Mitsubishi Electric PURY-P120TJMU-A, Service Handbook, Page: 241 / 411

[
IX
Troubleshooting ]
- 232 - HWE0913A GB
1. Error Code
Overcurrent error due to short-circuited motor (Detail code 105)
2. Error definition and error detection method
When a short is detected on the load side just before starting the inverter operation.
3. Cause, Check method and remedy
In the case of 4250
In the case of 4255
Refer to section -7- "Inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.
1. Error Code
Heatsink overheat protection at startup
2. Error definition and error detection method
The heatsink temperature (THHS) remains at or above TOH for 10 minutes or more at inverter startup.
3. Cause, check method and remedy
Same as 4230 error
1. Error Code
Heatsink overheat protection at startup
2. Error definition and error detection method
The heatsink temperature (THHS) remains at or above 100°C [212°F] for 10 minutes or more at inverter startup.
3. Cause, check method and remedy
Same as 4230 error
4250
4255
Cause Check method and remedy
(1) Short - circuited compressor Refer to IX [4] -7- (2) [2].
(2) Output wiring Check for a short circuit.
Cause Check method and remedy
(1) Short - circuited fan motor Refer to IX [4] -7- (2) [5].
(2) Output wiring Check for a short circuit.
(3) Electromagnetic contactor (52F) actuation failure
(P120, P144 only) Check the wiring between the FAN board, 52F, and
fan motor.
4260 (TJMU-A)
Model TOH
P72 model 100°C [212°F]
P96, P120, P144 models 90°C [194°F]
4260 (YJMU-A)