Error Codes [4250, 4255, 4256] Detail Code 105 - Mitsubishi Electric HP120TNU-A Service Handbook

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-23

Error Codes [4250, 4255, 4256] Detail Code 105

1. Error code definition
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
(1) Short - circuited compressor
(2) Output wiring
In the case of 4255 and 4256
(1) Short - circuited fan motor
(2) Output wiring
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems]
34
- chapter 7
Cause
Cause
Check method and remedy
Refer to the following page(s).
[8-10-3 Checking the Compressor for Ground Fault
and Coil Resistance Problems]
Check for a short circuit.
Check method and remedy
Refer to the following page(s).
[8-10-6 Checking the Fan Motor for Ground Fault
and Coil Resistance Problems]
Check for a short circuit.
HWE18220_GB