TOSHIBA MMK-UP0271HP-E (01) PDF DOCUMENT

The following accessories are supplied with the TOSHIBA MMK-UP0271HP-E indoor unit:

When selecting an installation location for your TOSHIBA MMK-UP0271HP-E, ensure the following conditions are met upon customer approval:

• The unit can be installed horizontally.

• There is sufficient servicing space for safety maintenance and checks.

• The location for drained water will not cause any problems.

Select a location where cool or warm air will circulate evenly. Avoid installing the TOSHIBA MMK-UP0271HP-E in the following kinds of locations:

• Saline area (coastal area).

• Locations with acidic or alkaline atmospheres, such as areas with hot springs or factories with chemicals, which can cause corrosion.

• Locations with mist of cutting oil or other machine oils, which can cause corrosion, damage plastic parts, or generate mists from a blocked heat exchanger.

• Places where iron or other metal dust is present, as it may spontaneously combust if it collects inside the air conditioner.

• Locations where vapors from food oils are formed (e.g., kitchens), which can deteriorate performance and damage plastic parts.

• Locations near obstructions like ventilation openings or lighting fixtures that disrupt airflow.

• Locations where an in-house power generator is used, which can cause fluctuations in power line frequency and voltage.

• On moving conveyances such as truck cranes or ships.

• For special applications like storing food, plants, precision instruments, or art works, as the quality may be degraded.

• Locations where high frequencies are generated (by inverter equipment, medical equipment, etc.), which can cause malfunctioning or noise.

• Locations where there is anything under the unit that could be damaged by wetness from potential condensation drips.

• For wireless systems, rooms with inverter-type fluorescent lighting or locations exposed to direct sunlight, which can interfere with the remote controller signal.

• Locations where organic solvents are being used.

• Locations near doors or windows where the unit may contact high-temperature, high-humidity outdoor air, which can cause condensation.

• Locations where special sprays are used frequently.

The TOSHIBA MMK-UP0271HP-E indoor unit must be installed at a height of at least 2.5 meters. Additionally, it must be avoided to put anything on top of the indoor unit.

Please adhere to the following clearance requirements:

• Keep 50 mm or more for clearance between the top plate of the indoor unit and the ceiling surface for installation and service work.

• Provide a space of 191 mm or more on the left side and 170 mm or more on the right side for service clearance for the cross flow fan.

Choose an installation place that:

• Provides the spaces around the indoor unit as shown in the installation diagram.

• Has no obstacles near the air inlet and outlet.

• Allows for easy installation of the piping to the outdoor unit.

• Allows the front panel to be opened.

To install the batteries in the wireless remote controller for your TOSHIBA MMK-UP0271HP-E, follow these steps:

1. Remove the battery cover.

2. Insert 2 new batteries (R03 [AAA] type), following the (+) and (-) positions indicated inside the compartment.

For proper operation of the TOSHIBA MMK-UP0271HP-E, follow these guidelines for placing the wireless remote controller:

• Choose a location where there are no obstacles, such as a curtain, that may block the signal from the indoor unit.

• Do not install the remote controller in a place exposed to direct sunlight or close to a heating source like a stove.

• Keep the remote controller at least 1 meter away from the nearest TV set or stereo equipment to prevent image disturbances or noise interference.

• Avoid directing sunlight to the indoor unit’s wireless receiver.

• The microprocessor in the indoor unit should not be too close to RF noise sources.

The reception range is approximately 7 meters. From a top view, the signal is effective within a 45-degree angle to the left and right of the unit’s center. From a side view, the signal is effective within a 60-degree cone.

Cutting a hole for rear piping:

1. Decide the hole position for piping at 110 mm from the arrow mark (⇨) on the installation plate.

2. Drill a hole with a diameter of 80 mm at a slight downward slant toward the outdoor side.

NOTE: When drilling a wall that contains a metal lath, wire lath, or metal plate, use a pipe hole brim ring (sold separately).

Mounting the installation plate directly on the wall:

1. Securely fit the installation plate onto the wall by screwing it in the upper and lower parts to hook up the indoor unit.

2. To mount the plate on a concrete wall with anchor bolts, use the anchor bolt holes as illustrated in the diagram.

3. Install the installation plate horizontally in the wall.

CAUTION: When installing the plate with a mounting screw, do not use the anchor bolt hole, as this may cause the unit to fall. Failure to firmly install the unit may result in personal injury and property damage.

NOTE: Secure the four corners and lower parts of the installation plate with 6 mounting screws to install it.

• For block, brick, concrete, or similar walls, make 5 mm diameter holes and insert clip anchors for the mounting screws.

1. Die-cutting front panel slit:

For left or right connection, cut out the slit on the left or right side of the front panel. For bottom left or right connection, cut out the slit on the bottom left or right side of the front panel. Use a pair of nippers for this.

2. Changing drain hose:

For leftward, bottom-leftward, and rear-leftward piping connections, it is necessary to change the drain hose and drain cap.

How to remove the drain hose:

• Remove the screw securing the drain hose and then pull out the drain hose.

• Be careful of any sharp edges of the steel plate, which can cause injuries.

How to install the drain hose:

• Insert the drain hose firmly until the connection part contacts the heat insulator, and then secure it with the original screw.

How to remove the drains cap:

Clip the drain cap with needle-nose pliers and pull it out.

How to fix the drains cap:

1. Insert a hexagonal wrench (dia. 4 mm) into the center head of the cap.

2. Firmly insert the drain cap, ensuring there is no gap. Do not apply lubricating oil (refrigerant machine oil) when inserting the drain cap, as this can cause deterioration and leakage.

CAUTION: Firmly insert the drain hose and drain cap; otherwise, water may leak.

How to remove the drain hose:

1. Remove the front panel.

2. Remove the screws of the drain hose.

3. Pull out the drain hose.

How to fix the drain hose:

1. Put the drain hose in place.

2. Screw the drain hose to the indoor unit.

3. Install the front panel.

For right or left piping:

After scribing the slits on the front panel with a knife or a marking-off pin, cut them with a pair of nippers or an equivalent tool.

For the TOSHIBA MMK-UP0271HP-E, it is crucial to insulate the pipes correctly to prevent condensation and water leaks. Follow these instructions:

• Use the provided heat insulator to insulate the indoor unit connection completely, ensuring there are no gaps. The slit part of the heat insulator should face upward.

• Securely apply insulation all the way up to the pipe connecting section of the indoor unit so there is no exposed area. Any pipe exposed to the outside can cause a water leak.

• Bind the auxiliary pipes (two) and the power supply and control wiring together with facing tape. For leftward and rear-leftward piping, bind only the two auxiliary pipes with facing tape.

• Carefully arrange pipes so that no pipe sticks out from the rear plate of the indoor unit.

• Ensure both connecting pipes are insulated to prevent dew, which can cause a machine trouble. Use polyethylene foam as the insulating material.

• When bending a pipe, do so carefully to avoid crushing it.

Follow these steps to securely fix the TOSHIBA MMK-UP0271HP-E to the installation plate:

1. Pass the pipe through the hole in the wall, and hook the indoor unit on the installation plate at the upper hooks.

2. Swing the indoor unit to the right and left to confirm that it is firmly hooked up on the installation plate.

3. While pressing the indoor unit onto the wall, hook it at the lower part of the installation plate. Pull the indoor unit toward you to confirm that it is firmly hooked.

• To detach the indoor unit, pull it toward you while pushing its bottom up at the specified parts.

REQUIREMENT:

The lower part of the indoor unit may float due to the piping condition, preventing it from being fixed to the installation plate. In this case, use the provided screws to fix the unit and the plate. This is especially important when the pipes are pulled out from the left side.

For proper drainage from the TOSHIBA MMK-UP0271HP-E, follow these guidelines:

1. Run the drain hose sloped downwards. The wall hole should be made at a slight downward slant to the outdoor side.

2. Pour water into the drain pan to make sure that it drains out of doors.

3. If connecting an extension drain hose, insulate the connecting part of the extension drain hose with the shield pipe.

Important Considerations:

• Do not raise the drain hose.

• Do not form the drain hose into a wavy shape.

• Keep the end of the drain hose at least 50 mm above the ground.

• Do not put the end of the drain hose into water.

• Do not put the end of the drain hose in a drainage ditch.

CAUTION: Arrange the drain pipe for proper drainage from the unit. Improper drainage can result in dew-dropping. Do not store the power cord and other parts at a height above the drain guide inside the unit.

Refrigerant Piping Requirements:

• Material: Seamless phosphorous de-oxidized copper pipe.

• Wall thickness: 0.8 mm or more for 6.35, 9.52, and 12.7 mm pipes. 1.0 mm or more for 15.88 mm pipes.

• Support: If the refrigerant pipe is long, provide support brackets at intervals of 2.5 – 3 m to clamp it.

• Use only the flare nuts included with the unit to prevent gas leakage.

Flaring Process:

1. Cut the pipe with a pipe cutter.

2. Remove burrs completely. Remaining burrs may cause gas leakage.

3. Insert a flare nut onto the pipe, and then flare the pipe.

The flaring sizes for R32 or R410A differ from R22. It is recommended to use flare tools manufactured for R32 or R410A. Conventional tools can be used by adjusting the projection margin of the copper pipe.

Projection margin in flaring (B):

Flaring diameter size (A):

Pipe Size for TOSHIBA MMK-UP0271HP-E (and UP036 type):

Tightening Flare Pipe Connections:

Incorrect connections can cause gas leaks and refrigeration cycle problems. Align the centers of the connecting pipes and tighten the flare nut by hand as far as possible. Then, use a spanner and a torque wrench to tighten the nut to the specified torque.

Tightening Torque Values:

CAUTION: Do not apply excessive torque, as the nut may crack depending on conditions.

Heat Insulation:

• Heat insulation must be done separately for the liquid and gas side pipes to prevent condensation.

• Use a heat insulator with a heat resistance of 120°C or more for the gas side pipe.

• The pipe connection section of the indoor unit must be securely and compactly heat insulated with the attached heat insulator. Apply the insulation up to the root without exposing the pipe.

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 close, extending the time needed for vacuuming.

After completing the piping connections for your TOSHIBA MMK-UP0271HP-E and fully opening the valves of the outdoor unit, check for gas leaks from the pipe connecting section or the cap of the valve. Use a leak detector or soapy water for this check.

REQUIREMENT: Use a leak detector manufactured exclusively for HFC refrigerants (such as R410A, R134a, R32, etc.).

When two TOSHIBA MMK-UP0271HP-E air conditioners are installed closely, you can use two wireless remote controllers for respective units by setting one to “B”. Follow these steps for the B setup:

1. Push the RESET button on the indoor unit to turn the air conditioner ON.

2. Point the wireless remote controller at the indoor unit.

3. Using the tip of a pencil, push and hold the CHK button on the wireless remote controller. “00” will be shown on the display.

4. While still holding the CHK button, push the MODE button. “B” will be shown on the display, “00” will disappear, and the air conditioner will turn OFF. The wireless remote controller is now memorized as B.

NOTE:

• To reset the remote controller back to A, repeat the steps above.

• The remote controller does not display “A”.

• The factory default setting for wireless remote controllers is “A”.

WARNING

1. Use the specified wires, ensure they are connected securely, and fix them so that external tension does not affect the terminal connections. Incomplete connection or fixation may cause a fire.

2. Be sure to connect the earth wire (grounding). Incomplete grounding can cause an electric shock. Do not connect ground wires to gas pipes, water pipes, lightning rods, or telephone ground wires.

3. The appliance must be installed in accordance with national wiring regulations. A shortage of power circuit capacity or incomplete installation can cause an electric shock or a fire.

CAUTION

• For communication lines, use wires of the same type and size. Different types and sizes can cause communication trouble.

• Incorrect or incomplete wiring can cause an electrical fire or smoke.

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

• Use the cord clamps attached to the product.

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

• Use power supply and control wires of the specified thickness, type, and protective devices.

• Do not connect 208-240V power to the control wiring terminal blocks (Uv(U1), Uv(U2), A, B), as this will cause system failure.

• Perform electric wiring so that it does not contact the high-temperature part of the pipe, as the coating may melt and result in an accident.

REQUIREMENT

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

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

• After connecting wires to the terminal blocks, provide a trap and fix wires with the cord clamp.

• Run the refrigerant piping line and control wiring line in the same line.

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

Power supply and communication wires for the TOSHIBA MMK-UP0271HP-E are procured locally.

Indoor Unit Power Supply

• Prepare an exclusive power supply for the indoor unit, independent of the outdoor unit.

• Arrange the power supplies to the indoor and outdoor units so that a common earth leakage breaker and main switch can be used.

• Power supply wire specification: Cable 3-core 2.5 mm², in conformity with Design H07RN-F or 60245 IEC 57.

Control Wiring, Central Controller Wiring

• Use a 2-core non-polarity wire.

• To prevent noise issues, use a shielded 2-core wire.

• The total stated length of communication wiring is determined by the interconnecting length of indoor to outdoor wire plus the length of the central control communication wire.

Communication Line Specifications

When combining with SMMS-u series outdoor units:

• Uv and Uc line (L2, L3, L4): 2-core shield wire, non-polarity. Wire size: 0.5 mm² (Up to 500 m), 0.75 to 1.25 mm² (Up to 1000 m).

• Uh line (L1): 2-core shield wire, non-polarity. Wire size: 0.75 to 1.25 mm² (Up to 1000 m), 2.0 mm² (Up to 2000 m).

When combining with outdoor units other than SMMS-u series (SMMS-i, SMMS-e, etc.):

• Control wiring between indoor and outdoor units (L2, L3): 2-core shield wire, non-polarity. Wire size: 1.25 mm² (Up to 1000 m), 2.0 mm² (Up to 2000 m).

• Central control line wiring (L1): Same as above.

• Control wiring between outdoor units (L4): 2-core shield wire, non-polarity. Wire size: 1.25 to 2.0 mm² (Up to 100 m).

For wiring a remote controller to your TOSHIBA MMK-UP0271HP-E, a 2-core non-polarity wire must be used. The wire size should be from 0.5 mm² to 2.0 mm².

Total Wire Length Limits:

• Wired type only: Up to 500 m
• Wireless type included: Up to 400 m
• Remote controller inter-unit wiring only: Up to 200 m

CAUTION: The remote controller wire (Communication line) and AC 208-240V wires cannot be parallel, contact each other, or be stored in the same conduits to avoid control system trouble due to noise.

Maximum Number of Connectable Indoor Units and Communication Type:

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 change.

The power supply and control wires for the TOSHIBA MMK-UP0271HP-E can be connected without removing the front panel. Connect the power supply wire after connecting the control wire.

1. Remove the air inlet grille by opening it upward and pulling it toward you.

2. Remove the terminal cover and the clamp base.

3. Insert the power supply wire and control wire into the pipe hole on the wall.

4. Take the power supply wire out of the cable slot on the rear panel so it protrudes about 150 mm from the front.

5. Insert the control wire fully into the control/wired remote controller terminal block (Uv(U1), Uv(U2), A, B) and secure it tightly with screws.

6. Clamp the control wire with the cord clamp.

7. Install the clamp base with a screw.

8. Insert the power supply wire fully into the terminal block and secure it tightly. Tightening torque: 1.2 N·m (0.12 kgf·m). Secure the earth line with the earth screw.

9. Clamp the power supply wire with the cord clamp.

10. Attach the terminal cover and the air inlet grille to the indoor unit.

CAUTION: Be sure to refer to the wiring diagram attached inside the front panel. Do not catch the control wire when installing the clamp base.

To change settings on your TOSHIBA MMK-UP0271HP-E, use the wired remote controller (e.g., RBC-ASCU11-E). Be sure to stop the air conditioner before making settings.

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

2. Select the indoor unit you want to change settings for by pressing the [▽] or [△] setting buttons. The fan of the selected unit will run for identification.

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 [▽] or [△] setting buttons. (Refer to the manual for specific Code Nos.)

5. Push the menu button again to make the Set data [****] flash. Change the Set data using the [▽] or [△] setting buttons.

6. Push the OFF timer button. This completes the setup for that setting. To change other settings for the same unit, repeat from step 4.

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

CAUTION: Set only the Code No. shown in the tables provided in the manual. Setting an unlisted Code No. may cause operational issues.

You can change the lighting time of the filter sign (notification for filter cleaning) on your TOSHIBA MMK-UP0271HP-E by following the basic setup procedure with the wired remote controller:

1. Follow the basic procedure steps 1 through 3 to select the indoor unit.

2. In Procedure 4, specify Code No. [01].

3. In Procedure 5, select the desired SET DATA from the table below.

4. Complete the setup by following steps 6 and 7.

If you are not obtaining satisfactory heating from your TOSHIBA MMK-UP0271HP-E due to the installation place or room structure, you can raise the detection temperature. Follow the basic setup procedure with the wired remote controller:

1. Follow the basic procedure steps 1 through 3 to select the indoor unit.

2. In Procedure 4, specify Code No. [06].

3. In Procedure 5, select the desired SET DATA (shift value) from the table below.

4. Complete the setup by following steps 6 and 7.

Adjustment of Air Direction

1. Up/Down Direction: Use the remote controller switch to change the up/down air direction by moving the horizontal louver.

2. Right/Left Direction: Adjust the right/left air direction by manually bending the vertical grille inside the air outlet port with your hands.

REQUIREMENT: Do not touch the horizontal louver directly with your hands; otherwise, a trouble may be caused.

Group Control

A single remote controller can control a group of up to 8 or 16 units, depending on the outdoor unit. This feature is only available with a wired remote controller; the wireless remote controller cannot be used for group control.

• For cabling procedures, refer to the “Electrical connection” section of the manual.

• Cabling between indoor units in a group is done by connecting the remote controller inter-unit cables from the remote controller terminal blocks (A, B) of the main indoor unit to the terminal blocks (A, B) of the other indoor units (non-polarity).

• For address setup, refer to the Installation Manual attached to the outdoor unit.

Before the test run:

• Before turning on the circuit breaker, use an insulation tester (500VΜΩ) to check that the resistance between terminal block L to N and the earth (grounding) is 1MΩ or more. If it’s less, do not run the unit.

• Check that the valve of the outdoor unit is fully open.

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

• Set addresses following the Installation Manual supplied with the outdoor unit.

Execute a test run:

Operate the unit with the remote controller as usual. For a forced test run when the operation is stopped by the thermostat, follow the specific procedures for the wired or wireless remote controller.

A forced test run will be released after 60 minutes and the unit will return to 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.

For a fan-only operation of 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”. Be sure to release the short circuit of CN72 after the test run is completed.

Using the Wired Remote Controller:

Be sure to stop the air conditioner before making settings.

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

2. Push the ON/OFF button to start.

3. Push the menu button to select the operation mode ([Cool] or [Heat]) with the [▽] [△] buttons, then push the menu button three more times to confirm. Do not run in any other mode. The temperature setting function does not work during the test run.

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

Using the Wireless Remote Controller (Forced Cooling Only):

REQUIREMENT: Finish the forced cooling operation in a short time as it applies excessive strength to the air conditioner. A test operation of forced heating is unavailable.

1. Push the [RESET] button for 10 seconds or more and then release it. A “Pi!” sound will be heard, and the operation will change to forced cooling. After approximately 3 minutes, the cooling operation will start forcibly.

2. To stop the test operation, push the [RESET] button once again (for approx. 1 second). The louver will close, and the operation will stop.

A wired remote controller is necessary to check the troubleshooting history of your TOSHIBA MMK-UP0271HP-E. The history records up to 4 incidents.

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

• `[01: Order of troubleshooting history]` appears in the temperature indicator.

• The OFF timer indicator alternately shows the [check code] and the [indoor Unit No.] where the problem occurred.

2. Each time the setting button ([▽] or [△]) 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. If the air conditioner was operating, it remains operating. To stop it, push the ON/OFF button again.

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 tables list the check codes for the TOSHIBA MMK-UP0271HP-E. The display will vary depending on whether you are checking from the wired remote controller, the outdoor unit 7-segment display, or the wireless remote controller’s receiving unit LEDs.

(O: Lighting, Q: Flashing, ●: Goes off)

Trouble detected by central control device:

The specifications for the TOSHIBA MMK-UP0271HP-E indoor unit models are as follows:

* Under 70 dBA

The Notice Code function on your TOSHIBA MMK-UP0271HP-E is available only in TC2U-Link communication and indicates conditions requiring caution or maintenance. The unit can still operate normally while a notice code is displayed (indicated by a spanner mark on the wired remote).

How to check Notice Code No.:

1. Stop the operation of the air conditioner. 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. 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 (a maximum of 5 notice codes) with the [▽] [△] setting button.

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 the installation of an inverter R32 product like the TOSHIBA MMK-UP0271HP-E, provided specific conditions are met.

Basic Conditions for Reusing 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 (Do not reuse if any of these apply):

• The pipe has heavy scratches or dents.

• The existing pipe thickness is thinner than specified in the table below. The operating pressure of R32 is high and requires adequate pressure strength.

• The outdoor unit was left with pipes disconnected, or gas leaked and was not repaired (risk of moisture/air ingress).

• Refrigerant cannot be recovered using a recovery unit (risk of dirty oil or moisture inside).

• A commercially available dryer is attached (risk of copper green rust).

• Refrigerant oil is discolored (green), contains residue, or has a bad smell.

• The previous air conditioner had a compressor failure and was replaced.

• The air conditioner was used for temporary installations like leasing.

• The refrigerator oil of the existing system is not mineral oil, Suniso, Freol-S, MS, alkyl benzene, ester, or PVE series.

If you have confirmed that the existing pipes are free of scratches and dents and the existing air conditioner is operable, follow this procedure:

1. Operate the existing air conditioner in cooling mode for approximately 30 minutes or longer to recover the refrigerant using the pump-down method.

2. Remove the existing air conditioner from the piping and perform flushing with nitrogen gas at 0.5 MPa to remove any remains inside the pipe. For twin pipes, flush the branching pipe as well.

3. If a large quantity of discolored oil or remains is discharged, the pipes cannot be reused. You must clean the pipes or use new pipes.

4. If the oil is clean, connect the indoor/outdoor units to the existing pipe. Use the new flare nuts attached to the TOSHIBA MMK-UP0271HP-E main unit.

5. Re-machine the flare to the size required for R32/R410A, as shown in the tables below.

Flare Nut Width (H):

Flare Machining Size (A):

Do not apply refrigerator oil to the flare surface.

6. Perform an airtight test, vacuum dry, refrigerant charge, and gas leak check.

7. Conduct a test run.

The room where the TOSHIBA MMK-UP0271HP-E is installed must be designed so that in the event of a refrigerant gas leak, its concentration will not exceed a set limit.

• Refrigerant R32: This refrigerant is mildly flammable. If the appliance is connected with an outdoor unit containing R32 refrigerant, refer to the Installation and Owner’s Manual attached to the outdoor unit for specific requirements.

• Refrigerant R410A: This refrigerant is non-toxic and non-combustible but can cause suffocation if its concentration becomes excessively high. While this is rare, in modern high-concentration buildings with multi-air conditioner systems, a large amount of refrigerant could leak.

To mitigate risks in a room where the concentration limit might be exceeded:

• Create an opening with adjacent rooms.

• Install mechanical ventilation or isolation, combined with a gas leak detection device, which complies with local regulatory requirements.

The concentration limit is calculated as: Total amount of refrigerant (kg) / Minimum volume of the indoor unit installed room (m³) ≤ Concentration limit (kg/m³).

The Refrigerant Concentration Limit must be in accordance with local regulations.

After installing the TOSHIBA MMK-UP0271HP-E, it is required for maintenance purposes to check and record the following setup parameters on the provided check sheet:

1. Indoor Unit Address:

• Check the Line, Indoor, Group, and Central control addresses.

2. High Ceiling Setup (CODE No. [5d]):

• Confirm if the setting is STANDARD, HIGH CEILING 1, or HIGH CEILING 3.

3. Filter Sign Lighting Time (CODE No. [01]):

• Confirm the set interval: NONE, 150H, 2500H, 5000H, or 10000H.

4. Detected Temperature Shift Value (CODE No. [06]):

• Confirm the temperature shift value, ranging from NO SHIFT to +6°C.

5. Incorporation of Separately Sold Parts:

• Confirm if any optional parts like a super long life filter have been installed.