Panasonic CS-XE9SKUA Service Manual page 73

15.4.19 F17 (Indoor Standby Units Freezing Abnormality)
Malfunction Decision Conditions

When the different between indoor intake air temperature and indoor pipe temperature is above 50°F (10°C) or
indoor pipe temperature is below 30.2°F (-1.0°C).
Remark:
When the indoor standby unit is freezing, the outdoor unit transfers F17 error code to the corresponding indoor
unit and H39 to other indoor unit(s).
Malfunction Caused

Wrong wiring connection

Faulty sensor

Faulty expansion valve
Troubleshooting
When F17 indication happens.
Check the system wiring connection.
Is the wiring connection ok?
Check the indoor intake air and indoor pipe temperature
sensors.
Does it conform to the sensor characteristic chart?
Check the expansion valve.
Is the expansion valve ok?
YES
YES
NO
73
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
Caution
connect the component.
NO
Perform Auto Wiring to correct the wiring
connection.
Replace the indoor intake air or indoor pipe
NO
temperature sensor.
YES
Replace the solenoid coil or expansion
valve.
Replace outdoor unit PCB.