Read Panasonic CS-HE9MKD / CU-HE9MKD / CS-HE12MKD / CU-HE12MKD Service Manual online
81
15.4.23. 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.
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.
• DC voltage peak due to compressor windings not uniform.
• Faulty outdoor PCB.
Troubleshooting
Click on the first or last page to see other CS-HE9MKD / CU-HE9MKD / CS-HE12MKD / CU-HE12MKD service manuals if exist.