LG WD-1238C User manual

WASHING MACHINE
SERVICE MANUAL
READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLE
CORRECTLY BEFORE OFFERING SERVICE.
website : http://www.LGEservice.com
e-mail : http://LGEservice.com/techsup.html
CAUTION
MODEL : WD-1238C

CONTENTS
1. SPECIFICATION............................................................................................................................3
2. FEATURES & TECHNICAL EXPLANATION ................................................................................ 4
3. PARTS IDENTIFICATION ............................................................................................................ 6
4. INSTALLATION............................................................................................................................. 7
5. OPERATION................................................................................................................................10
6. WIRING DIAGRAM PROGRAM CHART.....................................................................................12
7. TROUBLESHOOTING.................................................................................................................13
7-1.BEFORE PERFORMING SERVICE....................................................................................13
7-2.TEST MODE........................................................................................................................13
7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY.........................................................13
7-4.ERROR DISPLAY................................................................................................................14
8. ERROR DIAGNOSIS AND CHECK LIST....................................................................................15
8-1. DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION...........................................15
8-2. FAULT DIAGNOSIS AND TROUBLESHOOTING..............................................................18
9. DISASSEMBLY INSTRUCTIONS ...............................................................................................24
10. EXPLODED VIEW.....................................................................................................................31
10-1. THE EXPLODED VIEW OF CABINET ASSEMBLY.........................................................31
10-2. THE EXPLODED VIEW OF CONTROL PANEL & DISPENSER ASSEMBLY..................32
10-3. THE EXPLODED VIEW OF DRUM & TUB ASSEMBLY...................................................33
APPENDIX (Replacement parts list).........................................................................................34
2

600mm(W)
550mm(D)
850mm(H)
3
1. SPECIFICATION
ELECTRICITY
CONSUMPTION
REVOLUTION
SPEED
WASH CAPACITY
7.5Kg
WASH PROGRAM Cotton, Synthetic, Delicate, Hand Wash/Wool, Quick 30, Baby Care
OPTION Medic Rinse, Rinse +, Pre-Wash, Crease Care, Rinse Hold
DOOR SWITCH TYPE Bi-Metal type
WATER LEVEL 9 steps
(
by sensor
)
RESERVATION From 3 hours to 19 hours
SENSING OF THE LAUNDRY AMOUNT Adopted
FUZZY LOGIC Adopted
DISPLAY OF THE REMAINING TIME Adopted
ERROR DIAGNOSIS 7items
POWER AUTO OFF Adopted
CHILD LOCK Adopted
AUTO RESTART Adopted
ITEM
SPIN
WD-1238C
POWER SUPPLY220-240V~, 50Hz
PRODUCT WEIGHT 63kg
WASHING 160W
SPIN (1200rpm) 520W
DRAIN MOTOR 34W
WASH HEATER 2160W
WASH 50rpm
OPERATION WATER PRESSURE 0.3-10kgf/cm
2
(
30-1000kPa
)
CONTROL TYPE Electronic
Synthetic(3.5), Delicate(2.0), Handwash/Wool(1.5)
Baby Care(2.0)
Quick 30(2.0)
DIMENSION
WD-1238C No spin/400/800/1000/1200rpm

More economical by Fuzzy Logic System
FUZZY Logic System detects the amount of load and water
temperature, and then determines the optimum water level
and washing time to minimize energy and water
consumption.
Child-Lock
The hild-Lock system has been developed to prevent
children from pressing any button
(except Power button)
to change the programme during operation.
Low noise speed control system
By sensing the amount of load and balance, automatical
distributes load evenly to minimize the spinning noise level.
Auto Restart
Although the washing machine is turned off by a power failure,
it restarts automatically where it stopped when power is
supplied again. and it will be the same the machine is
unplugged and is plugged in again.
2. FEATURES & TE HNI AL EXPLANATION
4
2-1.FEATURES
Crease Care
Rinse HoldRinse Hold
No SpinNo Spin

2-2.DETERMINE WASHING TIME BY FUZZY LOGIC
To get the best washing performance optimal time is determined by sensing of water temperature,
selected washing temperature and laundry amount.
2-3.WATER LEVEL CONTROL
This model adopts a pressure sensor which can sense the water level in the tub.
When the water level reaches to the preset level the water supply is stopped, then the washing program proceeds.
Spinning does not proceed until the water in the tub reduces a certain level.
2-4.THE DOOR CAN NOT BE OPENED
While program is operating.
While Door Lock light turns on.
5
UZZY
LOGIC
laundry
amount
selected
washing
temperature
water
temperature
washing time
rinse time
spin rhythm, time
the best
washing
performance
SENSING
PROCESSING DETERMINATION
EFFECT

3. PARTS IDENTIFICATION
6
Hot Cold (2EA)
Cold (1EA) Wrench
ACCESSORIES

Before servicing ask the customer what the trouble is.
Check the adjustment (power supply is 220-240V, remove the transit bolts....)
Check the troubles referring to the troubleshooting.
Decide service steps referring to disassembly instructions.
Then, service and repair.
After servicing, operate the appliance to see whether it works OKor NOT.
STANDARD INSTALLATION
The appliance should be installed as follows.
REMOVE THE TRANSIT INSTALL THE APPLIANCE ADJUST THE
BOLTS ON FLAT AND FIRM SURFACE HORIZONTAL
Remove the transit bolts Turn the adjustable feet to
(4EA: ) with supplied wrench. set the appliance horizontally.
Keep the transit bolts and
wrench for future use.
Insert the 4 caps provided
into the hole.
The appliance goes up by
rotating the feet clockwise.
The appliance comes down by
rotating the feet counter-
clockwise.
4. INSTALLATION
7
1
TimeDelay
imeDelay
Bio
Bio
TimeSave
imeSave
Rinse
Rinse+
PreW PreWash
ash
DoorLock
DoorLock
Star
Start
/
Pause
Pause
CreaseCare
CreaseCare
Rinse+Spin
Wool
ool
HandW
HandWash
ash
Drain Drain
Delicate
Delicate
Eco
Eco
Cotton Cotton
C
Quick30 Quick30
Synthetic Synthetic
Spin Spin
RinseHold RinseHold
NoSpin NoSpin
High
Low

HOW TO CONNECT INLET HOSE
Check that the rubber washer is inside of the
valve connector.
Connect the inlet hose firmly to prevent leak.
CONNECT DRAIN HOSE
CONNECT POWER PLUG
8
TimeDelay
imeDelay
Bio
Bio
TimeSave
imeSave
Rinse Rinse+
PreW
PreWash
ash
DoorLock
DoorLock
Star
Start
/
Pause
Pause
CreaseCare
CreaseCare
Rinse+Spin
Wool
ool
HandW
HandWash
ash
Drain Drain
Delicate
Delicate
Eco Eco
Cotton
Cotton
C
Quick30
Quick30
Synthetic
Synthetic
Spin
Spin
RinseHold
RinseHold
NoSpin
NoSpin
TimeDelay
imeDelay
Bio
Bio
TimeSave
imeSave
Rinse
Rinse+
PreW
PreWash
ash
DoorLock
DoorLock
Star
Start
/
Pause
Pause
CreaseCare CreaseCare
Rinse+Spin
Wool
ool
HandW
HandWash
ash
Drain
Drain
Delicate
Delicate
Eco Eco
Cotton
Cotton
C
Quick30
Quick30
Synthetic Synthetic
Spin Spin
RinseHold
RinseHold
NoSpin
NoSpin
TimeDelay
imeDelay
Bio
Bio
TimeSave
imeSave
Rinse
Rinse
+
PreW
PreW
ash
ash
DoorLock
DoorLock
Star
Star
t
/
Pause
Pause
CreaseCare
CreaseCare
Rinse+Spin
Wool
ool
HandW
HandW
ash
ash
Drain
Drain
Delicate
Delicate
Eco
Eco
Cotton
Cotton
C
Quick30
Quick30
Synthetic
Synthetic
Spin
Spin
RinseHold
RinseHold
NoSpin
NoSpin
Make sure that the hose is not twisted.
The drain hose should be placed under 100cm from the floor.
Connect the power plug to the wall outlet. Avoid connecting several electric devices,
It may be the cause of a fire.
Avoid submerging the end of the hose.

TEST OPERATION
9
TimeDelay
imeDelay
Bio
Bio
TimeSave
imeSave
Rinse
Rinse+
PreW PreWash
ash
DoorLock
DoorLock
Star
Start
/
Pause
Pause
CreaseCare
CreaseCare
Rinse+Spin
Wool
ool
HandW
HandWash
ash
Drain
Drain
Delicate
Delicate
Eco
Eco
Cotton
Cotton
C
Quick30
Quick30
Synthetic
Synthetic
Spin
Spin
RinseHold
RinseHold
NoSpin
NoSpin
TimeDelay
imeDelay
Bio Bio
TimeSaveimeSave
Rinse Rinse+
PreW
PreWash
ash
DoorLock DoorLock
Star Start
/
Pause Pause
CreaseCare CreaseCare
Rinse+Spin
Wool
ool
HandW
HandWash
ash
Drain
Drain
Delicate
Delicate
Eco
Eco
Cotton
Cotton
C
Quick30
Quick30
Synthetic
Synthetic
Spin
Spin
RinseHold
RinseHold
NoSpin
NoSpin
TimeDelay
imeDelay
Bio Bio
TimeSave
imeSave
Rinse
Rinse+
PreW PreWash
ash
DoorLock
DoorLock
Star
Start
/
Pause Pause
CreaseCare
CreaseCare
Rinse+Spin
Wool
ool
HandW
HandWash
ash
Drain
Drain
Delicate
Delicate
Eco
Eco
Cotton
Cotton
C
Quick30
Quick30
Synthetic
Synthetic
Spin
Spin
RinseHold
RinseHold
NoSpin
NoSpin
Connect the power plug to In case of cotton program.
the outlet.
Connect the inlet hose.
Preparation for Press the power button. Press the START PAUSE
washing. button.
Press both Temp. button
simultaneously the present
temperature will be displayed.
Check if the drum rotates
clockwise and counterclockwise. Check if water is supplied through the detergent dispenser.
Power off and then power on.
Check if the door can be
opened after Door Lock lamp
turns off.
Power off and then power on.
Turn on Spin lamps after
pressing the Start Pause button
and Start the machine again.
Check drain and spin.
If SVC is needed during
check, remove
the remaining water by pulling
out the hose cap.
Check the water heating. Check automatic reverse Check the water supply.
turn.
Check drain and spin Power off and open the Water removal
door

12
6. WIRING DIAGRAM PROGRAM CHART
Baby Care
42
87
26
51
11
1:40
Drain
❋ Medic Rinse : For high effectiveness or more purity in rinse operation you can choose Medic Rinse option.
1:10
55
55
2:05
30
18
13
❋ Intensive : When washing full load or heavily soiled laundry, you can increase effectiveness by choosing intensive option.
❋ Program setting with "Intensive" option for test in accordance or in conformity with EN60456 and IEC 60456.
❋ Pre Wash : If the laundry is heavily soiled, "Pre Wash" course is recommended. Pre Wash is available in
Cotton, Eco and Synthetic Program.
❋ Rinse+: Used to introduce an additional rinse, which may assist in removing traces of detergent residue.
❋ Crease Care : If you want to prevent crease, select Crease Care option.

14
7-4.ERROR DISPLAY.
If you press the Start Pause button any error except will disappear and the machine will change
into pause status.
In case of if the error is not resolved within 15 sec. In case of other errors, if the
error is not resolved within 4 min. Power will be turned off automatically and the error only will be
blinked. But in the case of , power will not be turned off.
ERROR SYMPTOM
1WATER INLET Water has not reached to the pre-set level within 4 min. since
ERROR inlet valve operated, or water has not reached to the normal
level within 25 min.
2IMBALANCE The appliance is tilted.
ERROR Laundry is gathered to one side.
Non distributable things are put into the drum.
3DRAIN ERROR Water has not drained enough within 8 min.
4OVERFLOW Water is automatically being pumped out because too much
ERROR water is in the tub.
5
SENSOR PRESSURE The sensor pressure switch is out of order.
S W ERROR
6DOOR OPEN The
Start Pause button is pressed with the door open.
ERROR The door switch is out of order.
7HEATING
ERROR The thermistor is out of order.

15
8-1.DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION
8. ERROR DIAGNOSIS AND CHECK LIST
SYMPTOM GUIDE OR SERVICE CALL
NO POWER
Water inlet trouble
YES
YES
YES
NO
NO
YES
NO
NO
Is the power plug connected firmly to
220-240V~ outlet?
Power failure? or Breaker opened?
Is the outlet controlled by a switch.
Visit to check
Is displayed?
Is the tap opened?
Is the tap frozen?
Is the water supply shut-off?
Is filter in the inlet valve clogged with foreign
material?
Visit to check
Clean the filter of
inlet valve

16
SYMPTOM GUIDE OR SERVICE CALL
DOOR OPEN ERROR
Refer to
7-4 ERROR DISPLAY
Drain Trouble
NO
YES
YES
NO
NO
YES
Did you press the Start/Pause button when
the door is open?
Visit to check
Check if the door switch is O.K
Is displayed?
Is the debris filter clogged with foreign
material such as pins, coins, etc.?
Is the drain hose frozen with water, kinked, or
crushed?
Visit to check
Close the door
Clean up
the filter.

17
SYMPTOM GUIDE OR SERVICE CALL
Suds overflow from the
appliance.
(In this condition, wash and
spin do not operate
normally)
No effect of softener
YES
YES
YES
YES
YES
Is low-sudsing detergent for the durm
washing machine used?
Is the proper amount of detergent used
as recommended?
Recommend to reduce the amount
of detergent.
Is softener put in the correct compartment of
drawer?
Is the drawer closed during wash?
Is the softener cap clogged?
Explain how to use softener
Clean the compartment for softener
Visit to check
LOW SUDSING
DETERGENT
Compartment for
softener
This appliance has the automatic suds sensing function which
operates under much suds condition for good rinse and
preventing overflow.
When much suds are sensed, the suds removing fuction such as
drain, water input, and pause will operate without rotating the
drum.

18
8-2.FAULT DIAGNOSIS AND TROUBLESHOOTING
1. Be careful of electric shock or disconnecting the parts while troubleshooting.
2. First of all, check the connection of each part terminal with wiring diagram.
3. If you replace the PWB assembly (Main), put in the connectors correctly.
CAUTION
NO
NO
NO
YES
YES
YES
YES
NO
NO
YES
<PWB ASSEMBLY (MAIN)>
<PWB ASSEMBLY (MAIN)>
(1)
(6) (5) (2)
NO POWER
Check the fuse?
Replace PWB assembly
(Main)
Replace PWB assembly
(Main)
Reconnect the PWB
assembly (Display)
Reconnect the PWB
assembly (Display)
When measuring the voltage of the outlet,
is the voltage AC 220-240V?
Is the LED (1) on?
When measuring the voltage of natural
connector (5,6) is the voltage DC 10~16.5V?
Is connector (2) disconnected or
disassembled?
Is wire of the PWB assembly (Display)
disconnected?
Replace PWB assembly (Display)

19
NO
YES
NO
NO
YES
NO
YES
YES
NO
NO
YES
YES
YES
NO
NO
NO
YES
Wiring diagram
option (HOT)
option (HOT)
MAX
max
Is the water supply shut-off?
Is the tap opened?
When you press both Bio button and Time Delay
button simultaneously, is the water level frequency
below 240?
Is the inlet valve filter clogged with impurity?
Is resistance of the inlet valve connector
between the 2 to 8
k ?
Check the voltage between each terminals of inlet
Valve is 220 - 240V~.
(Refer to 7-2 TEST MODE)
Is water supplied?
Are replaceptacles correctly connected to the
terminals of inlet valve?
Is detergent put in the correct compartment of
the drawer?
Is the detergent caked or hardened?
Open the tap.
Check the chamber (Air)
and the tube clogged
with impurity.
Clean the filter.
Replace the inlet valve.
Replace PWB assembly
(Main)
Refer to solution
NO INLET
Check the wiring on the
dispenser.
Put the detergent in the
correct position
PRE+MAIN
MAIN WASH
: Detergent
Clean the drawer.
NO WATER SUPPLY
DETERGENT DOES NOT LOW IN
MAIN
WASH
SOFTENER
PRE -
WASH