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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. The other isIneffective Air
Conditioning caused from a defect in the refrigeration circuitand improper application.
UNIT IS RUNNING BUT COOLING IS INEFFECTIVE.
Ineffective Cooling
circulationfor smooth
flow.
I Dirty indoor coil I
(heat exchanger)
I I
I Clogging of air filter. I
Obstruction at air outlet. I
Remove obstruction.
Check clogging in refrigera-
tion circuit.
Repair clogging in
refrigeration circuit,
1
Check outdoor coil I
I
(heat exchanger) and
I
fan operation,
I I
I Repair gas leak. I
Replacement of unit if {
I
the unit is beyond repair.
I
I 1
increase.
I Clean condenser. 1
I Not on separate circuit I
Check inside gas
pressure.
Adjust refrigerant
charge.
Malfunction of
compressor.
Replacement of
compressor.
Satisfactory operation
with temperature
difference of inlet & outlet
air; 44---50°F (7-10°C)
i
I
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