Mitsubishi Electric PUHY-P200 Service Handbook page 235

[ IX Troubleshooting ]
1. Error Code
4250
Instantaneous overcurrent (Detail code 106)
Overcurrent (Detail code 107)
2. Error definition and error detection method
P200, P250, and EP200 models
Overcurrent 94 Apeak or 22 Arms and above is detected by the current sensor.
P300 - P450, EP250, and EP300 models
Overcurrent 94 Apeak or 35 Arms and above is detected by the current sensor.
3. Cause, check method and remedy
Cause
(1) Inverter output related
Refer to section -6- "Inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.(page 285)
1. Error Code
4250
4255
Short-circuited IPM/Ground fault (Detail code 104)
2. Error definition and error detection method
When IPM/IGBT 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
(3) Electromagnetic contactor (52F) actuation failure
(P450, EP300 only)
Refer to section -6- "Inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.(page 285)
HWE10040
Refer to IX [4] -6- (2) [1] - [4].(page 287)
Check the IGBT module resistance value of the INV board, if no
problems are found.
(Refer to the Trouble shooting for IGBT module)(page 290)
Cause
Cause
Check method and remedy
Check method and remedy
Refer to IX [4] -6- (2) [2].(page 287)
Refer to IX [4] -6- (2) [1] - [4].(page 287)
Check method and remedy
Refer to IX [4] -6- (2) [5].(page 288)
Refer to IX [4] -6- (2) [6].(page 288)
Check the wiring between the FAN board, 52F, and
fan motor. (page 277)
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