TOSHIBA AIR CONDITIONER (MULTI TYPE) Installation Manual

Indoor Unit

Model name:

1-Way Cassette type

• MMU-UP0031YHP-E
• MMU-UP0051YHP-E
• MMU-UP0071YHP-E
• MMU-UP0091YHP-E
• MMU-UP0121YHP-E

For commercial use

Scan QR code to access installation and owner's manual on website: https://www.toshiba-carrier.co.th/manuals/default.aspx

Manuals are available in multiple languages including English.

1 Accessory parts

The following parts are supplied with the indoor unit:

Separate sold parts

• The Ceiling panel and remote controller are sold separately. For the installation of these products, follow the Installation Manuals supplied with them.
• The wireless type remote controller is designed to be installed by attaching a wireless remote controller kit (sold separately) to the standard panel.

2 Selection of installation place

WARNING

• Install the air conditioner at 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 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 revolving fan or active electricity.

CAUTION

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

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:

• Place exposed to air with high salt content (seaside area), or place exposed to large quantities of sulfide gas (hot spring).
• A restaurant kitchen where a lot of oil is used or place near machines in a factory.
• Places where iron or other metal dust is present.
• Place where organic solvent is used nearby.
• Place where the discharged air blows directly into the window of the neighbour house.
• Place where noise of the outdoor unit is easily transmitted.
• Place with poor ventilation.
• 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.
• Place where any of high-frequency appliances and inverter-type fluorescent light is installed.
• When the wireless remote controller is used in a room equipped with an inverter-type fluorescent light or at a place exposed to direct sunlight, signals from the remote controller may not be received correctly.
• Place near a door or window exposed to humidity outside air.
• Place where special spray is used frequently.

Installation space

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

Selection of installation place

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

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

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

Advice

If installing a unit at such place, put insulating material (glass wool, etc.) additionally on all the positions of the indoor unit which come to contact with high-humidity atmosphere.

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.)

3 Installation

CAUTION

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

• Do not put a heavy article on the indoor unit.
• Carry in the indoor unit as it is packaged if possible. If carrying in the indoor unit unpacked by necessity, 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.
• Carry the package by two or more persons, and do not bundle it with plastic band at positions other than specified.
• To install vibration isolation material to hanging bolts. Confirm that it does not increase the unit vibration.

External dimensions

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.
• The dimensions of the ceiling opening and hanging bolt pitches are given in the outline drawing and the attached installation pattern.
• 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 and nuts for installing the indoor unit (these are not supplied).

Treatment of ceiling

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

It is important to reinforce ceiling foundation (frame) and to keep horizontal level of installed ceiling correctly in order to prevent vibration of ceiling board.

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

Installation of hanging bolt

Use M10 hanging bolts (4 pcs, locally procured). Matching to the existing structure, set pitch according to size in the unit external view.

New concrete slab

Install the bolts with insert brackets or anchor bolts.

Steel frame structure

Use existing angles or install new support angles.

Existing concrete slab

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

Using the installation pattern (accessory)

The installation pattern is provided inside the packaging cap.

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

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

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

Installation of ceiling opening and hanging bolt

• Attach a nut (M10 or W3/8: not supplied) and the Ø34 washer (supplied) to each hanging bolt.
• Insert a washer on both sides of the T groove of the hanging bracket of the indoor unit, and hang the indoor unit.
• Check that the four sides of the indoor unit are level using a level vial (levelness: 5 mm or less).
• Detach the installation gauge (accessory) from the installation pattern.
• Using the installation gauge, check and adjust the positional relation between the indoor unit and the ceiling opening.

Installation of ceiling panel (Sold separately)

Install the ceiling panel according to Installation Manual attached with it after piping / wiring work has completed.

Check that installation of indoor unit and ceiling opening part is correct, and then install it.

REQUIREMENT

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

Wireless type (Sold separately)

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

• Operate the remote controller, confirm that the indoor unit receives a signal surely, and then install it.
• Keep 1 m or more from the devices such as television, stereo, etc.
• To prevent a malfunction, select a place where is not influenced by a fluorescent light or direct sunlight.
• Two or more (Up to 6 units) indoor units with wireless type remote controller can be installed in the same room.

Installation of remote controller (Sold separately)

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

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

4 Drain piping

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 a dew dropping. Inappropriate piping work may result in water leakage in the room and wet of furniture.

Piping / Heat insulating material

Materials required for piping and heat insulating:

• Piping: Hard vinyl chloride pipe VP25 (Outer dia.: Ø32 mm)
• Heat insulator: Foam polyethylene (Thickness 10 mm or more)

Flexible hose

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

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

REQUIREMENT

Be sure to perform heat insulation of the drain pipes of the indoor unit. Never forget to perform heat insulation of the connecting part with the indoor unit. An incomplete heat insulation causes dew dropping. Set the drain pipe with downward slope (1/100 or more), and do not make swelling or trap on the piping. It may cause an abnormal sound.

• For length of the traversing drain pipe, restrict to 20 m or less. In case of a long pipe, provide support brackets with interval of 1.5 to 2 m in order to prevent waving.
• Set the collective piping as shown in the below figure.

• Be sure not to apply force to the connecting part of the drain pipe.
• The hard vinyl-chloride pipe cannot be directly connected to the drain pipe connecting port of the indoor unit. For connection with the drain pipe connecting port, be sure to use / fix the attached flexible hose with the hose band, otherwise a damage or water leak is caused on the drain pipe connecting port.

Connecting drain pipe

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

REQUIREMENT

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

Drain up

When a down-gradient cannot be secured for the drain pipe, drain-up piping is possible.

• The height of the drain pipe must be 500 mm or less from the bottom of the ceiling.
• Take the drain pipe out of the drain pipe joint with the indoor unit in 300 mm or less, and bend up the pipe vertically. Immediately after the pipe is bent up vertically, lay the pipe making a down-gradient.
• Set downward grading immediately after raising up vertically.

Check the draining

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

Using a pitcher or hose, pour water (1500 to 2000 cc) into the suction port before installation of the ceiling panel.

CAUTION

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

• After the electric work has finished, pour water during COOL mode operation.
• If the electric work has not yet finished, pull out the float switch connector (CN34: Red) from the electrical control box, and check draining by plugging the single phase 208 to 240V power to the terminal blocks (L) and (N). If doing so, the drain pump motor operates. (Never apply 208 to 240V to other terminals, otherwise a trouble of P.C. Board occurs.)
• Test water drain while checking the operation sound of the drain pump motor. (If the operation sound changes from continuous sound to intermittent sound, water is normally drained.)
• After the check, the drain pump motor runs, connecting the float switch connector.

5 Refrigerant piping

CAUTION

When the refrigerant pipe is long, provide support brackets at intervals of 2.5 m to 3 m to clamp the refrigerant pipe. Otherwise, abnormal sound may be generated.

Permissible piping length and height difference

They vary depending on the outdoor unit. For details, refer to the Installation Manual attached to the outdoor unit.

Pipe size

Connecting refrigerant piping

Flaring

• Cut the pipe with a pipe cutter. Remove burrs completely. Remaining burrs may cause gas leakage.
• Insert a flare nut into the pipe, and flare the pipe.
• As the flaring sizes of R32 or R410A differ from those of refrigerant R22, the flare tools newly manufactured for R32 or R410A are recommended. However, the conventional tools can be used by adjusting projection margin of the copper pipe.

CAUTION

• Do not scratch the inner surface of the flared part when removing burrs. Flare processing under the condition of scratches on the inner surface of flare processing part will cause refrigerant gas leak.
• Check that the flared part is not scratched, deformed, stepped, or flattened, and that there are no chips adhered or other problems, after flare processing.
• Do not apply refrigerating machine oil to the flare surface.

In case of flaring with the conventional flare tool, pull it out approx. 0.5 mm more than that for R22 to adjust to the specified flare size. The copper pipe gauge is useful for adjusting projection margin size.

The sealed gas was sealed at the atmospheric pressure so when the flare nut is removed, there will no "whooshing" sound: This is normal and is not indicative of trouble.

Use two wrenches to connect the indoor unit pipe.

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 gap.
• Cover the drain pipe seamlessly with a heat insulator locally procured so that it overlaps with the attached heat insulator of the drain connecting section.
• Wrap the attached heat insulator seamlessly from the surface of the indoor unit.

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

6 Electrical connection

WARNING

• Use the specified wires for wiring connection to the terminals. Securely fix them to prevent external forces applied to the terminals from affecting the terminals. Incomplete connection or fixation may cause a fire or other trouble.
• Connect earth wire. (grounding work) Incomplete earthing cause an electric shock.
• Do not connect earth wires to gas pipes, water pipes, lightning conductor or telephone earth wires.
• Appliance shall be installed in accordance with national wiring regulations. Capacity shortage of power circuit or incomplete installation may cause an electric shock or a fire.

CAUTION

• The wire size and wire length of the communication line differs depending on the outdoor unit series to be connected. If incorrect / incomplete wiring is carried out, it will cause an electrical fire or smoke.
• Install an earth leakage breaker that is not tripped by shock waves. If an earth leakage breaker is not installed, an electric shock may be caused.
• Use the cord clamps attached to the product. Do not damage or scratch the conductive core and inner insulator of power and control wires when peeling them.
• Use the power supply wire and control wires of specified thickness, type, and protective devices required.
• Do not connect 208 to 240V power to the terminal blocks (Uv (U1)), (Uv (U2)), (A), (B) for control wiring. (Otherwise, the system will fail.)
• Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe. The coating may melt resulting in an accident.
• Be careful of fan operation when the circuit breaker is turned on. When the leak detector is connected in combination with the R32 outdoor unit, if the refrigerant leak detection sensor detects the refrigerant leak, a fan automatically rotates even while an air conditioner stops. Be careful not to be injured by the fan.

REQUIREMENT

• For power supply wiring, strictly conform to the Local Regulation in each country. For wiring of power supply of the outdoor units, follow the Installation Manual of each outdoor unit.
• After connecting wires to the terminal blocks, provide a trap and fix wires with the cord clamp.
• Run the refrigerant piping line and communication line in the same line.
• Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.

Power supply wire and communication wires specifications

Power supply wire and communication wires are locally procured.

For the power supply specifications, follow to the table below. If capacity is little, it is dangerous because overheat or burnout may be caused.

For specifications of the power capacity of the outdoor unit and the power supply wires, refer to the Installation Manual attached to the outdoor unit.

Indoor unit power supply

• For the power supply of the indoor unit, prepare the 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.

Power supply

Power supply switch / circuit breaker or power supply wiring / fuse rating for indoor units should be selected by the accumulated total current values of the indoor units.

Control wiring, Central controller wiring

• 2-core with non-polarity wires are used for the Control wiring between indoor unit and outdoor unit and Central controller wiring.
• To prevent noise trouble, use 2-core shield wire.

Communication line

TU2C-Link models (U series) can be combined with TCC-Link models (other than U series). For details of communication type, refer to the following table.

* Even if the indoor units, the remote controllers, and the central control device are models other than U series, their system diagrams for the wiring specifications are the same as the system diagram above.

Follow the wiring specifications in the table below even when units other than U series are mixed in the indoor units and remote controllers to be connected.

• U (v, h, c) line means of control wiring.

• Uv line: Between indoor and outdoor units.
• Uh line: Central control line.
• Uc line: Between outdoor and outdoor units.

• Uv line and Uc line are independent from another refrigerant line. Total length of Uv and Uc lines (L3 + L4) in each refrigerant line is up to 1000 m.

REQUIREMENT

For connection of Uv line / Uc line or Uh line, wire each line using wires with the same type and size. If different wire types and size are mixed and used in a system, communication trouble is caused.

Control wiring between indoor units, and outdoor unit (L2, L3)

Central control line wiring (L1)

Control wiring between outdoor units (L4)

• The length of the communication line (L1 + L2 + L3) means the total length of the inter-unit wire length between indoor and outdoor units added with the central control system wire length.

REQUIREMENT

For connection of between indoor and outdoor units line / between outdoor and outdoor units line or central control line, wire each line using wires with the same type and size. If different wire types and size are mixed and used in a system, communication trouble is caused.

Wire connection

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

1. Remove the cover of the electrical control box by taking off the mounting screw and pushing the hooking section.
2. Connect the power supply wire 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 cord clamp attached to the electrical control box.
4. Mount the cover of the electrical control box without pinching wires.

Remote controller wiring

Be sure to stop the air conditioner before making settings.

Wiring diagram

• 2-core with non-polarity wire is used for the remote controller wiring and group remote controllers wiring.
• Remote controller wiring, remote controller inter-unit wiring Wire size: 0.5 mm² to 2.0 mm²

CAUTION

• The remote controller wire (Communication line) and AC 220V wires cannot be parallel to contact each other and cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise or other factor.
• If U series models (TU2C-Link) are combined with models other than U series (TCC-Link), the wiring specifications and maximum number of connectable indoor units will be changed. Pay attentions to their communication specifications when carrying out the installation, maintenance, or repair. For its details, refer to the "Communication line" in Electrical connection.

Max. number of connectable indoor units, and communication type

*: Other than U series

REQUIREMENT

After carrying out installation of additional indoor unit, relocation, or repairing, set the addresses again. For its detail, refer to the Installation Manual attached to the outdoor unit.

Wiring between indoor and outdoor units

NOTE

A wiring diagram below is an example for connection to SMMS-u series. For connecting to other outdoor unit series, refer to the Installation Manual attached to the outdoor unit to be connected.

Wiring example

Address setup

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

Wiring on the ceiling panel

According to the Installation Manual of the ceiling panel, connect the connector (20P: White) of the ceiling panel to the connector (CN510: White) on P.C. Board of the electrical control box.

7 Applicable controls

REQUIREMENT

When the air conditioner is used for the first time, it will take some moments after the power has been turned on before the remote controller becomes available for operations: This is normal and is not indicative of trouble.

• Concerning the automatic addresses (The automatic addresses are set up by performing operations on the outdoor interface circuit board.) While the automatic addresses are being set up, no remote controller operations can be performed. Setup takes up to 10 minutes (usually about 5 minutes).
• When the power is turned on after automatically address setup, It takes up to 10 minutes (usually about 3 minute) for the outdoor unit to start operating after the power has been turned on.
• Before the air conditioner was shipped from the factory, all units are set to [STANDARD] (factory default).
• If necessary, change the indoor unit settings. The settings are changed by operating the wired remote controller.
• The settings cannot be changed using only a wireless remote controller and simple remote controller by itself so install a wired remote controller separately as well.

Applicable controls setup (settings at the site)

Remote controller model name: RBC-ASCU11-E

Basic procedure

Be sure to stop the air conditioner before making settings.

CAUTION

Set only the CODE No. shown in the following table: Do NOT set any other CODE No. 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.

1. Push and hold menu button and [▽] setting button simultaneously for 10 seconds or more.
2. Each time [▽] [△] setting button is pushed, indoor unit numbers in the group control change cyclically. Select the indoor unit to change settings for. The fan of the selected indoor unit runs. The indoor unit can be confirmed for which to change settings.
3. Push OFF timer button to confirm the selected indoor unit.
4. Push the menu button to make CODE No. [**] flash. Change CODE No. [**] with [✔] [A] setting button.
5. Push the menu button to make Set data [****] flash. Change Set data [****] with [▽] [A] setting button.
6. Push OFF timer button. By doing so, the setup is completed.
7. When all the settings have been completed, push ON/OFF button to determine the settings.

Installing indoor unit on high ceiling

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

• Follow to the basic operation procedure (1→2→3→4→5→6).
• For the CODE No. in Procedure 4, specify [5d].
• Select the SET DATA for Procedure 5 from the "Height list of ceiling possible to be installed" table in this manual.

Remote controller-less setting

Change the high-ceiling setting with the DIP switch on the receiver section P.C. Board. For details, refer to the manual of the wireless remote controller kit. The settings can also be changed with the switch on the indoor microcomputer P.C. Board.

Change of lighting time of filter sign

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

• Follow the basic operation procedure (1→2→3→4→5→6).
• For the CODE No. in Procedure 3, specify [01].
• For the SET DATA in Procedure 4, select the SET DATA of filter sign lighting time from the following table.

To secure better effect of heating

When it is difficult to obtain satisfactory heating due to installation place of the indoor unit or structure of the room, the detection temperature of heating can be raised. Also use a circulator, etc. to circulate heat air near the ceiling.

• Follow the basic operation procedure (1→2→3→4→5→6).
• For the CODE No. in Procedure 3, specify [06].
• For the SET DATA in Procedure 4, select the SET DATA of shift value of detection temperature to be set up from the table below.

Group control

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

• For wiring procedure and wiring method of the individual line (Identical refrigerant line) system, refer to "Electric work" in this Manual.
• Wiring between indoor units in a group is performed in the following procedure. Connect the indoor units by connecting the remote controller inter-unit wires from the remote controller terminal blocks (A/B) of the indoor unit connected with a remote controller to the remote controller terminal blocks (A/B) of the other indoor unit. (Non-polarity)
• For address setup, refer to the Installation Manual attached to the outdoor unit.

Remote controller sensor

The temperature sensor of the indoor unit senses room temperature usually. Set the remote controller sensor to sense the temperature around the remote controller. Select items following the basic operation procedure (1→2→3→4→5→6). Specify [32] for the CODE No. in Procedure 3. Select the following data for the SET DATA in Procedure 4.

When flashes, the remote controller sensor is defective. Select the SET DATA [0000] (not used) or replace the remote controller.

8 Test run

Before test run

• Before turning on the circuit breaker, carry out the following procedure.

1. By using insulation tester (500VΜΩ), check that resistance of 1MΩ or more exists between the terminal block L to N and the earth (grounding). If resistance of less than 1MΩ is detected, do not run the unit.
2. Check the valve of the outdoor unit being opened fully.

• To protect the compressor at activation time, leave power-ON for 12 hours or more for operating.
• Before starting a test run, be sure to set addresses following the Installation Manual supplied with the outdoor unit.

Requirements for turning thermostat OFF

Cooling operation

• When the outdoor/suction air temperature is lower than or equal to 19°C.
• When the outdoor/suction air temperature is lower than or equal to 3°C above the set temperature.

Heating operation

• When the outdoor/suction air temperature is lower than or equal to -10°C
• When the outdoor/suction air temperature is higher than or equal to 15°C.
• When the outdoor/suction air temperature is higher than or equal to 3°C above the set temperature.

Execute a test run

• When a fan operation is to be performed for an individual indoor unit, turn off the power, short circuit CN72 on the circuit board, and then turn the power back on. (Set the operation mode to "fan" to operate the unit.) When the test run has been performed using this method, be sure to release the short circuit of CN72 after the test run is completed.
• Operate the unit with the remote controller as usual. For the procedure of the operation, refer to the Owner's Manual attached to the outdoor unit.
• A forced test run can be executed in the following procedure even if the operation stops by thermostat-OFF.

In order to prevent a serial operation, the forced test run is released after 60 minutes have passed and returns to the usual operation.

CAUTION

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

9 Maintenance

CAUTION

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

Cleaning of air filter

• If is displayed on the wired remote controller, maintain the air filter. Clogging of the air filter reduce cooling / heating performance.

Cleaning of panel and air filter

Preparation:

1. Turn off the air conditioner by the remote controller.
2. Open the air inlet grille. Slide the hook of the air inlet grille outward, and open the air inlet grille slowly while holding it.

2. Close the air inlet grille. Close the air inlet grille, slide the hook inward, and fix the air inlet grille securely.

Use a vacuum cleaner to remove dust from the filters or wash them with water.

• After rinsing the air filters with water, dry them in the shade.
• Set the air filter into the air conditioner.

Clean the panel and air filter with water:

• Wipe down the panel and air filter with a sponge or towel moistened with a kitchen detergent.
• Carefully rinse the panel and air filter to wash out the detergent.
• After rinsing the panel and air filter with water, dry it in the shade.

Cleaning of air filters

If the air filters are not cleaned, it not only reduce the cooling a performance of air conditioner but causes a failure in the air conditioner such as water falling in drops.

Preparation:

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

• "FILTER" disappears.
• Push the filter reset button. (indication will be turn off.)

CAUTION

• Do not start the air conditioner while leaving the panel and air filter removed.

REQUIREMENT

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

10 Troubleshooting

If a problem occurs with the air conditioner, the OFF timer indicator alternately shows the check code and the indoor UNIT No. in which the problem occurred.

Troubleshooting history and confirmation

You can check the troubleshooting history with the following procedure if a problem occurs with the air conditioner. (The troubleshooting history records up to 4 incidents.) You can check it during operation or when operation is stopped. If you check the troubleshooting history during OFF timer operation, the OFF timer will be canceled.

1. Push the OFF timer button for over 10 seconds and the indicators appear as an image indicating the troubleshooting history mode has been entered. If [ Service check] is displayed, the mode enters in the troubleshooting history mode.
2. [01: Order of troubleshooting history] appears in the temperature indicator. The OFF timer indicator alternately shows the [check code] and the [indoor UNIT No.] in which the problem occurred.
3. Each time the setting button is pushed, the recorded troubleshooting history is displayed in sequence. The troubleshooting history appears in order from [01] (newest) to [04] (oldest).

CAUTION

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

• After you have finished checking, push the ON/OFF button to return to the regular mode.
• If the air conditioner is operating, it remains operated even after the ON/OFF button has been pushed. To stop its operation, push the ON/OFF button again.

Check method

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

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

• In case of check from indoor remote controller: See "Wired remote controller display" in the list.
• In case of check from outdoor unit: See "Outdoor unit 7-segment display" in the list.
• In case of check from indoor unit with a wireless remote controller: See "Sensor block display of receiving unit" in the list.

• For details about check codes determined with an Interface P.C. Board or an Inverter P.C. Board, refer to the Installation Manual of the outdoor unit.

11 Specifications

* Under 70 dBA

12 Notice code

• Notice code is a function only in TC2U-Link communication.
• When the outdoor or indoor unit detects its conditions requiring caution or maintenance, this function notices you to check your units with the spanner mark (Notice code mark) on the wired remote controller or central controller display.
• Even while the notice code mark is displayed, the air conditioner can operate normally.
• A maximum of 5 notice codes can be issued simultaneously in one system (line).

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 [▽] [A] 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.

Notice code list

Declaration of Conformity

Manufacturer: Toshiba Carrier (Thailand) Co., Ltd

TCF holder: TOSHIBA CARRIER EUROPE S.A.S

Hereby declares that the machinery described below:

Generic Denomination: Air Conditioner

Model / type: MMU-UP0031YHP-E, MMU-UP0051YHP-E, MMU-UP0071YHP-E, MMU-UP0091YHP-E, MMU-UP0121YHP-E

Commercial name: Super Modular Multi System Air Conditioner, Super Heat Recovery Multi System Air Conditioner, Mini-Super Modular Multi System Air Conditioner (MiNi-SMMS series)

Complies with the provisions of the Machinery Directive (Directive 2006/42/EC) and the regulations transposing into national law

Name: Masaru Takeyama

Position: GM, Quality Assurance Dept.

Date: 2 November, 2021

Place Issued: Thailand

NOTE: This declaration becomes invalid if technical or operational modifications are introduced without the manufacturer's consent.

Declaration of Conformity

Manufacturer: Toshiba Carrier (Thailand) Co., Ltd

TCF holder: TOSHIBA CARRIER UK LTD.

Hereby declares that the machinery described below:

Generic Denomination: Air Conditioner

Model / type: MMU-UP0031YHP-E, MMU-UP0051YHP-E, MMU-UP0071YHP-E, MMU-UP0091YHP-E, MMU-UP0121YHP-E

Commercial name: Super Modular Multi System Air Conditioner, Super Heat Recovery Multi System Air Conditioner, Mini-Super Modular Multi System Air Conditioner (MiNi-SMMS series)

Complies with the provisions of the Supply of Machinery (Safety) Regulations 2008

Name: Masaru Takeyama

Position: GM, Quality Assurance Dept.

Date: 2 November, 2021

Place Issued: Thailand

NOTE: This declaration becomes invalid if technical or operational modifications are introduced without the manufacturer's consent.

Warnings on Refrigerant Leakage

Check of Concentration Limit

The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out, its concentration will not exceed a set limit.

Refrigerant R32

The refrigerant R32 which is used in the air conditioner is mildly flammable. In Europe and areas where IEC standards apply, EN/IEC 60335-2-40 is the applicable standard. The refrigerant R 32 does not have the toxicity of ammonia, and is not restricted by laws to be imposed which protect the ozone layer. If this appliance is connected with the outdoor unit containing R32 refrigerant, refer to the Installation and Owner's Manual attached to the outdoor unit.

Refrigerant R410A

The refrigerant R410A which is used in the air conditioner is safe, without the toxicity or combustibility of ammonia, and is not restricted by laws to be imposed which protect the ozone layer. However, since it contains more than air, it poses the risk of suffocation if its concentration should rise excessively. Suffocation from leakage of R410A is almost non existent. With the recent increase in the number of high concentration buildings, however, the installation of multi air conditioner systems is on the increase because of the need for effective use of space, individual control, energy conservation by curtailing heat and carrying power etc.

Most importantly, the multi air conditioner system is able to hold a large amount of refrigerant compared with conventional individual air conditioners. If a single unit of the multi conditioner system is to be installed in a small room, select a suitable model and installation procedure so that if the refrigerant accidentally leaks out, its concentration does not reach the limit (and in the event of an emergency, measures can be made before injury can occur).

In a room where the concentration may exceed the limit imposed by the local regulation, create an opening with adjacent rooms, or install mechanical ventilation or isolation, combined with a gas leak detection device, which complies with the local regulatory requirements.

The concentration calculation method is as given below. Please note the concentration limit between R32 and R410A refrigerant differs.

Total amount of refrigerant (kg) / Min. volume of the indoor unit installed room (m³) ≤ Concentration limit (kg/m³)

Refrigerant Concentration Limit shall be in accordance with local regulations.

NOTE 2

The standards for minimum room volume are as follows.

1. No partition (shaded portion)

2. When there is an effective opening with the adjacent room for ventilation of leaking refrigerant gas (opening without a door, or an opening 0.15% or larger than the respective floor spaces at the top or bottom of the door).

3. If an indoor unit is installed in each partitioned room and the refrigerant piping is interconnected, the smallest room of course becomes the object. But when a mechanical ventilation is installed interlocked with a gas leakage detector in the smallest room where the density limit is exceeded, the volume of the next smallest room becomes the object.

▼ NOTE 1

If there are 2 or more refrigerating systems in a single refrigerating device, the amounts of refrigerant should be as charged in each independent device.

For the amount of charge in this example: The possible amount of leaked refrigerant gas in rooms A, B and C is 10 kg. The possible amount of leaked refrigerant gas in rooms D, E and F is 15 kg.

▼ NOTE 3

System compliance has been completed to IEC 60335-2-40 Ed6. If EN378 compliance is required please refer separately to EN378 for guidance.

13 Appendix

Work instructions

The existing R22 and R410A piping can be reused for inverter R32 product installations.

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.

1. When a scratch or dent is heavy, be sure to use new pipes for the refrigerant piping works.
2. When the existing pipe thickness is thinner than the specified "Pipe diameter and thickness," be sure to use new pipes for the refrigerant piping works.

The operating pressure of refrigerant is high. If there is a scratch or dent on the pipe or a thinner pipe is used, the pressure strength may be inadequate, which may cause the pipe to break in the worst case.

3. 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.
4. When refrigerant cannot be recovered using a refrigerant recovery unit.
5. When a commercially available dryer is attached to the existing pipes.
6. When the existing air conditioner is removed after refrigerant has been recovered.

Check if the oil is judged to be clearly different from normal oil.

• The refrigerator oil is copper rust green in color: There is the possibility that moisture has mixed with the oil and rust has been generated inside the pipe.
• There is discolored oil, a large quantity of residue, or a bad smell.
• A large quantity of shiny metal dust or other wear residue can be seen in the refrigerant oil.

The winding-insulation of the compressor may deteriorate.

NOTE The above descriptions are results have been confirmed by our company and represent our views on our air conditioners, but do not guarantee the use of the existing pipes of air conditioners that have adopted R32, R410A in other companies.

Curing of pipes

When removing and opening the indoor or outdoor unit for a long time, cure the pipes as follows:

• Otherwise rust may be generated when moisture or foreign matter due to condensation enters the pipes.
• The rust cannot be removed by cleaning, and new pipes are necessary.

Are there scratches or dents on the existing pipes?

NO

Is it possible to operate the existing air conditioner?

YES

After the existing air conditioner is operated in cooling mode for approx. 30 minutes or longer, recover the refrigerant.

For cleaning the pipes and recovering oil

* Refrigerant recovery: Pump down method

Remove the existing air conditioner from the piping and carry out flushing (nitrogen pressure 0.5 MPa) to remove any remains inside of the pipe.

Note: In case of twin pipes, also be sure to flush the branching pipe.

Was largely discolored oil or a large quantity of remains discharged?

(When the oil deteriorates, the color of the oil changes to a muddy or black color.)

NO

Connect the indoor / outdoor units to the existing pipe.

• Use a flare nut attached to the main unit for the indoor / outdoor units. (Do not use the flare nut of the existing pipe.)
• Re-machine the flare machining size to size for R32, R410A.
• (Airtight test), Vacuum dry, Refrigerant charge, Gas leak check
• Test run

YES

Existing pipes: Cannot be used. Use new pipes.

NO

Nitrogen gas pressure 0.5 MPa

(If there is discharge of remains, it is judged that a large quantity of remains are present.)

YES

Clean the pipes or use new pipes.

Piping necessary to change the flare nut / machining size due to pipe compression

1) Flare nut width: H (mm)

2) Flare machining size: A (mm)

Becomes a little larger for R32, R410A

Do not apply refrigerator oil to the flare surface.