup data 0002 – 0004?

—

What is the Model for setup data 0005?

009 type

What is the Model for setup data 0006 – 0008?

—

What is the Model for setup data 0009?

012 type

What is the Model for setup data 0010 – 0012?

—

What is the Model for setup data 0013?

015 type

What is the Model for setup data 0014 – 0016?

—

What is the Model for setup data 0017?

018 type

What is the Model for setup data 0018 – 0020?

—

What is the Model for setup data 0021?

024 type

What is the Model for setup data 0022?

027 type

What is the Model for setup data 0023?

030 type

What is the Model for setup data 0024 – 0025?

—

What is the Model for setup data 0026?

036 type

What is the Model for setup data 0027 – 0033?

—

What is the Model for setup data 0034?

048 type

What is the Model for setup data 0035?

056 type

What is the Model for setup data 0036 – 0038?

—

What is the Model for setup data 0039?

072 type

What is the Model for setup data 0040 – 0042?

—

What is the Model for setup data 0043?

096 type

What is the Model for setup data 0044 – 0050?

—

What is Location No. 202?

Fan Ass’y, Turbo

What is Location No. 203?

Remote Controller

What is Location No. 204?

Remote Controller

What is Location No. 205?

Bell Mouth

What is Location No. 206?

Pan Ass’y, Drain

What is Location No. 207?

Pan Ass’y, Drain

What is Location No. 209?

Refrigeration Cycle Ass’y

What is Location No. 210?

Refrigeration Cycle Ass’y

What is Location No. 211?

Refrigeration Cycle Ass’y

What is Location No. 213?

Motor, PMV, EDM-MD12TF-3

What is Location No. 215?

Valve, PMV, EDM-B25YGTF-3

What is Location No. 216?

Valve, PMV, EDM-B40YGTF-3

What is Location No. 217?

Remote Controller, SX-A11JE2

What is Location No. 218?

Remote Controller, EX-W2JE2

What is Location No. 219?

Remote Controller, WH-H1JE2

What is Location No. 220?

Hose, Drain

What is Location No. 221?

Lid, Inside

What is Location No. 222?

Guard, Fan

What is Location No. 223?

Band, Hose

What is Location No. 224?

Clamp, Down

What is Location No. 225?

Clamp, Up

What is Location No. 226?

Clamp, Wire

What is Location No. 227?

Nut, Flare, 1/4, IN

What is Location No. 228?

Socket, 3/8, IN

What is Location No. 229?

Socket, 1/4, IN

What is Location No. 230?

Nut, Flare, 1/2, IN

What is Location No. 231?

Nut, Flare, 5/8, IN

What is Location No. 232?

Socket, 1/2, IN

What is Location No. 233?

Socket, 5/8, IN

What is Location No. 234?

Rubber, Cushion

What is Location No. 236?

Screw, Fix Panel

What is Location No. 240?

Motor, Fan

What is Location No. 241?

Cover Ass’y

What is Location No. 242?

Cap, Nut

What is Location No. 243?

Gasket

What is Location No. 244?

Pump Ass’y, MDP-1401

What is Location No. 245?

Switch Ass’y, Float, FS-0218-102

What is Location No. 246?

Lid Ass’y, Outside

What is Location No. 247?

Socket Ass’y, Drain

What is Location No. 248?

Washer

What is Location No. 249?

Nut

What is Location No. 250?

Holder, Sensor

What is Location No. 251?

Bonnet

What is Location No. 252?

Bonnet, 1/2, IN

What is Location No. 253?

Bonnet

What is Location No. 254?

Nut, Flare, 3/8, IN

What is Location No. 255?

Bonnet

What is Location No. 256?

Holder, Sensor

What is Location No. 257?

Band, Hose

What is Location No. 258?

Sheet, PMV

What is Location No. 259?

Cover, Glass

What is Location No. 260?

String

What is Location No. 261?

Owner’s Manual

What is Location No. 262?

Glass

What is Location No. 263?

Strainer

What is Location No. 264?

Strainer

What is Location No. 401 for model names MMU-AP 0092H, 0122H, 0152H, 0182H, and 0242H?

Sensor Ass’y, Service, TC (F6)

What is Location No. 402 for model names MMU-AP 0092H, 0122H, 0152H, 0182H, and 0242H?

Sensor, Service, TA

What is Location No. 403 for model names MMU-AP 0092H, 0122H, 0152H, 0182H, and 0242H?

Sensor Ass’y, Service, TG (F4)

What is Location No. 404 for model names MMU-AP 0092H, 0122H, 0152H, 0182H, and 0242H?

Terminal, 4P

What is Location No. 405 for model names MMU-AP 0092H, 0122H, 0152H, 0182H, and 0242H?

Terminal Block, 2P, 20A

What is Location No. 406 for model names MMU-AP 0092H, 0122H, 0152H, 0182H, and 0242H?

P.C. Board Ass’y, MCC-1570

What is Location No. 201 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Fan Ass’y, Turbo

What is Location No. 202 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Fan Ass’y, Turbo

What is Location No. 203 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Remote Controller, SX-A4EE

What is Location No. 204 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Remote Controller, SX-A5EE

What is Location No. 205 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Bell Mouth

What is Location No. 206 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Pan Ass’y, Drain

What is Location No. 208 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Pan Ass’y, Drain

What is Location No. 211 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Refrigeration Cycle Ass’y

What is Location No. 212 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Refrigeration Cycle Ass’y

What is Location No. 213 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Motor, PMV, EDM-MD12TF-3

What is Location No. 214 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Body, PMV

What is Location No. 216 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Valve, PMV, EDM-B40YGTF-3

What is Location No. 217 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Remote Controller, SX-A11JE2

What is Location No. 218 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Remote Controller, EX-W2JE2

What is Location No. 219 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Remote Controller, WH-H1JE2

What is Location No. 220 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Hose, Drain

What is Location No. 221 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Lid, Inside

What is Location No. 222 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Guard, Fan

What is Location No. 223 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Band, Hose

What is Location No. 224 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Clamp, Down

What is Location No. 225 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Clamp, Up

What is Location No. 226 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Clamp, Wire

What is Location No. 228 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Socket, 3/8, IN

What is Location No. 231 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Nut, Flare, 5/8, IN

What is Location No. 233 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Socket, 5/8, IN

What is Location No. 234 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Rubber, Cushion

What is Location No. 235 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Plate, Wind

What is Location No. 236 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Screw, Fix Panel

What is Location No. 237 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Rubber, Cushion

What is Location No. 238 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Washer

What is Location No. 239 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Motor, Fan

What is Location No. 240 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Motor, Fan

What is Location No. 241 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Cover Ass’y

What is Location No. 242 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Cap, Nut

What is Location No. 243 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Gasket

What is Location No. 244 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Pump Ass’y, MDP-1401

What is Location No. 245 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Switch Ass’y, Float, FS-0218-102

What is Location No. 246 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Lid Ass’y, Outside

What is Location No. 247 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Socket Ass’y, Drain

What is Location No. 248 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Washer

What is Location No. 249 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Nut

What is Location No. 250 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Holder, Sensor

What is Location No. 251 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Bonnet

What is Location No. 253 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Bonnet

What is Location No. 254 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Nut, Flare, 3/8, IN

What is Location No. 256 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Holder, Sensor

What is Location No. 257 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Band, Hose

What is Location No. 258 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Sheet, PMV

What is Location No. 259 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Cover, Glass

What is Location No. 260 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

String

What is Location No. 261 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Owner’s Manual

What is Location No. 262 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Glass

What is Location No. 263 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Strainer

What is Location No. 401 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Sensor Ass’y, Service, TC (F6)

What is Location No. 402 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Sensor, Service, TA

What is Location No. 403 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Sensor Ass’y, Service, TG (F4)

What is Location No. 404 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Terminal, 4P

What is Location No. 405 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

Terminal Block, 2P, 20A

What is Location No. 406 for model names MMU-AP 0272H, 0302H, 0362H, 0482H, and 0562H?

P.C. Board Ass’y, MCC-1570

What is Location No. 301 for model names RBC-U31, U31PG(W)-E, U31PG(WS)-E, U31PGS(W)-E, and U31PGS(WS)-E?

Grille, Air Inlet