5.3 TROUBLESHOOTING GUIDE
In general, possible trouble is classified in two causes.
The one is called Starting Failure which is caused from an electrical defect, and the other is Ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application.
Unit is running but 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
Correct above trouble
Check clogging in refrigeration circuit.
Repair clogging in refrigeration circuit.
Check of outdoor coil (heat exchanger) & the 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 ; 44.6~50˚F
Check heat load increase.
Unexpected residue
Overloaded Circuit
Check of inside gas pressure.
Adjusting of refrigerant charge
Malfunction of compressor
Replacement of compressor
