23
PROBLEM
CAUSE
REMEDY
Unit does not run.
□
Blown Fuse.
□
Circuit breaker tripped.
□
No electrical supply.
□
Main power switched off.
□
Replace proper fuse.
□
Reset the breaker.
□
Switch ON the power supply.
Compressor and condenser fan
not working.
□
Power failure.
□
Fuse blown or circuit breaker
tripped.
□
Defective thermostat, contactor,
transformer or control relay.
□ Insufficient line voltage.
□
Incorrect or faulty wiring.
□
Thermostat setting is not correct.
□
Call power distributor.
□
Replace fuse or reset circuit
breaker.
□
Replace component.
□
Call power distributor.
□
Rewire as per wiring diagram.
□
Do the correct setting.
Compressor not working but
condenser fan working.
□
Faulty wiring or loose connections.
□
Compressor circuit.
□
Compressor faulty.
□
Defective compressor run/start
capacitor, overload relay fault.
□
Three phase supply failure.
□
Check wiring and do repair or
replace.
□
Replace compressor.
□
Replace fault component.
□
Call power distributor.
Compressor ON/OFF cycle is
too short (other than normal
thermostat cut off).
□
Refrigerant over charge or under
charge.
□ Defective compressor. Insufficient
line voltage.
□
Blocked condenser.
□
Defective run/start capacitor,
overload, start, relay, defective
thermostat, fault condenser fan
motor or capacitor.
□
Obstructions in refrigerant system.
□
Reclaim refrigerant, evacuate and
recharge as on nameplate.
□
Replace compressor.
□
Call power distributor.
□
Determine cause and correct.
□
Replace fault component.
□
Locate obstructions and remove.
Compressor operates
continuously.
□ Dirty air filter.
□ Unit undersized for load.
□
Thermostat set too low.
□
Low refrigerant charge.
□
Condenser coil dirty or blocked.
□ Replace filter.
□ Decrease load or increase unit size.
□
Reset thermostat.
□
Locate leak and repair and
recharge.
□
Clean coil or remove obstructions.
Excessive head pressure.
□ Dirty air filter.
□
Dirty condenser coil.
□
Refrigerant over charged.
□
Air in system.
□
Condenser air obstructed or air
short cycling.
□ Replace air filter.
□
Clean coil.
□
Reclaim excess refrigerant.
□
Reclaim gas, evacuate & recharge.
□
Determine cause and correct.
Headpressuretoo low.
□
Low refrigerant charge.
□
Compressor valves leaking.
□
Restriction in liquid tube.
□
Check for leaks, repair and
recharge.
□
Replace compressor.
Excessive suction pressure.
□
High head load.
□
Compressor valves leaking.
□
Refrigerant over charged.
□
Check for cause and eliminate.
□
Replace compressor.
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Reclaim excess refrigerant.
Trouble Shooting
