LG Wm2688hm Service Manual

							20
SYMPTOM                            GUIDE FOR SERVICE CALL
Suds overflow from the
appliance.
(In this condition, wash and 
spin do not operate normally)
YES
YES
YES
YES
405&/&3 .9
Is a HE (High Efficiency) detergent used?
Is the proper amount of detergent used 
as recommended?
Recommend to reduce the amount 
of detergent.
Is liquid laundry product put in the correct
compartment of the  dispenser?
Is the cap clogged?
Explain proper use of liquid laundry products.
Clean the compartment.   Visit to service. 
I
This appliance has an automatic suds sensing function which
prevents overflow.
I
 When excessive suds are sensed, the suds removing
implementations such as drain, water input, pause will operate,
without rotating the drum.
Liquid laundry products do not
flow in.  
						

							21
NO
YES
YES
YES
YESNO
NO
NO
NO
YES
Connector
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
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  
						

							22
YES
YES
YESNO
NO
Unbalance Part
Base Packing
Level
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.   
						

							23
NO
YES
NO
NO
YES NO
YES
YES
NO
NO
YES
YES
YES NO
NO
NO
YES
405&/&3 .9
5
4
\bleach
\bleach
Steam
Steam
Is water supply shut-off?
Is the tap opened?
When you press both 
WASH/RINSEbutton and
SOIL LEVEL 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 
G) NO WATER SUPPLY G*
Check the wiring.
Put the detergent in the
correct place. 
Clean the dispenser.
NO WATER SUPPLY
DETERGENT DOES NOT FLOW IN  
						

							24
Softener
cap
Liquid detergent cap
405&/&3 .9
405&/&3.9
Bleach capSOFTENER
Bleach
Steam
ABNORMAL SOUND
LIQUID DETERGENT/SOFTENER/BLEACH DOES NOT FLOW IN
Secure the bolt.
Replace the STATOR
ASSEMBLY or ROTOR
ASSEMBLY. Refer to
G) NO WATER SUPPLYG*
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?  
						

							25
NO
YES
YES
YES
YES
NO
NO
NO
NO YES
YES
NO
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
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 SOIL LEVEL at the
same time after draining, is  the water level frequency
255?  
When pressing WASH/RINSE and SOIL LEVEL
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
and 
SOIL LEVEL at the same time
SB SB
BL
YL BL
BL
YL
WHWH WH
WH WH
SB
RD
RD
BL
RD YL BK
BKWH
SB
SB SB
BL
YL BL
BL
YL
WHWH WH
WH WH
SB
RD
RD
BLRD YL BK
BKWH
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
***
***
***
***
***
***
***
***
***
***
***
***
***  
						

							27
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Connector
Connector
Hose Connector
(Water circulation & Steam Nozzle)
Hose
SB SB
BL
YL BL
BL
YL
WHWH WH
WH WH
SB
RD
RD
BLRD YL BK
BK WH
SB
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.  
						

							28
(1)(2)
SB SB
BL
YL BL
BL
YL
WHWH WH
WH WH
SB
RD
RD
BLRD YL BK
BKWH
SB
SB SB
BL
YL BL
BL
YL
WHWH WH
WH WH
SB
RD
RD
BLRD YL BK
BKWH
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: 
H
						

							29
9. DISASSEMBLY INSTRUCTIONS
DISPLAY PW\b ASSEM\bLY
TOP PLATE ASSEM\bLY
CONTROL PANEL ASSEM\bLY
DRAWER
CONTROL PANEL ASSEM\bLY
$0/530-
1/&-
44&.#-:
I
Be sure to unplug the machine out of the outlet before disassembling and\
 repairing the parts.