Error Codes [4220, 4225, 4226] Detail Code 131; Error Code [4230] Detail Code 125 - Mitsubishi Electric PUHY-P200 Service Handbook

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-14

Error Codes [4220, 4225, 4226] Detail Code 131

1. Error code definition
Low bus voltage at startup (Detail code 131)
2. Error definition and error detection method
When Vdc 160 V is detected just before the inverter operation.
3. Cause, check method and remedy
(1) Inverter main circuit failure
Same as detail code 108 of 4220 error
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems](page 264)
7-6-15

Error Code [4230] Detail Code 125

1. Error code definition
Heatsink overheat protection (Detail code 125)
2. Error definition and error detection method
models
INV20Y
INV30YC
3. Cause, check method and remedy
Cause
(1) Fan board failure
(2) Outdoor unit fan failure
(3) Air passage blockage
(4) THHS failure
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems](page 264)
HWE14040
TOH
105°C
94°C
Refer to the following page(s).
[8-9-8 Checking the Fan Board Error Detection Circuit at No Load](page 269)
[8-9-9 Checking the Fan Inverter for Damage at No Load](page 270)
[8-9-10 Checking the Fan Inverter for Damage with Load](page 271)
Check the outdoor unit fan operation.
If any problem is found with the fan operation, check the fan motor.
Refer to the following page(s). [8-9-7 Checking the Fan Motor for Ground Fault
and Coil Resistance Problems](page 269)
Check that the heat sink cooling air passage is not blocked
1) Check for proper installation of the INV board IGBT. (Check for proper instal-
lation of the IGBT heatsink.)
2) Check the THHS sensor reading on the LED monitor.
→If an abnormal value appears, replace the INV board.
Check method and remedy
- 191 -
GB