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25 Room Air Conditioner
COMPLAINT CAUSE REMEDY
Compressor cycles on Voltage Check the voltage. See the limits on the
overload. preceding page. If voltage is not within these limits,
call an electrician.
Overload Check overload, if externally mounted.
Replace if open. (If the compressor temperature
is high, remove the overload, cool, and retest.)
Compressor cycles on Fan motor If not running, determine the cause. Replace if
overload. required.
Condenser air flow Remove the cabinet, inspect the interior surface
restriction of the condenser. If restricted, clean carefully
with a vacuum cleaner (do not damage fins) or
brush. Clean the interior base before
re-assembling.
Condenser fins If the condenser fins are closed over a large
(damaged) area on the coil surface, head pressures will
increase, causing the compressor to cycle.
Straighten the fins or replace the coil.
Capacitor Test the capacitor.
Wiring Check the terminals. If loose, repair or replace.
Refrigeration system Check the system for a restriction.
Insufficient cooling Air filter If restricted, clean or replace.
Unit undersized Determine if the unit is properly sized for the
area to be cooled.
Excessive noise Blower or fan Check the set screw, or clamp. If loose or miss-
ing, correct. If the blower or fan is hitting scroll
or barrier, rearrange the air handling parts.
Copper tubing Remove the cabinet and carefully rearrange the
tubing not to contact the cabinet,
compressor, shroud, and barrier.
Troubleshooting Guide