SYMPTOM DIAGNOSIS
For models - Single zone with cooling only
The displayed temperature is
higher than the set temperature.
1. Is the ambient temperature too high more than 35°C?
2. Is he ventilation blocked?
3. Is the fan motors failed?
4. Is the temperature sensor failed?
5. Is the cooling system failed?
The displayed temperature is
lower than the set temperature.
1. Is the ambient temperature lower than the set temperature? This
is normal.
For models - Single zone with cooling and heating
The displayed temperature is
higher than the set temperature.
1. Is the ambient temperature too high more than 35°C?
2. Is he ventilation blocked?
3. Is the fan motors failed?
4. Is the temperature sensor failed?
5. Is the cooling system failed?
The displayed temperature is
lower than the set temperature.
1. Is the evaporator fan motor failed?
2. Is the PTC heater failed?
3. Is the temperature sensor failed?
4. Is the Main PCB or Display PCB failed?
5. Is the ambient temperature too low less than 0°C? If so, it is
normal.
For models - Dual zone with single door
The displayed temperature is
higher than the set temperature
in the upper zone.
1. Is the ambient temperature too high more than 35°C?
2. Is he ventilation blocked?
3. Is the evaporate fan motor in the upper zone failed?
4. Is the condenser fan motor failed?
5. Is the temperature sensor failed?
6. Is the cooling system failed?
The displayed temperature is
lower than the set temperature in
the upper zone.
1. Is the lower zone temperature normal? Otherwise check the PTC
heater and fan motor in the lower zone.
2. Is the fan motor in the middle partition failed?
3. Is the temperature sensor failed?
4. Is the Main PCB or Display PCB failed?
5. Is the ambient temperature too low less than 0°C?
The displayed temperature is
higher than the set temperature
in the lower zone.
1. Is the upper zone temperature normal? Otherwise check the
upper zone problem firstly.
2. Is the fan motors in the middle partition failed?
3. Is the temperature sensor failed?
4. Is the ambient temperature too high more than 35°C?
The displayed temperature is
lower than the set temperature in
the lower zone.
1. Is fan motor failed?
2. Is the PTC heater failed?
3. Is the temperature sensor failed?
4. Is the Main PCB or Display PCB failed?
5. Is the ambient temperature too low less than 0°C?
The temperature in the upper
zone is normal but the displayed
1. Is the fan motor in the lower zone is failed?
2. Is the PTC heater failed?
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