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15.5.20 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
When F17 indication happens.
For safety reason and to prevent component
breakdown, always switch off the power
before remove and connect the component.
NO
YES
YES
NO
YES
Perform Auto Wiring to correct the wiring
connection.
Replace the solenoid coil or expansion valve.
Replace outdoor unit PCB.
Is the wiring connection ok?
Check the system wiring connection.
Check the indoor intake air and indoor pipe temperature
sensors.
Is the expansion valve ok?
Does it conform to the sensor characteristic chart?
NO
Replace the indoor intake air or indoor pipe
temperature sensor.
Check the expansion valve.
Caution
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