LG WD14750SD, WD14756SD Service Manual
WASHING MACHINE
SERVICE MANUAL
READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLES
CORRECTLY BEFORE OFFERING SERVICE.
MODEL : WD14750SD / WD14756SD
CAUTION
MAR. 2007 PRINTED IN KOREA
P/No.: MFL30138919
CONTENTS
1. SPECIFICATION............................................................................................................................3
2. FEATURES & TECHNICAL EXPLANATION ................................................................................ 4
3. PARTS IDENTIFICATION ............................................................................................................ 6
4. INSTALLATION ............................................................................................................................. 7
5. OPERATION ................................................................................................................................10
6. WIRING DIAGRAM / PROGRAM CHART...................................................................................12
7. TROUBLE SHOOTING................................................................................................................13
7-1.BEFORE SVC CHECKING ..................................................................................................13
7-2.QC TEST MODE..................................................................................................................13
7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY.........................................................13
7-4.
HOW TO KNOW TO TEMPERATURE OF EACH THERMISTOR AT OPERATING CONDITION
......13
7-5.ERROR DISPLAY................................................................................................................14
8. ERROR DIAGNOSIS AND CHECK LIST ....................................................................................16
8-1. DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION ...........................................16
8-2. FAULT DIAGNOSIS AND TROUBLE SHOOTING .............................................................19
9. DISASSEMBLY INSTRUCTIONS ...............................................................................................25
10. EXPLODED VIEW AND PARTS LIST .......................................................................................33
10-1. THE EXPLODED VIEW OF CABINET ASSEMBLY .........................................................33
10-2. THE EXPLODED VIEW OF CONTROL PANEL AND DISPENSER ASSEMBLY ............34
10-3. THE EXPLODED VIEW OF DRUM AND TUB ASSEMBLY .............................................35
2
ITEM
PO
WER SUPPLY 220V-240V~, 50Hz
PRODUCT WEIGHT 56kg
WASHING 140W
SPIN 440W
DRAIN MOTOR 40W
STEAM HEATER 1100W
WASH HEATER 2000W
WASH 50rpm
SPIN No Spin/400/600/800/1000/1200/1400
OPERATION WATER PRESSURE 0.5-8.0kgf/cm
2
(50-800kPa)
CONTROL TYPE Electronic
WASH CAPACITY 7.5kg
DIMENSION
600mm(W)x590mm(D)x850mm(H)
WASH PROGRAM
Cotton, Synthetic, Delicate, Hand Wash/Wool, Duvet, Quick30, Rinse+Spin, Refresh, Baby Care
RINSE Normal, Rinse+, Rinse++, Rinse+Hold
DOOR SWITCH TYPE Bi-Metal type
WATER LEVEL 10 steps (by sensor)
RESERVATION From 3 hours to 19 hours
SENSING OF THE LAUNDRY AMOUNT Adapted
FUZZY LOGIC Adapted
DISPLAY OF THE REMAINING TIME Adapted
ERROR DIAGNOSIS 10 items
POWER AUTO OFF Adapted
CHILD LOCK Adapted
AUTO RESTART Adapted
TIME SAVE Adapted
3
1. SPECIFICATION
ELECTRICITY
CONSUMPTION
REVOLUTION
SPEED
WD14750SD / WD14756SD
2. FEATURES & TECHNICAL EXPLANATION
4
2-1.FEATURES
Direct Drive System
The advanced Brushless DC motor directly drives the drum without
belt and pulley.
Water Circulation
Spray detergent solution and water over the load over continu.
Clothes are soaked more quickly and thoroughly during wash cycle.
The detergent suds can be removed more easily by the water shower during
rinse cycle. The water circulation system uses both water and detergent more
efficiently.
Built-in Heater
Internal heater automatically heats the water to the best temperature on selected
cycles.
Child Lock
The Child lock prevents children from pressing any button to change the settings
during operation.
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.
Low noise speed control system
By sensing the amount of load and balance, it evenly distributes load to minimize
the spinning noise level.
Safety device (Aqua lock)
Aqua lock System is designed for detecting water leak during operation to
prevent water from spilling on the floor.
Steam Washing and Refresh
Steam Washing features upgraded washing performance with low energy
consumption. Refresh cycle reduces wrinkles from dry clothes.
Automatic Wash Load Detection
Automatically detects the load and optimizes the washing time.
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.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
rinsing time
spin rhythm, time
the best
washing
performance
SENSING
PROCESSING
DETERMINATION
EFFECT
Inlet hose(1EA)
Option : Hot/Cold(2EA)
Spanner
3. PARTS IDENTIFICATION
6
■ ACCESSORIES
Drawer
Cold Water Inlet
❋ Cold Only ❋ Hot/Cold
Cold Water Inlet
Hot Water Inlet
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 trouble shooting.
Decide service steps referring to disassembly instructions.
And 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 INSTALL THE APPLIANCE ADJUST THE
BOLTS ON FLAT AND FIRM SURFACE HORIZONTAL
Remove the transit bolts Turn the leveling feet to
(4EA:①)with supplied spanner. set the appliance horizontally.
Keep the transit bolts and
spanner for future use.
Insert the provided 4 caps
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
■ 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
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
MAXMAX
Connect the power plug to
the outlet. In case of Coloreds program.
Connect the inlet hose.
Preparation Press the POWER button. Press
the
Start/Pause
for button.
washing.
·Check if the drum rotates ·Check if water is supplied
clockwise and counterclockwise.
through the detergent dispenser.
·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.
·Press the Rinse+Medic Rinse
button simultaneously and the
present temperature will be
displayed.
·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
• Use this button to turn the
power On/Off.
• Rotate the Cycle selector
knob to select the cycle
designed for different
types of fabric and soil
levels.
• Use this button to Start/
Stop the washer.
• By pressing the Steam Wash
button, Steam Function is
selected, light on Steam
Wash button LED
• Allows the start of any cycle
to be delayed for 3~19
hours.
• Select a water temperature
based on the type of load you
are washing.
• By pressing the Rinse button,
the Rinse type can be selected.
Cycle Selector Time Delay
Power
Start/Pause Steam Wash Rinse, Temp. Button
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