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Mitsubishi Electric PURY-P72 Service Handbook page 219

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[ IX Troubleshooting ]
1. Error Code
4250
(THMU-A)
4255
IPM error (Detail code 101)
2. Error definition and error detection method
In the case of 4250
P72 model
Overcurrent is detected by the overcurrent detection resistor (RSH) on the INVboard.
P96 and P120 models
IPM error signal is detected.
In the case of 4255
IPM error signal is detected.
3. Cause, check method and remedy
In the case of 4250
P72 model
Cause
(1)
Inverter output related
P96 and P120 models
Cause
(1)
Inverter output related
(2)
Same as 4230 error
In the case of 4255
Cause
(1)
Fan motor abnormality
(2)
Fan board failure
Refer to section -7- "Inverter (THMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 293)
HWE0803A
Check method and remedy
Refer to IX [4] -7- (2) [1] - [4].(page 295)
Check method and remedy
Refer to IX [4] -7- (2) [1] - [4].(page 295)
Same as 4230 error
Check method and remedy
Refer to IX [4] -7- (2) [5].(page 296)
Refer to IX [4] -7- (2) [6].(page 296)
- 210 -
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