TOSHIBA CARRIER MMY-MUP072H1HT6PUL (01) PDF Document

The priority operation mode for the TOSHIBA CARRIER MMY-MUP072H1HT6PUL is configured using the Outdoor Unit Function Code (O.DN) [18] on the header unit. The following settings are available:

Note: In the case of priority indoor unit mode, it is necessary to set up the specific indoor unit chosen for priority operation. This can only be done for a single unit and must be changed while the system is at rest.

To set up addresses automatically for the TOSHIBA CARRIER MMY-MUP072H1HT6PUL, follow these steps:

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

2. Wait approximately 1 minute after powering on and confirm that the 7-segment display on the interface P.C. board of the header unit indicates “U. 1. Err” and “L08” alternately at 1-second intervals.

3. Push SW06 on the interface board for more than 1 second to start the automatic setup. This process typically takes about 5 minutes but may take up to 10 minutes.

4. The 7-segment display will show “Auto 1”, then “Auto 2”, and finally “Auto 3”.

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

For manual address setup on the TOSHIBA CARRIER MMY-MUP072H1HT6PUL using an RBC-AMT remote controller, follow this sequence:

1. Push the SET, CL, and TEST buttons simultaneously for 4 seconds or more until the LCD begins blinking.

2. Set the Refrigerant Line Address: Use the TEMP buttons to set DN code 12. Use the TIME buttons to match the line address set on the header unit interface board. Push SET to confirm.

3. Set the Indoor Address: Use the TEMP buttons to set DN code 13. Use the TIME buttons to set the indoor address (0001 to 0128 for TU2C-LINK). Push SET to confirm.

4. Set the Group Address: Use the TEMP buttons to set DN code 14. Use the TIME buttons to set Individual (0000), Header unit (0001), or Follower unit (0002). Push SET to confirm.

5. Set the Central Control Address: Use the TEMP buttons to set DN code 03. Use the TIME buttons to set the central control address. Push SET to confirm.

6. Push the TEST button to finish the setup. “Setting up” will flash and then go off when operation is possible.

The following resistance values should be measured at 68 degrees Fahrenheit (20 degrees Celsius) using a digital tester:

Check codes can be cleared using the switches on the interface board of the TOSHIBA CARRIER MMY-MUP072H1HT6PUL header unit without resetting the power supply:

1. Set the rotary switches SW01/SW02/SW03 to [2/16/1]. The 7-segment display will show “E r”.

2. Push and hold the push-switch SW04 for 5 seconds or more.

3. When “C L” is displayed on the 7-segment display [B] for 5 seconds, the check codes are completely cleared.

4. Return the rotary switches to [1/1/1] after the operation is finished.

When the Night Operation function is activated on the TOSHIBA CARRIER MMY-MUP072H1HT6PUL, the sound level is reduced, which may also reduce heating and cooling performance. The estimated capacity ratios are as follows:

Note: The sound level is measured at 1 meter from the front face of the unit and 1.5 meters above the ground.

To check the oil level judgment for the TOSHIBA CARRIER MMY-MUP072H1HT6PUL, set rotary switches SW01/SW02/SW03 to [1/16/1]. The 7-segment display will show [oL] followed by the results for each compressor:

0: Normal. The amount of oil in the compressor is sufficient.

1 or 2: Low level. The amount of oil is insufficient. If this persists, the system will perform a protective shutdown.

Example display [oL] [0 0 …]: This indicates the oil level is normal for both compressor 1 and compressor 2.

Example display [oL] [2 2 …]: This indicates the oil level is low for both compressors.

If the troubled TOSHIBA CARRIER MMY-MUP072H1HT6PUL unit can be energized, use “Refrigerant recovery procedure A”:

1. Connect the check joint of the liquid pipe and the low-pressure side check joint using a charge hose and purge the hose of air.

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

3. Set rotary switches SW01/02/03 on the troubled unit’s interface board to [2/11/1]. [rd] will be displayed.

4. Push SW04 and hold for 5 seconds or more. The display will show [rd] [FF], and reclaim operation will start. The troubled unit’s fan will turn ON, and its PMVs will open.

5. Approximately 20 minutes after startup, fully close the gas pipe service valve of the troubled unit.

6. Push SW05 on the interface board to finish the reclaim operation.

7. Turn off the power and use a recovery device to recover any remaining residual gas.

The “P04” check code on the TOSHIBA CARRIER MMY-MUP072H1HT6PUL indicates a high-pressure SW (Switch) system trouble. You should perform the following checks:

1. Ensure service valves are fully opened (both gas and liquid sides).

2. Check for failure of the Pd pressure sensor or its characteristics.

3. Inspect for indoor or outdoor fan system failure.

4. Check for clogging in the indoor or outdoor pulse motor valves (PMV).

5. Check for clogging or short-circuiting in the heat exchangers.

6. Verify if there is a refrigerant overcharge.

7. Inspect for a malfunction in the discharge line check valve.

The total additional refrigerant charge for a system using the TOSHIBA CARRIER MMY-MUP072H1HT6PUL is determined by the formula: [1] + [2] + [3] + [4].

[1] Compensation amount based on outdoor unit capacity: For a single MUP072* unit, this is 2.20 lbs (1.00 kg).

[2] Charge based on liquid pipe size: Multiply the real length of each liquid pipe size by the corresponding amount:

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

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

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

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

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

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

[3] Charge based on indoor unit capacity: Standard units ranging from capacity code 7.5 to 96 require between 0.44 lbs to 2.20 lbs (0.2 kg to 1.0 kg).

[4] Corrected amount based on system diversity: If diversity (D) is 95% or greater, the correction is 0. If it is lower, a subtraction is applied (e.g., -5.51 lbs for 50% to 60% diversity).