PROBABLE CAUSE
CORRECTIVE ACTION
SYMPTOM
6. Unit operates long or
Shortage of refrigerant.
Fix leak; add refrigerant.
continuously.
Control contacts stuck or
Clean contacts or replace
frozen.
control.
Refrigerated or air-
Determine fault and
conditioned space has
correct.
excessive heat load or
poor insulation.
Defrost. Check defrost
circuit.
Restriction in refrigeration
Determine location and
system.
remove.
Filter dirty.
Clean or replace filter.
Run capacitor open,
Replace capacitor.
shorted, or blown.
Excessively high line
Determine reason and
voltage (110% of rated
correct.
maximum).
Incorrect run capacitor.
Replace with proper
capacitor.
Clean contacts and
open properly.
replace relay, if required.
MD0367
A-4