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©
2023
Handbook
Fault State
Cause Analysis
Air conditioning not cool
or dehumidify
Aluminum foil fin blocked / fan not working / compressor not
working / refrigerant leakage
Compressor not start
Line voltage too low(It should be within ± 10 % range of the rated
voltage) /Overload protection switch damage / compressor stalling
Circuit breaker burnout
Too small circuit breaker / fuse or no interval time/ line short circuit
Water ingress into the
cabinet
Drainage blockage / drainage pipe knot / cabinet no seal / gasket damage
Evaporator freezing
1. Internal air circulation short circuit ;
2. Cabinet air inlet or outlet poor ;
3. Internal fan failure ;
4. Refrigeration system can not be closed ;
5. Evaporator middle part temperature
sensor false alarm.
High humidity in cabinet
1. Excessive environmental humidity;
2. Dehumidification system failure;
3. Cabinet humidity sensor false alarm.
Heater break
Heater break
High temperature in
the cabinet
1. Condenser blockage or scaling;
2. Excessive ambient temperature;
3. Failure of the refrigeration system;
4. Large heat dissipation equipment within cabinet;
5. Inappropriate temperature setting;
6. In-cabinet temperature sensor false alarm
Sensor break Sensor damage, breakdown or short circuit/sensor damage
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8.
Fault Diagnosis
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