TOSHIBA MMU-UP0121MHP-E (01) PDF DOCUMENT

WARNING

• Install the air conditioner at an enough strong 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 of 2.5 m 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 contact with a revolving fan or active electricity.

CAUTION

• Do not install in a location where flammable gas leaks are possible. If the gas leaks and accumulates around the unit, it may ignite and cause a fire.

• When an outdoor unit using R32 refrigerant is combined with an indoor unit, be attentive to the floor area in the room to be installed. Indoor units cannot be installed in rooms with a floor area less than the minimum floor area. For details, follow the Installation Manual for the outdoor unit.

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.

Avoid installing in the following places:

• A place exposed to air with high salt content (seaside area), or a 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 a place near machines in a factory. (Oil adhering to the heat exchanger and resin parts in the indoor unit may reduce performance, generate mist or dew drop, or deform or damage resin parts.)

• Places where iron or other metal dust is present. If iron or other metal dust adheres to or collects on the interior of the air conditioner, it may spontaneously combust and start a fire.

• A place where organic solvent is used nearby.

• A place close to a machine generating high frequency.

• A place where the discharged air blows directly into the window of the neighbor house (Outdoor unit).

• A 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.)

• A 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.)

• A place where any 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.

• A place where organic solvent is used.

• A place near a door or window exposed to humid outside air (Dew dropping may form.).

• A place where special spray is used frequently.

Ensure there is sufficient space to install the unit and to perform maintenance work as and when required. Keep 15 mm or more for clearance between the top plate of the indoor unit and the ceiling surface. The following clearances are required:

• 15 mm or more above the unit.

• 122 mm or more on the side with refrigerant/drain pipes.

• 271 or more on the side with the electrical control box.

• 1000 mm or more below the unit to the nearest obstacle.

Additionally, set a service check opening panel at the electrical control box side of the unit (size: 450 x 450 mm or more) for piping, maintenance, and servicing.

In case of continued operation of the indoor unit under high-humidity conditions as described below, dew may condense and water may drop. Especially, a 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 the inside of the ceiling as a fresh air take-in path.

3. Kitchen

REQUIREMENT: 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 10 mm or more thick.)

The installable ceiling height depends on the model type:

When the height of the ceiling exceeds the standard distance, the warm air is difficult to reach the floor. It is necessary to change the setup value of the high ceiling setting or discharge direction.

Height list of ceiling possible to be installed (Unit: m)

REQUIREMENT: When high ceiling (1) or (3) is used with 4-way blowing, a draft is easily recognized due to a drop of discharge temperature.

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 the indoor unit unpacked is necessary, be sure to use 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.

Opening a ceiling and installation of hanging bolts:

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

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

• 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.

• Procure hanging bolts (M10 or W3/8, 4 pieces) and nuts (M10 or W3/8, 12 pieces) locally.

Installation of ceiling opening and hanging bolt:

1. Attach a nut (locally procured) and the washer (accessory) to each hanging bolt.

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

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

4. Detach the installation gauge (accessory) from the installation pattern.

5. Using the installation gauge, check and adjust the positional relation between the indoor unit and the ceiling opening (2.5 – 9.5 mm: 4 sides) and the hanging-up height (23 – 28 mm: 4 corners).

CAUTION: Before installation of the indoor unit, remove the tape that holds the fan and bell mouth. Running the unit without removing the tape may damage the fan motor.

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

Piping / Heat insulating material:

• Piping: Hard vinyl chloride pipe VP25 (Outer dia.: 32 mm)

• Heat insulator: Foam polyethylene: Thickness 10 mm or more

General Instructions:

• For the length of the traversing drain pipe, restrict it to 20 m or less.

• In case of a long pipe, provide support brackets with an interval of 1.5 to 2 m in order to prevent waving.

• Set the drain pipe with a downward slope (1/100 or more), and do not make swelling or trap on the piping. It may cause an abnormal sound.

• Be sure not to apply force to the connecting part of the drain pipe.

• Connect hard vinyl chloride pipes securely using an adhesive for vinyl chloride to avoid water leakage.

• The hard vinyl-chloride pipe cannot be directly connected to the drain pipe connecting port of the indoor unit. Use the attached flexible hose and hose band.

• Be sure to perform heat insulation of the drain pipes of the indoor unit, including the connecting part.

Check the draining:

1. 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 heating period.

2. Using a pitcher or hose, pour water (1500 to 2000 cc) into the discharge port before installation of the ceiling panel. Pour water gradually so that it does not spread on the motor of the drain pump.

CAUTION: Pour water gently so that it does not spread around inside the indoor unit, which may cause a malfunction.

3. After the electric work has finished, pour water during COOL mode operation. Test water drain while checking the operation sound of the drain pump motor. (If the operation sound changes from continuous to intermittent, water is normally drained.)

Perform heat insulating:

• As shown in the figure, cover the flexible hose and hose band with the attached heat insulator up to the bottom of the indoor unit without a gap.

• Cover the drain pipe seamlessly with a heat insulator to be procured locally so that it overlaps with the attached heat insulator of the drain connecting section.

• Direct the slits and seams of the heat insulator upward to avoid water leakage.

Refrigerant piping material: Use seamless phosphorous de-oxidized copper pipe.

CAUTION: Use flare nuts that are included with the unit. Using different flare nuts may cause refrigerant gas leakage.

Flaring:

1. Cut the pipe with a pipe cutter. Remove burrs completely. (Remaining burrs may cause gas leakage.)

2. Insert a flare nut into the pipe, and flare the pipe. Use the flare nut provided with the unit or the one used for the R32 or R410A refrigerant.

Connecting refrigerant piping:

• Use two wrenches to connect the indoor unit pipe.

• Use the tightening torque levels as listed in the following table.

Heat insulation process:

• Apply heat insulation for the pipes separately at the liquid side and gas side.

• For the heat insulation to the pipes at gas side, be sure to use the material with a heat-resisting temperature of 120°C or higher.

• Using the attached heat insulation material, apply the heat insulation to the pipe connecting section of the indoor unit securely without a gap.

WARNING:

• Use the specified wires for wiring and connect the terminals. Securely fix them to prevent external forces applied to the terminals from affecting the terminals.

• Connect earth wire (grounding work). Incomplete grounding can cause an electric shock.

• Appliance shall be installed in accordance with national wiring regulations.

CAUTION:

• For the communication line, use wires with the same type and size.

• Install an earth leakage breaker that is not tripped by shock waves.

• Use the cord clamps attached to the product.

• Do not damage or scratch the conductive core and inner insulator of power and system interconnection wires when peeling them.

• Perform the electric wiring so that it does not come into contact with the high-temperature part of the pipe.

REQUIREMENTS:

• For power supply wiring, strictly conform to the Local Regulation in each country.

• For the power supply of the indoor unit, prepare the exclusive power supply separated from that of the outdoor unit.

• Power supply wire specification: Cable 3-core 2.5 mm², in conformity with Design 60245 IEC 57.

• Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes is complete.

REQUIREMENT:

• Connect the wires matching the terminal numbers. Incorrect connection causes a trouble.

• Route the wire through the wire connection port of the indoor unit.

• The low-voltage circuit is provided for the control wire and remote controller wire. (Do not connect the high-voltage circuit.)

Steps:

1. Loosen the two screws, and remove the cover of the electrical control box by sliding it in the direction of the arrow.

2. Connect the power supply wire, control wiring, and remote controller wire to the terminal block of the electrical control box.

3. Tighten the screws of the terminal block, and fix the wires with the cord clamp attached to the electrical control box. (Do not apply tension to the connecting section of the terminal block.)

4. Mount the cover of the electrical control box without pinching wires. (Mount the cover after wiring on the ceiling panel.)

Be sure to stop the air conditioner before making settings.

CAUTION: Set only the Code No. shown in the tables. If a Code No. not listed is set, it may not be possible to operate the air conditioner or other trouble with the product may result.

Basic Procedure:

1. Push and hold the menu button and [✔] setting button simultaneously for 10 seconds or more. The display will flash.

2. Each time the [▽] [▲] setting button is pushed, indoor unit numbers in the group control change cyclically. Select the indoor unit to change settings for.

3. Push the OFF timer button to confirm the selected indoor unit.

4. Push the menu button to make the Code No. flash. Change the Code No. with the [▽] [▲] setting button.

5. Push the menu button to make the Set data flash. Change the Set data with the [▽] [▲] setting button.

6. Push the OFF timer button. By doing so, the setup is completed.

7. When all the settings have been completed, push the ON/OFF button to determine the settings. “SETTING” flashes, and then the display content disappears and the air conditioner enters the normal stop mode.

Follow the basic procedure for setting up applicable controls. The specific Code No. and Set Data for each function are provided in the tables below.

Installing indoor unit on high ceiling (Code No. 5d):

Change of lighting time of filter sign (Code No. 01):

To secure better effect of heating (Code No. 06):

How to set up swing type (Code No. F0):

How to set up louver lock (No swing) (Code No. F1, F2, F3, or F4):

Select the desired louver position from the available set data (0001 to 0005). To cancel, set the wind direction to “0000”.

Before test run:

1. By using an insulation tester (500V MΩ), check that a resistance of 1 MΩ or more exists between the terminal block L to N and the earth (grounding). If resistance is less than 1 MΩ, do not run the unit.

2. Check that the valve of the outdoor unit is opened fully.

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

Execute a test run (Wired remote controller):

1. Push and hold the OFF timer button and [▲] setting button simultaneously for 10 seconds or more. [TEST] is displayed.

2. Push the ON/OFF button.

3. Push the menu button to select the operation mode. Select [Cool] or [Heat] with the [▽] [▲] setting button, and then push the menu button (three times) again to determine the operation mode.

4. After the test run, push the OFF timer button to stop the test run. [TEST] disappears from the display.

Execute a test run (Wireless remote controller):

1. Turn on the power of the air conditioner and wait for the remote controller to become available (approx. 5 minutes for the first time, 1 minute for subsequent power-ons).

2. Push the “ON/OFF” button, select [Cool] or [Heat] with the “MODE” button, and then select [HIGH] with the “FAN” button.

3. For cooling, set the temperature to 17°C. For heating, set it to 30°C.

4. Repeatedly alternate the temperature setting (e.g., between 17°C and 18°C for cooling) by confirming the “beep” sound each time.

5. Repeat this process. The indicators on the wireless receiver section will flash, and the unit will start operation.

6. Upon completion of the test run, push the “ON/OFF” button to stop the operation.

1. Turn off the air conditioner and set the circuit breaker to OFF.

2. Open the air intake grille:

1) Loosen the fixing screw.

2) Slide the fixing bracket toward the inside.

3) Holding the air intake grille, slide the hook in the direction of the arrow and slowly open the grille.

3. Take out the air filter: Push the extrusion of the air filter away from the grille and remove.

4. Clean the filter with a vacuum cleaner or water. If dirt is heavy, use tepid water with a neutral detergent. After cleaning, dry the filter completely in a shaded place.

5. Mount the air filter back in its place.

6. Close the air intake grille, ensuring the fall-preventive strap is attached and the hook, fixing bracket, and fixing screw are secure.

7. Set the circuit breaker to ON.

CAUTION: Do not start the air conditioner while the air filter is removed.

For environmental conservation, it is strongly recommended that the indoor and outdoor units of the air conditioner in use be cleaned and maintained regularly to ensure efficient operation. When the air conditioner is operated for a long time, periodic maintenance (once a year) is recommended. As a general rule, when an indoor unit is operated for 8 hours or more daily, clean the indoor and outdoor unit at least once every 3 months. Ask a professional for this cleaning/maintenance work. Failure to clean the indoor and outdoor units regularly will result in poor performance, freezing, water leakage, and even compressor failure.

Maintenance List

You can check the troubleshooting history (up to 4 incidents) with the following procedure, either during operation or when stopped.

1. Push the OFF timer button for over 10 seconds. The indicators will appear, indicating the troubleshooting history mode has been entered. The OFF timer indicator will alternately show the [check code] and the [indoor Unit No.] where the problem occurred.

2. Each time the setting button is pushed, the recorded troubleshooting history is displayed in sequence from [01] (newest) to [04] (oldest).

3. After you have finished checking, push the ON/OFF button to return to the regular mode.

CAUTION: In the troubleshooting history mode, DO NOT push the Menu button for over 10 seconds, as doing so deletes the entire troubleshooting history of the indoor unit.

The check codes help diagnose issues with the air conditioner. The following table provides a partial list of codes and their meanings. For a complete list, refer to the tables in the installation manual.

A notice code indicates a condition requiring caution or maintenance. Even while the notice code mark is displayed, the air conditioner can operate normally.

1. Stop the operation of the air conditioner and push the Menu button and OFF timer button at the same time for 10 seconds or more.

2. The unit number of the indoor unit is displayed at the bottom left of the screen. Change it with the [▽] [▲] setting button and push the OFF timer button to confirm.

3. The history number is displayed in the center of the screen, and the Notice code No. is displayed in the lower left. You can switch the history with the setting button (a maximum of 5 notice codes).

4. Push the ON / OFF button to return to the operation stop screen.

Yes, existing R22 and R410A piping can be reused for inverter R32 product installations, but only if specific conditions are met.

WARNING: Confirming the existence of scratches or dents on the existing pipes and confirming the reliability of the pipe strength are conventionally referred to the local site. If the specified conditions can be cleared, it is possible to update existing R22 and R410A pipes to those for R32 models.

Basic conditions needed to reuse existing pipes:

Check and observe the presence of three conditions in the refrigerant piping works.

1. Dry (There is no moisture inside of the pipes.)

2. Clean (There is no dust inside of the pipes.)

3. Tight (There are no refrigerant leaks.)

Restrictions for use of existing pipes:

In the following cases, the existing pipes should not be reused as they are. Clean the existing pipes or exchange them with new pipes:

• When a scratch or dent is heavy.

• When the existing pipe thickness is thinner than specified.

• When the outdoor unit was left with the pipes disconnected, or the gas leaked from the pipes and the pipes were not repaired and refilled.

• When refrigerant cannot be recovered using a refrigerant recovery unit.

• When a commercially available dryer is attached to the existing pipes.

• When the oil is judged to be clearly different from normal oil (e.g., copper rust green in color, discolored, large quantity of residue, bad smell).

• When the air conditioner has a history of the compressor failing and being replaced.

• If the type of refrigerator oil of the existing air conditioner is other than specified types (Mineral oil, Suniso, Freol-S, MS, alkyl benzene, ester series, PVE).