Overcurrent Error Due To Short-Circuited Motor; Heatsink Overheat Protection At Startup - Mitsubishi Electric PUHY-RP200 Service Handbook

[ IX Troubleshooting ]
1. Error Code
4250
4255
Overcurrent error due to short-circuited motor (Detail code 105)
2. Error definition and error detection method
When a short is detected on the load side just before starting the inverter operation.
3. Cause, Check method and remedy
In the case of 4250
(1) Short - circuited compressor
(2) Output wiring
In the case of 4255
(1) Short - circuited fan motor
(2) Output wiring
Refer to section -6- "Inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.(page 234)
1. Error Code
4260

Heatsink overheat protection at startup

2. Error definition and error detection method
The heatsink temperature (THHS) remains at or above 105°C [221°F] for 10 minutes or more at inverter startup.
3. Cause, check method and remedy
Same as 4230 error
HWE10010
Cause
Cause
Check method and remedy
Refer to IX [4] -6- (2) [2].(page 236)
Check for a short circuit.
Check method and remedy
Refer to IX [4] -6- (2) [5].(page 237)
Check for a short circuit.
- 175 - GB