TOSHIBA MMD-AP0566BHP-TR (01) PDF MANUAL

The air conditioner must be installed, maintained, repaired and removed by a qualified installer or qualified service person. A qualified installer or qualified service person is an agent who has the qualifications and knowledge described in the table below:

When the air conditioner is to be transported, installed, maintained, repaired or removed, wear protective gloves and ‘safety’ work clothing. In addition to such normal protective gear, wear the protective gear described below when undertaking the special work detailed in the table below. Failure to wear the proper protective gear is dangerous because you will be more susceptible to injury, burns, electric shocks and other injuries.

* Property damage: Enlarged damage concerned to property, furniture, and domestic animal / pet

Confirm that labels are indicated on the specified positions. If removing the label during parts replace, stick it as the original.

• Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit breaker for both the indoor and outdoor units to the OFF position. Otherwise, electric shocks may result.

• Before opening the electrical box cover of the indoor unit or service panel of the outdoor unit, set the circuit breaker to the OFF position. Failure to set the circuit breaker to the OFF position may result in electric shocks through contact with the interior parts. Only a qualified installer (*1) or qualified service person (*1) is allowed to remove the intake grille of the indoor unit or service panel of the outdoor unit and do the work required.

• Before opening the suction board cover, set the circuit breaker to the OFF position. Failure to set the circuit breaker to the OFF position may result in injury through contact with the rotation parts. Only a qualified installer (*1) or qualified service person (*1) is allowed to remove the suction board cover and do the work required.

• Before starting to repair the outdoor unit fan or fan guard, be absolutely sure to set the circuit breaker to the OFF position, and place a “Work in progress” sign on the circuit breaker.

• When cleaning the filter or other parts of the indoor unit, set the circuit breaker to OFF without fail, and place a “Work in progress” sign near the circuit breaker before proceeding with the work.

• When you have noticed that some kind of trouble (such as when an error display has appeared, there is a smell of burning, abnormal sounds are heard, the air conditioner fails to cool or heat or water is leaking) has occurred in the air conditioner, do not touch the air conditioner yourself but set the circuit breaker to the OFF position, and contact a qualified service person. Take steps to ensure that the power will not be turned on (by marking “out of service” near the circuit breaker, for instance) until qualified service person arrives. Continuing to use the air conditioner in the trouble status may cause mechanical problems to escalate or result in electric shocks or other failure.

• When you access inside of the service panel to repair electric parts, wait for about five minutes after turning off the breaker. Do not start repairing immediately. Otherwise you may get electric shock by touching terminals of high-voltage capacitors. Natural discharge of the capacitor takes about five minutes.

• When checking the electric parts, removing the cover of the electric parts box of Indoor Unit and/or service panel of Outdoor Unit inevitably to determine the failure, use gloves to provide protection for electricians, insulating shoes, clothing to provide protection from electric shock and insulating tools. Be careful not to touch the live part. Electric shock may result. Only “Qualified service person” is allowed to do this work.

• Place a “Work in progress” sign near the circuit breaker while the installation, maintenance, repair or removal work is being carried out. There is a danger of electric shocks if the circuit breaker is set to ON by mistake.

• When checking the electric parts, removing the cover of the electric parts box of Indoor Unit and/or front panel of Outdoor Unit inevitably to determine the failure, put a sign “Do not enter” around the site before the work. Failure to do this may result in third person getting electric shock.

• Before operating the air conditioner after having completed the work, check that the electrical parts box cover of the indoor unit and service panel of the outdoor unit are closed, and set the circuit breaker to the ON position. You may receive an electric shock if the power is turned on without first conducting these checks.

• If, in the course of carrying out repairs, it becomes absolutely necessary to check out the electrical parts with the electrical parts box cover of one or more of the indoor units and the service panel of the outdoor unit removed in order to find out exactly where the trouble lies, wear insulated heat-resistant gloves, insulated boots and insulated work overalls, and take care to avoid touching any live parts. You may receive an electric shock if you fail to heed this warning. Only qualified service person (*1) is allowed to do this kind of work.

(*1) Refer to the “Definition of Qualified Installer or Qualified Service Person”

• Before starting to repair the air conditioner, read carefully through the Service Manual, and repair the air conditioner by following its instructions.

• Only qualified service person (*1) is allowed to repair the air conditioner. Repair of the air conditioner by unqualified person may give rise to a fire, electric shocks, injury, water leaks and / or other problems.

• Do not use any refrigerant different from the one specified for complement or replacement. Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or explosion of the product or an injury to your body.

• Only a qualified installer (*1) or qualified service person (*1) is allowed to carry out the electrical work of the air conditioner. Under no circumstances must this work be done by an unqualified individual since failure to carry out the work properly may result in electric shocks and / or electrical leaks.

• When the air conditioner is to be transported, installed, maintained, repaired or removed, wear protective gloves and ‘safety’ work clothing.

• To connect the electrical wires, repair the electrical parts or undertake other electrical jobs, wear gloves to provide protection for electricians, insulating shoes and clothing to provide protection from electric shocks. Failure to wear this protective gear may result in electric shocks.

• Electrical wiring work shall be conducted according to law and regulation in the community and installation manual. Failure to do so may result in electrocution or short circuit.

• Use wiring that meets the specifications in the Installation Manual and the stipulations in the local regulations and laws. Use of wiring which does not meet the specifications may give rise to electric shocks, electrical leakage, smoking and/or a fire.

• Only a qualified installer (*1) or qualified service person (*1) is allowed to undertake work at heights using a stand of 50 cm or more or to remove the intake grille of the indoor unit to undertake work.

• When working at heights, use a ladder which complies with the ISO 14122 standard, and follow the procedure in the ladder’s instructions. Also wear a helmet for use in industry as protective gear to undertake the work.

• Before working at heights, put a sign in place so that no-one will approach the work location, before proceeding with the work. Parts and other objects may fall from above, possibly injuring a person below. While carrying out the work, wear a helmet for protection from falling objects.

• When executing address setting, test run, or troubleshooting through the checking window on the electric parts box, put on insulated gloves to provide protection from electric shock. Otherwise you may receive an electric shock.

• When the first filter comes out without connected to the other one, insert it once more to connect the two filters together and pull out them as connected. Do not insert hands to take out the second filter. You may injure Yourself.

• Do not touch the aluminum fin of the outdoor unit. You may injure yourself if you do so. If the fin must be touched for some reason, first put on protective gloves and safety work clothing, and then proceed.

• Do not climb onto or place objects on top of the outdoor unit. You may fall or the objects may fall off of the outdoor unit and result in injury.

• Use forklift to carry in the air conditioner units and use winch or hoist at installation of them.

• When transporting the air conditioner, wear shoes with protective toe caps, protective gloves and other protective clothing.

• When transporting the air conditioner, do not take hold of the bands around the packing carton. You may injure yourself if the bands should break.

• Be sure that a heavy unit (10 kg or heavier) such as a compressor is carried by two persons.

• This air conditioner has passed the pressure test as specified in IEC 60335-2-40 Annex EE.

(*1) Refer to the “Definition of Qualified Installer or Qualified Service Person”

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

• After completing the repair or relocation work, check that the ground wires are connected properly.

• Be sure to connect earth wire. (Grounding work) Incomplete grounding causes an electric shock. Do not connect ground wires to gas pipes, water pipes, and lightning rods or ground wires for telephone wires.

• 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: When any of the electrical parts are to be replaced, ensure that the replacement parts satisfy the specifications given in the Service Manual (or use the parts contained on the parts list in the Service Manual). Use of any parts which do not satisfy the required specifications may give rise to electric shocks, smoking and / or a fire.

• Do not bring a child close to the equipment: If, in the course of carrying out repairs, it becomes absolutely necessary to check out the electrical parts with the electrical parts box cover of one or more of the indoor units and the service panel of the outdoor unit removed in order to find out exactly where the trouble lies, put a sign in place so that no-one will approach the work location before proceeding with the work. Third-party individuals may enter the work site and receive electric shocks if this warning is not heeded.

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

No fire:

• When performing repairs using a gas burner, replace the refrigerant with nitrogen gas because the oil that coats the pipes may otherwise burn.

• When repairing the refrigerating cycle, take the following measures:

1) 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.

2) Do not use a welder in the closed room. When using it without ventilation, carbon monoxide poisoning may be caused.

3) Do not bring inflammables close to the refrigerant cycle, otherwise fire of the welder may catch the inflammables.

Refrigerant:

• The refrigerant used by this air conditioner is the R410A.

• 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.

• Do not use any refrigerant different from the one specified for complement or replacement. Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or explosion of the product or an injury to your body.

• For an air conditioner which uses R410A, never use other refrigerant 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.

• When the air conditioner has been installed or relocated, follow the instructions in the Installation Manual and purge the air completely so that no gases other than the refrigerant will be mixed in the refrigerating cycle. Failure to purge the air completely may cause the air conditioner to malfunction.

• Do not charge refrigerant additionally. If charging refrigerant additionally when refrigerant gas leaks, the refrigerant composition in the refrigerating cycle changes resulted in 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 resulted in 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 resulted in 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 to fire such as fan heater, stove or cocking 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 recovering device. The refrigerant cannot be recovered in the outdoor unit; otherwise a serious accident such as breakage or injury is caused.

Assembly / Wiring:

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

Insulator check:

• After the work has finished, be sure to use an insulation tester set (500 V Megger) to check the resistance is 1 MΩ 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 user’s side.

Ventilation:

• When the refrigerant gas leaks during work, execute ventilation. If the refrigerant gas touches to a 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.

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

• After installation work, check the refrigerant gas does not leak. If the refrigerant gas leaks in the room, poisonous gas generates when gas touches to fire such as fan heater, stove or cocking stove though the refrigerant gas itself is innocuous.

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 to fire such as fan heater, stove or cocking stove though the refrigerant gas itself is innocuous.

• When installing equipment which 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 the limit even if the refrigerant leaks. If the refrigerant leaks and exceeds the limit density, an accident of shortage of oxygen is caused.

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

• Nitrogen gas must be used for the airtight test.

• The charge hose must be connected in such a way that it is not slack.

Check after repair:

• For the installation / moving / reinstallation work, follow to the Installation Manual. If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric shock or fire is caused.

• Once the repair work has been completed, check for refrigerant leaks, and check the insulation resistance and water drainage. Then perform a trial run to check that the air conditioner is running properly.

• After repair work has finished, check there is no trouble. If 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 front panel and cabinet) has finished, execute a test run to check there is no generation of smoke or abnormal sound. If check is not executed, a fire or an electric shock is caused. Before test run, install the front panel and cabinet.

• Be sure to fix the screws back which have been removed for installation or other purposes.

Do not operate the unit with the valve closed:

• Check the following matters before a test run after repairing piping:

– Connect the pipes surely and there is no leak of refrigerant.

– The valve is opened.

Running the compressor under condition that the valve closes causes an abnormal high pressure resulted in damage of the parts of the compressor and etc. and moreover if there is leak of refrigerant at connecting section of pipes, the air is sucked and causes further abnormal high pressure resulted in burst or injury.

Check after reinstallation:

• Only a qualified installer (*1) or qualified service person (*1) is allowed to relocate the air conditioner. It is dangerous for the air conditioner to be relocated by an unqualified individual since a fire, electric shocks, injury, water leakage, noise and / or vibration may result.

• Check the following items after reinstallation:

1) The earth wire is correctly connected.

2) The power cord is not caught in the product.

3) There is no inclination or unsteadiness and the installation is stable.

If check is not executed, a fire, an electric shock or an injury is caused.

• When carrying out the pump-down work shut down the compressor before disconnecting the refrigerant pipe. Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will cause air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly resulting in reputing, injury, etc.

(*1) Refer to the “Definition of Qualified Installer or Qualified Service Person”

Cooling check:

• When the service panel of the outdoor unit is to be opened in order for the compressor or the area around this part to be repaired immediately after the air conditioner has been shut down, set the circuit breaker to the OFF position, and then wait at least 10 minutes before opening the service panel. If you fail to heed this warning, you will run the risk of burning yourself because the compressor pipes and other parts will be very hot to the touch. In addition, before proceeding with the repair work, wear the kind of insulated heat-resistant gloves designed to protect electricians.

• Take care not to get burned by compressor pipes or other parts when checking the cooling cycle while running the unit as they get heated while running. Be sure to put on gloves providing protection for heat.

• When the service panel of the outdoor unit is to be opened in order for the fan motor, reactor, inverter or the areas around these parts to be repaired immediately after the air conditioner has been shut down, set the circuit breaker to the OFF position, and then wait at least 10 minutes before opening the service panel. If you fail to heed this warning, you will run the risk of burning yourself because the fan motor, reactor, inverter heat sink and other parts will be very hot to the touch. In addition, before proceeding with the repair work, wear the kind of insulated heat-resistant gloves designed to protect electricians.

Installation:

• Only a qualified installer or service person is allowed to do installation work. Inappropriate installation may result in water leakage, electric shock or fire.

• Before starting to install the air conditioner, read carefully through the Installation Manual, and follow its instructions to install the air conditioner.

• Be sure to use the company-specified products for the separately purchased parts. Use of non-specified products may result in fire, electric shock, water leakage or other failure. Have the installation performed by a qualified installer.

• Do not supply power from the power terminal block equipped on the outdoor unit to another outdoor unit. Capacity overflow may occur on the terminal block and may result in fire.

• Do not install the air conditioner in a location that may be subject to a risk of expire to a combustible gas. If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.

• Install the indoor unit at least 2.5 m above the floor level since otherwise the users may injure themselves or receive electric shocks if they poke their fingers or other objects into the indoor unit while the air conditioner is running.

• Install a circuit breaker that meets the specifications in the installation manual and the stipulations in the local regulations and laws.

• Install the circuit breaker where it can be easily accessed by the qualified service person (*1).

• If you install the unit in a small room, take appropriate measures to prevent the refrigerant from exceeding the limit concentration even if it leaks. Consult the dealer from whom you purchased the air conditioner when you implement the measures. Accumulation of highly concentrated refrigerant may cause an oxygen deficiency accident.

• Do not place any combustion appliance in a place where it is directly exposed to the wind of air conditioner, otherwise it may cause imperfect combustion.

• When mounting the rails, push them until the 3 latches click. (Concealed duct type only)

• Insert the filters into the direction which the arrows, carved on the filters, show. (2 filters are identical)

(*1) Refer to the “Definition of Qualified Installer or Qualified Service Person”

Explanations given to user:

• If you have discovered that the fan grille is damaged, do not approach the outdoor unit but set the circuit breaker to the OFF position, and contact a qualified service person to have the repairs done.

• Do not set the circuit breaker to the ON position until the repairs are completed.

Relocation:

• Only a qualified installer (*1) or qualified service person (*1) is allowed to relocate the air conditioner. It is dangerous for the air conditioner to be relocated by an unqualified individual since a fire, electric shocks, injury, water leakage, noise and / or vibration may result.

• When carrying out the pump-down work shut down the compressor before disconnecting the refrigerant pipe. Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will cause air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly resulting in reputing, injury, etc.

(*1) Refer to the “Definition of Qualified Installer or Qualified Service Person”

*: Under 70 dBA

Model name: MMD-AP****BHP-E(TR) (50Hz)

Note 1: The cooling capacities and electrical characteristics are measured under the conditions specified by JIS B 8615 based on the reference piping. The reference piping consists of 5 m of main piping and 2.5 m of branch piping connected with 0 m height.

Note 2: The sound level are measured in an anechoic chamber in accordance with JIS B 8616. Normally, the values measured in the actual operating environment become larger than the indicated values due to the effects of external sound.

Note: Rated conditions Cooling: Indoor air temperature 27°C DB/19°C WB, Outdoor air temperature 35°C DB. Heating: Indoor air temperature 20°C DB, Outdoor air temperature 7°C DB/6°C WB.

Model name: MMD-AP****BHP-E(TR) (60Hz)

Note 1: The cooling capacities and electrical characteristics are measured under the conditions specified by JIS B 8615 based on the reference piping. The reference piping consists of 5 m of main piping and 2.5 m of branch piping connected with 0 m height.

Note 2: The sound level are measured in an anechoic chamber in accordance with JIS B 8616. Normally, the values measured in the actual operating environment become larger than the indicated values due to the effects of external sound.

Note: Rated conditions Cooling: Indoor air temperature 27°C DB/19°C WB, Outdoor air temperature 35°C DB. Heating: Indoor air temperature 20°C DB, Outdoor air temperature 7°C DB/6°C WB.

Refer to the air ducting work graphs for relationships between external static pressure and air volume for specific tap settings.

Other dimensions are detailed in the construction view diagrams.

Color Indication:

RED: RED, WHI: WHITE, YEL: YELLOW, BLU: BLUE, BLK: BLACK, GRN: GREEN, BRW: BROWN

Line Indications in Diagram:

1. Broken line indicate the wiring at site. Long dashed short dashed line indicate the accessories.

2. Square symbol indicates the terminal block.

3. Circle symbol indicates the connection terminal. Arrow symbol indicates the connector on the control P.C. board.

4. Rectangle with text indicates the control P.C. board.

6. Earth symbol indicates the protection ground.

1. Identification of outdoor unit: When the power supply is reset, the outdoor unit is identified, and control is redirected according to the identification result.

2. Indoor fan speed and air flow direction control availability settings: Settings such as indoor fan speed and air flow direction control availability are replaced on the basis of EEPROM data.

3. If power supply reset is performed in the wake of a fault, the check code is cleared. If the abnormality persists after the Start / Stop button on the remote controller is pressed to resume operation, the check code is redisplayed on the remote controller.

The operation mode changes in response to an operation selection command issued via the remote controller.

Ts: Temperature setting

Ta: Room temperature

1. Adjustment range – remote controller temperature setting (°C):

2. In heating operation, the temperature setting may be fine-tuned via the DN code “06”.

Shift in heating suction temperature (not applicable to remote controller thermo operation).

Factory default for temperature setting adjustment:

The outdoor unit determines the operational capacities of indoor units according to the difference between Ta (Room temperature) and Ts (Temperature setting).

The specific capacity steps (SD, SO, S3, SB, S5, S9, S7, SF) are determined by the Ta-Ts difference in both Cooling and Heating modes, as per the control logic graphs.

Ta: Room temperature

Ts: Temperature setting

1. The fan operates in one of the four speed modes of “HIGH (HH)”, “MED (H)”, “LOW (L)” and “AUTO” on the basis of a command issued via the remote controller. (Concealed duct high static pressure type: HH only). Fan speed hierarchy: HH > H+ > H > L+ > L > UL or LL.

2. In AUTO fan speed mode, the air speed changes according to the difference between Ta (Room temperature) and Ts (Temperature setting).

<Cooling>

The fan speed (HH, H+, H, L+, L) is adjusted based on specific Ta-Ts thresholds (e.g., +3.0, +2.5, +2.0, +1.5, +1.0, +0.5, Tsc, -0.5 °C).

• Control is identical in remote controller thermo and body thermo operation (DN code “32”: “0000” for Body thermo, “0001” for Remote controller thermo).

• Speed modes shown in < > apply to cooling operation under AUTO air conditioner operation mode.

• In AUTO fan speed mode, the fan speed remains the same for 3 minutes each time a speed change occurs. However, a speed change command issued via the remote controller can override this, and the fan speed changes accordingly.

• At the beginning of cooling operation, a higher speed (steeper downward temperature gradient) is chosen.

• As long as the temperature difference remains on a boundary line, the fan speed stays the same.

<Heating>

The fan speed (L, L+, H, H+, HH) is adjusted based on specific Ta-Ts thresholds (e.g., (-0.5)-1.0, (0) Tsh, (+0.5)+1.0, (+1.0)+2.0, (+1.5)+3.0, (+2.0)+4.0 °C). Figures in () apply to remote controller thermo operation.

• Speed modes shown in < > apply to heating operation under AUTO air conditioner operation mode.

• In AUTO fan speed mode, the fan speed remains the same for 1 minute each time a speed change occurs. However, a speed change command issued via the remote controller can override this, and the fan speed changes accordingly.

• At the beginning of heating operation, a higher speed (steeper upward temperature gradient) is chosen.

• As long as the temperature difference remains on a boundary line, the fan speed stays the same.

• When TC2 (Indoor heat exchanger sensor temperature) ≥ 60 °C, the fan speed is raised by one step.

3. If the air conditioner goes thermo OFF during heating operation, the fan speed drops down to LL (breeze). “HEATING STANDBY” may be displayed.

1. In heating operation, the upper limit of the fan tap is set according to the lower of whichever is the higher between TC2 sensor and TCJ sensor temperatures, on the one hand, and TC1 sensor temperature, on the other.

• If the fan continuously operates in zone B (e.g., 26°C to <28°C, breeze) for 6 minutes, it automatically moves into zone C (e.g., 28°C to <30°C, Low).

• During defrosting, the control point is shifted by +6 °C.

The control zones are defined as follows (TCJ: Indoor heat exchanger sensor temperature):

A zone: OFF (Below 26°C). “HEATING STANDBY” is displayed.

B zone: 26°C or above and below 28°C – breeze

C zone: 28°C or above and below 30°C – Low

D zone: 30°C or above and below 32°C – Medium

E zone: High (32°C or above)

• In zones D and E, priority is given to the remote controller fan speed setting.

TC1: Indoor heat exchanger sensor temperature. With models without TC2, TC2 is not part of the control parameters.

1. During cooling, the air conditioner is operated based on TC1, TC2, and TCJ sensor readings:

• If zone J operation (e.g., TC1 < 0°C or TC2/TCJ < -14°C) is detected for 5 minutes, the air conditioner is forced into thermo OFF.

• In zone K (e.g., 0°C ≤ TC1 < 10°C (or 5°C) or -14°C ≤ TC2/TCJ < -10°C), the timer is put on pause, with the current timer count retained.

• If zone I operation (e.g., TC1 ≥ 10°C (or 5°C) or TC2/TCJ ≥ -10°C) is detected, the timer count is cleared, and the air conditioner returns to normal operation.

• If continuous zone J operation forces thermo OFF, the indoor fan operates in breeze mode until it moves into zone I.

Termination conditions for this control:

1) TC1 ≥ 12 °C, TC2 ≥ 12 °C, and TCJ ≥ 12 °C

2) Passage of 20 minutes after stoppage

2. During cooling, based on TC2 and TCJ sensor readings:

• If zone M operation (e.g., TC2/TCJ < -2.0°C) is detected for 45 minutes, the air conditioner is forced into thermo OFF.

• In zone N (e.g., -2.0°C ≤ TC2/TCJ < 5°C), the timer is put on pause, with the current timer count retained.

• When the air conditioner goes back into zone M, timer count is resumed from the retained value.

• If zone L operation (e.g., TC2/TCJ ≥ 5°C) is detected, the timer count is cleared, and the air conditioner returns to normal operation.

Reset conditions for this control:

1) TC1 ≥ 12 °C, TC2 ≥ 12 °C and TCJ ≥ 12 °C

2) Passage of 20 minutes after stoppage

While the outdoor unit is recovering cooling oil (refrigerant), the indoor units perform the following control tasks (common for operational and nonoperational indoor units):

1. Open the indoor PMV to a certain degree.

2. Engage in recovery control for a specified period of time and return to normal cooling operation at the end of this period upon terminating the control.

3. Operate the drain pump throughout the recovery control period and for about 1 minute after it.

• Recovery operation normally takes place roughly every 2 hours.

• The opening position of the indoor PMV depends on the type and capacity of the indoor unit.

While the outdoor unit is recovering heating refrigerant (oil), the indoor units perform the following control tasks:

1. Open the indoor PMV to a certain degree.

2. Control the indoor fan according to the operation mode.

[Indoor units operating in heating thermo ON / OFF state]: Let the indoor fan continue operating, but turn it off if the temperature of the indoor heat exchanger drops.

[Indoor units operating in FAN mode]: Turn off the indoor fan and display “HEATING STANDBY” on the remote controller.

[Non-operational indoor units]: Keep the indoor fan turned off.

3. Terminate the recovery operation depending on the TC2 temperature reading. The timing of termination is determined by each indoor unit.

4. Operate the indoor fan and drain pump for about 1 minute after the termination of the recovery operation. (Applicable to compact 4-way cassette type and 1-way cassette type).

• Recovery operation normally takes place roughly every hour.

• The opening position of the indoor PMV depends on the type and capacity of the indoor unit.

While the outdoor unit is engaged in defrosting control, the indoor units perform the following control tasks:

1. Open the indoor PMV to a certain degree.

2. Control the indoor fan according to the operation mode.

[Indoor units operating in heating thermo ON / OFF state]: Let the indoor fan continue operating for a while, but turn it off as the temperature of the indoor heat exchanger drops.

[Indoor units operating in FAN mode]: Let the indoor fan continue operating.

[Non-operational indoor units]: Keep the indoor fan turned off.

3. As defrosting control comes to an end, it gives way to heating refrigerant (oil) recovery control. (For control details, see “9. Heating refrigerant (oil) recovery control” above.)

• For defrosting commencement conditions, refer to relevant outdoor unit service manual.

• The opening position of the indoor PMV depends on the type and capacity of the indoor unit.

1. For 5 minutes after startup, the system is forced to continue operating even if it reaches the thermo OFF region.

2. However, priority is given to cooling / heating selection, operation standby, and protective control, so that there is no overriding of thermo OFF in these cases.

1. During cooling (including DRY operation), the drain pump is operated at all times.

2. If the float switch is activated while the drain pump is in operation, the drain pump continues operating, with the relevant check code [P10] displayed.

3. If the float switch is activated while the drain pump is turned off, thermo OFF is forced on the air conditioner, with the drain pump put into operation. If the float switch continues to be activated for about 5 minutes, the drain pump is turned off, with the relevant check code displayed.

When the air conditioner is turned off after engaging in heating operation, the indoor fan is operated for about 30 seconds in “breeze” mode.

(Not applicable to wireless type. Provided in the separately mounted type, TCB-AX21E.)

1. The indoor fan’s cumulative hours of operation are counted, and when these exceed the prescribed value (default 2500H, can be set from 150H to 10000H via DN code 01), a filter replacement signal is sent to the remote controller to display “FILTER” on it.

2. When a filter reset signal is received from the remote controller, the timer measuring cumulative hours is cleared. If the prescribed hours have been exceeded, the hours count is reset, with the sign on the remote controller display erased.

Filter service life (default): 2500H

<Operation standby> ….. Displayed on remote controller (“OPERATION STANDBY” displayed. No display provided on wireless remote controller)

1. When any of the DN codes listed below is displayed:

• “P05” – Detection of an open phase in the power supply wiring

• “P10” – Detection of indoor flooding in at least one indoor unit

• “L30” – Detection of an interlock alarm in at least one indoor unit

2. Forced thermo OFF:

• “COOL / DRY” operation is unavailable because at least one indoor unit is operating in “HEAT” mode.

• “HEAT” operation is unavailable because at least one indoor unit is operating in “COOL / DRY” mode under priority cooling setting (bit 1 of SW11 on outdoor I/F P.C. board ON).

3. All indoor units not able to engage in any of the above operations stand by in thermo OFF state.

4. The indoor fan has been turned off because the system is engaged in a heat refrigerant (oil) recovery operation.

<Heating standby> ….. Displayed on remote controller (“HEATING STANDBY” displayed)

1. Normal thermo OFF:

• During heating, the indoor unit goes thermo OFF as the heating temperature setting is reached.

2. During heating, the fan rotates at a breeze speed (UL or lower) or remains stationary to prevent cold air from being discharged (including defrosting operation).

3. Forced thermo OFF:

• “HEAT” operation is unavailable because at least one indoor unit is operating in “COOL / DRY” mode under priority cooling setting (bit 1 of SW11 on outdoor I/ F P.C. board ON).

1. The range of operations that can be performed via an indoor unit remote controller can be determined through the setting of the central controller.

2. Setting details for TCC-Link central control and operation on RBC-AMT32E:

(O: Accessible X: Inaccessible)

• In the case of a wired remote controller, “CENTRAL CONTROL IN PROGRESS” is displayed (lit up) while in central control mode.

• The display blinks when a control function inaccessible to a remote controller is chosen.

• A wireless remote controller has the same set of control functions, although there is no display. When a control operation is performed via a wireless remote controller while in central control mode, a peep sound alert (5 times) is provided.

1. When the fan operation has started, positioning of the stator and the rotor are performed. (Moves slightly with tap sound). Check code “P12” may be displayed.

2. The motor operates according to the command from the indoor controller.

Notes:

• When the fan rotates while the air conditioner stops due to entering of outside air, etc, the air conditioner may operate while the fan motor stops.

• When a fan lock is found, the air conditioner stops, and an error is displayed.

• If static pressure of the used duct does not match with the setup value of static pressure, which was decided in the static pressure setting code No. [5D], the air conditioner may stop or an error code may be displayed.

The power saving operation cannot be set by the wireless remote controller or wired remote controller of AMT31E or older.

1. Push the SAVE button on the remote controller.

2. The “SAVE” segment lights up on the wired remote controller display.

3. The requirement capacity ratio is limited to approximately 75%.

4. If the power saving operation is enabled, the settings are retained when the operation is stopped, when the mode is changed, or when the power is reset. The power saving operation will be enabled the next time the operation starts.

Command frequency is approximately [S7].

<In case of wired remote controller>

1. When pushing [CHK] button for 4 seconds or more, [TEST] is displayed on the display screen and the mode enters in Test run mode.

2. Push [ON/OFF] button.

3. Using [MODE] button, set the mode to [COOL] or [HEAT].

• Do not use other mode than [COOL]/[HEAT] mode.

• During test run operation, the temperature cannot be adjusted.

• An error is detected as usual.

• A frequency fixed operation is performed.

4. After the test run, push [ON/OFF] button to stop the operation. (Display in the display part is same as the procedure in Item 1.)

5. Push [CHK] button to clear the test run mode. ([TEST] display in the display part disappears and the status returns to the normal stop status.)

<In case of wireless remote controller>

1. When TEMPORARY button is pushed for 10 seconds or more, “Pi!” sound is heard and the operation changes to test run. After approx. 3 minutes, a cooling operation starts forcedly. Check cool air starts blowing. If the operation does not start, check wiring again.

2. To stop a test operation, push TEMPORARY button once again (Approx. 1 second). Check wiring / piping of the indoor and outdoor units in test run.

This function checks the indoor unit’s operation singly without communication with the remote controller or outdoor unit. Use this function for a limited time (several minutes) to avoid equipment trouble.

[How to operate]

1. Short-circuit CHK pin (CN71 on the indoor P.C. board). The operation mode differs according to the indoor unit status at 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 (30 pls) can be set to the indoor PMV only. When DISP pin is open, the maximum opening degree (1500 pls) can be obtained.

[How to clear]

Open CHK pin. While the system is operating, it stops once but automatically returns to operation after several minutes.

• To exchange the indoor PMV coil, set the indoor PMV to Max. opening degree.

• For the detailed positions of CHK pin (CN71) and DISP pin (CN72), refer to the indoor P.C. board diagram.

This procedure should be performed only when the system is at rest.

1. Push the TEST + SET + CL buttons simultaneously and hold for at least 4 seconds. The unit No. displayed first is the address of the header indoor unit in group control. Then the fan and louver of the selected indoor unit move.

2. Each time the UNIT LOUVER button (left side of the button, typically an arrow pointing left or up for unit selection) is pressed, one of the indoor unit Nos. under group control is displayed in turn. Then the fan and louver of the selected indoor unit move.

3. Use the TEMP. buttons (typically up/down arrows for temperature) to select the CODE No. (DN code) of the desired function.

4. Use the TIME buttons (typically up/down arrows for timer/data setting) to select the desired SET DATA associated with the selected function.

5. Push the SET button. (The display changes from flashing to steady.)

• To change the selected indoor unit, go back to step 2.

• To change the selected function, go back to step 3.

6. When the TEST button is pushed, the system returns to normal off state.

(The button labels mentioned like UNIT LOUVER, TEMP, TIME, SET, TEST refer to standard wired remote controller buttons.)

Type DN code “10”

Indoor Unit Capacity DN code “11” (*1 Default value stored in EEPROM mounted on service P.C. board)

Wiring and setting:

• In the case of group control, the control system functions as long as it is connected to one of the indoor units (control P.C. board) in the group. If it is desired to access the operation and error statuses of other units, relevant signals must be brought to it from those units individually.

Control items:

(1) Start / Stop input signal: Start / stop of unit

(2) In-operation signal Output: Output present while unit in normal operation

(3) Error signal Output: present while alarm (e.g. serial communication error or operation of protective device for indoor / outdoor unit) being activated

Wiring diagram of control system using remote controller interface (TCB-IFCB4E2):

Input (to TCB-IFCB4E2): No-voltage ON / OFF serial signal

Output (from TCB-IFCB4E2): No-voltage contact (in-operation and error indication). Contact capacity: Max. AC 240 V, 0.5 A

Connections between Indoor control P.C. board (e.g., CN61 T10 Yellow) and TCB-IFCB4E2 (e.g., CN06, CN13):

• Start/Stop input (Indoor P.C. board Pin 1) to ON side Start signal input (TCB-IFCB4E2)

• COM (GND) (Indoor P.C. board Pin 2) to COM (TCB-IFCB4E2)

• Remote controller disabling / ending input (Indoor P.C. board Pin 3) to OFF side Stop signal input (TCB-IFCB4E2)

• In-operation signal output (Indoor P.C. board Pin 4) from In-operation signal output (TCB-IFCB4E2)

• COM (+12V) (Indoor P.C. board Pin 5) connected appropriately for TCB-IFCB4E2 power if needed or used as common.

• Error signal output (Indoor P.C. board Pin 6) from Error signal output (TCB-IFCB4E2)

The TCB-IFCB4E2 requires a power supply of 220-240V.

[Function]

• The start / stop operation can be operated from the wired remote controller when an 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 cannot be individually operated.

1. Operation

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 TEST + SET + CL 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 of the UNIT LOUVER button (left side of the 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 (UP/DOWN) buttons, specify the CODE No. 31.

4. Using the timer time (UP/DOWN) buttons, select the SET DATA. (At shipment: 0000)

SET DATA 0000: Unavailable (At shipment)

SET DATA 0001: Available

5. Push SET button. (OK if display goes on.)

• To change the selected indoor unit, go to procedure 2).

• To change the item to be set up, go to procedure 3).

6. Pushing TEST button returns the status to the usual stop status.

2. Wiring

Connect a relay (DC12V, procured locally) to the FAN DRIVE output (CN32, 2P WHI) on the indoor control P.C. board. The relay contacts then provide the outside control input to the fan.

• The relay should correspond to the rated current of the operation coil (approx. 75mA for specific models like Compact 4-way Cassette, 1-way Cassette (SH), Concealed Duct Standard, Slim Duct, Ceiling type; approx. 16mA for other types).

• Determine the cable length between the indoor control P.C. board and the relay to be within 2m.

[Function]

• 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 CODE No. 2E is set to the connected indoor unit.

• It is used when the start operation from outside is 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.

1. 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)

* When the card switch box does not perform the above contact operation, convert it using a relay with b contact.

2. Operation

Handle the wired remote controller switch in the following procedure.

* Use the wired remote controller switch during stop of the system.

1. Push concurrently TEST + SET + CL buttons for 4 seconds or more.

2. Using the setup temp (UP/DOWN) buttons, specify the CODE No. 2E.

3. Using the timer time (UP/DOWN) buttons, set 0001 to the SET DATA.

4. Push SET button.

5. Push TEST button. (The status returns to the usual stop status.)

3. Wiring

Connect a relay (procured locally) to the HA terminal (CN61, T10 YEL, typically pins 1 and 5 for start/stop input and +12V COM) on the indoor control P.C. board. The outside contact (card switch box) operates this relay.

• In the figure, the contact indicates a status that the card is taken out.

• Determine the cable length between the indoor control P.C. board and the relay within 2m.

When the relay (connected to EXCT demand input CN73 on the indoor P.C. board) is turned on, a forced thermostat-OFF operation starts.

Wiring example:

Connect a relay (procured locally) to the EXCT connector (CN73, 2P plug: RED) on the indoor control P.C. board. The relay coil signal will activate the peak-cut.

Note) Determine the cable length between the indoor or outdoor control P.C. board and the relay within 2m.

This procedure is for setting indoor units’ addresses first, under the condition that indoor wiring has been completed and outdoor wiring has not been started (manual setting using the remote controller).

First, disconnect the remote controller connections between indoor units and connect a wired remote controller to the target unit directly (one-to-one).

Turn on the power.

1. Push and hold the SET, CL, and TEST buttons at the same time for more than 4 seconds. LCD starts flashing.

<Line (system) address>

2. Push the TEMP. (UP/DOWN) buttons repeatedly to set the CODE No. to 12.

3. Push the TIME (UP/DOWN) buttons repeatedly to set a system address. (Match the address with the address on the interface P.C. board of the header outdoor unit in the same refrigerant line.)

4. Push SET button. (It is OK if the display turns on.)

<Indoor unit address>

5. Push the TEMP. (UP/DOWN) buttons repeatedly to set the CODE No. to 13.

6. Push the TIME (UP/DOWN) buttons repeatedly to set an indoor unit address.

7. Push SET button. (It is OK if the display turns on.)

<Group address>

8. Push the TEMP. (UP/DOWN) buttons repeatedly to set the CODE No. to 14.

9. Push the TIME (UP/DOWN) buttons repeatedly to set a group address. If the indoor unit is individual, set the address to 0000; header unit, 0001; follower unit, 0002.

• Individual: 0000

• Header unit: 0001 (In case of group control)

• Follower unit: 0002 (In case of group control)

10. Push SET button. (It is OK if the display turns on.)

11. Push TEST button. The address setting is complete. (SETTING flashes. You can control the unit after SETTING has disappeared.)

NOTE:

1. Do not use address numbers 29 or 30 when setting system addresses using the remote controller. These 2 address numbers cannot be used on outdoor units and the CODE No. [E04] (Indoor / outdoor communication error) will appear if they are mistakenly used.

2. If you set addresses to indoor units in 2 or more refrigerant lines manually using the remote controller and will control them centrally, set the header outdoor unit of each line as below:

• Set a system address for the header outdoor unit of each line with SW13 and 14 of their interface P.C. boards.

• Turn off dip switch 2 of SW30 on the interface P.C. boards of all the header outdoor units connected to the same central control, except the unit that has the lowest address. (For unifying the termination of the wiring for the central control of indoor and outdoor units)

• Connect the relay connectors between the [U1, U2] and [U3, U4] terminals on the header outdoor unit of each refrigerant line.

• After finishing all the settings above, set the address of the central control devices. (For the setting of the central control address, refer to the installation manuals of the central control devices.)

To see the indoor unit address of an individual unit or a group-controlled unit (when you know its position):

(Execute it while the units are running.)

1. Push the ON/OFF button if the units stop.

2. Push the UNIT LOUVER button (left side of the button). A unit number like 1-1 (system address – indoor unit address) is indicated on the LCD (it will disappear after a few seconds). When 2 or more indoor units are connected (group-controlled), a number of other connected units appears each time you push the UNIT LOUVER button (left side of the button).

To find an indoor unit’s position from its address (when checking unit numbers controlled as a group):

(Execute it while the units are stopped.)

1. Push and hold the VENT and TEST buttons at the same time for more than 4 seconds.

• ALL appears on UNIT No. on the LCD display.

• The fans and louvers of all the indoor units in the group are activated.

2. Push the UNIT LOUVER button (left side of the button). Each time you push the button, the indoor unit numbers are indicated one after another.

• The first-indicated unit number is the address of the header unit.

• Only the fan and louvers of the indicated indoor unit are activated.

3. Push the TEST button to finish the procedure. All the indoor units in the group stop.

To check all the indoor unit addresses using an arbitrary wired remote controller (When communication wirings of 2 or more refrigerant lines are interconnected for central control):

(Execute it while the units are stopped.)

1. Push and hold the TIME (UP) and TEST buttons at the same time for more than 4 seconds. At first, line 1 and CODE No. AC (Address Change) are indicated on the LCD display. (Select an outdoor unit.)

2. Push the UNIT LOUVER button (left side of the button) and SWING/FIX buttons repeatedly to select a system address.

3. Push the SET button to confirm the system address selection.

• The address of an indoor unit connected to the selected refrigerant line is indicated on the LCD display and its fan and louvers are activated.

4. Push the UNIT LOUVER button (left side of the button). Each time you push the button, the indoor unit numbers of the selected refrigerant line are indicated one after another.

• Only the fan and louvers of the indicated indoor unit are activated.

To select another system address:

5. Push the CL button to return to step 2.

• After returning to step 2, select another system address and check the indoor unit addresses of the line.

6. Push the TEST button to finish the procedure.

This method is for changing the address of an individual indoor unit (paired one-to-one) or an indoor unit in a group. (Available when addresses have already been set automatically.)

(Execute it while the units are stopped.)

1. Push and hold the SET, CL, and TEST buttons at the same time for more than 4 seconds. (If 2 or more indoor units are controlled in a group, the first indicated UNIT No. is that of the head unit.)

2. Push the UNIT LOUVER button (left side of the button) repeatedly to select an indoor unit number to change if 2 or more units are controlled in a group. (The fan and louvers of the selected indoor unit are activated. The fan of the selected indoor unit is turned on.)

3. Push the TEMP. (UP/DOWN) buttons repeatedly to select 13 for CODE No.

4. Push the TIME (UP/DOWN) buttons repeatedly to change the value indicated in the SET DATA section to that you want.

5. Push the SET button.

6. Push the UNIT LOUVER button (left side of the button) repeatedly to select another indoor UNIT No. to change.

Repeat steps 4 to 6 to change the indoor unit addresses so as to make each of them unique.

7. Push the UNIT LOUVER button (left side of the button) to check the changed addresses.

8. If the addresses have been changed correctly, push the TEST button to finish the procedure.

(The method is available when the addresses have already been set automatically. When communication wirings of 2 or more refrigerant lines are interconnected for central control.)

NOTE: You can change the addresses of indoor units in each refrigerant line using an arbitrary wired remote controller. Enter the address check / change mode and change the addresses.

(Execute it while the units are stopped.)

1. Push and hold the TIME (UP) / (DOWN) buttons at the same time for more than 4 seconds. At first, the line 1 and CODE No. AC (Address Change) are indicated on the LCD display.

2. Push UNIT LOUVER button (left side of the button) and SWING/FIX buttons repeatedly to select a system address. (If no number appears on UNIT No., no outdoor unit exists on the line. Push button and select another line following step 2.)

3. Push the SET button.

• The address of one of the indoor units connected to the selected refrigerant line is indicated on the LCD display and the fan and louvers of the unit are activated.

• At first, the current indoor unit address is displayed in SET DATA. (No system address is indicated.)

4. Push the TIME (UP) / (DOWN) buttons repeatedly to change the value of the indoor unit address in SET DATA. Change the value in SET DATA to that of a new address.

5. Push the SET button to confirm the new address on SET DATA.

6. Push the UNIT LOUVER button (left side of the button) repeatedly to select another address to change. Each time you push the button, the indoor unit numbers in a refrigerant line are indicated one after another. Only the fan and louvers of the selected indoor unit are activated.

Repeat steps 4 to 6 to change the indoor unit addresses so as to make each of them unique.

7. Push the SET button. (All the segments on the LCD display light up.)

8. Push the TEST button to finish the procedure.

Clearing an error of the outdoor unit:

Clear the currently detected outdoor unit for each refrigerant line to which the indoor unit controlled by the remote controller is connected. (The indoor unit error is not cleared.) Use the service monitoring function of the remote controller.

1. Push and hold the CL, and TEST buttons for 4 seconds or longer to enter the service monitoring mode.

2. Push the TEMP. (UP/DOWN) button to set CODE No. to “FF”.

3. The display in A (SET DATA section) of the figure counts down as follows at 5-second intervals: “0005” → “0004” → “0003” → “0002″ → “0001” → “0000”. The error is cleared when “0000” appears. However, the display counts down from “0005” again.

4. Push the TEST button to return the display to normal.

Clearing an error of the indoor unit:

Push the ON/OFF button on the remote controller. (Only the error of the indoor unit controlled by the remote controller will be cleared.)

The following monitoring function is available if the remote controller is RBC-ATM32E. Enter the service monitoring mode using the remote controller to check the sensor temperature or operation status of the remote controller, indoor unit, and outdoor unit.

1. Push and hold the TEST and CL buttons for 4 seconds or longer to enter the service monitoring mode. The service monitor lights up. The temperature of CODE No. 00 appears at first.

2. Push the TEMP. (UP/DOWN) button to change to CODE No. of the item to monitor. Refer to the following table for CODE No.

3. Push the left part of the UNIT LOUVER button (left side of the button) to change to the item to monitor. Monitor the sensor temperature or operation status of the indoor unit and outdoor unit in the refrigerant line.

4. Push the TEST button to return the display to normal.

Target outdoor unit data (SMMS, SHRM, Mini-SMMS – Series 1 – 2):

Individual data of outdoor unit *3 (CODE No. varies by U1, U2, U3, U4)

*1 In the case of group connection, only the header indoor unit data can be displayed.

*2 01 … Only compressor 1 is on

10 … Only compressor 2 is on

11 … Both compressor 1 and 2 are on

*3 The upper digit of CODE No. indicates the outdoor unit No.

U1 outdoor unit (Header unit)

U2 outdoor unit (follower unit 1)

U3 outdoor unit (follower unit 2)

U4 outdoor unit (follower unit 3)

1. D501 (Red)

• Lights up when the power is turned on (Microcomputer works)

• Blinks at 1-second intervals (0.5-second): No EEPROM, or writing error

• Blinks at 10-second intervals (5-second): No DISP mode

• Blinks at 2-second intervals (1-second): Function change being set (EEPROM)

2. D403 (Red)

• Lights up (on hardware) when the power is supplied to the remote controller

(a) Applicable models: All Super Module Multi (SMMS, SHRM, Mini-SMMS, SMMS-i) models. (Indoor units: MMO-APOOO, Outdoor units: MMY-MAPOOOO*, MCY-MAPOOOHT*)

(b) Tools and measuring devices required:

• Screwdrivers (Philips, flat head), spanners, long-nose pliers, nipper, pin to push reset switch, etc.

• Multimeter, thermometer, pressure gauge, etc.

(c) Things to check prior to troubleshooting (behaviors listed below are normal):

When a fault occurs, proceed with troubleshooting in accordance with the procedure shown below:

If an “E28” error occurs:

1. Investigate check code displayed on interface P.C. board of header unit.

2. Investigate check code displayed on interface P.C. board of relevant follower unit.

3. Check fault site or faulty part.

For any other fault:

1. Investigate check code displayed on interface P.C. board of header unit.

2. Check fault site or faulty part.

NOTE: Rather than a genuine fault, the problem could have been caused by a microprocessor malfunction attributable to a poor quality of the power source or an external noise. Check for possible noise sources, and shield the remote controller wiring and signal wires as necessary.

The remote controllers (main remote controller and central control remote controller) and the interface P.C. board of an outdoor unit are provided with an LCD display (remote controller) or a 7-segment display (outdoor interface P.C. board) to display operational status. Using this self-diagnosis feature, the fault site / faulty part may be identified in the event of a fault by following the method described below.

Analyze the check code according to where it is displayed and work out the nature of the fault in consultation with the list of check codes.

• When investigating a fault on the basis of a display provided on the indoor remote controller or TCC-LINK central control remote controller – See the “TCC-LINK remote controller or main remote controller display” section of the list.

• When investigating a fault on the basis of a display provided on an outdoor unit – See the “Outdoor 7-segment display” section of the list.

• When investigating a fault on the basis of a wireless remote controller-controlled indoor unit – See the “Light sensor indicator light block” section of the list.

(1) Checking and testing

When a fault occurs to an air conditioner, a check code and indoor unit No. are displayed on the display window of the remote controller. Check codes are only displayed while the air conditioner is in operation. If the display has already disappeared, access error history by following the procedure described below.

(2) Error history

The error history access procedure is described below (up to four errors stored in memory). Error history can be accessed regardless of whether the air conditioner is in operation or shut down.

To be performed when system at rest

1. Invoke the SERVICE CHECK mode by pressing the SET TEST and CL buttons simultaneously and holding for at least 4 seconds. The letters “SERVICE CHECK” light up, and the check code “01” is displayed, indicating the error history. This is accompanied by the indoor unit No. to which the error history is related and a check code.

2. To check other error history items, press the TEMP up/down button to select another check code. Check code “01” (latest) → Check code “04” (oldest). Note: Error history contains four items.

3. When the TEST button is pushed, normal display is restored.

REQUIREMENT: Do not push the CL button as it would erase the whole error history of the indoor unit.

How to read displayed information:

<7-segment display symbols> 0123456789AbCdEFHJLP

0 1 2 3 4 5 6 7 8 9 A b C d E F H J L P

(1) Checking and testing

When a fault occurs to an air conditioner, a check code and indoor unit No. are displayed on the display window of the remote controller. Check codes are only displayed while the air conditioner is in operation. If the display has already disappeared, access error history by following the procedure described below.

(2) Error history

The error history access procedure is described below (up to four errors stored in memory). Error history can be accessed regardless of whether the air conditioner is in operation or shut down.

1. Push the TEST SET and CL buttons simultaneously and hold for at least 4 seconds.

2. The letters “SERVICE CHECK” light up, and the check code “01” is displayed.

3. When a group No. is selected (blinking), if there is an error history, the UNIT No. and the latest error history information are displayed alternately. * During this procedure, the temperature setting feature is unavailable.

4. To check other error history items, push the TEMP up/down button to select another check code (01-04.).

5. To check check code relating to another group, push (ZONE) and (GROUP) buttons to select a group No. Do not push the CL button as it would erase the whole error history of the selected group.

6. To finish off the service check, push the TEST button.

To identify the check code, check the 7-segment display on the header unit. To check for check codes not displayed on the 7-segment display, consult the “List of Check Codes (Indoor Unit)” in “9-2. Troubleshooting method”.

The light block indicators (Operation, Timer, Ready) will light up or blink in different patterns to indicate a specific check code and cause of fault. Refer to the detailed tables in the manual for specific light patterns and their corresponding check codes and fault descriptions.

Legend for light patterns:

• Light Off: Goes off

• Solid Light: Lighting

• Blinking Light: Blinking (0.5 seconds)

For example, if all lights are out, it means power turned off or error in wiring between receiving and indoor units.

Other indications not involving check code:

• Operation, Timer, Ready all blinking synchronously: Test run in progress.

• Operation solid, Timer and Ready blinking alternately: Setting incompatibility (automatic cooling / heating setting for model incapable of it and heating setting for cooling-only model).

Measure the resistance value of each winding by using the tester.

For ICF-340W150-1, 2 (MMD-AP0076BHP* – AP0186BHP*):

For ICF-340W250-1 (MMD-AP0246BHP* – AP0306BHP*, MMD-AP0366BHP* – AP0566BHP*):

All measurements are under 20 °C.

The fan motor inside wiring diagram shows connections for Red (1), White (2), and Black (4, 5) wires.

The electrically erasable programmable read-only memory (hereinafter EEPROM) mounted on an indoor P.C. board holds important setting data, including the type and capacity codes intrinsic to the model (set at the factory), as well as the line / indoor / group addresses, high ceiling adjustment setting and the like (during installation, either automatically or manually). Proceed with the replacement of an indoor P.C. board assembly in accordance with the procedure described below.

After completion of the work, check the settings again, including the indoor unit No. and group header / follower designation, and confirm the integrity of the refrigerating cycle by conducting a test operation, etc.

Applicable Part code: 43T6V444, Model type: MMD-AP**6BHP series, P.C. board type: MCC-1631.

This method is used if it is possible to turn on the indoor unit and read the setting data from the P.C. board to be replaced via a wired remote controller.

1. Reading EEPROM data: Procedure 1

2. Replacing P.C. board and turning on power: Procedure 2

3. Writing EEPROM data in new EEPROM: Procedure 3

4. Resetting power supply (applicable to all indoor units connected to remote controller in case of group operation)

This method is used if it is not possible to turn on the indoor unit or read the setting data from the P.C. board to be replaced via a wired remote controller or operate the remote controller due to the failure of its power supply circuit.

1. Replacing EEPROM (For the location of this component and the method to replace it, see the “EEPROM location diagram” section.)

• The EEPROM on the P.C. board to be replaced needs to be removed and mounted on the service P.C. board.

2. Replacing P.C. board and turning on power: Procedure 2

3. Reading EEPROM data: Procedure 1

• If data cannot be read, go to Method 3.

4. Replacing EEPROM again (For the location of this component and the method to replace it, see the “EEPROM location diagram” section.)

• The old EEPROM, supplied with the P.C. board to be replaced and now mounted on the service P.C. board, needs to be replaced with the new EEPROM, supplied with the service P.C. board.

5. Replacing P.C. board and turning on power: Procedure 2

6. Writing EEPROM data in new EEPROM: Procedure 3

7. Resetting power supply (applicable to all indoor units connected to remote controller in case of group operation)

This method is used if it is not possible to read the setting data due to the failure of the EEPROM itself.

1. Replacing P.C. board and turning on power: Procedure 2

2. Writing EEPROM data on basis of information supplied by customer (e.g. External static pressure selection setting and optional connection setting): Procedure 3

3. Resetting power supply (applicable to all indoor units connected to remote controller in case of group operation)

EEPROM layout:

EEPROM is attached to IC socket. To remove it, use a pair of tweezers, etc.

To attach EEPROM, arrange the direction as shown in the figures in the manual.

In exchanging time, pay attention not to bend the lead wire of IC.

The diagram shows the EEPROM location on the P.C. board, near components like J01, CN73, T01, IC503, C08, SW501, IC101, C09. It also illustrates how to cut out the EEPROM and IC socket.

(Read the setting data from EEPROM, including both the factory settings and any modifications made to them on site.)

1. Push the TEST SET, CL, and buttons simultaneously and hold for at least 4 seconds. (This number corresponds to the same number shown on the Remote Controller Operation Diagram.)

* In the case of group control, the unit No. displayed first is the indoor unit No. of the header unit.

At the same time, the CODE No. (DN code) 10 is displayed, and the fan of the selected indoor unit comes on, with the louver swinging, depending on the model.

2. Each time the UNIT LOUVER button (left side of the button) is pushed, one of the indoor unit No. under group control is displayed in turn.

* The fan of the selected indoor unit comes on, with the louvers swinging, depending on the model.

3. The TEMP up/down button allows you to move the CODE No. (DN code) up / down by one place.

4. First, change the CODE No. (DN code) from 10 to 01. (To set filter sign lighting time). Jot down the setting data displayed.

5. Change the CODE No. (DN code) using the TEMP up/down button. Again, jot down the setting data displayed.

6. Repeat step 5 until all the setting data has been jotted down. (See the CODE No. list.) * CODE No. (DN code) go from 01 to FF with a few gaps along the way.

7. When finished, push the TEST button to bring the system back to normal off state. (It takes the system about 1 minute to become responsive to remote controller operation.)

CODE No. (DN code) necessary at minimum:

The type and capacity of the indoor unit are necessary for fan speed setting.

1. Replace the faulty P.C. board with a service P.C. board.

Be sure to replicate the old jumper setting (removal), switch setting (SW501), and connector short-circuit setting (e.g. CN34) on the service P.C. board. (See the diagram in the manual.)

CAUTION: Don’t remove the materials. No materials. The power I.C. (IC101) may break. Perform the same setting of the jumper wire(J01) setting(cut), switch(SW501) as the setting of the P.C. board before replacement.

2. It is necessary to establish a one-to-one correspondence between the indoor unit being serviced and the remote controller.

Turn on the indoor unit using one of the methods described below according to the system configuration.

(1) Single (stand-alone) operation

Turn on the indoor unit and proceed to Procedure 3.

(2) Group operation

A) If it is possible to selectively turn on the indoor unit being serviced: Turn on the indoor unit being serviced and proceed to Procedure 3.

B) If it is not possible to selectively turn on the indoor unit being serviced (Case 1):

a) Temporarily disconnect the group control wiring from terminals A and B of the indoor unit being serviced.

b) Connect the remote controller wiring to the terminals, turn on the indoor unit, and proceed to Procedure 3.

* If this method cannot be used, proceed to the alternative method described below (Case 2).

C) If it is not possible to selectively turn on the indoor unit being serviced (Case 2):

a) Remove the CN41 connectors of all other indoor units in the same group.

b) Turn on the indoor unit and proceed to Procedure 3.

* Be sure to restore the temporarily removed group control wiring and CN41 connectors to their initial states after Procedure 3 has been completed.

(The EEPROM of the service P.C. board has been set to the factory default values.)

1. Push the TEST SET, CL, and buttons simultaneously and hold for at least 4 seconds. (Under UNIT No., ALL is displayed.) At the same time, the CODE No. (DN code) 10 is displayed, and the fan of the indoor unit comes on, with the louver swinging, depending on the model.

2. Push the left part of the UNIT LOUVER button (left side of the button) to display the indoor unit No. one by one in the group control. Specify the indoor unit No. whose service PC board was replaced. (This operation is not available if the UNIT No. shows ALL.)

3. The TEMP up/down button allows you to moved the CODE No. (DN code) up / down by one place.

4. First, set the type and capacity codes of the indoor unit. (Changing the type and capacity codes in EEPROM overwrites the factory default settings.)

(1) Set the CODE No. (DN code) to 10 (no change)

(2) Use the TIME button to select the type. (For example, 0001 is for the 4-way cassette type.) – See the CODE No. list.

(3) Push the SET button. (The display should change from flashing to steady.)

(4) Use the TEMP up/down button to set the CODE No. (DN code) to 11.

(5) Use the TIME button to set the capacity code. (For example, 0012 is for the 027 type.) – See the CODE No. list.

(6) Push the SET button. (The display should change from flashing to steady.)

(7) Push the TEST button to bring the system back to normal off state.

5. Next, write any setting changes made on-site after installation, such as address settings, in the EEPROM. Perform the tasks specified in step 1 again.

6. Use the TEMP up/down button to set the CODE No. (DN code) to 01 (To set filter sign lighting time)

7. Check the value displayed with the value jotted down in Procedure 1 and information proved by the customer.

(1) If there is a discrepancy, change the setting in accordance with the jotted-down value, and push the SET button. (The display should change from flashing to steady.)

(2) If there is no discrepancy, do nothing.

8. Use the TEMP up/down button to change the CODE No. (DN code). Again, check the value, and change the setting if necessary.

9. Repeat steps 6 and 7 until all the settings are checked.

10. When finished, push the TEST button to bring the system back to normal off state.

* In the case of group operation, turn the unit off, reconnect the indoor-indoor group control wiring and CN41 connectors, and turn on all the indoor units. (It takes the system about 1 minute to become responsive to remote controller operation.)

* CODE No. (DN code) go from 01 to FF with a few gaps along the way.

If you realize you have wrongly corrected a certain setting after pushing the SET button, you can recover the initial value by pushing the CL button, provided that the CODE No. (DN code) is yet to be changed.

1. Detachment

1) Slide the filter toward the opposite side of the arrow mark and then pull out the filter. (In the case that two filters are provided, pull out the first filter, then the second filter will be pulled out connected with the first filter.)

2. Attachment

1) Insert the filter in the filter rail toward the arrow mark, slide it until the filter stops and then fix it. (In the case that two filters are provided, insert the second filter in the same direction after inserting the first filter.)

NOTE: In a section, Detachments, the models are expressed as follows for convenience.

AP007: MMD-AP0076BHP-E(TR) to AP0186BHP-E(TR)

AP024: MMD-AP0246BHP-E(TR) to AP0306BHP-E(TR)

AP036: MMD-AP0366BHP-E(TR) to AP0566BHP-E(TR)

1. Detachment

1) Remove the fixing screws A which fix the suction panel. Loosen the fixing screws B.

2) Slide the suction panel to the arrow side and then remove the panel.

2. Attachment

1) Hook the suction panel to the fixing screws B and tighten screws.

2) Attach the removed screws A to the original positions.

(Diagrams show locations for AP007 Type, AP024 Type, and AP036 Type, distinguishing between under air intake and back air intake configurations.)

1. Detachment

1) Remove the screw A of the electric parts box cover to loosen screw B.

2) As shown in the right figure, when sliding it toward arrow direction and pulling to this side, the electric parts cover opens using the hinge part as a shaft.

3) Take off the slit of the electric parts box cover from the projection of the side plate and then remove the cover.

2. Attachment

1) Hook the slit of the electric parts box cover to the projection of the side plate, close the cover, enter screw B in the Key hole and then slide it.

2) Fix the electric parts box cover by tightening with screws A and B.

1. Detachment

1) Perform works of 1 of Air filter detachment. (In case of under air intake) Perform works of 1 of Suction panel detachment. (In case of back air intake) Perform works of 1 of Electric parts box cover detachment.

2) Remove the indoor/outdoor connecting wire and remote controller wire from each terminal block.

3) Remove the connectors which connected from the control P.C. board to other parts.

NOTE: First unlock the housing and then remove the connectors.

CN34 : Float switch (3P, Red)

CN41 : Remote controller terminal block (3P, Blue) (Screw part of terminal block, 2P.)

CN504: Drain pump (2P, White)

CN67 : Power supply terminal block (5P: Black) (Screw part of terminal block, 3P.)

CN101: TC sensor (2P: Black)

CN102: TCJ sensor (2P, Red)

CN104: Room temperature (2P, Yellow)

4) Remove screws. (Ø4 x 10, 2 pcs.)

5) Slide the electric parts box toward the arrow mark and then remove the box from the bottom side of the main unit.

2. Attachment

1) Attach the electric parts box and then perform wiring as original.

Notes 1: Check there is no missing or contact failure on the connectors.

Notes 2: Be sure to perform wiring as original.

2) Attach air filter, suction panel, and electric parts box as original.

1. Detachment

1) Perform work of 1 of Electric parts box detachment. (In the works of 1 of Electric parts box detachment, removal of the control P.C. board is available even if you do not perform works after step 4)).

2) Unlock the card edge spacers (5 positions) in the electric parts box to remove the control P.C. board.

2. Attachment

1) Mount control P.C. board in the electric parts box as original.

2) Attach the electric parts box as original.

3) Be sure to perform wiring as original in the electric parts box.

NOTE: Check there is no missing or contact failure on the connectors.

4) Attach each air filter, suction panel or electric parts box cover as original.

CAUTION: When replacing P.C. board, check no-mex paper is attached.

1) Open cover of the electric parts box and then remove relay connector of the PMV motor.

2) As shown in the right figure, using a double spanner, open the check port at the side face and then remove the PMV motor.

1. Detachment

1) Perform works until opening of the electric parts box cover in works of 1 of Electric parts box detachment.

2) Remove connectors for fan motor wiring from control P.C. board.

CN333: Motor power supply (5P: White)

CN334: Motor control (5P: White)

3) Open the fan case (under) and remove it while pressing claws of the fan case (under). (There are both sides of the case)

4) Remove the fixing screws (Ø5 x 10, 2 pcs.) of the fixing plate (2 pcs.) at the side of the fan motor. (The fan motor becomes temporal hanging status by fixing plate.)

5) While supporting the fan motor by hands, remove the fixing plate from the motor base to remove the fan motor.

6) Loosen the hexagonal screw hole of the fan and then pull out the fan from the shaft. (Hexagon wrench : 3mm)

2. Attachment

1) Insert the fan in the shaft while adjusting to match the hexagonal screw hole to the groove of the shaft.

2) Perform screwing the fan motor with the fixing plate (Ø5 x 10, 2 pcs.)

NOTE: Match the fan motor with turning direction of the fan and fix so that the AP007 type and AP024 type fan motor wirings are at refrigerant piping side and AP036 type is at opposite side of refrigerant piping.

3) While positioning so that the fan is at the center of the fan case (upper), fix the fan with hexagonal screw.

NOTE: Be sure to use a torque wrench for fixing and tighten with 4.9N•m or more.

4) Attach the fan case (under) as original and check the fan turns smoothly without coming to contact with the fan case.

5) Connect the fan motor wirings as before, close and fix the electric parts box cover. Be sure to perform wirings as original in the electric parts box.

6) Attach air filter and suction panel as original position.

CAUTION: When replacing the fan motor, be sure to exchange the clamp filter with the fan motor lead wire.

1. Detachment

1) Remove the drain cap and then extract the drain water accumulated in the drain pan.

NOTE: When removing the drain cap, be sure to receive drain water using a bucket, etc.

2) Loosen screws which fix the bottom base. (3 positions) (For AP036 models, remove 2 screws at the center.)

3) As shown in the right figure, when sliding it toward arrow direction, the electric parts cover the bottom base opens using the hinge part as a shaft.

4) Hold handle of the drain pan and then pull off slowly.

CAUTION: When removing the drain pan, do not hold the drain socket. (Water leakage may be caused.)

2. Attachment

1) First hook the thin side of the drain pan to the discharge panel and then push in the thick side.

2) Close the bottom base and fix it with screws.

1. Detachment

1) Perform works until opening of the electric parts box cover in works of 1 of Electric parts box detachment.

2) Remove the connectors which connect to float switch of the drain pump from the control P.C. board.

CN34 : Float switch (3P, Red)

CN504 : Drain pump (2P, White)

3) Remove the fixing screws (2 positions) of the check cover and then take out the check cover. (To the check cover, the drain pump and float switch are attached.)

4) Pick up the hose band, shift from the pump connecting part, remove the drain hose and then remove the check cover.

5) Remove screws which fix the drain pump assembly and then remove the drain pump assembly. (Ø4 x 10, 3 pcs.)

6) Remove the resin nut switch and then remove the float switch from the fixing plate.

2. Attachment

1) Using the removed screws, fix the drain pump assembly as original.

2) Using the removed resin nut, fix the float switch as original.

3) Connect the drain hose as original and then attach the hose band.

4) Connect the drain pump and the float switch wiring as original and close the electric parts box cover for fixing. Be sure to perform wiring in the electric parts box as original.

5) Enter the corners (2 positions) of the check cover in the entering part and then fix it using fixing screws (2 positions).

1. Detachment

1) Recover the refrigerant gas and then remove the refrigerant pipe of the indoor unit.

2) Perform works of 1 of Drain pan detachment.

3) Pull out TC sensor and TCJ sensor wirings from the holder.

4) Remove the screws (Ø4 x 8, 2 pcs.) and then remove the piping cover.

5) Remove screws (Ø4 x 8, 1pc.) of the heat exchanger fixed plate.

6) While holding the heat exchanger, remove the fixed screws (Ø4 x 8, 2 pcs.) of the end plate and then take out the heat exchanger slowly.

2. Attachment

1) Set the heat exchanger at the original position and fix it as before, using screws which removed the end plate, heat exchanger fixed plate and piping cover.

2) Enter TC sensor and TCJ sensor wirings in the holder and then perform wirings as original.

3) Attach the drain pan and the bottom base as original.