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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 by an electrical defect. The other is Ineffective Air Con-
ditioning caused by a defect in the refrigeration circuit and improper application.
Unit is running but cooling is ineffective.
Check cold air
circulation for smooth
flow.
Dirty indoor coil
(heat exchanger)
Malfunction of fan.
Clogging of air filter.
Obstruction at air outlet.
Remove obstruction.
Check clogging in refrigera-
tion circuit.
Repair clogging in
refrigeration 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; 55~59°F (13~15°C)
—18—
Check heat load
increase.
Clean condenser.
Not on separate circuit
Check inside gas
pressure.
Adjust refrigerant
charge.
Malfunction of
compressor.
Replacement of
compressor.
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Table of Contents
Troubleshooting
