LG WF-T851 Bedienungsanleitung

WASHING MACHINE

SERVICE MANUAL

MODEL : WF-T851 / T852 / T853 / T802 / T902

WF-T652(T652A) / T452(T452A) / 402

CAUTION

BEFORE OFFERING SERVICE, READ THIS MANUAL

CAREFULLY TO DIAGNOSE

TROUBLES CORRECTLY.

CONTENTS

11. SPECIFICATIONS ......................................................................................................................3

12. FEATURES & TECHNICAL EXPLANATION..............................................................................4

13. PART IDENTIFICATION ...........................................................................................................12

14. INSTALLATION INSTRUCTION...............................................................................................15

15. SCHEMATIC DIAGRAM...........................................................................................................18

16.OPERATING INSTRUCTION ....................................................................................................20

7.PROGRAM CHART...................................................................................................................34

18. TEST RUNNING WITHOUT WATER........................................................................................41

09. ADJUSTMENT..........................................................................................................................45

10. DISASSEMBLY INSTRUCTION...............................................................................................46

11.TROUBLE SHOOTING METHODS ACCORDING TO ERROR MESSAGE .............................52

12. HOW TO DIAGNOSE AND REPAIR BY SYMPTOM................................................................56

13. EXPLODED VIEW ...................................................................................................................67

14. RPL

󱇧DISASSEMBLE POWER CORD BEFORE SERVING

󱇧RECONNECT ALL GROUNDING DEVICES

IMPORTANT SAFETY NOTICE !

This service information is intended for individuals

possessing adequate backgrounds of electrical,

electronic and mechanical experience.

Any attempt to repair this appliance may result in

personal injury or property damage.

The manufacturer or seller can not be responsible

for the interpretation of this information, nor can it

assume any liability in connection with its use.

CAUTION !

POWER SOURCE

CAPACITY

WASH TYPE

WEIGHT(NET)

DIMENSION(mm)

EX-LARGE

LARGE

MEDIUM

SMALL

OPERATION WATER

PRESSURE

PULSATOR rpm

SPIN rpm

WASHING PROGRAMS

LINT FILTER

PULSATOR(Ø)

PUNCH(Ø)

WATER FALL

SOFTENER DISPENSER

ITEM WF-T902 WF-T851 WF-T853

WF-T802/T852

WF-T652(A) WF-T452(A) WF-402

Refer to rating label on the back of washer

IMPELLER TYPE

47 kg 41 kg 32 kg

98ℓ94ℓ78ℓ55ℓ

76ℓ70ℓ64ℓ48ℓ

62ℓ55ℓ54ℓ35ℓ

45ℓ40ℓ44ℓ25ℓ

190ℓ 170ℓ110ℓ

30kpa~800kpa(4 p.s.i ~115 p.s.i)

110 ~ 140

660 740 730

1. SPECIFICATIONS

WATER

LEVEL

(7 LEVELS)

STANDARDWATER

CONSUMPTION

(NORMAL&EX-LARGE

WATERLEVEL)

NORMAL,

SPEEDY,

JEAN,

DELICATE,

WOOL,

FAVOURITE

DOUBLE

395

Ø 90

THREE AUTOMATICº

Ø 74

TWO ONE

375 325

SINGLE

NORMAL, HEAVY,

SPEED, WOOL NORMAL,

DELICATE,

SPEEDY,

JEAN,

WOOL,

FAVOURITE

NORMAL, HEAVY,

SPEEDY, WOOL

625(W)x625(D)x1007(H)mm

590(W)x606(D)

x958(H)mm

632(W)x688(D)

x1029(H)mm

632(W)x688(D)

x1045(H)mm 540(W)x540(D)

x850(H)mm

530(W)x540(D)

x850(H)mm

FEATURES & TECHNICAL EXPLANATION

󱇧󱇧FUZZY LOGIC CONTROL

2-1.FUZZY CONTROL DIAGRAM

■

The clothes amount sensor detects loads

working on the motor by measuring pulse

number of the electromotive force which

occured after motor power is off.

Clothes amount sensor

FUZZY REASONING

measuring loads by

turning the pulsator

2 times

measured pulse

number (X1)

Clothes kindClothes amount

1.WATER LEVEL 3.WASH TIME

2.CURRENT CIRCULATION 4.SPIN TIME

(WASH ACTION)

measured pulse

number (X2) measured pulse

number (X3) measured pulse

number (X4)

measuring loads by

turning the pulsator

2 times

measuring loads by

turning the pulsator

2 times

measuring loads by

turning the pulsator

2 times

Et Ew

decision

Ew=(X3×X4)-(X1+X2)

Voltage

Reverse electromotive

force

2-2.COMPARISON OF FUZZY WASHER & CONVENTIONAL WASHER

Fuzzy

Washer

Low High

It senses and controls

the categories between

yes and no.

Start Washing Auto

power off

Sensing Fuzzy Control Auto Setting

Laundry

amount

sensor Fuzzy

Reasoning

#Water Level

#Wash Time

#Wash Action

#Spin Time

Water

Level

sensor

Conven-

tional

Washer

Low High

It works according to

the selection of

yes and no.

Start Washing Manual

power off

Manual Setting(WF-T902, T851, T802)

Water

Level Wash

Time Spin

Time

AUTOMATICALLY

Washing Process

Control Concept

☞

2-3. TURBO DRUM WASH (Except for WF-4020

A) FUNCTIONAL PRINCIPLE

■Pulsator rotates right & left direction by motor driving force and drum rotates in the opposite direction to

the pulsator by inertia force & motor driving force, that is achieved by the new clutch and the new drain

motor, while only pulsator rotates right & left in a conventional washer.

ⓕ

ⓒ

ⓓ

ⓖ

ⓔ

ⓑ

ⓐ

󱃪DRUM

󱃩PULSATOR

OUTER TUB

󱃦MOTOR

󱃧V-BELT 󱃨CLUTCH

·The drum is possible to rotate by the new clutch removing the counter

revolution-protecting device, changing the clutch spring-B to the dual

actuating type and releasing the brake band which is activated by the

new drain motor operated with two steps.

·Revolution speed step down as follows.

MOTOR C-PULLEY PULSATOR

DRUM

WASH

SPIN

DRUM

V-belt Planet. gear

(1/5~5.2)

Directly

B) WORKING PRINCIPLE BY PROCESS

SENSING

LAUNDRY

AMOUNT

WASH

RINSE DRAIN SPIN

1. Clutch mechanism

·Clutch

Spring-B(ⓒ)

·Brake Band(ⓓ)

·Clutch Lever

3. Wash Motor

2. Drain Motor

·SW1

·SW2

4. Power transmitting

Sequence ① 󱈚 ② 󱈚 ⓐ

󱈚 ⓔ ⓕ 󱈚 ④

󱉝 Pulsator

ⓖ & ⑤

󱉝 Drum

(Drum rotates mainly

by reacted force to

pulsator action)

① 󱈚 ② 󱈚 ④ ① 󱈚 ② 󱈚 ⓐ 󱈚 ⓑ 󱈚 ⓒ 󱈚 ⓖ 󱈚 ⑤

Do not work

OFF

Rotates at

bidirection Rotates at

one direction

Doesn’t rotate

1st step moved

OFF

2nd step moved

(Drain Valve open)

2nd step moved

(Drain Valve open)

·Released

·Fastened

·Do not work

·Released

·1st step moved

·Fastened

·Released

·2nd step moved

·Fastened

·Released

·2nd step moved

5. Working State of

Clutch & Drain

Motor

Pulsator rotates at

bidirection Pulsator & Drum

rotates at bidirection

each other

Pulsator & Drum

doesn’t rotates Drum rotates

at one direction

C) STRUCTURE OF THE NEW CLUTCH

D) DRAIN MOTOR & CIRCUIT DIAGRAM

SW1

SW2

WASH SPIN

PINK BL / WH

1 3

AC(Rating

Voltage)

Two clutch cams

3Pin

󱃨󱃧󱃦

Two clutch bosses

2-4. REED SWITCH FOR APPLIANCE SAFETY(WF-402, T652A, T452A)

2-5. BALL PRESSURE SENSOR

Interrupt system of reed S/W is differed from safety S/W incorporated in the

previous models. Reed S/W is located on PWB ASM and operated with a magnetic

incorporated inside of Lid-B systemically. If Lid is the closed position, the magnetic

operates the contact of Lid S/W. In this case, the machine can do the normal

operation because the current pass through the contacts. On the other hand, the

contacts is open after Lid is the open position, the machine is stoped because the

magnetic is far from the Reed S/W. So do not place any electric appliance with a

charging battery, magnetically-driven appliance and magnetic body on the washer.

It makes misoperation of washing machine process.

To detect unbalance, the electronic sesing system is used which is differ from safety

S/W incoporated in the previous models. In the abnormal operation like unbalance

of clothes during spinning, etc, the ball inside of sensor is moved. In this case the

inductance of sensor is differ from the initial condition. So micom sense the

unbalance condition by ball movement. Ball pressure sensing system is higher

safety performance, sesing vertical movements and no deformation and noise by

over of safety S/W.

LC Harmonic frequency

Normal

Condition

Unbalavced

Condition

Inductance [mH]

[Hz]

[Sec]

h[mm]

0 100 200 300 400 500

-5

0 100 200 300 400 500 600

2-7. AUTOMATIC CORRECTION FOR THE UNBALANCED LAUNDRY

DURING SPINNING

When an unbalance of laundry occurs during spinning the unbalance will be automatically corrected

1times but 2nd unbalance will make the machine stop and “UE” is on the DISPLAY.

In that case, open the lid, correct the unbalance and press the START/PAUSE button.

2-8. LID SWITCH FOR APPLIANCE SAFETY (WF-T851, T902)

Interrupt system of LID SWITCH is differed from SAFETY SWITCH incorporated in the others models. LID

SWITYCH is located on TOP COVER and operated with a magnetic incorporated inside of LID-B

systemically. If LID is the closed position, the magnetic operates the contact of LID SWITCH. In this case,

the machine can do the normal operation because the current pass through the contacts. On the other hand

the contacts is open after LID is the open position, the machine is stopped because the magnetic is far from

the LID SWITCH.

Top Cover

Lid-B

Magnet(inside)

2-6.TRIPLE WATER FALL SYSTEM

󱇧

The washing and rinsing effects have been improved by adopting the water system in

which water in the tub is circulated in a designed pattern. When the pulsator operates during

the washing or rinsing process, water below the pulsator is sucked upwards by the rotation of

the pulsator vanes, creating a water flow as shown in Fig 1.

The water is then discharged from the upper part of the tub through the water channel

provided. circulating water with level and clothes load only and regular water flow as shown

in Fig 2.

Pulsator

Tub Outer

Tub

Pulsator

vane

Water

channel

Clutch Motor

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