Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 275

[ IX Troubleshooting ]
1. Error Code
4250
IPM error (Detail code 101)
2. Error definition and error detection method
Overcurrent is detected by the overcurrent detection resistor (RSH) on the INV board.
3. Cause, check method and remedy
Cause
(1) Inverter output related
(2) The model selection switches (SW5-3
- 5-8) on the Heat source unit are set
incorrectly.
Refer to section -6- "Inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.
1. Error Code
4250
Instantaneous overcurrent (Detail code 106)
Overcurrent (Detail code 107)
2. Error definition and error detection method
Refer to the relevant pages for the details of model names and the specified values.
3. Cause, check method and remedy
Cause
(1) Inverter output related
(2) The model selection switches (SW5-3
- 5-8) on the Heat source unit are set
incorrectly.
Refer to section -6- "Inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.
HWE15150
Check method and remedy
Refer to IX [4] -6- (2) [1]-[5].
Check the IGBT module resistance value of the INV board, if no
problems are found.
(Refer to the Trouble shooting for IGBT module)
Check the setting for the model selection switch on the Heat
source unit (Dipswitches SW5-3 - 5-8 on the Heat source unit con-
trol board).
For switch settings, refer to the following page(s).
Check method and remedy
Refer to IX [4] -6- (2) [1]-[5].
Check the IGBT module resistance value of the INV board if no
problems are found.
(Refer to "Troubleshooting" for IGBT module related problems)
Check the setting for the model selection switch on the Heat
source unit (Dipswitches SW5-3 - 5-8 on the Heat source unit con-
trol board).
For switch settings, refer to the following page(s).
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GB