PROBABLE CAUSE
CORRECTIVE ACTION
SYMPTOM
3. Compressor starts, but
Low voltage to unit.
Troubleshoot electrical
does not switch off from
circuit and correct.
start winding.
Determine reason and
Run capacitor is defective.
Replace run capacitor.
Excessively high
Check discharge shut-off
discharge pressure.
valve for possible
overcharge or insufficient
Compressor motor has a
Replace compressor.
winding open or shorted.
Internal mechanical
Replace compressor.
trouble in compressor
(tight).
Improperly wired.
Check wiring against
diagram and repair.
Ensure the ventilation is
runs, but short cycles on pressure.
adequate and remove
overload protector.
restrictions in refrigeration
lines.
Low voltage to unit.
Troubleshoot electrical
circuit and correct.
Overload protector
Replace protector.
defective.
Run capacitor defective.
Replace capacitor.
Check refrigerant charge;
gas hot.
fix leak; add refrigerant as
required.
MD0367
A-2