LG WM3431H Series User manual

WASHING MACHINE
SERVICE MANUAL
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
MODEL: WM3431H*/WM3434H*
WD-14312RD/WD-14316RD
CAUTION
Website: http://www.LGEservice.com [For U.S.A]
www.lg.ca [For CANADA]
E-mail: http://www.LGEservice.com/techsup.html
!

JAN. 2005 PRINTED IN KOREA P/No.: 828ER 0 5Q

CONTENTS
1. SPECIFICATIONS .........................................................................................................................
2. FEATURES & TECHNICAL EXPLANATION ................................................................................ 4
. PARTS IDENTIFICATION ............................................................................................................ 6
4. INSTALLATION & TEST ............................................................................................................... 7
5. OPERATION ................................................................................................................................10
6. WIRING DIAGRAM/PROGRAM CHART.....................................................................................12
7. TROUBLESHOOTING.................................................................................................................1
7-1. BEFORE PERFORMING SERVICE ...................................................................................1
7-2. QC TEST MODE.................................................................................................................1
7- . HOW TO CHECK THE WATER LEVEL FREQUENCY ......................................................1
7-4. ERROR DISPLAY ...............................................................................................................14
8. ERROR DIAGNOSIS AND CHECKLIST .....................................................................................16
8-1. DIAGNOSIS AND SOLUTION FOR ABNORMAL OPERATION ........................................16
8-2. FAULT DIAGNOSIS AND TROUBLE SHOOTING .............................................................19
9. DISASSEMBLY INSTRUCTIONS ...............................................................................................29
10. EXPLODED VIEW ..................................................................................................................... 8
10-1. CABINET & CABINET COVER ASSEMBLY..................................................................... 8
10-2. CONTROL PANEL & DISPENSER ASSEMBLY............................................................... 9
10- . DRUM & TUB ASSEMBLY................................................................................................40
10-4. DRYER .............................................................................................................................41
2

3
1. SPECIFICATION
WM3431H , WD-14312RD, WD-14316RD* WM3434H*
WASHING
SPIN
FAN MOTOR
DRAIN MOTOR
WASH HEATER
DRY HEATER
WASH
SPIN 0-1400 rpm 0-1200 rpm
ELECTRIC
POWER
CONS MPTION
ITEM
POWER S PPLY
PROD CT WEIGHT
REVOL TION
SPEED
OPERATIONAL WATER PRESS RE
CONTROL TYPE
WASH CAPACITY
DRY CAPACITY
DIMENSIONS
CYCLES
WASH/RINSE TEMPERAT RES
SPIN SPEEDS
OPTIONS
DELAY WASH
DOOR S W ITCH TYP E
WATER LEVEL
LA NDRY LOAD SENSING
ERROR DIAGNOSIS
POWER A TO OFF
CHILD LOCK
A TO RESTART
AC 120 V, 60 Hz
147 lbs. (68 kg)
140 W
410 W
25 W
80 W
1000 W
1200 W
50 rpm
4.5-145 psi (30-1000 kPa)
Electronic
2.11 cu. ft
8
1316 lbs. (4 kg )
23 " (W) X 25 " " (D) X 33 (H)
9
5
5
Soak, Extra Wash, Rinse+Spin, Spin Only, Dry Only, Delay Wash, Extra Rinse
up to 19 hours
Bi-Metal
Incorporated
Incorporated
10 steps (by sensor)
Incorporated
Incorporated
Incorporated
38 14 38

2. FEATURES & TECHNICAL EXPLANATION
4
2-1.FEATURES
 Automatic Process From Washing To Drying
Automatic process from washing to drying can be
selected easily.
 More economical by using 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 directly drives the
drum without belt and pulley.
 Child-Lock
The Child-Lock prevents children from pressing any
button to change the settings during operation.
 Built-in Heater
Internal heater automatically heats the water to the
optimal temperature on selected cycles.
 Low noise speed control system
By sensing the amount of load and balance, it evenly
distributes load to minimize the spinning noise level.
 Auto Restart
If the washing machine is turned off by a power failure, it
will restart automatically from the position it stopped.

5
2-2. NEURO FUZZY WASHING TIME OPTIMIZATION
To get the best washing performance, optimal time is determined by the water temperature,
the selected washing temperature, and the size of the load.
2- . WATER LEVEL CONTROL
This model incorporates a pressure sensor which can sense the water level in the tub.
The water supply is stopped when the water level reaches the preset level, the washing
program then proceeds.
Spinning does not proceed until the water in the tub drains to a certain level.
NEURO-
FUZZY
load
size
selected
washing
temperature
water
temperature
washing time
rinsing time
spin rhythm, time
the best
washing
performance
SENSING PROCESSING DETERMINATION EFFECT

. PARTS IDENTIFICATION
6
ACCESSORIES
울
란제리
란제리

4. INSTALLATION & TEST
7
Before servicing, ask the customer what the trouble is.
Check the setup (power supply is 120 V AC, remove the transit bolts....).
Check with the troubleshooting guide.
Plan your service method by referring to the disassembly instructions.
Service the unit.
After servicing, operate the appliance to see whether it functions correctly.
STANDARD INSTALLATION
The appliance should be installed as follows:
REMOVE THE SHIPPING INSTALL THE APPLIANCE ADJUST THE
BOLTS
ON A FLAT AND FIRM SURFACE LEVELING
Remove the 4 shipping bolts Turn the leveling feet to adjust
with the supplied wrench. the appliance.
Do lower bolts first remove
easily.
Keep the shipping bolts and
wrench for future use.
Insert the 4 caps
(provided) into the hole.
Turn clockwise to raise;
counterclockwise to lower.

8
HOW TO CONNECT THE INLET HOSE
Verify that the rubber washer is inside of the
valve connector.
Tighten the inlet hose securely to prevent leaks.
CONNECT THE DRAIN HOSE
CONNECT POWER PLUG
The end of the drain hose should be placed less than 96 ” from the floor.
Connect the power plug to the wall outlet. Washer should be connected to dedicated
circuit.
Make sure that the hose is not twisted. Avoid submerging the end of the hose.

9
MAXMAX
max
Connect the power plug to
the outlet.
Connect the inlet hose.
Preparation Press the POWER button. Press the Start/Pause
for washing. button.
Press the Wash/Rinse 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.
Check if the door can be
opened after minutes.
• Power off and power on.
• Press the Spin Speed button.
• Press the Start/Pause button.
• Check the spin and drain
functions.
If SVC is needed, remove the
remaining water by pulling out
the hose and removing the
cap.
Check the water heating Check automatic reverse Check the water supply.
function. rotation.
Check drain and spin Power off and open the Water removal
functions. door
TEST OPERATION