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, and the other is ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application.
Unit runs but poor cooling.
Ineffective Cooling
Check cold air circulation for smooth flow.
Dirty indoor coil (Heat exchanger)
Malfunction of fan
Clogged of air filter.
Obstruction at air outlet
Correct above problem
Check clogging in refrigera- tion system.
Repair clogging in refrigera- tion system.
Check outdoor coil
(heat exchanger) & the fan operation.
Check gas leakage.
Repair gas leak.
Replace 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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