LG Wm2487h M Service Manual

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Is the supplied voltage 120 V AC?
Is the voltage between the 2 FILTER ASSEMBLY
connectors 120 V AC?
Is the LED (1) on?
Are the connectors (2) on the PWB loose?
Is wire of the DISPLAY PWB ASSEMBLY  
broken?
Replace  DISPLAY PWB ASSEMBLY 
or repair wire. Check the fuse or reset
the circuit breaker.
Replace the FILTER
ASSEMBLY (CIRC).
Replace MAIN PWB
ASSEMBLY.
Reconnect.
Replace the MAIN PWB
ASSEMBLY.
NO POWER
8-2. FAULT DIAGNOSIS AND TROUBLESHOOTING
1. Be careful of electric shock if disconnecting parts while troubleshoo\
ting.
2. First of all, check the connection of each electrical terminal with t\
he wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.
CAUTION 
						

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Tighten
Tighten
Have all the transit bolts and base packing
been removed? Remove the transit bolts
and Base packing.
Move the washer or
reinforce the floor.
Is the washer installed on a solidly constructed
floor?
Check if the washer is perfectly level as follows:
Check the leveling of the washer with a Level
and check that the washer is stable.
Put an unbalance part (rubber) inside of drum
and start QC test mode and run in high spin
(Refer to section 7-2). 
When the machine is spinning in high speed,
verify that it is stable.
VIBRATION & NOISE IN SPIN
If it is not stable, adjust feet accordingly. After
the washer is level, tighten the lock nuts up
against of the base of the washer. All lock nuts
must be tightened. If you do not have the unbalance part, put 4.5 to
6.5 lbs (2 to 3 kg) of clothing. Once loaded,
press power, Rinse+Spin and the start/pause
button in sequence.
When the machine is spinning in high speed,
verify that it is stable.  
						

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NO
YES
NO
NO
YES NO
YES
YES
NO
NO
YES
YES
YES NO
NO
NO
YES
SOFTENER MAX
5
4
Bleach
Bleach
Steam
Steam
Is water supply shut-off?
Is the tap opened?
When you press both 
WASH/RINSEbutton and
DELAY WASH button simultaneously, is the water
level frequency below 246?
Is the inlet valve filter clogged?
Is resistance between each terminal of INLET
VALVE ASSEMBLY 0.8-1.2 
k Ω? 
Verify the voltage of the inlet valve connector is 
120 V AC.
(Refer to 7-2 QC TEST MODE)
Is water supplied?
Are receptacles correctly connected to the
terminals of the INLET VALVE ASSEMBLY?
Has detergent been put in the correct compartment
of the dispenser?
Is the detergent caked or hardened? Open the tap.
Check the 
AIR CHAMBER
and the tube (clogged). 
Clean the filter.
Replace the INLET VALVE
ASSEMBLY.
Check electrical connection.
Replace the MAIN PWB
ASSEMBLY.
Refer to 
NO WATER SUPPLY
Check the wiring.
Put the detergent in the
correct place. 
Clean the dispenser.
NO WATER SUPPLY
DETERGENT DOES NOT FLOW IN 
						

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SOFTENER MAX
SOFTENERMAX
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ABNORMAL SOUND
LIQUID DETERGENT/SOFTENER/BLEACH DOES NOT FLOW IN
Secure the bolt.
Replace the STATOR
ASSEMBLY or ROTOR
ASSEMBLY. Refer to
NO WATER SUPPLY
Check the wiring on the 
dispenser.
Put it in the correct
compartment.
Clean the Cap and
Container.
Is the motor bolt loosened?
Is there friction noise coming from the motor? Is water supplied?
Are the plugs correctly connected to the terminals of
the INLET VALVE ASSEMBLY?
Is liquid detergent/softener/bleach put in the correct
compartment of the drawer?
Is the liquid detergent/softener/bleach cap clogged? 
						

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Replace the
SENSOR SWITCH
ASSEMBLY.
Replace the MAIN PWB
ASSEMBLY.
Repair the DRAIN HOSE 
ASSEMBLY.
Remove foreign material.
Reconnect or repair the
connector
Replace the DRAIN
PUMP ASSEMBLY.
Replace the MAIN PWB 
ASSEMBLY.
Whenpressing WASH/RINSE and DELAY WASH at the
same time after draining, is  the water level frequency
255?  
When pressing WASH/RINSE and DELAY WASH
buttons at the same time while washing, is the water
level frequency between 230 - 243 ?
Check the voltage between two pins while pressing
the POWER button. Is the voltage  120 V AC?
Is the drain hose twisted or frozen?
Is the impeller of the drain pump clogged?
Is the connector disconnected, disassembled?
Is the coil of the drain pump too high or low?
(resistance of the coil is 10-20  Ω)
When checking voltage between connectors during
spin, is the voltage 120 V AC as in the figure? 
HEATING WITHOUT WATER
DRAIN MALFUNCTION 
						

							26
(1)
Extra Hot: 70 °C
EXTRA RINSE at the same time,DELAY WASH and
SB SB
BL
YL BL
BL
YL
WHWH WH
WH WH
SB
RD
RD
BL
RD YL BK
BK WH
SB
SB SB
BL
YL BL
BL
YL
WHWH WH
WH WH
SB
RD
RD
BLRD YL BK
BK WH
SB
Push the THERMISTOR
tightly to the rubber.
Replace the
Heater Assembly
When checking the THERMISTOR on the tub, 
is the THERMISTOR loose?
Water Temperature [°C]
HEATING CONTINUOUSLY ABOVE 
THE SETTING WATER TEMPERATURE WASH HEATER TROUBLE 
						

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WILL NOT CIRCULATE WATER
Is the impeller of the drain pump clogged?
Are the Hose Connector and/or Hose clogged?
Is the connector disconnected, disassembled?
Is the coil of the right side of drain pump open
or short circuited? (Coil R is 18-30 
Ω)
When checking voltage between the 
connectors during spin, is the voltage 120 V AC,
as the figure? Remove foreign material.
Remove foreign material.
Reconnect or repair 
the connector.
Replace PUMP MOTOR
ASSEMBLY.
Replace the MAIN PWB
ASSEMBLY. 
						

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(1)(2)
SB SB
BL
YL BL
BL
YL
WHWH WH
WH WH
SB
RD
RD
BLRD YL BK
BK WH
SB
SB SB
BL
YL BL
BL
YL
WHWH WH
WH WH
SB
RD
RD
BLRD YL BK
BK WH
SB
SPIN TROUBLE
Check the SENSOR SWITCH
ASSEMBLY or HOSE (Pressure). 
If the problem is on the SENSOR
SWITCH ASSEMBLY or the
HOSE, replace the SENSOR
SWITCH ASSEMBLY or the
HOSE.
Normal
Correct the connection.
Replace the STATOR
ASSEMBLY
Check during spin if the frequency of the water
level is 248 or more. 
Press the  
START/PAUSE button 2 times in QC
Test mode, is the drum spinning at low speed?
Is it disconnected, or disassembled?
[Red: 3pin (1), NA: 4pin (2)]
Check the motor connector, Is the resistance of
the terminal the same as the figure?
MOTOR TERMINAL
Resistance of terminal: 
①-② /②-③ /③ -①About 5 Ω15  Ω
Replace the MAIN PWB ASSEMBLY
Does the spring of Latch Hook actuate?
Is there clicking sound once or twice when the
START / PAUSE button is pressed to start the cycle?
Is DOOR SWITCH ASSEMBLY broken? Replace Door Assembly.
Check the DOOR SWITCH
ASSEMBLY Connector and
MAIN PWB ASSEMBLY
(Red 3 pin, Yellow 4 pin and
white 3 pin connector (1)).
Replace the DOOR
SWITCH ASSEMBLY.
③②① 
						

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9. DISASSEMBLY INSTRUCTIONS
DISPLAY PWB ASSEMBLY
TOP PLATE ASSEMBLY
CONTROL PANEL ASSEMBLY
DRAWER
CONTROL PANEL ASSEMBLY
CONTROLPANELASSEMBLY
Be sure to unplug the machine out of the outlet before disassembling and\
 repairing the parts. 
Unscrew 2 screws on the back of the top plate.
Pull the top plate backward and upward as shown.
Disconnect the Display PWB Assembly connector
from Trans cable.
Pull out the drawer and unscrew 2 screws.
Taking out 1 screw.
Lift the side the Control Panel Assembly and 
pull it out 
Unscrew the 8 screws from the Control Panel Assembly.
Disassemble the Display PWB Assembly. 
						

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Disconnect the POWER connector and SENSORSWITCH ASSEMBLY.
Remove the Protect Cover.
Disconnect the connectors.
Unscrew 1 screw on the back.
Disassemble the Main PWB.
PROTECT COVER
MAINPWBASSEMBLY