4.3 TROUBLESHOOTING GUIDE
In general, possible trouble is classified in two kinds.
The one is called Starting Failure which is caused from an electrical defect. The other is Ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application.
Unit runs but poor cooling is ineffective.
Ineffective Cooling
Check of cold air circulation for smooth flow.
Dirty indoor coil (Heat exchanger)
Malfunction of fan
Clogged of air filter
Obstruction at air outlet
Remove obstruction.
Check clogging in refrigeration circuit.
Repair clogging in refrigeration circuit.
Check of outdoor coil (heat exchanger) & fan operation.
Check gas leakage.
Repair gas leak.
Replacement of unit if the unit is beyond repair.
Satisfactory operation with temperature difference of inlet & outlet air ; 44~50° F(7~10° C)
Check heat load increase.
Clean condenser.
Not on separate circuit
Check inside gas pressure.
Adjusting of refrigerant charge
Malfunction of compressor
Replacement of compressor
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