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15.4.19 F90 (Power Factor Correction Protection)
Malfunction Decision Conditions
During startup and operation of cooling, when Power Factor Correction (PFC) protection circuitry at the outdoor
unit main PCB senses abnormal high DC voltage level.
Malfunction Caused
DC voltage peak due to power supply surge.
DC voltage peak due to compressor windings not uniform.
Faulty outdoor PCB.
Troubleshooting
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