TOSHIBA MMU-UP0051MHP-E (01) PDF DOCUMENT

WARNING:

• Install the air conditioner at a strong enough place to withstand the weight of the unit. If the strength is not enough, the unit may fall down, resulting in injury.

• Install the air conditioner at a height of 2.5 m or more from the floor. It is dangerous to insert hands or other objects into the unit while it operates due to the revolving fan or active electricity.

CAUTION:

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

• When an outdoor unit using R32 refrigerant is combined with the indoor unit, pay attention to the floor area of the room. 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 checks.

• Place where drained water will not cause any problem.

Avoid installing in the following places:

• Place exposed to air with high salt content (seaside area), or place exposed to large quantities of sulfide gas (hot spring). Special protective measures are needed for these locations.

• A restaurant kitchen where a lot of oil is used or a place near machines in a factory. Oil adhering to the unit may reduce performance, generate mist or dew, or damage resin parts.

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

• Place where organic solvent is used nearby.

• Place close to a machine generating high frequency.

• Place where the discharged air blows directly into the window of a neighbor’s house (for the outdoor unit).

• Place where noise from the outdoor unit is easily transmitted.

• Place with poor ventilation.

• Do not use for special purposes such as preserving food, precision instruments, art objects, or for breeding animals or growing plants.

• Place where any high-frequency appliances or inverter-type fluorescent light is installed, as it may cause malfunctions.

• For wireless remote controller use, avoid rooms with inverter-type fluorescent light or places exposed to direct sunlight.

• Place near a door or window exposed to humid outside air, as dew dropping may form.

• 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. All dimensions are in mm.

• Keep 15 mm or more for clearance between the top plate of the indoor unit and the ceiling surface.

• A space of 1000 mm or more is required in front of and on the side of the unit to avoid obstacles.

• Clearance of 271 mm or more is needed on one side, and 122 mm or more on the other.

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

• A check port (450 mm) is needed for adjusting the installation height of the indoor unit.

Requirement for high-humidity conditions:

When the humidity inside the ceiling seems to be higher than 80%, attach a heat insulator (10 mm or more thick) to the side (top) surface of the indoor unit to prevent condensation and water drops. This is especially important in kitchens, or if the unit is installed inside a ceiling with a slated roof or used as a fresh air take-in path.

When the ceiling height exceeds the standard distance, warm air may have difficulty reaching the floor. It is necessary to change the high ceiling setting or discharge direction.

Installable Ceiling Height (Unit: m)

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. The lighting time of the filter sign and the detection temperature of heating can also be changed. Refer to “7. Applicable controls” in the manual for the setting procedure.

Opening a Ceiling and Installing Hanging Bolts

1. Determine the location and orientation of the indoor unit, considering piping and wiring.

2. Open the ceiling and install M10 or W3/8 hanging bolts (4 pcs, locally procured).

3. If a ceiling already exists, lay the drain pipe, refrigerant pipe, and wiring before hanging the unit.

Installation of Ceiling Opening and Hanging Bolt

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

2. Insert a washer on both sides of the T groove of the hanging bracket on 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 position between the indoor unit and the ceiling opening (2.5 – 9.5 mm on all 4 sides) and the hanging-up height (23 – 28 mm at all 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: Perform the drain piping work so that water is properly drained, and apply heat insulation to prevent dew dropping. Inappropriate piping work may result in water leakage.

Piping / Heat Insulating Material

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

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

Instructions:

1. Use the attached flexible hose to adjust for any center discrepancy of the hard vinyl chloride pipe. Do not stretch or deform it excessively. Use it on a horizontal level.

2. Set the drain pipe with a downward slope of 1/100 or more. Do not create any swelling or traps in the piping.

3. For a traversing drain pipe, restrict the length to 20 m or less. If the pipe is long, provide support brackets every 1.5 to 2 m to prevent waving.

4. Do not apply force to the connecting part of the drain pipe.

5. The hard vinyl-chloride pipe cannot be directly connected to the drain pipe connecting port. Use the attached flexible hose and hose band for this connection.

6. Adhesive inhibited: Use the attached flexible hose and hose band to connect the drain hose to the clear drain socket. Applying adhesive will damage the socket and cause water leakage.

7. Perform heat insulation on the drain pipes, including the connecting part with the indoor unit.

Connecting Drain Pipe:

1. Connect a hard socket (locally procured) to the hard socket of the supplied flexible hose.

2. Connect a drain pipe (locally procured) to the connected hard socket using an adhesive for vinyl chloride to avoid water leakage. Allow time for the adhesive to dry before applying stress to the joint.

Drain Up Piping (If a down-gradient cannot be secured):

1. The height of the drain pipe must be 850 mm or less from the bottom of the ceiling.

2. Take the drain pipe out of the drain pipe joint within 300 mm or less from the indoor unit, and bend the pipe up vertically.

3. Immediately after the vertical bend, lay the pipe with a downward gradient.

Check the Draining

During the test run, check that water drains properly and does not leak from the connecting parts. Also, check draining when in heating mode.

1. Using a pitcher or hose, gradually pour 1500 to 2000 cc of water into the discharge port before installing the ceiling panel. Pour gently to avoid water spreading on the drain pump motor.

2. After electrical work is finished, pour water during COOL mode operation to check.

3. You can also test the drain pump by temporarily supplying power to terminals (L) and (N) after pulling out the float switch connector (CN34: Red). The pump motor should operate. If the operation sound changes from continuous to intermittent, the water is normally drained. Reconnect the float switch connector after the check.

Perform Heat Insulating

1. Cover the flexible hose and hose band with the attached heat insulator up to the bottom of the indoor unit without any gaps.

2. Cover the drain pipe seamlessly with a locally procured heat insulator, ensuring it overlaps with the attached heat insulator of the drain connecting section.

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

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

Refrigerant Piping Material:

Use seamless phosphorous de-oxidized copper pipe.

• 6.35, 9.52 and 12.7 wall thickness: 0.8 mm or more.

• 15.88 wall thickness: 1.0 mm or more.

Flaring Procedure:

1. Cut the pipe with a pipe cutter and completely remove burrs. Remaining burrs may cause gas leakage. Do not scratch the inner surface of the flared part.

2. Insert a flare nut into the pipe and flare it. Use the flare nut provided with the unit.

3. The flaring dimensions for R32 or R410A are different from those for R22. Adjust the projection margin of the copper pipe according to the table below.

Projection Margin in Flaring: B (Unit: mm)

Flaring Diameter Size: A (Unit: mm)

Connecting Piping:

Use two wrenches (double spanner) to connect the indoor unit pipe and tighten to the specified torque. Incorrect connections may cause a gas leak and trouble with the refrigeration cycle.

Use the tightening torque levels as listed in the following table. Tightening with excessive torque may crack the nut. The pressure of R32 or R410A is higher than that of R22, so it is important to use a torque wrench.

1. Evacuation:

Perform vacuuming from the charge port of the outdoor unit’s valve using a vacuum pump. Do not use the refrigerant sealed in the outdoor unit for evacuation. Use tools, such as a charge hose, manufactured exclusively for R32 or R410A.

CAUTION: Do not supply power to the indoor unit until the airtight test and vacuuming are completed. If powered on, the pulse motor valve will fully close, extending the time for vacuuming.

2. Refrigerant Amount to be Added:

Add refrigerant “R32 or R410A” referring to the Installation Manual of the outdoor unit. Use a scale to charge the specified amount. Charging an excessive or too little amount causes compressor trouble.

3. Open the Valve Fully:

Open the valve of the outdoor unit fully. Refer to the outdoor unit’s Installation Manual for details.

4. Gas Leak Check:

Check for gas leaks from the pipe connecting section or valve cap using a leak detector or soapy water. Use a leak detector manufactured exclusively for HFC refrigerant (R32, R410A, etc.).

5. Heat Insulation Process:

Apply heat insulation to the liquid and gas side pipes separately. For the gas side pipe, use a material with a heat-resisting temperature of 120°C or higher. Apply the attached heat insulation material to the pipe connecting section of the indoor unit securely without any gaps, up to the root, to prevent water leaks. Wrap the heat insulator with its slits facing up (ceiling side).

WARNING:

• Use the specified wires for wiring and connect them to the terminals securely. Incomplete connection may cause a fire.

• Connect the earth wire (grounding work). Incomplete grounding can cause an electric shock. Do not connect earth wires to gas pipes, water pipes, lightning conductors, or telephone earth wires.

• The appliance shall be installed in accordance with national wiring regulations. Capacity shortage of the power circuit or incomplete installation may cause an electric shock or a fire.

CAUTION:

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

• 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.

Indoor Unit Power Supply:

For the power supply of the indoor unit, prepare an exclusive power supply separated from that of the outdoor unit. Arrange the power supply, circuit breaker, and main switch of the indoor unit connected to the same outdoor unit so that they are commonly used.

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

REQUIREMENT: Connect the wires matching the terminal numbers. Incorrect connection causes trouble. Route the wire through the wire connection port of the indoor unit. The low-voltage circuit is for the control and remote controller wire; do not connect the high-voltage circuit.

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.

CAUTION: Make sure to fix the power supply wire with the cord clamp so that no water enters into the electrical control box through the power supply wire.

Be sure to stop the air conditioner before making settings. The settings cannot be changed using only a wireless remote controller, simple remote controller, or group control remote controller by itself; a wired remote controller must be used.

Basic Procedure:

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

2. Each time the [▽] or [▲] setting button is pushed, the indoor unit numbers in the group control change cyclically. Select the indoor unit you want to change settings for. The fan of the selected indoor unit will run for confirmation.

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 buttons.

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

6. Push the OFF timer button. The setup is completed.

7. When all settings have been completed, push the ON/OFF button to determine the settings. “SETTING” will flash, the display content will disappear, and the air conditioner will enter the normal stop mode.

CAUTION: Only set the Code Nos. shown in the manual. Setting an unlisted Code No. may cause operational problems.

When the indoor unit is installed on a ceiling higher than the standard height, make the high-ceiling setting for fan speed adjustment. Follow the basic operation procedure for settings:

1. For the CODE No. in Procedure 4, specify [5d].

2. Select the SET DATA for Procedure 5 from the “Height list of ceiling possible to be installed” table in the manual.

The settings can also be changed with the DIP switch on the receiver section P.C. board for wireless remote controller kits.

According to the installation condition, the lighting time of the filter sign (notification of filter cleaning) can be changed. Follow the basic operation procedure for settings:

1. For the CODE No. in Procedure 4, specify [01].

2. For the SET DATA in Procedure 5, select from the following table:

If it is difficult to obtain satisfactory heating, the detection temperature can be raised. Use a circulator to circulate heat air near the ceiling. Follow the basic operation procedure for settings:

1. For the CODE No. in Procedure 4, specify [06].

2. For the SET DATA in Procedure 5, select from the table below:

The swing type of the louver can be selected. Follow the basic operation procedure (steps 1-7):

1. Specify [F0] for the CODE No. in Procedure 4.

2. Select the following data for the SET DATA in Procedure 5.

• About “Dual swing”: Louvers 01 and 03 are directed and swing in one direction, and louvers 02 and 04 are directed and swing in the opposite direction.

• About “Cycle swing”: The four louvers swing independently at respective timings.

CAUTION: Do not set the swing SET DATA to “0000” as this may cause a failure of the louvers.

A position of the individual louvers (four directions) can be locked (no swing). Follow the basic operation procedure (steps 1-7):

1. Specify [F1], [F2], [F3] or [F4] for the CODE No. in Procedure 4. (F1=Refrigerant pipe side, F2=Opposite side, F3=Side, F4=Drain pipe side).

2. Select the following data for the SET DATA in Procedure 5:

• SET DATA 0001 – 0005: Corresponds to 5 fixed louver positions.

When (4) or (5) is selected, dew drop may occur during cooling mode. When the setting has been determined, the light indicator lights up.

To cancel the louver lock, set the wind direction to “0000” of the louver lock setup procedure.

Before Test Run:

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

• Check that the outdoor unit valve is opened fully.

• To protect the compressor, leave power ON for 12 hours or more before operating.

Wired Remote Controller Test Run:

1. Stop the air conditioner. Push and hold the OFF timer button and [▲] setting button simultaneously for 10 seconds or more. [TEST] will be displayed.

2. Push the ON/OFF button.

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

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

Wireless Remote Controller Test Run:

1. Turn on the power. Wait approx. 5 minutes for the remote controller to become available.

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

3. Set the temperature to 17°C (Cooling) or 30°C (Heating).

4. After a “beep”, immediately set the temperature to 18°C (Cooling) or 29°C (Heating).

5. After another “beep”, immediately set the temperature back to 17°C (Cooling) or 30°C (Heating).

6. Repeat steps 4 and 5. The indicators on the wireless receiver section will flash, and the unit will start operation.

7. Upon completion, push “ON/OFF” to stop operation.

Cleaning of air filter

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 with a vacuum cleaner. If dirt is heavy, clean the air filter using tepid water with a neutral detergent or just water. After cleaning, dry the air filter sufficiently in a shaded place.

5. Mount the air filter.

6. Close the air intake grille in the reverse order of opening it. Check that the fall-preventive strap is attached to the panel.

7. Set the circuit breaker to ON.

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

For environmental conservation and efficient operation, it is strongly recommended that the indoor and outdoor units be cleaned and maintained regularly. Periodic maintenance (once a year) is recommended for long-term operation. If an indoor unit is operated for 8 hours or more daily, clean the indoor and outdoor units at least once every 3 months. Ask a professional for this work. Failure to clean units regularly can result in poor performance, freezing, water leakage, and even compressor failure.

Maintenance List

You can check the troubleshooting history (up to 4 incidents) if a problem occurs with the air conditioner. This can be done during operation or when operation is 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. The temperature indicator shows the order of the history (01 is newest).

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.

If a problem occurs, the OFF timer indicator on the remote controller alternately shows a check code and the indoor unit number where the problem occurred. The following tables list the check codes and their meanings. (I/F: Interface P.C. Board)

A notice code is a function only in TU2C-Link communication. When the unit detects a condition requiring caution or maintenance, a spanner mark (Notice code mark) appears on the wired remote controller. The air conditioner can still operate normally. A maximum of 5 notice codes can be issued simultaneously.

Notice Code List

How to check Notice code No.

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.

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:

1. Dry: There is no moisture inside the pipes.

2. Clean: There is no dust inside the pipes.

3. Tight: There are no refrigerant leaks.

Restrictions for use of existing pipes:

The existing pipes should not be reused as they are in the following cases. 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 the specified thickness for R32/R410A.

• When the outdoor unit was left with pipes disconnected, or gas leaked from the pipes and they 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 existing air conditioner is removed after refrigerant has been recovered and the oil is clearly different from normal oil (e.g., green color, 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 mineral oil, Suniso, Freol-S, MS (Synthetic oil), alkyl benzene, ester series, or PVE of ether series.