Mitsubishi Electric PFAV-P250VM-E Service Manual page 153

[ X Troubleshooting ]
1. Error code
4240
Overload protection
2. Error definition and error detection method
The output current (lac) below Imax (Arms) or THHS value above 100°C [212°F] is detected for 10 minutes continuously dur-
ing inverter operation
Model
P250 model
P350 and P400 models
3. Cause, check method and remedy
(1) Blocked air passage
(2) Power supply environment
(3) Inverter fault
(4) Compressor failure
Refer to section -6- "inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.(page 202)
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
Refer to section -6- "Inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.(page 202)
HWE10190
Imax(Arms)
19
27
Cause
Refer to X [4] -6- (2) [1] - [4].(page 204)
Check the IGBT module resistance value of the INV board, if no
problems are found.
(Refer to the Trouble shooting for IGBT module)
Refer to X [4] -6- (2) [5].(page 205)
Refer to X [4] -6- (2) [6].(page 205)
Check method and remedy
Check the heatsink cooling air passage for obstructions.
Check that the power supply voltage is 342V or above.
Refer to X [4] -6-.(page 202)
Check that the compressor is not overheated during operation.
→Check the refrigerant circuit (oil return).
Refer to X [4] -6- (2) [2].(page 204)
Check method and remedy
Check method and remedy
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GB