TOSHIBA MMU-UP0071MHP-E (01) PDF DOCUMENT

The following accessory parts are supplied with your TOSHIBA MMU-UP0071MHP-E indoor unit:

Note: The Ceiling panel and remote controller are sold separately.

Please observe the following safety warnings and cautions during installation:

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 is operating, as you may contact a 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 of the outdoor unit.

Upon approval, install the TOSHIBA MMU-UP0071MHP-E in a place that satisfies the following conditions:

• A place where the unit can be installed horizontally.

• A place where sufficient servicing space can be ensured for safety maintenance and checks.

• A place where drained water will not cause any problems.

Avoid installing in the following places:

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

• Places where iron or other metal dust is present. If 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.

• Close to a machine generating high frequency.

• For the outdoor unit, avoid places where discharged air blows directly into a neighbor’s window or where noise is easily transmitted.

• A place with poor ventilation.

• Do not use for special purposes like preserving food, precision instruments, or art objects, or for breeding animals or growing plants, as this may degrade quality.

• A place where high-frequency appliances (inverter devices, private power generators, medical equipment, etc.) or inverter-type fluorescent light is installed, as this may cause malfunctions.

• If using a wireless remote, avoid rooms with inverter-type fluorescent lights or places exposed to direct sunlight, as signals may not be received correctly.

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

• A place where special spray is used frequently.

Installation Space Requirements (in mm):

• Clearance from top plate to ceiling surface: 15 mm or more

• Clearance on the electrical control box side: 1000 mm or more for service access (A service check opening panel of 450 x 450 mm or more is required)

• Clearance on the side opposite the electrical box: 1000 mm or more

• Clearance for height adjustment access: A check port of 450 x 450 mm is needed

• Vertical clearance below the unit: 271 mm or more

High-Humidity Installation:

In high-humidity conditions (dew point temperature 23°C or more), such as inside a ceiling with a slated roof, a kitchen, or where the ceiling space is used as a fresh air take-in path, dew may condense. If the humidity inside the ceiling is expected to be higher than 80%, attach a heat insulator (10 mm or more thick) to the side (top) surface of the indoor unit.

Ceiling Height:

The installable ceiling height depends on the unit type. If the ceiling height exceeds the standard distance, the warm air may not reach the floor effectively, requiring a change in the high ceiling setting.

Installable Ceiling Height Table:

High Ceiling Setting Options:

Note: When using high ceiling settings with 4-way blowing, a draft may be more noticeable due to the drop in discharge temperature.

Handling Requirements:

• Do not put any heavy articles on the indoor unit, even when it is packaged.

• Carry the indoor unit in its packaging if possible. If you must carry it unpacked, use a buffering cloth to prevent damage.

• To move the unit, hold the hooking metals at the four positions only. Do not apply force to other parts like the refrigerant pipe, drain pan, or foamed parts.

• Carry the package with two or more people. Do not bundle it with a plastic band at positions other than specified.

Installation Steps:

1. Open Ceiling and Install Hanging Bolts: After determining the location, open the ceiling. The ceiling opening dimensions should be 580 to 594 mm. Install four M10 or W3/8 hanging bolts (locally procured). Use the provided installation pattern to position the opening and bolts correctly.

2. Hang the Indoor Unit:

• Remove the tape that holds the fan and bell mouth before installation to avoid damaging the fan motor.

• Attach a nut and the accessory washer to each hanging bolt.

• Insert a washer on both sides of the T-groove of the unit’s hanging bracket and hang the indoor unit on the bolts.

• For a grid ceiling, you may need to incline the unit to mount it, starting from the electrical control box side.

3. Level and Position the Unit:

• Use a level gauge to ensure all four sides of the unit are level (levelness: 5 mm or less).

• Use the accessory installation gauge to check and adjust the position:

– The gap between the indoor unit and the ceiling opening should be 2.5 – 9.5 mm on all four sides.

– The hanging-up height between the bottom of the unit and the ceiling board should be 23 – 28 mm at all four corners.

• Use the accessory eccentric washer if needed, installing it with the “UP” marking facing up.

• Secure the unit with nuts. Place a washer and nut just under the hanging bracket for safety to prevent the bolt from falling off.

Proper drain piping is crucial to prevent water leakage. Follow these steps:

Materials Required:

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

• Heat Insulator: Foam polyethylene, thickness 10 mm or more

Installation Steps:

1. Use the Flexible Hose: Connect the attached flexible hose to the drain pipe connecting port on the indoor unit to adjust for any center discrepancy. Do not stretch or deform the hose excessively. Use it on a horizontal level and secure the soft end with the attached hose band. Do not use adhesive on the clear drain socket, as it can cause damage.

2. Connect the Drain Pipe:

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

• Connect the main drain pipe (locally procured) to this hard socket using an adhesive for vinyl chloride.

3. Ensure Proper Slope and Support:

• The drain pipe must have a downward slope of 1/100 (1 cm drop for every 100 cm length) or more.

• Do not create any swelling or traps in the piping, as this can cause abnormal sounds.

• The total length of the traversing drain pipe should be 20 m or less. For long pipes, provide support brackets every 1.5 to 2 m to prevent waving.

4. Drain-Up Piping (If Necessary): If a downward gradient cannot be secured, you can use drain-up piping. The height of the drain pipe must be 850 mm or less from the bottom of the ceiling. The vertical rise should be within 300 mm of the indoor unit connection.

5. Heat Insulation:

• Perform heat insulation on all drain pipes, including the connecting part with the indoor unit, to prevent condensation.

• Cover the flexible hose and hose band with the attached heat insulator, ensuring there are no gaps up to the bottom of the indoor unit.

• Cover the main drain pipe seamlessly with a locally procured heat insulator, overlapping it with the attached insulator.

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

Before installing the ceiling panel, check that water is drained properly and does not leak from any connections.

1. Using a pitcher or hose, pour 1500 to 2000 cc of water into the unit. Pour the water gradually between the heat exchanger and the drain pan so it does not spread on the drain pump motor.

2. Check for proper drainage. The drain pump motor will operate. If the operation sound changes from continuous to intermittent, the water is draining normally.

3. You can perform this check in two ways:

• After electrical work is finished: Pour water during COOL mode operation.

• Before electrical work is finished: Pull out the float switch connector (CN34: Red) from the electrical control box. Connect a single-phase 220V-240V power source to the terminal blocks (L) and (N) to operate the drain pump. Never apply power to terminals Uv(U1), Uv(U2), A, or B. After the check, reconnect the float switch connector to its original position.

Follow these procedures for a leak-free refrigerant system. Use flare nuts included with the unit, as different nuts can cause leaks.

1. Pipe Flaring:

• Cut the pipe with a pipe cutter and completely remove any burrs. Scratches on the inner surface of the flared part can cause gas leaks.

• Insert a flare nut onto the pipe and flare the end. The dimensions for R32/R410A are different from R22 refrigerant.

• Use the following dimensions for flaring:

Projection Margin in Flaring: B (Unit: mm)

Flaring Diameter Size: A (Unit: mm)

2. Pipe Connection:

• Align the centers of the pipes and tighten the flare nuts by hand, then use two wrenches (a standard wrench and a torque wrench) to tighten them to the specified torque. Incorrect tightening can cause gas leaks and damage the refrigeration cycle.

Tightening Torque:

3. Evacuation and Charging:

• After connecting, evacuate the air from the connecting pipes using a vacuum pump. Do not use the refrigerant in the outdoor unit for this purpose.

• Add the required amount of R32 or R410A refrigerant as specified in the outdoor unit’s installation manual.

• Perform an airtight test and check for gas leaks at all connections.

4. Heat Insulation:

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

• Use the attached heat insulation material to securely cover the pipe connecting section of the indoor unit, ensuring there are no gaps. The seam of the insulator should face upward.

WARNING: Incomplete or incorrect wiring can cause electric shock or fire. All wiring must comply with national regulations.

• General Requirements:

• Use the specified wires and connect them securely to the terminals.

• An earth wire (grounding) must be connected. Do not connect it to gas pipes, water pipes, lightning conductors, or telephone earth wires.

• Install an earth leakage breaker.

• Use the provided cord clamps to secure wires and prevent strain on the terminals.

• Ensure wiring does not contact high-temperature parts of the pipes.

• Indoor Unit Power Supply:

• The indoor unit requires its own exclusive power supply, separate from the outdoor unit.

• Power supply wire specification: Cable 3-core 2.5 mm², in conformity with Design 60245 IEC 57. The required power supply is 220-240V~, 50 Hz or 208-230V~, 60 Hz.

• Wire Connection Procedure:

1. Loosen the two screws and slide to remove the cover of the electrical control box.

2. Connect the power supply wire, control wiring, and remote controller wire to the correct terminals (L, N for power; U1, U2 for control; A, B for remote controller).

3. Tighten the terminal screws securely.

4. Fix the wires with the cord clamp. Choose the correct clamping position (Side C or Side D) based on the wire type.

5. Mount the cover of the electrical control box, ensuring no wires are pinched.

Before the Test Run:

• Using a 500V MΩ insulation tester, check that the resistance between terminal block L to N and the earth (grounding) is 1 MΩ or more. Do not run the unit if it is less.

• Check that the outdoor unit’s valves are fully open.

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

Test Run with a Wired Remote Controller (Model RBC-ASCU11-E):

1. Stop the air conditioner if it is running.

2. Press and hold the OFF timer button and the ▲ setting button simultaneously for 10 seconds or more. [TEST] will be displayed.

3. Push the ON/OFF button to start the test run.

4. Push the menu button to select the operation mode. Select [Cool] or [Heat] using the ▼/▲ setting buttons, then push the menu button three more times to confirm.

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

Test Run with a Wireless Remote Controller:

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

2. Push the ON/OFF button, select [Cool] or [Heat] mode, and set the fan to [HIGH].

3. For a cooling test run:

• Set the temperature to 17°C.

• After hearing a “beep”, immediately set it to 18°C.

• After another “beep”, immediately set it back to 17°C.

4. For a heating test run:

• Set the temperature to 30°C.

• After hearing a “beep”, immediately set it to 29°C.

• After another “beep”, immediately set it back to 30°C.

5. Repeat the temperature change sequence (17°C → 18°C → 17°C… for cooling or 30°C → 29°C → 30°C… for heating). After a few repetitions, the indicators on the wireless receiver will flash, and the test run will start.

6. To end the test run, push the ON/OFF button.

Follow these steps for daily maintenance of the air filter:

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

2. Open the Air Intake Grille:

• Loosen the fixing screw.

• Slide the fixing bracket toward the inside.

• Hold 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 it.

4. Clean the Filter: Clean the filter with a vacuum cleaner. If the dirt is heavy, wash it with tepid water and a neutral detergent. After washing, dry the filter completely in a shaded place.

5. Mount the Air Filter: Re-install the clean, dry filter into the grille.

6. Close the Air Intake Grille:

• Check that the fall-preventive strap is attached to the panel.

• In the reverse process of opening, firmly attach the hook, then secure the fixing bracket and fixing screw.

7. Turn On Power: Set the circuit breaker back to ON.

You can change various settings using the wired remote controller (RBC-ASCU11-E). Always stop the air conditioner before making settings.

Basic Procedure to Enter Setting Mode:

1. Push and hold the menu button and ✔ (Enter) button simultaneously for 10 seconds or more. The display will start flashing.

2. Each time the ▼ or ▲ setting button is pushed, the indoor unit number changes. Select the indoor unit you wish to change settings for. The fan of the selected 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. using the ▼/▲ buttons.

5. Push the menu button to make the Set Data flash. Change the Set Data using the ▼/▲ buttons.

6. Push the OFF timer button to complete the setup for that code.

7. To change other settings for the same unit, repeat from step 4. When all settings are complete, push the ON/OFF button to save and exit.

Common Settings:

• High Ceiling Setting: To adjust fan speed for high ceilings.

• Code No.: 5d

• Set Data: 0000 (Standard), 0001 (High ceiling 1), 0003 (High ceiling 3)

• Filter Sign Lighting Time: To change the filter cleaning notification interval.

• Code No.: 01

• Set Data: 0000 (None), 0001 (150 H), 0002 (2500 H – Factory default), 0003 (5000 H), 0004 (10000 H)

• Heating Temperature Shift: To secure better heating performance.

• Code No.: 06

• Set Data: 0000 (No shift) up to 0006 (+6 °C). Factory default is 0002 (+2 °C).

• Swing Type: To change louver swing pattern.

• Code No.: F0

• Set Data: 0001 (Standard), 0002 (Dual swing), 0003 (Cycle swing)

• Louver Lock (No Swing): To lock individual louvers in a fixed position.

• Code No.: F1 (Louver 1), F2 (Louver 2), F3 (Louver 3), or F4 (Louver 4)

• Set Data: 0001 to 0005 for different angles.

If a problem occurs, the OFF timer indicator on the wired remote controller will alternately show a check code and the indoor unit number where the problem occurred. You can check the history of the last 4 incidents.

1. Push the OFF timer button for over 10 seconds. The display will enter the troubleshooting history mode.

2. The temperature indicator will show the history order number (from [01] newest to [04] oldest). The OFF timer indicator will alternately show the [check code] and the [indoor Unit No.] for that incident.

3. Each time the setting button (▲ or ▼) is pushed, the next recorded troubleshooting incident is displayed in sequence.

4. 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 will delete the entire troubleshooting history of the indoor unit.

The following table lists the check codes, their meaning, and the likely device at fault. On the wireless remote controller receiver, the code is indicated by a pattern of flashing LEDs (Operation, Timer, Ready).

A notice code (indicated by a spanner mark on the wired remote) signals a condition requiring caution or maintenance. The air conditioner can still operate normally. A maximum of 5 notice codes can be issued simultaneously.

How to Check Notice Codes:

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

2. The indoor unit number is displayed. Select the unit with the ▼/▲ buttons and push the OFF timer button to confirm.

3. The history number and the Notice code No. are displayed. You can switch through the history with the ▼/▲ buttons.

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

Notice Code List:

Existing R22 and R410A piping can be reused for R32 product installations if specific conditions are met.

Basic Conditions for Reuse:

• Dry: There is no moisture inside the pipes.

• Clean: There is no dust inside the pipes.

• Tight: There are no refrigerant leaks.

Restrictions (When Pipes Should NOT Be Reused As-Is):

• When a scratch or dent is heavy, use new pipes.

• When the pipe thickness is thinner than specified for R32/R410A (e.g., less than 0.8 mm for ø6.4-ø12.7 pipes), use new pipes.

• When the outdoor unit was left disconnected, or gas leaked without repair (risk of moisture ingress).

• When refrigerant cannot be recovered properly (risk of dirty oil/moisture remaining).

• When a commercially available dryer is attached to the pipes (risk of copper rust).

• When the oil from the old system is clearly different from normal oil (e.g., green color, contains residue, bad smell).

• When the previous compressor failed and was replaced.

• If the existing refrigerator oil is not a compatible type (Mineral oil, Suniso, Freol-S, MS, HAB, ester series, PVE only of ether series).

Procedure for Reusing Pipes:

1. If possible, operate the existing air conditioner in cooling mode for approx. 30 minutes.

2. Recover the refrigerant using the pump-down method.

3. Remove the existing air conditioner and flush the piping with nitrogen gas (pressure 0.5 MPa) to remove any contaminants.

4. If a large quantity of discolored oil or remains is discharged, the pipes must be thoroughly cleaned or replaced with new pipes.

5. Connect the new indoor/outdoor units to the existing pipe. Use the new flare nuts supplied with the unit.

6. Re-machine the flare ends to the correct size for R32/R410A.

7. Perform an airtight test, vacuum dry, charge with new refrigerant, and check for gas leaks.