LG BWC076GBAA0 Service Manual page 19

COMPLAINT
Compressor will not run,
but fan motor runs.
Compressor cycles
on overload.
Compressor cycles on
overload (Cont'd)
Insufficient cooling.
Excessive noise.
CAUSE
Rotary
Thermostat
Capacitor (Discharge
capacitor before
servicing.)
Compressor
Overload
Voltage
Overload
Fan motor
Condenser air flow
restriction
Condenser fins (damaged)
Capacitor
Wiring
Refrigerating system
Air filter
Exhaust damper door
Unit undersized
Blower or fan
Copper tubing
Check for continuity, refer to the wiring diagram for
terminal identification. Replace the switch if circuit is
open.
Check the position of knob If not at the coldest
setting, advance the knob to this setting and restart
unit.
Check continuity of the thermostat. Replac thermostat
if circuit is open.
Check the capacitor.
Replace if not within ±10% of manufacturers rating.
Replace if shorted, open, or damaged.
Check the compressor for open circuit or ground. If
open or grounded, replace the compressor.
Check overload if the compressor temperature is
high, cool, and retest.(If not running, replace the
compressor.)
Check the voltage. See the limits on the preced-
ing page. If not within limits, call an electrician.
Check overload if the compressor temperature
is high, cool, and retest.(If not running, replace the
compressor.)
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 reassembling.
If 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 capacitor.
Check the terminals. If loose, repair or replace.
Check the system for a restriction.
If restricted, clean of replace.
Close if open.
Determine if the unit is properly sized for the area to
be cooled.
Check the set screw or clamp. If loose or missing,
correct.
If the blower or fan is hitting air guide, rearrange the
air handling parts.
Remove the cabinet and carefully rearrange tubing
not to contact cabinet, compressor, shroud, and
barrier.
—19—
REMEDY