Haier HC60A1VAR Installation & Operation Manual page 15

Symptom Possible Cause
Power off or loose electrical connection
Incorrect thermostat setting
No cooling Defective contactor
Open circuit breaker of blown fuses
Defective transformer
Interconnecting low voltage wiring damage Replace thermostat wiring
Dirty filters
Indoor air blockage
Blocked outdoor coil
Improperly sized unit
Insufficient Cooling Improper airflow
Incorrect refrigerant charge
Air, non-condensibles or moisture in system Recover refrigerant, evacuate & recharge, add filter drier
Incorrect voltage
Water on floor or in
furnace Blocked condensate drain and "P" trap
Run or start capacitor defective
Loose connection
Condenser fan runs, Compressor stuck, grounded or open
compressor doesn't motor winding, open internal overload
Low voltage condition
Low voltage condition
Incorrect voltage
Compressor
short-cycling Defective overload protector
Refrigerant undercharge
Register sweat Low evaporator airflow
Restriction in liquid line,
High head - Low metering device or filter drier
vapor pressures Flowrator piston size too small
Incorrect capillary tubes
Blocked outdoor coil
High head - High Refrigerant overcharge
or normal vapor Condenser fan not running
pressures Air, non-condensibles or
moisture in system
Low head - High Flowrator piston size too large
vapor pressures Defective compressor valves
Incorrect capillary tubes
Low vapor - cool Low evaporator airflow
compressor - iced Operating below 65 F outdoors
evaporator coil Moisture in the system
High vapor Excessive load
pressure Defective compressor
Fluctuating head Air or non-condensibles in system
and vapor pressures
Pulsing noise at Air or non-condensibles in system
metering device
or liquid line
Remedy
Make sure main switch is ON. Check and tighten all connections.
Set thermostat correctly
Check for 24V at contactor coil.
Reset or replace
Check wiring - Replace it.
Clean & replace
Check supply registers and return grills for blockage.
Clear away leaves and other debris
Recalculate load
Check - should be 400CFM/Ton
Charge correctly per instruction.
At compressor terminals, voltage must be within
10% of rating plate volts when unit is running.
Remove blockage
Replace
Check and tighten all connections.
Wait for 2 hours for overload to reset.
Replace compressor if still open.
At compressor terminals, voltage must be within 10% of rating
plate volts when unit is running.
Add start kit components
At compressor terminals, voltage must be within 10% of rating
plate volts when unit is running.
Replace - check for correct voltage
Add refrigerant
Increase blower speed or reduce restriction - replace air filter
Replace defective components
Change to correct size piston
Change coil assembly
Clear away leaves and other debris
Correct system charge
Repair or replace
Recover refrigerant, evacuate &
recharge, add filter drier
Change to correct size piston
Replace compressor
Replace coil assembly
Increase blower speed or reduce restriction - replace air filter
Add low ambient kit
Recover refrigerant, evacuate & recharge, add filter drier
Recheck load calculation
Replace
Recover refrigerant, evacuate & recharge.
Recover refrigerant, evacuate & recharge
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