Error Code [5301] Detail Code 120 (Ylmu); Error Codes [5305, 5306] Detail Code 132 - Mitsubishi Electric R410A Service Handbook

[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ]
7-6-14

Error Code [5301] Detail Code 120 (YLMU)

1. Error code definition
Faulty ACCT wiring (Detail code 120)
2. Error definition and error detection method
Presence of target current cannot be detected during the self-diagnostic operation immediately before startup.
3. Cause, check method and remedy
Cause
(1) Inverter output wiring
problem
(2) Inverter failure
(3) Compressor failure
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems (YLMU)](page 276)
7-6-15

Error Codes [5305, 5306] Detail Code 132

1. Error code definition
Position detection error at startup (Detail code 132)
2. Error definition and error detection method
When a motor sensor has detected an error within 10 seconds after the fan motor has gone into operation.
3. Cause, check method and remedy
Cause
(1) Contact failure and faulty
fan motor wiring
(2) Fan board failure
(3) Fan motor error
For inverter-related error codes, refer to the following page(s).
[8-9 Troubleshooting Inverter Problems (TLMU)](page 264)
[8-10 Troubleshooting Inverter Problems (YLMU)](page 276)
HWE14080
Check method and remedy
Check output wiring connections.
Confirm that the U- and W-phase output cables are put through CT12 and CT22 on
the INV board respectively.
Refer to the following page(s).
[8-10-4 Checking the Inverter for Damage at No-Load](page 278)
[8-10-5 Checking the Inverter for Damage during Compressor Operation](page 279)
Refer to the following page(s).
[8-10-3 Checking the Compressor for Ground Fault and Coil Resistance Prob-
lems](page 278)
Check method and remedy
Check the fan board connector CNINV and CNSNR for proper contacts.
Check the wirign betweem the fan motor and fan board.
Refer to the following page(s).
(TLMU)
[8-9-9 Checking the Fan Inverter for Damage with Load](page 270)
(YLMU)
[8-10-9 Checking the Fan Inverter for Damage with Load](page 281)
Refer to the following page(s).
(TLMU)
[8-9-6 Checking the Fan Motor for Ground Fault and Coil Resistance Prob-
lems](page 268)
(YLMU)
[8-10-6 Checking the Fan Motor for Ground Fault and Coil Resistance Prob-
lems](page 279)
- 202 - GB