LG WD(M)-8070F(H)(B) User manual

WASHING MACHINE
SERVICE MANUAL
READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLE
CORRECTLY BEFORE OFFERING SERVICE.
MODEL : WD(M)-8070F(H)(B)
WD(M)-1070(5)F(H)(B)
WD(M)-1170(5)F(H)B
WD(M)-1270(5)F(H)B
WD(M)-1370(5)F(H)B
WD-8078FHB
WD(M)-8074F(H)B
WD(M)-1074(6)F(H)B
WD(M)-1174(6)F(H)B
WD(M)-1274(6)F(H)B
WD(M)-1374(6)F(H)B
WD-1078FHB
WM-1171(6)FHB
WM-1371(6)FHB
WD-1271FB
CAUTION
website : http://www.LGEservice.com
e-mail : http://LGEservice.com/techsup.html

CONTENTS
1. SPECIFICATION............................................................................................................................3
2. FEATURES & TECHNICAL EXPLANATION ................................................................................ 4
3. PARTS IDENTIFICATION ............................................................................................................ 6
4. INSTALLATION............................................................................................................................. 7
5. OPERATION................................................................................................................................10
6. WIRING DIAGRAM......................................................................................................................12
7. PROGRAM CHART.....................................................................................................................13
8. TROUBLESHOOTING.................................................................................................................14
8-1.BEFORE PERFORMING SERVICE....................................................................................14
8-2.QC TEST MODE..................................................................................................................14
8-3.HOW TO KNOW THE WATER LEVEL FREQUENCY.........................................................14
8-4.ERROR DISPLAY................................................................................................................15
9. ERROR DIAGNOSIS AND CHECK LIST....................................................................................17
9-1. DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION...........................................17
9-2. FAULT DIAGNOSIS AND TROUBLESHOOTING ..............................................................20
10. DISASSEMBLY INSTRUCTIONS .............................................................................................30
11. EXPLODED VIEW AND PART LIST..........................................................................................37
11-1. THE EXPLODED VIEW OF CABINET ASSEMBLY..........................................................37
11-2. THE EXPLODED VIEW OF CONTROL PANEL & DISPENSER ASSEMBLY..................39
11-3. THE EXPLODED VIEW OF DRUM & TUB ASSEMBLY...................................................40
ƒRAPPENDIX (Replacement parts list).......................................................................................42
2

3
1. SPECIFICATION
ITEM
POWER SUPPLY 220-240V~, 50Hz
PRODUCT WEIGHT
WASHING
SPIN (800rpm) 300W
DRAIN MOTOR 32W
WASH HEATER 2000W
WASH 45rpm
SPIN WD(M)-8070(4)F(H)(B)/WD-8078FHB 400/600/800 rpm
WD(M)-1070(5)F(H)(B)/1074(6))F(H)B/WD-1078FHB 400/600/800/1000 rpm
WD(M)-1170(5)F(H)B/1174(6)F(H)B/WM-1171(6)FHB 400/600/800/1100 rpm
WD(M)-1270(5)F(H)B/1274(6)F(H)B 400/600/800/1000/1200 rpm
WD(M)-1370(5)F(H)B/1374(6)F(H)B/WM-1371(6)FHB/WD-1271FB 400/600/800/1100/1300 rpm
OPERATION WATER PRESSURE 0.3-10kgf/ (30-1000kPa)
CONTROL TYPE Electronic
7.0kg
Synthetic (4.0kg), Delicate (3.0kg)
Wool (2.0kg) Hand Wash (2.0kg)
DIMENSION 600mm (W) 600mm (D) 850mm (H)
Whites, Coloureds, Synthetic, Delicate, Wool, Hand Wash
Rinse+Spin, Spin, Pump
OPTION Bio, Rinse +, Eco, Pre Wash
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 10items
POWER AUTO OFF Adopted
CHILD LOCK Adopted
AUTO RESTART Adopted
WD(M)-8070F(H)/1070(5)F(H)
67kg
190W
ELECTRICITY
CONSUMPTION
WASH CAPACITY
WASH PROGRAM
REVOLUTION
SPEED
63kg
150W
WD(M)-8070F(4)(H)B/1070(5)F(H)B/1170(5)F(H)B
WD(M)-1270(5)F(H)B/1370(5)F(H)B
WD(M)-1074(6)F(H)B/1174(6)F(H)B
WD(M)-1274(6)F(H)B/1374(6)F(H)B
WD-8078FHB/1078FHB
WM-1171(6)FHB
WM-1371(6)FHB
WD-1271FB

Jumbo drum
LG’s jumbo drum can wash about 40% more per load than
conventional washing machine. A bigger drum improves the
wash performance.
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 Child-Lock system has been developed to prevent
children from pressing any 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. It will be the same when the machine
unplugged and is plugged in again.
2. FEATURES & TECHNICAL EXPLANATION
4
2-1.FEATURES
40%

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
FUZZY
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
Power plug
Control panel
Door
Lower cover
Adjustable feet
(For detergent and
fabric softener)
Drawer
Drum
Drain hose
Lower cover cap
Drain pump filter
Drain plug
If the supply cord is damaged,
it must be replaced by the
manufacturer or its service
agents or a similarly qualified
person in order to avoid a
hazard.
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 O K or NOT.
STANDARD INSTALLATION
The appliance should be installed as follows.
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
High
Low
REMOVE
THE TRANSIT BOLTS INSTALL THE APPLIANCE ON FLAT AND FIRM SURFACE ADJUST THE HORIZONTAL

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
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
Connect the power plug to In case of Coloureds program.
the outlet.
Connect the inlet hose.
Preparation for Press the power button. Press the Start/Pause
washing. button.
Press the button TEMP Check if the drum rotates Check if water is supplied
and the present temperature clockwise and through the detergent
will be displayed. counterclockwise. dispenser.
Power off and then power on.
Check if the door can be
opened after door lock lamp
turns off.
Turn off Spin and Temp 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

10
5. OPERATION
2
Water temperature selector
Press the button to select water temperature.
The water temperature
[40 C 50 C60 C Cold 30 C] can be
selected in Coloreds, or Synthetic.
95 C is selected for Whites only.
By pressing the button while operating the washer,
the present temperature is displayed.
Rinse hold
If you desire to leave fabrics in the machine without spinning after rinse to
prevent them wrinkling, you may select rinse hold by pressing the spin
button.
If you want to drain and spin, when Rinse Hold function is proceed, Press
the Start/Pause button to cancel the Rinse Hold function and select spin
speed or program. Press the Start/Pause button again to start program.
If you want to drain only, select the no spin or pump program.
If lamp turns on, that function has been selected.
Option
Bio
If you want to elimenate protein
stains(milk, blood, chocolate...),
you may select Bio by pressing
the option button.
[You can select Bio when
temperature is higher than 60 C
in Whites, Coloureds and
Synthetic.]
Rinse+
If you wish to rinse more, the
Rinse+option will remove any
trace of detergents.
Eco
By selecting Eco, the water
temperature is reduced and
washing time is lengthened.
So you can economize in your
consumption of energy.
[You can select Eco when
temperature is higher than 60 C
in Whites, Coloureds and
Synthetic.]
Pre Wash
If the laundry is heavily soiled,
“Pre Wash”course is effective.
Pre Wash is available in
Coloureds, Whites and Synthetic
Program.
Child - lock
Child Lock system can be set and canceled by pressing
both [Temp.] and [Time Delay ] button simultaneously.
Once Child Lock is set, all button are inoperable.
Child Lock system can be set anytime even during
Power-off and operation.
It is automatically cancelled when an operational error
occur.

11
2
LED display
It displays the remaining time (Hour : Minute ) to
finish.
In case of abnormal operation, error indications are
displayed.
( )
See troubleshooting guide.
Wash program selector
9 programs can be set depending on the type of
the laundry.
By rotating the dial, [ Coloureds Synthetic
Delicate Wool Hand Wash Rinse + Spin
Spin Pump Whites ] can be selected.
(The opposite order is possible)
Start/Pause button
Use the button to start or
pause wash cycle.
The power turns off
automatically 4 minutes after
the pause button is pressed.
Time Delay
Press the button when delayed washing is needed.
When the button is pressed, [ ] is displayed,
maximum delay of [ ] hours can be set.
Each press advances time delay by the hour.
Use [Power]button to cancel [Time Delay].
[Time Delay] means the time required from the
present to the completion of washing.
Rapid
If you press the Rapid button in Whites or
Coloureds program, Rapid function is selected.
Rapid function reduces the whole time including
the Washing and Rinsing time.
Power button
Press the button to turn power
on and off.
Press the button to cancel the
delay finish.

12
6. WIRING DIAGRAM
(option)
GN/YL
■ WD(M)-8070F(H)B, WD(M)-1070(5)F(H)B, WD(M)-1170(5)F(H)B, WD(M)-1270(5)F(H)B, WD(M)-1370(5)F(H)B
WD(M)-8074F(H)B, WD(M)-1074(6)F(H)B, WD(M)-1174(6)F(H)B, WD(M)-1274(6)F(H)B, WD(M)-1374(6)F(H)B
WD-8078FHB, WD-1078FHB, WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB
■ WD-8070F(H), WD-1070(5)F(H)

❋ Pre Wash : If the laundry is heavily soiled, “Pre Wash”course is effective. Pre Wash is available in Coloureds, Whites and
Synthetic Program.
❋ Eco : By selecting Eco function, the water temperature is reduced and washing time is lengthened. So you can economize in your
consumption of energy.
❋ Rinse+ : If you wish to rinse more, the Rinse+ function will remove any trace of detergents.
❋ Bio : If you want to elimenate protein stains (milk, blood, chocolate...), you may select Bio function by pressing the option button.
❋ You can select Bio function and Eco function when temperature is higher than 60˚C in Whites, Coloureds and Synthetic.
13
7. PROGRAM CHART

8-1. BEFORE PERFORMING SERVICE
¡ÆBe careful of electric shock or disconnecting the parts while troubleshooting.
¡ÆVoltage of each terminal in 220-240V~ and DC while applying an electric current.
8-2. QC TEST MODE.
¤Pressing Spin, and Temp button simultaneously.
¤ŁPower supply ON with pressing upper two button. then buzzer sound twice.
¤ØPress the START/PAUSE button as follows.
¡aPress the START/PAUSE button more 4 times until stop spinning¡b
8-3. HOW TO KNOW THE WATER LEVEL FREQUENCY
ƒRPress the Option and Spin button simultaneously.
ex) 241 : Water level frequency = 241¡¿10-1§
=24.1§
14
8. TROUBLESHOOTING
The digits means water level frequency (10-1 § )
Pressing number of
£START/PAUSE£button
Checking Point Display Status
None All lamps turn on
1 time Clockwise spin (right) Motor rpm (About 45)
2 times Low speed spin Motor rpm (About 63~67)
3 times High speed spin
Motor rpm (About 79~85) : WD(M)-8070(4)F(H)(B)
Motor rpm (About 100~106) : WD(M)-1070(5)F(H)(B)/WD(M)-1074(6)F(H)B
Motor rpm (About 107~103) : WD(M)-1170(5)F(H)B/WD(M)-1174(6)F(H)B/WM-1171(6)FHB
Motor rpm (About 114~120) : WD(M)-1270(5)F(H)B/WD(M)-1274(6)F(H)B/WD-1271FB
Motor rpm (About 122~127) : WD(M)-1370(5)F(H)B/WD(M)-1374(6)F(H)B/WM-1371(6) FHB
4 times Inlet valve for pre-wash operation Water level frequency (25~65)
5 times Inlet valve for main-wash operation Water level frequency (25~65)
Hot inlet valve in case of hot water fill
6 times Inlet valve for main-wash operation Water level frequency (25~65)
7 times Counterclockwise spin (left) Motor rpm (About 45)
8 times A heater is in operation for 3 sec. Water temperature
9 times Draining pump operation Water level frequency
10 times Auto off operation

8-4. ERROR DISPLAY.
If you press the Start/Pause button when an error in displayed, any error except will disappear
and the machine will change into pause status.
In case of if the error is not resolved within 20 sec. In the case of other errors,
if the error is not resolved within 4 min. power will be turned off automatically and the error code will
blink. But in case of , power will not be turned off.
15
ERROR SYMPTOM CCAAUUSSEE
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 5 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
¡aStart/Pause¡b button is pressed with the door open.
ERROR §The door switch is out of order.
7HEATING
ERROR §The thermistor is out of order.
8SENSOR §The connector (5-pin, male, white) in the wire harness is not
ERROR connected to the connector (5-pin, female) of hall sensor in
the MOTOR.
ƒ_’Reconnect or repair the contact in the connector.

ERROR SYMPTOM CAUSE
8
9
10
•The electric contact between the connectors
(5-pin, male in the wire harness and 5-pin female in the hall sensor) is
bad or unstable.
ƒ_Reconnect or repair the contact in the connector.
•The connector (6-pin, male, natural) in the wire harness is not
connected to the connector (6-pin, female, natural) of PWB assembly
(Main) or the electric contact of connectors is bad/unstable.
ƒ_Reconnect or repair the contact in the connector.
•The electric contact between the connectors¡a6-pin, male in the wire
harness and 6-pin female in the controller (Main)¡bis bad or unstable.
ƒ_Reconnect or repair the contact in the connector.
•The wire harness between hall sensor in the MOTOR and PWB
assembly (Main) is cut (open circuited).
ƒ_Repair/replace the damaged WIRE HARNESS.
•The hall sensor is out of order/defective.
ƒ_Replace the motor.
•The controller (Main) is out of order/defective.
ƒ_Replace the PWB assembly (Main).
•PWB assembly (Main) is out of order.
ƒ_Replace the PWB assembly (Main).
•Winding in the MOTOR is short-circuited.
ƒ_Replace the MOTOR.
•The connector (3-pin, male, white) in the wire harness is not connected
to the connector (3-pin, female, white) of MOTOR.
ƒ_Reconnect or repair the connector.
•The electric contact between the connectors¡a3-pin, male, white in the
wire harness and 6-pin, female, white in the PWB assembly (Main)¡bis
bad or unstable.
ƒ_Reconnect or repair the contact in the connector.
•The wire harness between the MOTOR and PWB assembly (Main) is
cut (open circuited).
ƒ_Repair the damaged (open-circuited) WIRE HARNESS.
•The hall sensor is out of order/defective.
ƒ_Replace the PWB assembly (Main).
SENSOR
ERROR
CURRENT
ERROR
LOCK
ERROR
16

17
9-1. DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION
9. ERROR DIAGNOSIS AND CHECK LIST
SYMPTOM GUIDE FOR 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 II EEdisplayed?
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 GUIDE FOR 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 OO EEdisplayed?
Is the debris filter clogged with foreign
material such as pins, coins, and etc.?
Is the drain hose frozen with water, kinked,
or crushed?
Visit to check.
Close the door
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 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 function such
as drain, water input, and pause will operate without rotating the
drum.

20
9-2. 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)
(2)
(5) (6)
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)
NO POWER
■ WD(M)-8070F(H)B, WD(M)-1070(5)F(H)B, WD(M)-1170(5)F(H)B, WD(M)-1270(5)F(H)B, WD(M)-1370(5)F(H)B
WD(M)-8074F(H)B, WD(M)-1074(6)F(H)B, WD(M)-1174(6)F(H)B, WD(M)-1274(6)F(H)B, WD(M)-1374(6)F(H)B
WD-8078FHB, WD-1078FHB, WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB