Trouble Shooting - Haier CA0035EAND Service Manual

12. Trouble Shooting

Fault
S/N
description
1. Air or non-condensable gas found
in the system
2. High suction pressure
3. Undesirable high-pressure switch
4. Dirty or clogged fin of the
condenser
Too high
5. Insufficient air capacity or faulty
1 exhaust
fan of the condenser
pressure
6. High charge of refrigerant
7. High ambient temperature
8. Insufficient water flow
9. Water-side heat exchanger scaling
or with foreign matters inside
10. High outlet temperature of
water-side heat exchanger
1. Insufficient refrigerant
2. Undesirable low-pressure switch
3. Insufficient water flow
4. Low water inlet temperature at
water side
Low suction
2
pressure 5. Water-side heat exchanger scaling
or with foreign matters inside
6. Insufficient air capacity
7. Short circuit found in air circuit
8. Incomplete defrosting
1. Lack of refrigerant
2. Low suction pressure
Too low
3 exhaust
3. Low ambient temperature of
pressure
air-side heat exchanger
4. Too low water temperature at
water side
1. Too high charge of refrigerant
2. High water inlet temperature at
High suction
4
water side
pressure
3. High ambient temperature of
air-side heat exchanger
Possible cause
46
Troubleshooting
Discharge and empty, if necessary,
the non-condensable gas
Refer to "High Suction Pressure"
Replace the high-pressure switch
Clean the air-side heat exchanger
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
Remark
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