Friedrich CP12F10 Service And Parts Manual page 25

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