Mitsubishi Electric PUHY-HP144TSHMU-A Service Handbook page 150

[ IX Troubleshooting ]
1. Error Code
4250
ACCT overcurrent (Hardware detection) (Detail code 102)
DCCT overcurrent (Hardware detection) (Detail code 103)
Instantaneous overcurrent (Detail code 106)
Overcurrent (Detail code 107)
2. Error definition and error detection method
Overcurrent 128 Apeak or 60 Arms and above is detected by the current sensor.
3. Cause, check method and remedy
(1) Inverter output related
Refer to section - 6 - "Inverter" under part [4] "Trouble shooting principal parts" for error codes related to the
inverter.(page 196)
1. Error Code
4250
4255
Short-circuited IPM/Ground fault (Detail code 104)
2. Error definition and error detection method
When IPM short damage or grounding on the load side is detected just before starting the inverter.
3. Cause, check method and remedy
In the case of 4250
(1) Grounding fault compressor
(2) Inverter output related
In the case of 4255
(1) Grounding fault of fan motor
(2) Fan board failure
Refer to section - 6 - "Inverter" under part [4] "Trouble shooting principal parts" for error codes related to the
inverter.(page 196)
HWE0716A
Cause
Cause
Cause
- 141 -
Check method and remedy
Refer to 9 [4] - 6 - (2) [1] - [4].(page 198)
Check method and remedy
Refer to 9 [4] - 6 - (2) [2].(page 198)
Refer to 9 [4] - 6 - (2) [1]- [4].(page 198)
Check method and remedy
Refer to 9 [4] - 6 - (2) [5].(page 199)
Refer to 9 [4] - 6 - (2) [6].(page 199)
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