LG BWC076GBAA0 Service Manual page 18

COMPLAINT
Fan motor will not run.
Fan motor runs
intermittently
Fan motor noise.
Compressor will not run,
but fan motor runs.
CAUSE
No power
Power supply cord
Rotary switch
Wire disconnected or
connection loose
Capacitor (Discharge
capacitor before testing.)
Will not rotate
Revolves on overload.
Grommets
Fan
Blower
Loose set screw
Worn bearings
Voltage
Wiring
—18—
REMEDY
Check voltage at outlet. Correct if none.
Check voltage to rotary switch. If none, check
power supply cord. Replace cord if circuit is open.
Check switch continuity. Refer to wiring diagram
for terminal identification. Replace switch if defective.
Connect wire. Refer to wiring diagram for terminal
identification. Repair or replace loose terminal.
Test capacitor.
Replace if not within ±10% of manufacturer's
rating. Replace if shorted, open, or damaged.
Fan blade hitting shroud or blower wheel hitting
scroll. Realign assembly.
Units using slinger ring condenser fans must
have 1 / to 5 / inch clearance to the base. If it is
4 16
hitting the base, shim up the bottom of the fan
motor with mounting screw(s).
Check fan motor bearings; if motor shaft will not
rotate, replace the motor.
Check voltage. See limits on this page. If not within
limits, call an electrician.
Test capacitor.
Check bearings. Does the fan blade rotate freely?
If not, replace fan motor.
Pay attention to any change from high speed to
low speed. If the speed does not change, replace
the motor.
Check grommets; if worn or missing, replace them.
If cracked, out of balance, or partially missing,
replace it.
If cracked, out of balance, or partially missing,
replace it.
Tighten it.
If knocking sounds continue when running or loose,
replace the motor. If the motor hums or noise
appears to be internal while running, replace motor.
Check voltage. See the limits on the preceeding
page. If not within limits, call an electrician.
Check the wire connections, if loose, repair or
replace the terminal. If wires are off, refer to wiring
diagram for identification, and replace. Check wire
locations. If not per wiring diagram, correct.