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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.
Check 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 refrigera-
tion circuit.
Repair clogging in refrigera-
tion circuit.
Ineffective Cooling
Check outdoor coil
(heat exchanger) and 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)
—19—
Check heat load
increase.
Clean condenser.
Not on separate circuit.
Check inside gas
pressure.
Adjusting of refrigerant
charged.
Malfunction of compressor.
Replacement of
compressor.
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