Panasonic CS-E18QB4RW Service Manual page 81

15.4.22 F97 (Compressor Overheating)
Malfunction Decision Conditions

During operation of cooling and heating, when compressor tank temperature data (112°C) is detected by the
compressor tank temperature sensor.
Malfunction Caused

Faulty compressor tank temperature sensor

2/3 way valve closed

Refrigerant shortage (refrigerant leakage)

Faulty outdoor unit PCB

Faulty compressor
Troubleshooting
81