GREE DC INVERTER HEAT PUMP CONDENSING UNIT SERVICE MANUAL
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Troubleshooting
：
3.4.25 “P7” Module temperature sensor circuit failure
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
If IPM or PFC module temperature is lower than the set protection value, then it can be judged that driver
module sensor error occurs and system will shut down for protection.
Possible reason:
■Module temperature sensor is short-circuited or broken-circuited.
■Drive board current sampling circuit element is damaged or drive chip current sampling AD terminal is
abnormal.
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