LG WD-P1410BRD, WD-14831RD, WD-1409RD1, WD-1409RD2, WD-1409RD3 Service Manual

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WASHING MACHINE

SERVICE MANUAL

CAUTION

READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLES
CORRECTLY BEFORE OFFERING SERVICE.

MODEL : WD-1409RD(1~9)/WDP1103RD(1~9)/WM3455H*

51

P/No.: MFL30574764

CONTENTS

1. SPECIFICATIONS ............................................................................................................................. 3

2. FEATURES & TECHNICAL EXPLANATION ..................................................................................... 4

3. PARTS IDENTIFICATION ................................................................................................................. 6

4. INSTALLATION .................................................................................................................................. 7

5. OPERATION ................................................................................................................................... 12

6. WIRING DIAGRAM / PCB LAYOUT / PROGRAM CHART ............................................................ 14

7. TROUBLESHOOTING......................................................................................................................18

7-1.BEFORE PREFORMING SERVICE ......................................................................................... 18

7-2.LOAD TEST MODE .................................................................................................................. 18

7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY ............................................................. 19

HOW TO KNOW TO TEMPERATURE OF EACH THERMISTOR AT OPERATING CONDITION

7-4.

7-5.ERROR DISPLAY ..................................................................................................................... 20

7-6.TROUBLESHOOTING WITH ERROR ..................................................................................... 21

• IE (Water Inlet Error) .............................................................................................................. 21

• UE (Unbalanced Error) ........................................................................................................... 22

• OE (Water Outlet Error) .......................................................................................................... 23

• FE (Flow over Error) ............................................................................................................... 25

• PE (Pressure Sensor S/W Error) ............................................................................................ 26

• DE (Door open Error) ............................................................................................................. 27

• tE (Thermistor (Heating) Error) ............................................................................................... 28

• LE (Motor Lock Error) ............................................................................................................. 29

• DHE (Dry Heater Error) .......................................................................................................... 31

• Dry Heater Trouble ................................................................................................................. 32

• Dry Fan Motor Trouble ............................................................................................................ 33

.. 19

8. TROUBLESHOOTING ELSE ..........................................................................................................34

• No Power ................................................................................................................................ 34

• Vibation & Noise in spin ......................................................................................................... 35

• Detergent & Softener does not flow in .................................................................................... 36

• Water Leak ............................................................................................................................. 37

9. DISASSEMBLY INSTRUCTIONS ................................................................................................... 39

10. EXPLODED VIEW ......................................................................................................................... 47

2

3

1. SPECIFICATION

ITEM

POWER SUPPLY

PRODUCT WEIGHT

OPERATION WATER PRESSURE

CONTROL TYPE

WASH & DRY CAPACITY

DIMENSION

WASH PROGRAM

RINSE

DOOR SWITCH TYPE

WATER LEVEL

RESERVATION

SENSING OF THE LAUNDRY AMOUNT

FUZZY LOGIC

DISPLAY OF THE REMAINING TIME

ERROR DIAGNOSIS

POWER AUTO OFF

CHILD LOCK

AUTO RESTART

TIME SAVE

ELECTRICITY

CONSUMPTION

WASHING

SPIN

DRAIN MOTOR

STEAM HEATER

WASH HEATER

DRY HEATER

REVOLUTION

SPEED

WASH

SPIN

No Spin/400/800/1000/1400

50rpm

1.0-8bar (100-800kPa)

Electronic

Refer to the Rating Label

600mm(W)x640mm(D)x850mm(H)

Cotton, Cotton Quick. Synthetic, Delicate, Hand Wash,Wool,

Quick30, Duvet, Baby Care

Rinse+Spin, Rinse+, Normal+Hold

Bi-Met

al type

10 steps (by senso

r)

From 3 hours to 19 hou

rs

Adapted

Adapted

Adapted

10 i

tems

Adapted

Adapted

Adapted

Adapted

140W

440W

30W

1100W

2000W

1500W

127V~, 60Hz

72kg

WD-1409RD(1~9)/WDP1103RD(1~9)/WM3455H*

2. FEATURES & TECHNICAL EXPLANATION

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.

Automatic Wash Load Detection

Automatically detects the load and optimizes the washing time.

4

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.

water

temperature

washing time

selected
washing

temperature

SENSING

laundry
amount

PROCESSING

FUZZY
LOGIC

rinse time

spin rhythm, time

DETERMINATION

EFFECT

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

the best
washing
performance

While program is operating.

While Door Lock light turns on.

5

3. PARTS IDENTIFICATION

Drawer

Drum

Door

Drain Hose

Shipping Bolts

Power Pulg

If the supply cord is damaged,
it must be replaced by the
manufacturer or its authorized
service technician in order to
avoid a hazard.

Control Panel

Drain Plug

Adjustable Feet

ACCESSORIES

Inlet hose(2EA)

Drain Pump Filter

Lower Cover Cap

Spanner

6

4. INSTALLATION

INSTALLATION

The appliance should be installed as follows.

1

Check the conditions of installation area.

1. Check level ground.

horizontal

On raised foundations or upper level homes, the vibrations can be caused by the type of flooring.
It may be necessary to move the machine to a different area in the home or have the floor
reinforced to properly support the operation of the unit.

2. Check humidity or any foreign objects under the feet.

Clean the floor, and there should not be any foreign objects under the feet.
If the unit has foreign objects underneath the feet, this will prevent the unit from being leveled properly
and will cause vibrations and slipping.

Remove any foreign objects, if any from underneath the machine and level unit properly.

See below for examples of foreign objects.

Purchased

Capet Paper Laminated

stopper

2

Open the box and check appliance condition.

Washer

Base Packing

Packing Support
(Packing support may not be used depending on models.)

Wrench

paper

This leveling (or spanner) wrench must
be used to remove the shipping bolts
and level the unit. This should be kept
for future use.

7

3

Use spanner to remove transit bolts.

Without removal of transit bolts

X 4 EA

Transit bolts

4

Confirm the distance between the appliance and the wall.

Spin noise and shaking.

More than 2cm

If the distance is less than 2cm,
the water supply hose will

kink or fold.

5

The tap connection and hose connection must be parallel.

1. Normal Tap without thread & screw type inlet hose.

1. Unscrew the fixing screw to

attach the tap.

Upper
Connector

Fixing screw

Rubber
packing

2. Push the connector up till the

rubber packing is in tight contact
with the tap. Then tighten the 4
screws.

Rubber packing

Upper
Connector

3. Push the water supply hose

vertically upwards so that the
rubber packing within in the hose
can adhere completely to the tap
and then tighten it by screwing it
to the right.

Upper
Connector

2. Normal Tap without thread & one touch type inlet hose (Single inlet models)

1. Untighten the upper connector

screw.

Upper
Connector

Fixing screw

• In case the diameter of the tap
is large remove the guide plate.

Guide plate

Rubber
packing

Middle
connector

Connector

2. Push the upper connector up

till the rubber packing is in
tight contact with the tap. Then
tighten the 4 screws.

Rubber packing

Upper
Connector

Middle
connector

• Turn the middle connector not to
have water leaked.

•Make sure that the rubber seal is
inside the hose connector.

3. Connect the water supply hose

to the middle connector, pushing
the plate down.

• To separate the water supply
hose from the middle connector
shut off the tap.
Then pull the inlet hose down,
pushing the plate down.

Plate

Water supply
hose

Upper
Connector

Water supply
hose

Plate

Hose connector

8

Rubber seal

• Make sure that there are no
kinks in the hose and that it is
not crushed.

6

Connect Drain Hose.

If the drain hose is not installed properly, the unit will not drain properly.
This allows water to back flow into the unit which can cause odors.
Refer to Owner Manual for proper drain hose installation.
The odor could also be coming from the home’s drain to which the drain hose is attached.

Laundry tub

about 100 cm

about 145 cm

Hose

Retainer

Tie

strap

about 105 cm

max. 100 cm

min. 60 cm

Max. 100cm

min. 60cm

In this type of drain hose installation, the odor could be coming from the standpipe.
This odor can come up the drain hose and into the unit.
Pour a cup or two of bleach or vinegar down the home drain
and let it sit for 24 hours before running another cycle.
This will help eliminate odor from the home drain.
If a cycle is started too soon after doing this, it will not help the issue.

7

Connect power plug.

Connect the power plug to the wall outlet. Avoid connecting several electric devices,

it may be the cause of a fire.

Max. 100cm

min. 60cm

9

8

Check the horizontality with a level (Gage).

1 Step

If washing machine legs are loose or not screwed, then screw up with the spanner wrench.
Using the level, level the washing machine from front to back and side to side.

A level

Higher

Tighten

Adjustable feet

2 Step

Using the spanner wrench to adjust leg for horizontality and try for Diagonal test.

Diagonal test

How to perform a diagonal test:

Place your right hand on the back, right corner and your left hand on the front,
left corner of the unit, then attempt to rock the unit from corner to corner.
Then, move your right hand to the front, right side and your left hand to the
back, left corner and attempt to rock the unit from corner to corner.

If the unit is level, it will not rock. However, if the unit is not level, it will rock.
If the unit rocks, it will be necessary to adjust the leveling feet of the unit.
Adjust the foot under the hand that is on the front of the machine.

Lock nut

Adjustable bolt

Tighten

Higher

Adjustable feet

Lower

Tighten

Adjustable feet

Lower the foot until there is no gap between floor and foot.
And only use adjustment rubber when difference at the leg adjustment is more than 10mm.

Rubber Cup

4620ER3001A
(Black)

for Tile floors

4620ER3001B
(Gray)

for Wooden floors

3 Step

Perform a Rinse and Spin with some clothing in the machine.
To do this, put 2~3kg of clothing in the unit, power on the unit, press the Rinse and Spin

button, and then start. When the unit reaches the spin cycle, watch for vibrations.
If the unit is vibrating, make small adjustments to the leg until they subside. (Try 2Step again)

10mm

4 Step

Tighten the lock nut against the base of the machine to lock the position leg.

Tighen the lock nut

10

9

Test operation

Preparation

1

for
washing.

· Connect the power plug to the
outlet.

· Connect the inlet hose.

Check the water heating.

6

Press the power button.

2

Check automatic reverse turn.

5

Press the START/PAUSE

3

button.

· In case of Coloreds program.

Check the water supply.

4

· Press the Option(Left) + Temp.
button simultaneously and the
present temperature will be
displayed.

Check drain and spin.

7

· Turn off Wash and Rinse after
pressing the Start/Pause button
and start the machine again.

· Check drain and spin.

Page 13

· Check if the drum rotates
clockwise and counterclockwise.

Power off and open the

8

door.

· Power off and then power on.

· Check if the door can be
opened after 3 minutes.

· Check if water is supplied through
the detergent dispenser.

Water removal.

9

· If SVC is needed during check,
remove the remaining water by
pulling out the hose cap.

11

5. OPERATION

Cycle Selector

• Rotate the Cycle selector
knob to select the cycle

designed for different
types of fabric and soil
levels.

Power

• Use this button to turn the
power On/Off.

Additional programs

•Time Delay : Allows the start of any cycle to be
delayed for 3~19 hours.

• Favorite :
customized operation for next use.

• Intensive : If the laundry is heavily soiled “Intensive”
option is effective.

•Medic Rinse : For high effectiveness or more purity in
rinse operation you can choose Medic Rinse option.
Medic Rinse is default in Baby Care program.

Favorite program allows you to store a

Start/Pause

• Use this button to Start/
Stop the washer.

Option Button

• Pre Wash : If the laundry is heavily soiled, “Pre Wash” Cotton is
recommended.

• Rinse+ : Used to additional rinse, which may assist in removing
traces of detergent residue.

• Normal+Hold : If you desire to leave fabrics in the machine without
spinning after rinse to prevent wrinkling, you may select Normal+Hold
by pressing the Option button.

• Rinse + Spin : Use this option to rinse and then spin.

12

Dry Selector knob

• Dry programs selected by rotating
dry knob.

• [Lower Temp. - Iron Dry - Cupboard
Dry - Eco Dry - Time(30,60,120)]
can be selected.

Tub Clean

•Tub Clean course can be set by
pressing and holding Intensive and
Pre Wash button simultaneously.

•Tub Clean is special cycle to clean
the inside of the washer.

Beep on/off

• The Beep on/off function can be set by pressing
and holding the Option and Spin button
simultaneouly.

Spin,Temp. Button

•To change the spin speed,
Press the Spin button to cycle
through available options.

• Select a water termperature
based on the type of load you
are washing.

Child Lock

• Use this option to prevent unwanted
use of the washer. Press and hold
2 Option buttons for 3 seconds to
lock/unlock control.

• When Child lock is set, CHILD LOCK
lights and all buttons are disabled
except the Power button. You can
lock the washer while it is operating.

13

6.

WIRING DIAGRAM / PCB LAYOUT / PROGRAM CHART

14

PCB Layout (Main)

Pressure Switch

&

Thermistor

Measure Hz impossible Here.
Just check cut-off.

Thermistor for Wash

Common

Pressure Switch

LCD DisplayLCD DisplayLCD Display

LCD DisplayLCD DisplayPCB Power

LCD DisplayLCD DisplayAG Sensor

Measure R impossible here.
Just check cut-off.

Long

Short

CommonCommon

LCD DisplayLCD DisplayMotor Stator Control

W

U

V

V ~ U / U ~ W / W ~ V

R : 8 ~11Ω

LCD DisplayLCD DisplayHall Sensor Control

LCD DisplayLCD DisplayHeater

(Next Page)

Door Switch

&

Drain Pump

Door Switch
Measure R impossible here

Common

Drain Pump (152~176Ω)

LCD DisplayLCD DisplayCirculation Pump

Circulation Pump (152~176Ω)

Ha

(5~15 kΩ)

Hb

(5~15 kΩ)

Common

Inlet Valve Control

Common

Pre. Valve

(3.5~4.5 kΩ)

Main Valve

(3.5~4.5 kΩ)

AG Valve

(3.5~4.5 kΩ)

15