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15.4.20 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?
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
pipe temperature sensor
valve
wiring connection
