LG LWC1262ACG / R1000 / R-1000 / R1200 / R-1200 / R1201H Service Manual ▷ View online
—20—
Fails to Start
Check circuit breaker
and fuse.
and fuse.
Gas leakage of feeler bulb
of thermostat
of thermostat
Check of control switch.
Fan only 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
Compressor only fails to
start.
start.
Defect of compressor
capacitor.
capacitor.
Check of power source.
Check of control switch
setting.
setting.
—21—
COMPLAINT
CAUSE
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.
supply cord. Replace cord if circuit is open.
Check switch continuity. Refer to wiring diagram for
terminal identification. Replace switch if defective.
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 for condenser fan must have
1
/
4
to
5
/
16
inch clearance to the base. If it hits the
base, shim up the bottom of the fan motor with
mounting screw(s).
mounting screw(s).
Check fan motor bearings; if motor shaft will not
rotate, replace the motor.
rotate, replace the motor.
Check voltage. If not within 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.
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.
replace the motor. If the motor hums or noise
appears to be internal while running, replace motor.
Check voltage.
If not within limits, call an electrician.
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.
terminal identification. Replace the switch if circuit is
open.
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.
Fan
Blower
Loose clamper
Worn bearings
Voltage
Wiring
Rotary
Fan motor will not run.
Fan motor runs
intermittently
intermittently
Fan motor noise.
Compressor will not run,
but fan motor runs.
but fan motor runs.
—22—
COMPLAINT
CAUSE
REMEDY
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.
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.
If not within limits, call an electrician.
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.
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 overload. Straighten the fins or
replace the coil.
coil surface, head pressures will increase, causing
the compressor to overload. 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.
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.
correct. If the blower or fan is hitting air guide,
rearrange the air handling parts.
Remove the cabinet carefully and rearrange tubing
not to contact cabinet, compressor, shroud, and
barrier.
not to contact cabinet, compressor, shroud, and
barrier.
Thermostat
Capacitor (Discharge
capacitor before servicing.)
capacitor before servicing.)
Compressor
Overload
Voltage
Overload
Fan motor
Condenser air flow
restriction
restriction
Condenser fins (damaged)
Capacitor
Wiring
Refrigerating system
Air filter
Exhaust damper door
Unit undersized
Blower or fan
Copper tubing
Compressor will not run,
but fan motor runs.
but fan motor runs.
Compressor cycles on
overload.
overload.
Compressor cycles on
overload.
overload.
Compressor cycles on
overload.
overload.
Insufficient cooling or
heating
Excessive noise
5. SCHEMATIC DIAGRAM
5.1 CIRCUIT DIAGRAM
• MODEL : R1000, R-1000, R1200, R-1200
—23—
1
3
6
4
8
2
7
5
MOTOR
COMP.
BR(YL)
P.T.C
S: Service Parts
N: Non Service Parts
N: Non Service Parts
R1000/R-1000
R1200/R-1200
PART NO.
2H00677R
2H00677S
2H00508E
4681A20009L
4681A20009K
6120AR2194K
2H01109L
6750U-L049A
6750U-L029A
5416A20012B
5416A20012C
6748U-L001B
POWER CORD
ROTARY SWITCH
FAN MOTOR
CAPACITOR
THERMOSTAT
OVERLOAD PROTECTOR
COMPRESSOR
PTC
1
2
3
4
5
6
7
8
1
1
1
1
1
1
1
1
S
S
S
S
S
S
S
S
LOCATION
NO.
DESCRIPTION
RE-
MARKS
Q'TY
PER SET
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