CORRECTIVE ACTION
PROBABLE CAUSE
SYMPTOM
4. (Compressor starts and Suction pressure too high.
Check refrigeration cycle.
runs, but short cycles on
overload protector--
Compressor motor has a
Replace compressor.
Continued)
winding shorted.
Excessive current passing
Check wiring diagram;
through overload
check possible incorrect
protector.
connection of fan motors,
lamps, or heater, and
correct.
5. Unit runs ok, but short
Overload protector.
Replace defective
cycles.
protector.
Thermostat.
Adjust differential.
High pressure cut-out due
Check air supply to
to insufficient circulation.
problem.
High pressure cut-out due
Reduce charge.
to refrigerant overcharge.
High pressure cut-out due
Purge air from system;
to air in system.
add refrigerant, as
required.
Low pressure cut-out due
Repair line.
leaking.
Low pressure cut-out due
Replace valve.
Low pressure cut-out due
Fix leak, add refrigerant.
to undercharge.
Low pressure cut-out due
Replace device.
to restriction in expansion
device.
MD0367
A-3