Common Faults And Troubleshooting - Haier CA0035EAND Installation And Operation Manua

Maintenance
■

Common Faults and Troubleshooting

S/N Fault description Possible cause
1.
the system
2.
3.
4.
5.
Too high
of the condenser
1 exhaust
6.
pressure
7.
8.
9.
or with foreign matters inside
10. High outlet temperature of
water-side heat exchanger
1.
2.
3.
4.
water side
Low suction
5.
2
pressure
or with foreign matters inside
6.
7.
8.
1.
2.
Too low exhaust
3.
3
pressure
heat exchanger
4.
side
1.
2.
4 water side
High suction
pressure
3.
air-side heat exchanger
1.
Overtemperature
2.
of exhaust
5
temperature
3.
sensor
4.
no frosting
Open circuit or 1.
short circuit of
6
temperature
2.
sensor
1.
2.
7 Abnormal noise
refrigerant into the compressor
3.
Air or non-condensable gas found in
High suction pressure
Undesirable high-pressure switch
Dirty or clogged fin of the condenser Clean the air-side heat exchanger
Insufficient air capacity or faulty fan
High charge of refrigerant
High ambient temperature
Insufficient water flow
Water-side heat exchanger scaling
Insufficient refrigerant
Undesirable low-pressure switch
Insufficient water flow
Low water inlet temperature at
Water-side heat exchanger scaling
Insufficient air capacity
Short circuit found in air circuit
Incomplete defrosting
Lack of refrigerant
Low suction pressure
Low ambient temperature of air-side
Too low water temperature at water
Too high charge of refrigerant
High water inlet temperature at
High ambient temperature of
Poor ventilation around the unit
Too low ambient temperature
Dirty or clogged filter at fluorine side Replace the filter
Incomplete frosting (for heating) or
Damaged sensor
Poor connection of sensor
Loose metal plate bolts
Liquid impact due to entry of liquid
Poor compressor
Troubleshooting
Discharge and empty, if necessary,
the non-condensable gas
Refer to "High Suction Pressure"
Replace the high-pressure switch
Check the fan
Adjust the charge of refrigerant
Inspect the ambient temperature
Check the water flow
Clean up the incrustation scale
Check the water temperature
Adjust the charge of refrigerant
Replace the low-pressure switch
Check the water flow
Check the water temperature
Clean up the incrustation scale
Check the fan
Check the cause of short circuit and
take troubleshooting
Replace the poor 4-way valve or
defrosting sensor
Adjust the charge of refrigerant
Refer to "Low Suction Pressure"
Check the ambient temperature
Check the water temperature
Adjust the charge of refrigerant
Check the water temperature
Check the ambient temperature
Clean up the obstacles around the
unit, or add air ducts
Shut down
Change the frosting parameters
Replace the sensor
Reconnect the sensor
Retighten bolts
Adjust the charge of refrigerant or the
poor throttling device
Replace the compressor
21
Remarks
Cooling/heating
Cooling/heating
Cooling/heating
Cooling
Cooling
Cooling
Cooling
Heating
Heating
Heating
Cooling/heating
Cooling/heating
Cooling
Cooling
Cooling
Heating
Heating
Heating
Cooling/heating
Cooling/heating
Cooling
Heating
Cooling/heating
Cooling
Heating
Heating
Heating
Cooling/heating
Heating
Cooling/heating
Cooling/heating