Diagnosis Flowchart Of Driving Of Single-Phase Unit - Gree GRS-CQ6.0Pd/Na-K Service Manual

AIR-TO-WATERHEATPUMP

3.1 Diagnosis Flowchart of Driving of Single-phase Unit

3.1.1 PFC Abnormality
Fig. 3.1.1 Flowchart of diagnosis of PFC abnormality
3.1.2 IPM Protection
The reasons may be:
● Untight screws of IPM module
● damaged IPM module
● defective radiating of IPM module
● abnormal +15V power strip
● abnormal PFC module
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