Mitsubishi Electric PUHY-P200 Service Handbook page 234

[ IX Troubleshooting ]
4250?4250 4255
1. Error Code
4250
4255
IPM error (Detail code 101)
2. Error definition and error detection method
In the case of 4250
Overcurrent is detected by the overcurrent detection resistor (RSH) on the INV board.
In the case of 4255
IPM error signal is detected.
3. Cause, check method and remedy
In the case of 4250
Cause
(1) Inverter output related
In the case of 4255
Cause
(1) Fan motor abnormality
(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
Check method and remedy
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)
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)
- 225 - GB