LG WD-1255RD User manual

WASHING MACHINE
SERVICE MANUAL
READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLES
CORRECTLY BEFORE OFFERING SERVICE.
MODEL : WD-1255RD/WD-1256RD
CAUTION

CONTENTS
. SPECIFICATION............................................................................................................................3
2. FEATURES & TECHNICAL EXPLANATION ................................................................................ 4
3. PARTS IDENTIFICATION ............................................................................................................ 7
4. INSTALLATION............................................................................................................................. 8
5. WIRING DIAGRAM / PROGRAM CHART ...................................................................................
6. OPERATION ................................................................................................................................ 2
7. TROUBLE SHOOTING................................................................................................................ 4
7- .BEFORE SVC CHECKING.................................................................................................. 4
7-2.QC TEST MODE.................................................................................................................. 4
7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY......................................................... 4
7-4.ERROR DISPLAY ................................................................................................................ 5
8. ERROR DIAGNOSIS AND CHECK LIST .................................................................................... 7
8- . DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION........................................... 7
8-2. FAULT DIAGNOSIS AND TROUBLE SHOOTING .............................................................20
9. DISASSEMBLY INSTRUCTIONS ...............................................................................................30
0. EXPLODED VIEW AND PARTS LIST .......................................................................................40
0- . THE EXPLODED VIEW OF CABINET ASSEMBLY .........................................................40
0-2. THE EXPLODED VIEW OF DRUM AND TUB ASSEMBLY .............................................4
0-3. THE EXPLODED VIEW OF CONTROL PANEL AND DISPENSER ASSEMBLY ............42
0-4. THE EXPLODED VIEW OF DRYER ................................................................................43
2

3
. SPECIFICATION
ITEM
PO WER SUPPLY
PRODUCT WEIGHT
WASHING 200W
SPIN 300W
FAN MOTOR 3W
DRAIN MOTOR 30W
WASH HEATER
DRY HEATER
WASH 46rpm
No Spin/400/800/ 000/ 200
OPERATION WATER PRESSURE
0.3- 0kgf/cm
2
(30- 000kPa)
CONTROL TYPE Electronic
WASH CAPACITY
DRY CAPACITY
DIMENSION 686mm(W)×767mm(D)×982mm(H)
WASH PROGRAM
Cotton, Sythetic, Delicate, Wool/Silk, Hand Wash, Duvet, Quick 30, Refresh, Baby Care
Option Pre Wash, Rinse+Spin, Dry only, Less Steam, Eco Steam
RINSE Rinse++Hold, Normal+Hold, Medic Rinse, Rinse+,Normal
DOOR SWITCH TYPE PTC+Solenoid Type
WATER LEVEL 0 steps (by sensor)
RESERVATION From 3 hours to 9 hours
SENSING OF THE LAUNDRY AMOUNT Adapted
FUZZY LOGIC Adapted
DISPLAY OF THE REMAINING TIME Adapted
ERROR DIAGNOSIS 3 items
POWER AUTO OFF Adapted
CHILD LOCK Adapted
AUTO RESTART Adapted
TIME SAVE Adapted
TURBO STEAM Adapted
ELECTRICITY
CONSUMPTION
REVOLUTION
SPEED
WD- 255RD, WD- 256RD
SPIN
220-240V~, 50Hz
94kg
2000W
0kg
6kg
2 00W

2. FEATURES & TECHNICAL EXPLANATION
4
2-1.FEATURES
■Ultra Capacity
The Larger drum enab es not just higher head drop and stronger centrifuga force, but
a so ess tang ing and wrink ing of the aundry. Heavier oads, such as king size
comforters, b ankets, and curtains, can be washed.
■Direct Drive System
The advanced Brush ess DC motor direct y drives the drum without
be t and pu ey.
■Tilted Drum and Extra Large Door Opening
Ti ted drum and extra arge opening make it possib e to oad
and un oad c othing more easi y.
■Steam Washing and SteamFreshTM
Steam Washing features upgraded washing performance with ow energy and water
consumption. SteamFreshTM cyc e removes wrink es from dry c othes.
■RollerJets
Washing ba enhances the wash performance and reduces damage
to the c othing. The jets spray and he p tumb e c othes to enhance
washing performance whi e maintaining fabric care.
■Automatic Wash Load Detection
Automatica y detects the oad and optimizes the washing time.
■Built-in Heater
Interna heater he ps to maintain water temperature at its optimum eve for se ected
cyc es.
■Child Lock
The Chi d ock prevents chi dren from pressing any button to change the settings
during operation.
추가선택, 예약,
추가선택, 예약,

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.
●Water supply is stopped when the water level to the preset level, then washing program proceeds.
●Spinning does not proceed until the water in the tub reduces to a certain level.
2-4. DOOR CONTROL
●The door can be opened by pulling the door handle whenever washer is not in operation.
●When the cycle is completed, the DOOR LOCKED light will turn off.
●If a power failure has occurred while in operation, the door will unlock after 5 minutes.
●Clicking sounds can be heard when the door is locked/unlocked.
5
FUZZY
LOGIC
laundry
amount
selected
washing
temperature
water
temperature
washing time
rinsing time
spin rhythm, time
the best
washing
performance
SENSING PROCESSING DETERMINATION EFFECT

6
2-5. THE DOOR CAN NOT BE OPENED
●While program is operating
●When a power failed and power plug is taken out in operation
●While Door Lock lights turn on.
●While the motor is in the process of inertial rotating, through the operation is paused.
2-6. DOOR LOCKED LAMP LIGHTS
●When the frequency of water level is lower than 22.9 kHz
(It can be canceled when the frequency is more than 23.8 kHz)
●When the temperature inside the tub is higher than 45 °C and water level is not 25.5 kHz
(It can be canceled when the water level is 25.5 kHz or the temperature inside the tub is lower than 40 °C)
2-7. CHILD LOCK
●Use this option to prevent unwanted use of the washer. Press and hold the Option and Rinse button for 3
seconds to lock/unlock control.
●When Child lock is set, CHILD LOCK lights and all buttons are disabled except the Power button. You can
lock the washer while it is operating.
2-8. WATER CIRCULATION
●When Washing and Rinsing function of shower at the upper part of Gasket.
●When Washing, it continuously operates for 3 minutes and intermittently.
●When Rinsing, it continuously operates after completion of water supply.
2-9. STEAM
●For tough stained clothes, underwear, or baby clothes.
●Steam Wash is available with Sanitary, Bulk/Large, Perm. Press, Cotton/Normal, and baby Wear cycles.
●This option features upgraded washing performance with low energy and water consumption
●Do not load delicates such as wool, silk, and easily discolored clothes.
2- 0. DRUM LIGHT
●The Drum Light comes on when the Power button is pressed. It goes off when the door is closed and the
washer starts operation.
●The Drum Light remains off when the door is locked.
●The Drum Light comes on when the washing cycle is finished and goes off 4~8 minutes later.

3. PARTS IDENTIFICATION
7
■ACCESSORIES
S anner
Water Supply
Hose
Drum Light

󱀊Before servicing ask troubles of customers
󱀋Check the adjustment(power supply is 220-240 ~, remove the transit bolts....)
󱀌Check the troubles referring to the trouble shooting.
󱀍Decide service steps referring to disassembly instructions.
󱀎And then, service and repair.
󱀏After servicing, operate the appliance whether it works O·Kor NOT.
■STANDARD INSTALLATION
The appliance should be installed as follows.
REMO E THE TRANSIT INSTALL THE APPLIANCE ADJUST THE
BOLTS ON FLAT AND FIRM SURFACE LE ELING
󳢯Remove the transit bolts
(4EA:①)with supplied spanner.
󳢯Keep the transit bolts and
spanner for future use.
󳢯Insert the 4 caps
provided into the hole
4. INSTALLATION
8
1
2
󳢯Turn the leveling feet to adjust the
appliance.
󳢯Turn clockwise to raise;
counterclockwise to lower.
Favorite
Sanitary

■HOW TO CONNECT INLET HOSE
󳢯Check that the rubber packing is inside of the
valve connector.
󳢯Connect the inlet hose firmly to prevent leak.
■CONNECT DRAIN HOSE
■CONNECT POWER PLUG
9
·Make sure that the hose is not twisted.
※The drain hose should be placed under 00cm from the floor.
·Connect the power plug to the wall outlet. ·Avoid connecting several electric devices,
It may be the cause of the fire.
·Avoid submerging the end of the hose.
Favorite
Sanitary
Favorite
Sanitary
Favorite
Sanitary

󳞊TEST OPERATION
10
Favorite
Sanitary
Favorite
Sanitary
Favorite
Sanitary
SOFTENER
MAX
󳢯Connect the power plug to
the outlet. 󳢯In case of Coloreds program.
󳢯Connect the inlet hose.
Preparation for Press the POWER button. Press the Start/Pause
washing. button.
·Press the Temp. button ·Check if the drum rotates ·Check if water is supplied
and the present temperature will
clockwise and counterclockwise.
through the detergent dispenser.
be displayed.
·Power off and then power on.
·Check if the door can be
opened after 3 minutes.
·Turn off Wash and Rinse 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

11
6. WIRING DIAGRAM / PROGRAM CHART
Drain
I
⁄
S
Heat
Steam
Wash
Drain
I
⁄
S
Drain
I
⁄
S
Drain
I
⁄
S
Drain
I
⁄
S
1234567891011121314151617181920212223242526272829
90
8"30 60 300 120 (12) " (20) " (42) " 60 300 120 180 60 300 120 180 60 300 120 180 60 300 120 180 60 480 180 20 20
13
**Appr x
W rking
Time
(Minute)
32
20
181
58
58
57
80
30
E
N
D
A
U
T
O
O
F
F
129
93
Rinse
Spin
Drain
Spin
D
⁄
T
Extra &
Stain(4~6)
W
⁄
S
Rinse
3
W
⁄
S
Rinse
2
W
⁄
S
Rinse
Wash
1
W
⁄
S
Rinse
Wash
Pre Main
W
⁄
S
Wash
W
⁄
S
Baby Care
Wash
Spin
Duvet
Quick 30
Rinse+Spin
Refresh
C tt n
Synthetic
Delicate
W l/Silk
57
Hand Wash
Heat

12
5. OPERATION
• Rotate the Cycle
selector knob to select
the cycle designed for
different types of fabric
and soil levels.
CYCLE SELECTOR KNOB
START/PAUSE BUTTON
• Use this button to Start/
Stop the washer.
• Use this button to turn the power
On/Off.
POWER BUTTON EST. TIME REMAINING
• This display shows:
a) the estimated time remaining in the
cycle when operating.
b) an error code when an error has been
detected.
OPTION BUTTON
•Pre Wash: Use this option for loads that need pretreatment. It add 6
minutes prewash and drain.
•Rinse + Spin: Use this option to rinse and then spin.
•Dry Only: When you want dry only, select the this option.
• Less Steam: Use this option to a steam wash for only a small amount
of laundry, select the this option.
• Eco Steam: Use this option to a steam wash while reducing the
electricity consumption, select the option

13
CHILD LOCK
• Use this option to prevent unwanted use of the
washer. Press and hold the Wash and Rinse
button for 3 seconds to lock/unlock control.
• When Child lock is set, CHILD LOCK lights
and all buttons are disabled except the Power
button. You can lock the washer while it is
operating.
RINSE, TEMP., and SPIN BUTTON
• To change the Rinse Cycling, press the
Rinse button repeatedly through available
options.
• Select a water temperature based on the
type of load you are washing.
• To change the spin speed, press the Spin
Speed button repeatedly to cycle through
available options.
TURBO STEAM
• This option features upgraded
washing performance with low
energy and water
consumption.
DRY KNOB
• Dry programs selected by
rotating dry knob.
• [Normal – More – 30 – 60 – 90 –
20 – 50 – Low Temp. – Iron]
can be selected.] can be selected.
• Add rinse Water: This option provides an
additional rinse.
• Favorite:This option allows you to store a
customized wash cycle for future use.
ADD RINSE WATER, FAVORITE BUTTON STATUS INDICATOR
• These lights show which portion
of the cycle the washer is
operating.
TIME DELAY
• Allows the start of any cycle
to be delayed for 3~ 9
hours.

7- .BEFORE SVC CHECKING
■Be careful of electric shock or disconnecting the parts while trouble shooting.
■Voltage of each terminal is 220-240V~ and DC while applying an electric current.
7-2.QC TEST MODE.
①①Pressing Rinse, and Temp. button simultaneously.
②②Press the Power button, while the above condition.
③③Press the Start/Pause button as follows.
7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY
󳢬Press the Rinse and Temp. button simultaneously.
ex) 24 : Water level frequency = 24 ×0- kHz
=24. kHz
7-4.HOW TO KNOW TO TEMPERATURE OF EACH THERMISTOR
AT OPERATING CONDITION.
■ Thermistor in tub : Press the [Spin] button.
■ Thermistor in dry duct : Press the [Turbo Steam] button.
14
7. TROUBLE SHOOTING
The digits means water level frequency( 0- kHz)
Number of times the
Start/Pause button is pressed
Check Point Display Status
None Turns on all lamps and locks the door.
time Tumble clockwise rpm (42~50)
2 times Low speed Spin. rpm (55~65)
3 times High speed Spin rpm ( 0~ 20)
4 times Inlet valve for prewash turns on. Water level frequency (25~65)
5 times Inlet valve for main wash turns on. Water level frequency (25~65)
6 times Inlet valve for hot water turns on. Water level frequency (25~65)
7 times Inlet valve for steam water turns on. Water level frequency (25~65)
8 times Inlet valve for dry water turns on. Water level frequency (25~65)
9 times
Tumble counterclockwise
pm (42~50)
0 times
Wash heater turns on for 3 sec.
Water temperature
times
Circulation pump turns on. Water level frequency (25~65)
2 times
Drain pump turns on. Water level frequency (25~65)
3 times
Dry heater turns on for 3 sec.
Water temperature
4 times
Water level Sensor for Steam
Water level frequency of TSG (0~255)
5 times
Steam Heater turns on for ,2 sec. TSG temperature
6 times
Power off and unlock the door. Turn off all lamps.

15
7-5.ERROR DISPLAY.
󳢯If you press the Start/Pause button in error condition, any error except ‘ ’ will disappear and the
machine will change into pause status.
󳢯In case of de, de, de, if the error is not resolved within 20 sec., and 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 case of de, power will not be turned off.
ERROR SYMPTOM CAUSE
1
2
3
4
5
6
7
• Not reached to the water level(246)within 8
minutes after water supplied or not reached to
the preset water level within 25 minutes.
• Not fully drained within 0 minutes.
• Water is over flowing(over 8 level).
※If is displayed, drain pump operates to
drain water automatically.
• The sensor pressure switch is out of order.
• In case of operating the reservation function or
the other function with door opened. Close the
door, then the error display is resolved.
• The door switch is out of order.
• The appliance is tilted.
• Laundry is gatherd to one side.
• The THERMISTOR is out of order.
WATER INLET
ERROR
DRAIN ERROR
OVERFLOW
ERROR
SENSOR PRESSURE
S/W ERROR
DOOR OPEN
ERROR
IMBALANCE
ERROR
HEATING
ERROR

ERROR SYMPTOM CAUSE
8
9
• The connector in the LEAD WIRE ASSEMBLY is not connected to
the connnector of STATOR ASSEMBLY
󳢹Reconnect or repair the connector
• The hall sensor is out of order/defective.
󳢹Replace the STATOR ASSEMBLY
• The Dry Heater is out of order
󳢹Replace the Dry Heater
• The Connector of the Dry Heater is not connected properly to the
connector in the Main PWB ASSEMBLY
󳢹Reconnect or repair the connector
• The Dry fan motor is out of order
󳢹Replace the fan Motor.
MOTOR
ERROR
DRY
HEATOR
ERROR
16
• Loose Ball Sensor Connector.
• Ball Sensor is out of order.
※Displayed only when the START/PAUSE button is first
pressed in the QC Test Mode.
10
BALL
SENSOR
ERROR
•
The washer experienced a power failure.
12
POWER
FAILURE
• EEPROM is out of order.
※Displayed only when the START/PAUSE button is first
pressed in the QC Test Mode.
11
EEPROM
ERROR

17
8- .DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION
8. ERROR DIAGNOSIS AND CHECK LIST
SYMPTOM GUIDE FOR SERVICE CALL
NO POWER
Water inlet trouble
YES
YES
YES
NO
NO
YES
NO
NO
No Inlet
Is the power plug connected firmly to
220-240V~ outlet?
Power failure? or Breaker opened?
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

18
SYMPTOM
• D r d es n t pen
• Err r displayed n
the pr gram
• DRAIN TROUBLE
GUIDE FOR SERVICE CALL
NO
YES
NO
YES
Started with door opened?
NO
YES
Is the debris filter clogged with foreign
material such as pin, coin and etc.?
Is the drain hose frozen with water,
kinked or crushed?
Visit to check
Close the door
Visit to check
Check if the door switch is O K.
Is " " displayed?
Clean up
the filter.
.

19
SYMPTOM GUIDE FOR 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 drum
washing machine used?
Is the proper amount of detergent used
as recommended?
Recommend to reduce the using amount
of detergent.
Is softener put in the correct compartment of
the 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
󳢮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, suds removing function such as
drain, water input and pause will operate without rotating the
drum.

20
8-2.FAULT DIAGNOSIS AND TROUBLE SHOOTING
. Be careful of electric shock or disconnecting the parts while trouble shooting.
2. First of all, check the connection of each part terminal with wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, Put in the connectors correctly.
NO
NO
YES
YES
YES
NO
NO
YES
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(1)
(2)
Connector
Check the fuse?
Replace MAIN PWB
ASSEMBLY
Replace the FILTER
ASSEMBLY(CIRC)
Reconnect the PWB
ASSEMBLY
Reconnect the PWB
ASSEMBLY
When measuring the voltage of the outlet,
is the voltage AC 220-240V~?
Is the LED( ) on?
Is the voltage between the 2 FILTER ASSEMBLY
connectors 220~240 V AC?
Is connector(2) disconnected or
disassembled?
Is wire of the PWB ASSEMBLY disconnected?
Replace PWB ASSEMBLY
NO POWER
CAUTION