109
17.5.21 F17 (Indoor Standby Units Freezing Abnormality)
Malfunction Decision Conditions
When the different between indoor intake air temperature and indoor pipe temperature is above 10°C or indoor
pipe temperature is below -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
YES
YES
NO
When F17 indication happens
Check the system wiring connection.
Is the wiring connection ok?
●
Perform Auto Wiring to correct the
●
Replace the indoor intake air or indoor
NO
●
Replace the solenoid coil or expansion
YES
Check the indoor intake air and indoor pipe temperature
sensors.
Does it conform to the sensor characteristic chart?
Check the expansion valve
●
Replace outdoor unit PCB
NO
Is the expansion valve ok?
pipe temperature sensor.
valve
wiring connection.
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
Caution