Haier HW-12C03 Service Manual page 90

Troubleshooting Information
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit and discharge
capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures require power to be
connected. Ensure all ground wires are connected before certifying unit as repaired and/or operational.
Symptom
Wattage slowly decreases
below minimum
specification.
Wattage decreases
immediately.
Wattage continuously
high.
Evaporator coil partially
frosted.
Evaporator completely
iced.
Possible Causes
Undercharged, restricted
strainer or plugged
capillary tube.
No refrigerant.
Compressor failed.
Refrigerant overcharge.
System low on refrigerant.
Restricted capillary tube.
Insufficient air flow.
Failed fan motor
Low outside temperature.
Restricted capillary tube.
Insufficient air flow.
Thermostat not cycling.
WARNING
Corrective Action
Test sealed system for proper charge. Ensure system is
free of leaks/blockage. Repair as required. Evacuate/
recharge sealed system.
Test sealed system for proper charge. Ensure system is
free of leaks. Repair as required.
Check compressor motor windings for open/shorts.
Replace compressor if failed.
Test sealed system for proper charge. Repair as required.
Test sealed system for proper charge. Ensure system is
free of leaks. Repair as required.
Replace capillary tube.
Inspect air filter, indoor/outdoor coil for dirt. Clean as
required. Check fins on coils for damage. Straighten fins if
bent, attempt other repairs as necessary. Replace coil if
repairs cannot be made.
Check fan motor for proper operation. Replace if failed.
Turn unit off.(Consumer education)
Replace capillary tube.
Inspect air filter, indoor/outdoor coil for dirt. Clean as
required, Check fins on coils for damage. Straighten fins if
bent, attempt other repairs as necessary. Replace coil if
repairs cannot be made.
Replace Thermostat.
93
RS4110008 Rev.0