Error Code 4260 - Mitsubishi Electric PQHY-P72TYHMU-A Service Handbook

[ IX Troubleshooting ]
1. Error Code
4250
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
(1) Short - circuited compressor
(2) Output wiring
Refer to section -6- "Inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.
1. Error Code
4260 (THMU-A)
Heatsink overheat protection at startup
2. Error definition and error detection method
The heatsink temperature (THHS) remains at or above TOH for 10 minutes or more at inverter startup.
Model
P72, P96, P120 models
3. Cause, check method and remedy
Same as 4230 error
1. Error Code
4260 (YHMU-A)
Heatsink overheat protection at startup
2. Error definition and error detection method
The heatsink temperature (THHS) remains at or above 100°C [212°F] for 10 minutes or more at inverter startup.
3. Cause, check method and remedy
Same as 4230 error
HWE09080
Cause
TOH
100°C [212°F]
- 258 -
Check method and remedy
Refer to IX [4] -6- (2) [2].
Check for a short circuit.
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