LG WD-1412RD User manual

100
WASHING MACHINE
SERVICE MANUAL
READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLES
CORRECTLY BEFORE OFFERING SERVICE.
MODEL : WD-1412RD
WD-14120(5, )RD
WD-12120(5)RD
WD-10120(5)RD
CAUTION

101
MAY. 2002 RINTED IN KOREA /No.:3828ER3008T

CONTENTS
1. S ECIFICATION............................................................................................................................3
2. FEATURES & TECHNICAL EX LANATION ................................................................................ 4
3. ARTS IDENTIFICATION ............................................................................................................ 6
4. INSTALLATION ............................................................................................................................. 7
5. O ERATION ................................................................................................................................10
6. WIRING DIAGRAM / ROGRAM CHART...................................................................................14
7. TROUBLE SHOOTING................................................................................................................15
7-1.BEFORE SVC CHECKING ..................................................................................................15
7-2.QC TEST MODE..................................................................................................................15
7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY.........................................................15
7-4.ERROR DIS LAY ................................................................................................................16
8. ERROR DIAGNOSIS AND CHECK LIST ....................................................................................18
8-1. DIAGNOSIS AND ANSWER FOR ABNORMAL O ERATION ...........................................18
8-2. FAULT DIAGNOSIS AND TROUBLE SHOOTING .............................................................21
9. DISASSEMBLY INSTRUCTIONS ...............................................................................................31
10. EX LODED VIEW AND ARTS LIST .......................................................................................41
10-1. THE EX LODED VIEW OF CABINET ASSEMBLY .........................................................41
10-2. THE EX LODED VIEW OF CONTROL ANEL AND DIS ENSER ASSEMBLY ............42
10-3. THE EX LODED VIEW OF DRUM AND TUB ASSEMBLY .............................................43
10-4. THE EX LODED VIEW OF DRYER ................................................................................44
APPENDIX (Replacement parts list) ...........................................................................................45
2

3
1. SPECIFICATION
ITEM WD-1412RD / WD-14120(5)RD / WD-12120(5)RD / WD-10120(5)RD
PO WER SUPPLY 220V-240V~, 50 Z
PRODUCT WEIG T 71kg
WAS ING 140W
SPIN 300W
FAN MOTOR 25W
DRAIN MOTOR 40W
WAS EATER 2000W
DRY EATER 2100W
WAS 45rpm
SPIN
WD-1412RD/WD-14120(5,6)RD 400/800/1000/1400 rpm
WD-12120(5)RD 400/800/1000/1200 rpm
WD-10120(5)RD 400/600/800/1000 rpm
OPERATION WATER PRESSURE 0.3-10kgf/cm
2
(30-1000kPa)
CONTROL TYPE Electronic
WAS CAPACITY 7.0kg (Cotton)
DRY CAPACITY 4.0kg (Cotton)
DIMENSION 600mm(W)×600mm(D)×850mm( )
WAS PROGRAM
Cotton, Cotton-Eco, Synthetic, Delicate, Wool, and Wash, Quick 30
RINSE Normal / Super / Rinse old
DOOR SWITC TYPE Manual
WATER LEVEL 8 steps (by sensor)
RESERVATION From 3 hours to 19 hours
SENSING OF T E LAUNDRY AMOUNT Adapted
FUZZY LOGIC Adapted
DISPLAY OF T E REMAINING TIME Adapted
ERROR DIAGNOSIS 10 items
POWER AUTO OFF Adapted
C ILD LOCK Adapted
AUTO RESTART Adapted
TIME SAVE Adapted
ELECTRICITY
CONSUMPTION
REVOLUTION
SPEED

Automatic process from washing to drying.
Automatic process from washing to drying can be
selected easily.
Washing capacity : 7 kg (Cotton)
Drying capacity : 4 kg (Cotton)
More economical by Intelligent Wash System
Intelligent Wash 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.
Direct Drive system
The advanced Brushless DC motor rotates the Drum directly
without belt and pulley.
Child- ock
The Child-Lock system has been developed to prevent
children from pressing any button to change the program
during operation.
ow noise speed control system
By sensing the amount of load and balance, evenly distributes
load to minimize the spinning noise level.
Auto Restart
Although the washing machine is turned off by a power failure, it
restarts automatically in its stopped process when power is
supplied again. And it will be the same when the machine
unplugged in operation is plugged in again.
2. FEATURES & TECHNICAL EX LANATION
4
2-1.FEATURES
Wash Rinse

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.
5
FUZZY
LOGIC
laundry
amount
selected
washing
temperature
water
temperature
washing time
rinsing time
spin rhythm, time
the best
washing
performance
SENSING
ROCESSING DETERMINATION
EFFECT

3. ARTS IDENTIFICATION
6
ACCESSORIES
ower 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.
Spanner

Before servicing ask troubles of customers
Check the adjustment(power supply is 220-240V~, 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 K or NOT.
STANDARD INSTALLATION
The appliance should be installed as follows.
REMOVE THE TRANSIT INSTALL THE A LIANCE ADJUST THE
BOLTS ON FLAT AND FIRM SURFACE HORIZONTAL
Remove the transit bolts Turn the leveling feet to
(3EA: )with supplied spanner. set the appliance horizontally.
Keep the transit bolts and
spanner for future use.
Insert the 3 caps
provided into the hole
The appliance goes up by
rotating the feet clockwise.
The appliance come down by
rotating the feet counter
clockwise.
4. INSTALLATION
7
1
2
Low
High

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 OWER LUG
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 the fire.
Avoid submerging the end of the hose.

TEST O ERATION
9
Power
Start/Pause
Power
Connect the power plug to
the outlet. In case of Coloreds program.
Connect the inlet hose.
reparation for ress the OWER button. ress the Start/ ause
washing. button.
ress 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.
ower off and then power on.
Check if the door can be
opened after 3 minutes.
Turn off Wash and Rinse after
pressing the Start/ ause 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 ower off and open the Water removal
door

10
5. O ERATION
5-1) O ERATION-1

11

12
5. O ERATION
5-1) O ERATION-2

13

14
6. WIRING DIAGRAM / ROGRAM CHART
MAIN WB
NA
YL
YL
BLBL RD
WH
RD
RD
FUSE
DOOR LOCK S/W
DRAIN
MOTOR
UVW
BK
BK
BL BN
GN
/
YL
GN
/
YL
VL
/
WH
WH
/
RD
BL
/
RD
YL
/
RD BN
/
YL
WH
/
BK
GY
/
WH
YL
/
BK
YL
/
RD
BN
/
YL
S
K
Y
BK
/
WH
RD
/
WH
GN
/
YL
WH
WH
BK
BK
BL BN
RD
C
C
C
WASHING
HEATER
POWER
CORD
DRY
HEATER
THER-
MOSTAT
INLET
VALVE
Ha Hb
GND
MOTOR
FAN MOTOR
PRESSURE
SENSOR
n
IN CONNECTOR NUMBER
TERMINAL+HOUSING (#250)
EARTH TERMINAL
WIRE COLOR: BASE/LINE
(S) (S)
(G)
THERMISTOR THERMISTOR
(Dry Duct Dry H/T) (Tub)
D
R
Y
M
A
I
N
R
E
BKWH BK YL OR BL BL RD YL BL RD
RDBK
YL BK
/
WH
BN GY K
123456
123456
123456
123
123
123
123
123
123 456 123 123
123
123
123
1
2
3
1
1
123
123
1234
14
1
23
23 4
14
1
23
23456
12345
12345
123
123
123
12 12 12 12 123
DIS LAY
WB
WH NARD RD RD SKY BL RD WHWH
NA
WHWH
WH
/RD
WH/RD
WH WH
NA
VL NA
NOISE
FILTER
12 12
* Water Supply : WáS * Intermittent Spin : IáS * Disentangle : DáT
*Basic Cycle
* Optional Cycle
* ~ Time for varies as the temperature or the amount of laundry.
* Pre-Setting Time : Water Supply - 120 sec.
Drain - 60 sec.
Wash Rinse Spin
W
á
S
Pre Main
Washing
Drain
I
á
S
W
á
S
Rinse
Washing Staycooling
Heat
Wash
Drain
W
á
S
1 2 3 7654 98 10
Normal (Hold)
Drain
I
á
S
11 12
1
W
á
S
Rinse
13 14
Drain
I
á
S
15 16
2
W
á
S
Rinse
17 18
Drain
I
á
S
19 20
W
á
S
Rinse
21 22
Drain
I
á
S
23 24
W
á
S
Rinse
25 26
Extra (Hold)
Drain
Spin
DáT
A
U
T
O
O
F
F
34
27 28 29 20
ED
R
YN
D
20
Cotton
Cotton-Eco
Quick 30
Normal
Working
Time
(Hour:Minute)
About 2:43(2:41)
120 MIN 60 MIN 120300 60120 60 60 300 120 360 60 300 120 360 60 300 120 360 60 300 120 360 60 600 120 20 20
C
Y
C
L
E
S
T
E
P
C
O
U
R
S
E
Time
(SEC)
860
96
About 3:03
About 30
8
HandWash
Delicate
Wool
Wash
Rinse
Rinse Hold
Wash
+ Rinse
12
About 1:01
About 1:01
About 1:00
About 1:50
About 39
23
8
Spin
Dry
About 39
About 2:21
About 15
Rinse
+ Spin
Wash
+Spin
About 2:29
About 1:44
About 39
8
8
1
40
29
29
1
1
1
~
96
60
~
60
~
96
60
96
Synthetic About 1:30
823
59
PROGRAM CHART
* Basic time is minute in washing chart
* The actual program time can be varied with the load amount,
water temperature or ambient temperature

15
7. TROUBLE SHOOTING
7-1.BEFORE SVC CHECKING
Be careful of electric shock or disconnecting the parts while trouble shooting.
Voltage of each terminal in 220-240V~ and DC while applying an electric current.
7-2.QC TEST MODE.
ressing Rinse, and Spin button simultaneously.
ower supply ON with pressing upper two button.Then buzzer sound twice.
ress the Start/ ause button as follows.
ress the Start/ ause button more 4 times until stop spinning
7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY
ress the Rinse and Spin button simultaneously.
ex) 241 : Water level frequency = 241 10-1
=24.1
7-4.HOW TO KNOW TO TEM ERATURE OF EACH THERMISTOR
AT O ERATING CONDITION.
■ Thermistor in tub : ress the [WATER TEM ] button.
■ Thermistor in dry duct : ress the [DRY] button.
■ Thermistor in condensing duct : ress the [S IN] and [DRY] button simultaneously.
The digits means water level frequency(10-1 )
ressing number of
Start/ ause button
Checking oint Display Status
None All lamps turn on
1 time Clockwise spin(right) Drum rpm(About 40~52)
2 times Low speed Spin Drum rpm(About 70~90)
3 times High speed Spin Drum rpm(About 90~110)
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)
6 times Inlet valve for dry operation Water level frequency(25~65)
7 times Counterclockwise spin(left) Drum rpm(About 40~52)
8 times
Heater is in operation for 3 sec. Water temperature
9 times Draining pump operation Water level frequency
10 times
Dry operation for 6 minutes Auto off operation after 6 minutes

16
7-5.ERROR DIS LAY.
If you press the Start/ ause button in error condition, 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., 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 , power will not be turned off.
ERROR SYM TOM CAUSE
1
2
3
4
5
6
7
• Not reached to the water level(2 level)within 4
minutes after water supplied or not reached to
the preset water level within 25 minutes.
• Not fully drained within 5 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 RESSURE
S/W ERROR
DOOR O EN
ERROR
IMBALANCE
ERROR
HEATING
ERROR

17
ERROR SYM TOM CAUSE
8
9
10
• MAIN WB ASSEMBLY is out of order
Replace the MAIN WB ASSEMBLY
• Winding in the STATOR ASSEMBLY is short-circuited.
Replace the STATOR ASSEMBLY
• “ ” is dispplayed during a high spin
Replace the LEAD WIRE ASSEMBLY (MOTOR)
• 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 WB ASSEMBLY
Reconnect or repair the connector
• The Dry fan motor is out of order
Replace the fan Motor.
CURRENT
ERROR
MOTOR
ERROR
DRY
HEATOR
ERROR

18
8-1.DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION
8. ERROR DIAGNOSIS AND CHECK LIST
SYMPTOM GUIDE FOR SERVICE CALL
NO POWER
Water nlet trouble
YES
YES
YES
NO
NO
YES
NO
NO
No Inlet
Is the power plug connected f rmly to
220-240V~ outlet?
Power fa lure? or Breaker opened?
V s t to check
Is " " d splayed?
Is the tap opened?
Is the tap frozen?
Is the water supply shut-off?
Is f lter n the nlet valve clogged w th
fore gn mater al?
V s t to check
Clean the f lter of
nlet valve

19
SYMPTOM
• Door does not open
• Error displayed on
the program
• DRAIN ROUBLE
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.
.