LG WM3488HW User manual

WASHING MACHINE
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLES
CORRECTLY BEFORE OFFERING SERVICE.
MODEL : WM3488HW
website : http://biz.lgservice.com
e-m ail : http://LGEservice.com/techsup.html
BEFORE SERVICING THE WASHING MACHINE, UNPLUG THE POWER
CORD TO AVOID THE RISK OF AN ELECTRIC SHOCK.
WHEN SERVICING INTERNAL PARTS, USE ONLY SERVICE PARTS
SUPPLIED FROM LG.
AFTER SERVICING THE ELECTRIC WIRE, INSURE THAT INSULATION
APE IS APPLIED TO PREVENT AN ELECTRICAL SHORT.

51
P/No.: MFL62645378

2
CONTENTS
1. SPECIFICATIONS ............................................................................................................................. 3
2. FEATURES & TECHNICAL EXPLANATION ..................................................................................... 4
3. PARTS IDENTIFICATION ................................................................................................................. 6
4. INSTALLATION .................................................................................................................................. 7
5. OPERATION ................................................................................................................................... 12
6. WIRING DIAGRAM / PCB LAYOUT / Filter Assembly Filter Layout ................................................ 14
7. TROUBLESHOOTING......................................................................................................................17
7-1.BEFORE PREFORMING SERVICE ......................................................................................... 17
7-2.LOAD TEST MODE .................................................................................................................. 17
7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY ............................................................. 18
7-4.
HOW TO KNOW TO TEMPERATURE OF EACH THERMISTOR AT OPERATING CONDITION .. 18
7-5.ERROR DISPLAY ..................................................................................................................... 19
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) .......................................................................................................... 30
• Dry Heater Trouble ................................................................................................................. 31
• Dry Fan Motor Trouble ............................................................................................................ 32
8. TROUBLESHOOTING WITHOUT ERROR CODES ....................................................................... 33
• PF(Power Failure or No Power)................................................................................................33
• Vibation & Noise in spin ......................................................................................................... 34
• Detergent & Softener does not flow in .................................................................................... 35
• Water Leak ............................................................................................................................. 36
9. DISASSEMBLY INSTRUCTIONS ................................................................................................... 38
10. EXPLODED VIEW ......................................................................................................................... 46

3
1. SPECIFI CATION
ITEM
POWER SUP PLY
PRODUCT WEIGHT
OPERATION WATER PRESSURE
CONTROL TYPE
WASH & DRY CAPACITY
DIMENSION
WASH PROGRAM
RINSE
DOOR SWITCH TYPE
WATER LEVEL
RES ERVATION
SENSING OF THE LAUN DRY AMOUNT
FUZZY LOGIC
DISPLAY OF THE REMAINING TIME
ERROR DIAGNOSIS
POWER A UTO OFF
CHILD LOCK
AUTO RESTART
TIME SAVE
ELECTRICITY
CONSUMPTION
WASHING
SPIN
DRAIN MOTOR
WASH HEATER
DRY HEATER
REVOLUTION
SPEED
WASH
SPIN No Spin/400/800/1000/1400
46 rpm
1.38 - 8.27 kgf/cm2 (138 ~ 827 kPa)
Electronic
Refer to the Rating Label
600 mm(W)x640 mm(D)x850 mm(H)
Tub Clean, Sanitary, Baby Wear, Bulky Large, Heavy Duty,
Perm.Press, Cotton/Normal, Sports Wear, Hand Wash/Wool,
Delicate, Speed Wash, Wash+Dry, Drain+Spin, Downloaded
Rinse+Spin, Extra Rinse
PTC+Solenoid
WATER LEVEL: 0~ 255 (by Sensor)
From 1 hours to19 hours
Adapted
Adapted
Adapted
13 items
Adapted
Adapted
Adapted
Adapted
SMART NFC(Tag on function) Smart Diagnosis function (3.0)
113 W
304 W
80 W
1000 W
1200 W
120 V ~, 60 Hz
71 kg
WM3488HW

4
2. FEATURES & TECHNICAL EXPLANATION
2-1. FEATURES
Inverter Direct Drive system
The advance Brushless DC motor directly drives the drum without belt
and pulley.
6 motion
Washer is able to perform various drum actions or a combination of different actions
depending on the wash program selected.
Combined with a controlled spin speed and the ability of the drum to rotate both
left and right, the wash performance of the machine is greatly improved, givong
you perfect results every time.
Tag on
This is a function that may use Diagnosis, Download Course, Washing Coach, One
Touch Washing, etc. when you touch the Tag On logo of the washing machine by using
your smartphone with NFC.
Direct Drive System
The advanced Brushless DC motor directly drives the drum without belt and pulley.
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.
Child Lock
The Child lock prevents children from pressing any Buttons to change the settings during
operation.
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
Auto Restart allows the program to restart all by itself in case of power
Failure. It does from the stage where it stopped.
SmartDiagnosis™
Should you experience any technical difficulty with your washing machine, it has the
capability of transmitting data by phone to the Customer Information Center. The call
center agent records the data transmitted from your machine and uses it to analyze the
issue, providing a fast and effective diagnosis.

5
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.
water
temperature
washing time
rinse time
the best
washing
performance
spin rhythm, time
laundry
amount
FUZZY
LOGIC
selected
washing
temperature
SENSING EFFECT PROCESSING DETERMINATION
2-4. THE DOOR CAN NOT BE OPENED
While program is operating.
While Door Lock light turns on.
2-5. NFC (Tag On Function)
The Tag On function can only be used with smart phones equipped with the NFC function and
based on the Android operating system (OS).
Position your smart phone so that the NFC antenna on the back of your smart phone matches the
position of the Tag On icon on the appliance.
NFC reading performance of your smart phone must be higher than a certain level for using this
function.

8INTRODUCING YOUR WASHING MACHINE
INTRODUCING YOUR wASHING MACHINE
Parts and Accessories
Parts
Accessories
NOTE
Contact LG Customer Service at 1-800-243-0000 (1-888-542-2623 in Canada) if any accessories are
y
missing.
For your safety and for extended product life, use only authorized components. The manufacturer
y
is not responsible for product malfunction or accidents caused by the use of separately purchased
unauthorized components or parts.
The images in this guide may be different from the actual components and accessories, and are subject
y
to change by the manufacturer without prior notice for product improvement purposes.
or
Hot/cold water hoses Non-skid pads Caps for covering
shipping bolt holes
Wrench Tie strap Elbow bracket
(for securing drain hose)
Included Accessories
Detergent
dispenser
drawer
(See page 20)
Door
Control panel
(See page 9)
Leveling feet
Drain pump filter cover
Drain pump filter
Drain hose
Water inlets
Shipping
bolts
Power
cord
Drain
hose
Large-capacity
stainless steel drum
Inverter direct-
drive motor

7
4.INSTALLATION
INSTALLATION
The appliance should be installed as follows.
Check the conditions of installation area.
1. Check level ground.
On raised foundations or upper level homes, thevibrations can be caused by the type of flooring.
It may benecessary 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 causevibrations and slipping .
Remove any foreign objects , if any from underneath the machine and level unit properly.
See below for examples of foreign objects.
1
Open the box and check appliance condition.
2
horizontal
Capet Paper Laminated
paper
Washer
Wrench
This leveling (or spanner) wrench must
be used to remove the shipping bolts
and level the unit. This should be kept
for future use.
Base Packing
Purchased
stopper

8
Use spanner to remove transit bolts.
3
Confirm the distance between the appliance and the wall.
4
The tap connection and hose connection must be parallel.
5
Without removal of transit bolts
Spin noise and shaking.
X 4 EA
Transit bolts
More than 2cm If the distance is less than 2cm,
the water supply hose will
kink or fold.
1. Normal Tap without thread & screw type inlet hose.
1. Unscrew the fixing screw to
attach the tap. 2. Push the connector up till the rubber packing is in tight contact
with the tap. Then tighten the 4
screws.
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.
1. Untighten the upper connector
screw. 2. Push the upper connector up till the rubber packing is in
tight contact with the tap. Then
tighten the 4 screws.
3. Connect the water supply hose
to the middle connector, pushing
the plate down.
• In case the diameter of the tap
is large remove the guide plate. • Turn the middle connector not to
have water leaked.
•Make sure that the rubber seal is
inside the hose connector.
• To separate the water supply
hose from the middle connector
shut off the tap.
Then pull the inlet hose down,
pushing the plate down.
• Make sure that there are no
kinks in the hose and that it is
not crushed.
2. Normal Tap without thread & one touch type inlet hose (Single inlet models)
Upper
Connector
Fixing screw
Guide plate
Connector
Rubber packing
Upper
Connector
Rubber packing Upper
Connector Plate
Water supply
hose
Rubber seal
Hose connector
Upper
Connector
Middle
connector
Rubber
packing
Upper
Connector
Fixing screw
Middle
connector
Rubber
packing
Upper
Connector
Plate
Water supply
hose

9
Connect Drain Hose.
6
Connect power plug.
7
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.
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.
Connect the power plug to the wall outlet. Avoid connecting several electric devices,
it may be the cause of a fire.
about 100 cm
about 145 cm
about 105 cm
Laundry tub
Max. 100cm
min. 60cm
Max. 100cm
min. 60cm
Retainer
Tie
strap
Hose
min. 60 cm
max. 100 cm

10
Check the horizontality with a level (Gage).
8
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.
2 Step
Using the spanner wrench to adjust leg for horizontality and try for Diagonal test.
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)
4 Step
Tighten the lock nut against the base of the machine to lock the position leg.
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.
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.
How to perform a diagonal test:
A level
Higher
Tighten
Adjustable feet
Diagonal test
Tighten
Adjustable feet
Higher
Tighten
Adjustable feet
Lower Lock nut
10mm
Adjustable bolt
Tighen the lock nut
4620ER3001B
(Gray)
for Wooden floors
Rubber Cup
4620ER3001A
(Black)
for Tile floors

Test operation
9
11
1Preparation
for
washing.
· Connect the power plug to the
outlet.
· Connect the inlet hose.
2Press the power button. 3Press the START/PAUSE
button.
6Check the water heating.
· Press the Option(Left) + Temp.
button simultaneously and the
present temperature will be
displayed. Page 13
· Check if the drum rotates
clockwise and counterclockwise.
5
Check automatic reverse turn.
4Check the water supply.
· Check if water is supplied through
the detergent dispenser.
7Check drain and spin. 8Power off and open the
door.
9Water removal.
· If SVC is needed during check,
remove the remaining water by
pulling out the hose cap.
· In case of Coloreds program.
· Turn power off and then power on.
· Select the spin rpm
· Press the START PAUSE button.
· Check the spin and drain
functions. · Turn power off and then power on.
· To turn off, press the power button
for 1sec
· Listen for a click to determine if the
door is unlocking.

12
5.OPER ATION
Cycle Selector
• Rotate theCycle selector
knob to select the cycle
designed for different
types of fabric and soil
levels.
Start/ Pause
• Use this button to Start/
Stop the washer.
•
Power
Use this button to turn the
power On/ Off.
•
Additional Programs
Time Delay : Allows the start of any cycle to be delayed for 1~19 hours.
Favorite : Favorite program allows you to store a customized operation
for next use.
Select this option to add extra water
To the wash and rinse cycles for superior results, especially with large
or bulky items.
Beep on/off
•
•
•
•

13
•
•
•
LED Display
Display the estimated remaining time
(Hour : minute) to finish.
In case of abnormal operation.
error indications are displayed
(IE, OE, UE, dE, tE, FE, PE, LE, PF, DHE)
See troubleshooting guide.
Option Buttons
• The option buttons allow you to
select additional cycle options and
will light when selected. Certain
buttons also allows you to activate
special function by processing and
holding the button for 3 seconds.
•
Cycle setting Buttons
Use these buttons to select the desired
cycle options for the selected cycle.
Press the button for that setting until
the indicator light for the desired
value is it.
•

14
6. WIRING DIAGRAM / PCB LAYOUT
PRESSURE SWITCH
WASH
DRY C/DUCT
TV
TV
TW
TW LB
L
B
L
B
RD
BL
GN/YL
NOISE FILTER
KB
BK
TW
A
RD
N
LB
LY
LB
KB
RD BL BLNA
BK
BK BK
BK
WH
SB
BR BK BK BL
GN / YL
RD
YL
LY
LB
BN
BN
BL
DR
KB
NB
HW
KB
LY
HW
KB
LY
LB
BKWH
NA4
BL3NA2
YL1
YL
BL
LB
LY
L
Y
DR DR
WH
V U W
WHWH
NA3 BL1 GR
MOTOR
POWER CORD
DOOR LOCK SWITCH
INLET VALVE
WH
WH
DRY V/V
MAIN
V/V
PRE
V/V
HOT
V/V
CIRCULATION
PUMP
DRAIN
PUMP
HW
RETAEHGNIHSAW
RD
BL
MAIN PCB
YL
RD
BL
WH/RD
BL
PK
FUSE
GN/YL
RETAEHYRD
FUSEFUSE
THERMOSTAT
Base/Line
NA
BL
KB
NB
DR
RO
AN
SB
YL
NA
CN1
NA
NA
CON4_1
DISPLAY PCB
VT
BK
BN
RD
OR
YL
BL
VT

15
PCB Layout (Main)
LED Display
Heater
Display Power
Thermistor
PCB POWER
Dry Heater
Dry Fanmotor
Door S/W
&
Drain Pump
Door
Door S/W
S/W
Drain
Pump
(152~170Ω)
Common
Pressure
S/W
PressureSwitch
&
MeasureHzimpossible
Here. JustCheckcut-off
Circulation Pump
Circulation
Pump
(152~170Ω)
Inlet Valve Control
Main Valve
3.5~4.5kΩ
Pre Valve
3.5~4.5kΩ
Motor Stator Control
V~U
/U~W
/W~V
⇒R:8~11Ω
W
U
V

16
Filter Assembly Filter Layout
PCB Power
Earth
Power Cord

17
Before servicing ask the customer what the trouble is.
Check the adjustments. (Power supply : 113-127V, Removal of transit bolts etc..)
Check the troubles referring to the troubleshooting.
Decide service steps referring to disassembly instructions.
Then, service and repair.
After servicing, operate the appliance to see whether it works OK or NOT.
7.TROUBLESHOOTING
7-1. BEFORE SVC CHECKING
7-2. LOAD TEST MODE
1Turn on, and touch ‘Soil Level’ and ‘Spin Speed’
at the same time in 1 second.
2The washer must be empty and the controls must be in the off state.
3Press Power with above two buttons pressed and then buzzer will sound.
4Press the Start/Pause button repeatedly to cycle through the test modes
1
2
3
4
5
6
None
1 time
2 times
3 times
4 times
5 times
6 times
7 times
8 times
9 times
10 times
11 times
12 times
13 times
Turns on all lamps and locks the door.
Tumble clockwise.
Low speed Spin.
High speed Spin.
Inlet valve for prewash turns on.
Inlet valve for main wash turns on.
Inlet valve for hot water turns on.
Inlet valve for dry valve turns on.
Tumble counterclockwise.
Heater turns on for 3 sec.
Circulation pump turns on.
Drain pump turns on.
Dry Fan / Dry Heater turn on.
Off
rpm (42~50)
Display version(ex. 1U:xx, 1q:xx)
rpm (55~65)
rpm (137)
Water level frequency (229~255)
Water level frequency (229~255)
Water level frequency (229~255)
Water level frequency (229~255)
rpm (42~50)
Water temperature
Water level frequency (0 ~ 255)
Water level frequency (0 ~ 255)
Dry Fan 6min. / Dry Heater 5min.
-
Number of times the
Start/Pause button is pressed Check Point Display Status

18
7-3. HOW TO CHECK THE WATER LEVEL FREQUENCY
7-4. HOW TO KNOW TO TEMPER ATURE OF EACH THERMISTOR
AT OPER ATING CONDITION.
The digits means water level frequency. (10-1 kHz)
ex) 241 :Water level frequency = 241 x 10-1 kHz
24.1 kHz
Press the Custom PGM and Temp. button simultaneously.
Press the Temp. and Pre Wash button simultaneously.
Thermistor in tub temperature.

If you press the Start/Pause button in error condition, any error except will disappear and the
machine will change into the 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 the case of , power will not be turned off.
19
7-5. ERROR DISPLAY
ERRO R SYMP TOM CAUSE
WATER INLET
ERROR
•Not reached to the water level 0.2khz within
4 minutes, not reached to water level 24.8 khz within
10 minutes, or not reachd to the preset water level
within 25 minutes Page 21
1
UNBALANCE
ERROR
• The appliance is tilted.
• Laundry is gatherd to one side. Page 22
2
WATER OUTLET
ERROR • Not fully drained within 10 minutes. Page 23
3
OVER FLOW
ERROR
• Water is over flowing (less 213).
If " " is displayed, the drain pump operates
to drain the water automatically. Page 25
4
PRESSURE SENSOR
S/W ERROR
• The sensor pressure switch is out of order.
Page 26
5
DOOR OPEN
ERROR
• 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. Page 27
6
THERMISTOR(HEATING)
ERROR
• The THERMISTOR is out of order. Page 28
7
MOTOR LOCKED
ERROR
• The connector in the LEAD WIRE ASSEMBLY is
not connected to the connector of STATOR
ASSEMBLY.
Reconnect or repair the connector.
• The hall sensor is out of order/defective.
Replace the STATOR ASSEMBLY Page 29
8
POWER
FAILURE • The washer ecperienced a power failure Page 33
9DRY HEATER
ERROR
• The Dry Heater is out of order
• The Connector of the Dry Heater is not connected
properly to the connector in the Main PWB ASSEMBLY
• The Dry fan motor is out of order Page 30
10