Mitsubishi Electric PURY-P72 Service Handbook page 222

[ IX Troubleshooting ]
1. Error Code
4250 (YHMU-A)
Instantaneous overcurrent (Detail code 106)
Overcurrent (Detail code 107)
2. Error definition and error detection method
P72 model
Overcurrent 94 Apeak or 22 Arms and above is detected by the current sensor.
P96 andP120 models
Overcurrent 94 Apeak or 35 Arms and above is detected by the current sensor.
3. Cause, check method and remedy
(1) Inverter output related
Refer to section -7- "Inverter (YHMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 301)
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
Refer to section -7- "Inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.
HWE0803A
Cause
Cause
Cause
- 213 -
Check method and remedy
Refer to IX [4] -7- (2) [1] - [4]. (page 303)
Check the IGBT module resistance value of the INV
board, if no problems are found.
(Refer to the Trouble shooting for IGBT module)
Check method and remedy
Refer to IX [4] -7- (2) [2].
Refer to IX [4] -7- (2) [1] - [4].
Check method and remedy
Refer to IX [4] -7- (2) [5].
Refer to IX [4] -7- (2) [6].
GB