TOSHIBA CARRIER MMY-MUP0721HT6P-UL (01) PDF Document

When undertaking work on the TOSHIBA CARRIER MMY-MUP0721HT6P-UL, specific protective gear is required based on the task:

All types of work: Protective gloves and safety working clothing.

Electrical related work: Gloves to provide protection for electricians, insulating shoes, and clothing to provide protection from electric shock.

Work done at heights (50 cm or more): Helmets for use in industry.

Transportation of heavy objects: Shoes with additional protective toecap.

Repair of outdoor unit: Gloves to provide protection for electricians.

The TOSHIBA CARRIER MMY-MUP0721HT6P-UL must be handled carefully observing these items:

1. When using a forklift truck for transportation, insert the fork into the rectangular holes for handling provided at the base of the unit.

2. When lifting the unit, insert a rope able to bear the unit weight into the rectangular holes for handling and tie the unit from four sides.

3. Apply padding in positions where the rope comes into contact with the unit so that no damage is caused to the outer surface.

4. Do not pass ropes through the side surfaces as there are reinforcing plates that prevent this.

The weights for the TOSHIBA CARRIER MMY-MUP0721HT6P-UL (Model type A) are as follows:

X: 20.6 inches (523 mm)

Y: 13.0 inches (330 mm)

Z: 28.0 inches (710 mm)

Total Weight: 520.3 Lbs (236 Kg)

For the TOSHIBA CARRIER MMY-MUP0721HT6P-UL, the total additional refrigerant charge is calculated using the following formula: Additional amount = [1] + [2] + [3] + [4].

[1] Compensation amount based on outdoor unit capacity type: For model 072, this is 2.20 lbs (1.00 kg).

[2] Additional amount based on liquid pipe size (Real length x Amount per foot):

1/4 inch pipe: 0.017 lbs/ft (0.025 kg/m)

3/8 inch pipe: 0.037 lbs/ft (0.055 kg/m)

1/2 inch pipe: 0.071 lbs/ft (0.105 kg/m)

5/8 inch pipe: 0.108 lbs/ft (0.160 kg/m)

3/4 inch pipe: 0.168 lbs/ft (0.250 kg/m)

7/8 inch pipe: 0.235 lbs/ft (0.350 kg/m)

[3] Additional amount based on indoor unit capacity type: For capacity code 7.5, add 0.44 lbs (0.2 kg). For code 9.5, add 0.44 lbs (0.2 kg). For codes 12 to 18, add 0.88 lbs (0.4 kg).

[4] Corrected amount based on outdoor unit diversity (D %):

50% to 60%: -5.51 lbs (-2.5 kg)

60% to 70%: -4.41 lbs (-2.0 kg)

70% to 80%: -3.31 lbs (-1.5 kg)

80% to 90%: -2.2 lbs (-1.0 kg)

90% to 95%: -1.1 lbs (-0.5 kg)

95% or higher: 0 lbs (0 kg)

To set the Function Code on the TOSHIBA CARRIER MMY-MUP0721HT6P-UL interface P.C. board, follow these steps while the unit is stopped:

1. Set the rotary switches to SW01=9, SW02=1, and SW03=1.

2. Confirm the 7 segment display shows “d n.S E t”.

3. Push SW04; the display will switch to “d n.0 0 1”.

4. Use SW05 (advance) or SW06 (return) to navigate to the desired outdoor unit code number.

5. Push SW04; the display will blink the setting data currently being set.

6. Change the setting data using SW05 or SW06.

7. Push and hold SW04 for more than 2 seconds to save. The flashing will stop and remain lit when complete.

8. Return rotary switches SW01, SW02, and SW03 to 1, 1, 1.

9. Reset the power of the outdoor unit by turning it off for at least one minute.

The TOSHIBA CARRIER MMY-MUP0721HT6P-UL allows for four patterns of priority operation mode, set via Outdoor DN Code [18]:

O.DN [18] = 0000: Priority heating (factory default).

O.DN [18] = 0001: Priority cooling.

O.DN [18] = 0002: Priority operation based on the number of units in operation (priority given to the mode with the largest share of units).

O.DN [18] = 0003: Priority indoor unit (priority given to the operation mode of a specific designated indoor unit).

Perform the automatic address setup for the TOSHIBA CARRIER MMY-MUP0721HT6P-UL using this procedure:

1. Turn on the indoor units first, then turn on the outdoor units.

2. Wait about 1 minute and confirm the 7 segment display on the header unit indicates “U.1. Err” and “L08” alternately.

3. Push SW06 on the interface board for more than 1 second. The setup may take up to 10 minutes.

4. The display will show “Auto 1”, “Auto 2”, then “Auto 3”.

5. The process is complete when the display changes to “U.1. – – -” (flashing or light).

Common troubleshooting check codes for the TOSHIBA CARRIER MMY-MUP0721HT6P-UL include:

E01: Indoor-remote controller communication trouble. Check remote controller wiring and connectors.

E03: Loss of communication between the indoor unit and remote controller. Check power supply and indoor P.C. board.

E04: Indoor-outdoor communication circuit trouble. Check the U1/U2 terminals and terminator resistor settings.

E08: Duplicated indoor address. Ensure no two indoor units have the same address.

E16: Capacity over or number of units connected exceeds limit. Check total capacity of connected indoor units.

F04: Outdoor discharge temperature sensor (TD1) trouble. Check for open or short circuits in the sensor.

H01: Compressor breakdown (Inverter current detection). Check power supply voltage and compressor circuit.

P10: Indoor overflow trouble. Check the float switch and drain pump operation.

P20: Activation of high pressure protection. Check service valves, outdoor fan, and PMV for clogging.

To check the fan operation on the TOSHIBA CARRIER MMY-MUP0721HT6P-UL while the compressor is stopped:

1. Set rotary switches SW01/SW02/SW03 to 2, 1, 4. The display will show “F. d”.

2. Push SW04 for 2 seconds or more. The fan will start at maximum mode (mode 63).

3. Change the fan mode by adjusting SW02 and SW03 to different numbers to test various speeds.

4. To clear the function, change SW01 to another number or push SW05 for more than 2 seconds.

If the unit can be energized, use Procedure A for the TOSHIBA CARRIER MMY-MUP0721HT6P-UL:

1. Connect a charge hose between the liquid pipe check joint and the low pressure side check joint and purge the hose.

2. Fully close the liquid pipe service valve of the troubled unit, leaving the gas pipe service valve open.

3. Set SW01/02/03 to 2, 11, 1. The display shows “rd”.

4. Push SW04 and hold for 5 seconds. The display will show “rd FF” as reclamation starts.

5. After approximately 20 minutes, fully close the gas pipe service valve.

6. Push SW05 to finish. Turn off power and recover any residual gas with a recovery device.

The TOSHIBA CARRIER MMY-MUP0721HT6P-UL only contains one compressor, so internal compressor backup operation is not possible for this specific model. Backup operation for this unit can only be performed at the system level if multiple outdoor units are combined.

To clear outdoor unit check codes using an RBC-AMT* remote controller for the TOSHIBA CARRIER MMY-MUP0721HT6P-UL:

1. Push the Set, CL, and Test buttons simultaneously for 4 seconds or more to enter service monitor mode.

2. Use the temperature setup buttons to set the CODE No. to “FF”.

3. The display will count down from 0005 to 0000 in 5 second intervals. When it reaches 0000, the check code is cleared.

4. Push the Test button to return to normal status.

Indoor unit check codes are cleared by pushing the ON/OFF button on the remote controller.

To manually set addresses for the TOSHIBA CARRIER MMY-MUP0721HT6P-UL:

1. Turn on the power and push the Set, CL, and Test buttons for 4 seconds until the LCD blinks.

2. Set the Refrigerant Line Address: Use TEMP buttons to set DN code 12, then set the line address to match the header outdoor unit.

3. Push the Set button.

4. Set the Indoor Address: Set DN code 13, then select the indoor address (0001 to 0128 for TU2C-LINK).

5. Push the Set button.

6. Set the Group Address: Set DN code 14, then select 0000 (Individual), 0001 (Header), or 0002 (Follower).

7. Push the Set button.

8. Set the Central Control Address: Set DN code 03, then select the desired central address.

9. Push the Set button, then the Test button to finish. The “Setting up” display will blink and then disappear.