14.4.15
F90 (Power Factor Correction Protection)
Malfunction Decision Conditions
•
During startup and operation of cooling and heating, 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
54
79