LG LW-E1860HL / LW-D1831CN / LW-D1834CN Service Manual ▷ View online
—16—
Fails to Start
Check of circuit breaker
and fuse.
and fuse.
Gas leakage of feeler bulb
of thermostat.
of thermostat.
Check of control switch.
Only fan fails to start.
Improper wiring.
Defect of fan motor
capacitor.
capacitor.
Irregular motor resistance
( ).
Irregular motor insulation
( ).
( ).
Irregular motor insulation
( ).
Replacement of fan motor.
Regular but fails to start.
Replacement of compressor
(locking of rotor, metal).
(locking of rotor, metal).
Improper thermostat setting.
Loose terminal connection.
Improper wiring.
Irregular motor resistance ( )
Irregular motor insulation ( )
Replacement of compressor
(Motor damaged).
(Motor damaged).
Drop of power voltage.
Capacitor check.
Replacement.
Only compressor fails to
start.
start.
Defect of compressor
capacitor.
capacitor.
Check of power source.
Check of control switch
setting.
setting.
—17—
COMPLAINT
CAUSE
REMEDY
Check voltage at outlet. Correct if none.
Check voltage to retary switch. If none, check
power supply cord. Replace cord if circuit is open.
power supply cord. Replace cord if circuit is open.
Check switch continuity. Refer to wiring diagram
for terminal identification. Replace switch if
defective.
for terminal identification. Replace switch if
defective.
Connect wire. Refer to wiring diagram for terminal
identification. Repair or replace loose terminal.
identification. Repair or replace loose terminal.
Test capacitor.
Replace if not within ±10% of manufacturer's
rating. Replace if shorted, open, or damaged.
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.
scroll. Realign assembly.
Units using slinger ring condenser fans must
have
have
1
/
4
to
5
/
6
inch clearance to the base. If it is
hitting the base, shim up the bottom of the fan
motor with mounting screw(s).
motor with mounting screw(s).
Check fan motor bearings; if motor shaft will not
rotate, replace the motor.
rotate, replace the motor.
Check voltage. See limits on this page. If not within
limits, call an electrician.
limits, call an electrician.
Test capacitor.
Check bearings. Does the fan blade rotate freely?
If not, replace fan motor.
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.
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.
replace it.
If cracked, out of balance, or partially missing,
replace it.
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.
loose, replace the motor. If the motor hums or
noise appears to be internal while running,
replace motor.
No power
Power supply cord
Rotary switch
Wire disconnected or
connection loose
connection loose
Capacitor (Discharge
capacitor before testing.)
capacitor before testing.)
Will not rotate
Revolves on overload.
Grommets
Fan
Blower
Loose set screw
Worn bearings
Fan motor will not run.
Fan motor runs
intermittently
intermittently
Fan motor noise.
—18—
COMPLAINT
CAUSE
REMEDY
Check voltage. See the limits on the preceding.
page. If not within limits, call an electrician.
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.
replace the terminal. If wires are off, refer to wiring
diagram for identification, and replace. Check wire
locations. If not per wiring diagram, correct.
Check for continuity, refer to the wiring diagram
for terminal identification. Replace the switch if
circuit is open.
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. Replace
thermostat if circuit is open.
setting, advance the knob to this setting and
restart unit.
Check continuity of the thermostat. Replace
thermostat if circuit is open.
Check the capacitor.
Replace if not within ±10% of manufacturers
rating. Replace if shorted, open, or damaged.
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.
ground. If open or grounded, replace the
compressor.
Check the compressor overload, if externally
mounted. Replace if open. (If the compressor
temperature is high, remove the overload, cool it,
and retest.)
mounted. Replace if open. (If the compressor
temperature is high, remove the overload, cool it,
and retest.)
Check the voltage. See the limits on the preced-
ing page. If not within limits, call an electrician.
ing page. If not within limits, call an electrician.
Check overload, if externally mounted.
Replace if open. (If the compressor temperature
is high, remove the overload, cool, and retest.)
Replace if open. (If the compressor temperature
is high, remove the overload, cool, and retest.)
If not running, determine the cause. Replace if
required.
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.
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.
on the coil surface, head pressures will increase,
causing the compressor to cycle. Straighten the
fins or replace the coil.
Voltage
Wiring
Rotary
Thermostat
Capacitor (Discharge
capacitor before
servicing.)
capacitor before
servicing.)
Compressor
Overload
Voltage
Overload
Fan motor
Condenser air flow
restriction
restriction
Condenser fins
(damaged)
(damaged)
Compressor will not run,
but fan motor runs.
but fan motor runs.
Compressor cycles
on overload.
on overload.
Compressor cycles on
overload (Cont'd)
overload (Cont'd)
—19—
COMPLAINT
CAUSE
REMEDY
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 scroll or barrier,
rearrange the air handling parts.
Remove the cabinet and carefully rearrange tubing
not to contact cabinet, compressor, shroud, and
Barrier.
Capacitor
Wiring
Refrigerating system
Air filter
Exhaust damper door
Unit undersized
Blower or fan
Copper tubing
Insufficient cooling or
heating
Excessive noise.
Click on the first or last page to see other LW-E1860HL / LW-D1831CN / LW-D1834CN service manuals if exist.