Free English TOSHIBA CARRIER MMY-MUP1201HT6P-UL (01) PDF document. Download the PDF, use the online viewer, or browse the FAQs for easy troubleshooting.
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What are the necessary checks at main power-on for the TOSHIBA CARRIER MMY-MUP1201HT6P-UL?
After turning on the main power of the indoor units and outdoor unit, check the following items in order: indoor unit then outdoor unit.
1. Check that all the rotary switches, SW01, SW02, and SW03, on the interface PC board of the header unit are set to 1.
2. If any check code is displayed on the 7-segment display, remove the cause of the problem referring to the troubleshooting section.
3. Check that L08 is displayed on the 7-segment display on the interface PC board of the header unit. L08 indicates the indoor address is not set up. If address setup has already been completed, only U1 will be displayed.
How do you perform the automatic address setup for the TOSHIBA CARRIER MMY-MUP1201HT6P-UL?
Automatic address setup is performed following these steps:
Step 1. Turn on indoor units first, and then turn on outdoor units.
Step 2. About 1 minute after turning the power on, confirm that the 7-segment display on the interface P.C. board of the header outdoor unit indicates U. 1. Err (U. 1. flash) and L08 alternately at 1 second intervals.
Step 3. Push SW06 for more than 1 second to start the automatic address setting. This process may take up to 10 minutes, though normally it completes in about 5 minutes.
Step 4. The 7-segment display will indicate Auto 1 to Auto 2 to Auto 3. The setting is complete when the display changes to U. 1. – – – (U. 1. flash) or U. 1. – – – (U. 1. light).
Step 5. Set the central control address if applicable, referring to the installation manuals of the central control devices.
What is the procedure for a cooling test operation on the TOSHIBA CARRIER MMY-MUP1201HT6P-UL?
The cooling test operation can be initiated from the interface P.C. board of the header unit using the following procedure:
Step 1. Set SW01/SW02/SW03 on the interface P.C. board of the header unit to [2/5/1]. The display [C. ] will appear on the 7-segment display.
Step 2. Push SW04 on the same board for 2 seconds or more to start the test.
Step 3. Confirm that [Test run] is displayed on the remote controller of the indoor unit and check that [ – C] is displayed on the 7-segment display on the interface P.C. board of the header unit.
Step 4. To stop or end the test, return SW01/SW02/SW03 to [1/1/1] or push the push-switch SW05 for 2 seconds or more.
Note: The test operation returns to normal operation automatically after 60 minutes.
How can the priority operation mode be set for the TOSHIBA CARRIER MMY-MUP1201HT6P-UL?
The priority operation mode is set by changing the outdoor unit Function Code (O.DN) [18] on the header unit. The following table identifies the available settings:
| O.DN [18] Setting | Operation Mode |
|---|---|
| 0000 | Priority heating (factory default) |
| 0001 | Priority cooling |
| 0002 | Priority operation based on No. of units in operation (priority given to the mode with the largest share of units) |
| 0003 | Priority indoor unit (priority given to the operation mode of a specific indoor unit) |
What do the oil level judgment results indicate on the TOSHIBA CARRIER MMY-MUP1201HT6P-UL?
The oil level judgment results can be accessed by setting SW01/SW02/SW03 to 1/16/1. The result is displayed as [oL] followed by two digits representing compressor 1 and 2.
| Displayed Digit | Judgment Result | Description |
|---|---|---|
| 0 | Normal | The amount of oil in the compressor is sufficient. |
| 1 or 2 | Low level | The amount of oil in the compressor is insufficient. If this result persists, the system will turn itself off in a protective shutdown. |
Example: [oL] [0 0] means oil level is normal for both compressors. [oL] [2 2] means oil level is low for both compressors.
What are the steps for manual address setup from the remote controller for a TOSHIBA CARRIER MMY-MUP1201HT6P-UL system?
Manual address setup is used when indoor unit addresses are decided in advance or need modification. Using the RBC-AMT remote controller:
1. Arrange one indoor unit and one remote controller set to 1 by 1.
2. Turn on the power.
3. Push the SET, CL, and TEST buttons simultaneously for 4 seconds or more. The LCD will begin blinking.
4. Set the Refrigerant Line Address: Use the TEMP buttons to set DN code to 12. Use the TIME buttons to set the line address to match the header outdoor unit.
5. Push the SET button.
6. Set the Indoor Address: Use the TEMP buttons to set DN code to 13. Use the TIME buttons to set the indoor address (0001 to 0128 for TU2C-LINK).
7. Push the SET button.
8. Set the Group Address: Use the TEMP buttons to set DN code to 14. Set 0000 for individual, 0001 for header, or 0002 for follower using the TIME buttons.
9. Push the SET button.
10. Push the TEST button to finish. Setup is finished when “Setting up” goes off.
What are the symptoms and causes for check code P04 on the TOSHIBA CARRIER MMY-MUP1201HT6P-UL?
Check code P04 identifies trouble concerning the high-pressure switch (SW).
Possible Causes:
1. Service valve is closed.
2. High-pressure switch failure or Pd sensor trouble.
3. Indoor or outdoor fan trouble.
4. Indoor or outdoor PMV is choked.
5. Clogging of the indoor or outdoor heat exchanger or an air short circuit.
6. Refrigerant overcharge.
7. SV4 circuit trouble or discharge line check valve malfunction.
How do you clear a check code using the switches on the interface board of the TOSHIBA CARRIER MMY-MUP1201HT6P-UL header unit?
To clear currently detected check codes for the refrigerant circuit system without resetting the power supply:
Step 1. Set the rotary switches on the interface P.C. board of the header unit to SW01=2, SW02=16, SW03=1. The display will show [ E r ] [ ].
Step 2. Push the push-switch SW04 on the same board for 5 seconds or more.
Step 3. [ C L] will be displayed in the 7-segment display [B] for 5 seconds, indicating the check code is completely cleared.
Step 4. Return the rotary switches to [1/1/1].
What are the resistance characteristics for the outdoor temperature sensors of the TOSHIBA CARRIER MMY-MUP1201HT6P-UL?
The following table lists the resistance values for TS1, TS3, TE1, TE2, TE3, TL1, TL2, TL3, and TO sensors at various temperatures:
| Temperature °F(°C) | Resistance [kohm] |
|---|---|
| 32(0) | 33.8 |
| 50(10) | 20.4 |
| 68(20) | 13.0 |
| 77(25) | 10.0 |
| 86(30) | 8.0 |
| 104(40) | 5.2 |
| 122(50) | 3.5 |
How do you implement the Night Operation (sound reduction) control on the TOSHIBA CARRIER MMY-MUP1201HT6P-UL?
Night operation control reduces the sound of the outdoor unit by prioritizing quietness. It can be set via the RBC-AWSU remote controller:
1. Push the Menu button.
2. Select “6. Night operation” and push Set.
3. Select “1. Night operation” and set to “ON”.
4. Select “2. Start time” and “3. End time” to set the specific operation window (e.g., 22:00 to 06:00).
Note: Capacity may be reduced during this operation. For the MMY-MUP1201HT6P-UL, cooling capacity is approximately 85% and heating capacity is approximately 80% during sound reduction mode.
What is the procedure to check the inverter output for the TOSHIBA CARRIER MMY-MUP1201HT6P-UL?
To check if the inverter is outputting voltage correctly to the compressor:
Step 1. Turn off the power supply.
Step 2. Remove the compressor leads from the compressor P.C. board.
Step 3. Turn on the power supply and start a cooling or heating operation.
Step 4. Measure the output voltage across each pair of inverter-side terminals (CN201-CN202, CN202-CN203, CN203-CN201). The criterion for a normal reading is between 240V and 400V. If the result is outside this range, the compressor P.C. board must be replaced.
How is refrigerant recovered from a troubled TOSHIBA CARRIER MMY-MUP1201HT6P-UL outdoor unit using the reclaim method?
If the troubled unit can be energized (Procedure A):
1. Connect the liquid pipe check joint and 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 valve open.
3. Set SW01/02/03 on the interface board of the troubled unit to [2/11/1]. [rd] will be displayed.
4. Push SW04 for 5 seconds or more. The display will show [rd] [FF], and the reclaim operation will start. The outdoor fan will turn on and PMVs will open.
5. After approximately 20 minutes, fully close the gas pipe service valve of the troubled unit.
6. Push SW05 to finish the operation and turn off the power to all outdoor units.
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