LG WM2901HA, WM3001HA Service Manual
Website:http://biz.lgservice.com
WASHING MACHINE
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
MODEL: WM2901H*A
APRIL. 2009 PRINTED IN KOREA P/No.:MFL30599137
68
CONTENTS
1. Specifications .................................................................................................................................. 5
2. Features & Technical Explanation ................................................................................................ 6-8
3. Parts Identification ........................................................................................................................... 9
4. Installation & Test ..................................................................................................................... 10-12
5. Operation ................................................................................................................................. 13-19
5-1. Control Panel Features ..................................................................................................... 13-15
5-2. Cycle Guide ........................................................................................................................... 16
5-3. Special Functions ................................................................................................................... 17
5-4. Explanation of Each Process ............................................................................................ 18-19
6. Wiring Diagram / Program Chart .............................................................................................. 20-21
7. Test Mode ...................................................................................................................................... 22
7-1. Safety Caution ....................................................................................................................... 22
7-2. Load Test Mode ..................................................................................................................... 22
7-3. How To Read the Display in Load Test Mode ........................................................................ 23
7-4. How To Check the Water Level Frequency and vibration sensor error .................................. 23
8. Troubleshooting ....................................................................................................................... 24-39
8-1. Safety Caution ....................................................................................................................... 24
8-2. Error Mode Summary ....................................................................................................... 24-25
8-3. Troubleshooting Summary ..................................................................................................... 26
8-4. Troubleshooting With Error ............................................................................................... 27-33
8-5. Troubleshooting Else ........................................................................................................ 34-39
9. Component Testing Information ............................................................................................... 40-54
9-1. Filter Assembly (Line Filter) ................................................................................................... 40
9-2. Door Look Switch Assembly ............................................................................................. 41-42
9-3. Stator Assembly ................................................................................................................ 43-45
9-4. Pump Motor Assembly ........................................................................................................... 46
9-5. Inlet Valve Assembly .............................................................................................................. 47
9-6. Heater Assembly .................................................................................................................... 48
9-7. Thermistor Assembly ........................................................................................................ 49-50
9-8. Steam Generator Assembly .............................................................................................. 51-52
9-9. Lamp ...................................................................................................................................... 53
9-10 Vibration sensor assembly .................................................................................................... 54
10. Disassembly Instructions ......................................................................................................... 55-65
11. Exploded View ......................................................................................................................... 66-68
11-1. Cabinet & Control Panel Assembly ...................................................................................... 66
11-2. Drum & Tub Assembly ......................................................................................................... 67
11-3. Dispenser Assembly ............................................................................................................. 68
4
1. SPECIFICATIONS
ITEM WM2901H*A
COLOR
POWER SUPPLY
PRODUCT WEIGHT
ELECTRIC POWER
CONSUMPTION
REVOLUTION
SPEED
CYCLES
WASH/RINSE TEMPERATURES
SPIN SPEEDS
OPTIONS
WATER CIRCULATION
OPERATIONAL WATER PRESSURE
CONTROL TYPE
WASH CAPACITY [cu.ft ]
DIMENSIONS
DELAY WASH
DOOR SWITCH TYPE
WATER LEVEL
LAUNDRY LOAD SENSING
ERROR DIAGNOSIS
AUTO POWER OFF
CHILD LOCK
RLM ENABLE
STEAM
WASHING
DRAIN MOTOR
WASH HEATER
WASH
SPIN
W:BLUE WHITE, R:WILD CHERRY, L:PACIFIC BULE
AC 120 V, 60 Hz
220.5 lbs (100kg)
280 W
80 W
1000 W
46 rpm
0-1320 rpm
9
5
5
Prewash, Rinse+Spin, Extra Rinse, Water Plus, Stain Cycle
Incorporated
14.5-116 psi (100-800 kPa)
Electronic
3.47 (4.0 IEC)
27”(W) X 293/4”(D) X 3811/16”(H), 5013/16” (D, door open)
up to 19 hours
PTC + Solenoid
10 steps (by sensor)
Incorporated
Incorporated
Incorporated
Incorporated
Incorporated
Incorporated
5
2. FEATURES & TECHNICAL EXPLANATION
2-1. FEATURES
Ultra Capacity
The Larger drum enables not just higher head drop and stronger centrifugal force,
but also less tangling and wrinkling of the laundry. Heavier loads, such as king size
comforters, blankets, and curtains, can be washed.
Direct Drive System
The advanced Brushless DC motor directly drives the drum without belt and pulley.
Tilted Drum and Extra Large Door Opening
Tilted drum and extra large opening make it possible to load and unload clothing
more easily.
Steam Washing and SteamFresh
Steam Washing features upgraded washing performance with low energy and water
consumption. SteamFresh
TM
TM
cycle removes wrinkles from dry clothes.
RollerJets
Washing ball enhances the wash performance and reduces damage to the clothing.
The jets spray and help tumble clothes to enhance washing performance while
maintaining fabric care.
Automatic Wash Load Detection
Automatically detects the load and optimizes the washing time.
Built-in Heater
Internal heater helps to maintain water temperature at its optimum level for selected
cycles.
Child Lock
The Child lock prevents children from pressing any button to change the settings
during operation.
6
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.
water
temperature
washing time
selected
washing
temperature
SENSING
load
size
PROCESSING
NEURO-
FUZZY
rinsing time
spin rhythm, time
DETERMINATION
2-3. 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.
2-4. DOOR CONTROL
the best
washing
performance
EFFECT
The door can be opened by pulling the door handle whenever washer is not in operation.
When the cycle is completed, the DOOR LOCKED light will turn off.
If a power failure has occurred while in operation, the door will unlock after 5 minutes.
Clicking sounds can be heard when the door is locked/unlocked.
7
2-5. THE DOOR CAN NOT BE OPENED
While program is operating.
When a power failed and power plug is taken out in operation.
While Door Lock lights turn on.
White the motor is in the process of intertial rotating, through the operation is paused.
2-6. DOOR LOCKED LAMP LIGHTS
When the frequency of water level is lower than 22.9 kHz.
(It can be canceled when the frequency is more than 23.8 kHz.)
When the temperature inside the tub is higher than 45°C and water level is not 25.5 kHz.
(It can be canceled when the water level is 25.5 kHz or the temperature inside the tub is lower than 40°C.)
2-7. CHILD LOCK
Use this option to prevent unwanted use of the washer. Press and hold PRE WASH button 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 controls of the washer while washing.
2-8. WATER CIRCULATION
When washing and rinsing function of shower at the upper part of Gasket.
When washing, it continuously operates for 3 minutes and intermittently.
When rinsing, it continuously operates after completion of water supply.
2-9. STEAM
For tough stained clothes, sick room linens, or baby clothes.
Steam Wash is available with Sanitary, Bulk/Large, Perm. Press, Cotton/Normal, and Baby Wear cycles.
This option features upgraded washing performance with low energy and water consumption.
Do not load delicates such as wool, silk, and easily discolored clothes.
2-10. DRUM LIGHT
The Drum Light comes on when the Power button is pressed. It goes off when the door is closed
and the washer starts operation.
The Drum Light remains off when the door is locked.
The Drum Light can be turned on while the washer is in operation by pressing the Rinse+Spin
button for 3 seconds. The light will turn off automatically 4 minutes later.
The Drum Light comes on when the washing cycle is finished and goes off 4 minutes later.
8
3. PARTS IDENTIFICATION
Drain Hose
Dispenser
Door
Shipping Blots
Power Plug
• 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
Water Circulation &
Steam Nozzle
Drum Light
Drum
Door Seal
Lower Cover Cap
ACCESSORIES
Back of Washer
Adjustable Feet
Cold Water Inlet
Hot Water Inlet
Drain Pump FilterDrain Plug
Air Vent for Safety
Hot/Cold (1 each)
Hose
Wrench
9
Tie strap (Option)
to secure drain hose to standpipe,
inlet hose, or laundry tub
4. INSTALLATION & TEST
1
Before servicing, ask the customer what the trouble is.
2
Check the setup (power supply is 120 V AC, remove the transit bolts level the washer...,).
3
Check with the troubleshooting guide.
Plan your service method by referring to the disassembly instructions.
4
Service the unit.
5
After servicing, operate the appliance to see whether it functions correctly.
6
STANDARD INSTALLATION
The appliance should be installed as follows:
REMOVE THE SHIPPING
BOLTS
Remove the 4 shipping bolts
with the supplied wrench.
Do first lower side to remove
easily.
Keep the shipping bolts and
spanner for future use.
Insert the 4 caps (provided)
into the hole.
INSTALL THE APPLIANCE
ON A FLAT AND FIRM SURFACE
ADJUST THE
LEVELING
Turn the leveling feet to
adjust the appliance.
Lower
Higher
Keeping
Turn clockwise to raise;
counterclockwise to lower.
10
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.
Install the inlet hose to correct temperature
water tap.
Otherwise, it cause drips on the drawer panel
handle and drawer panel.
CONNECT THE DRAIN HOSE
Hot
Cold
• Make sure that the hose is not twisted.
• Avoid submerging the end of the hose.
The end of the drain hose should be placed less than 96” from the floor.
CONNECT POWER PLUG
• Connect the power plug to the wall outlet.
• Avoid connecting several electric devices,
as doing so may cause a fire.
11
7
TEST OPERATION
Preparation for
1
washing.
• Connect the power plug to the
outlet.
• Connect the inlet hoses.
Check the water heating
6
function.
Press the POWER button.
2
Check the automatic reverse
5
rotation.
Press the Start/Pause button.
3
• Listen for a click to determine if the
door has locked.
Check the water supply.
4
• Press the WASH/RINSE button
and the present temperature will
be displayed.
Check the drain and spin
7
functions.
•Power off and the power on.
• Press the SPIN SPEED button.
• Press the START/PAUSE button.
• Check the spin and drain functions.
• Check if the drum rotates
clockwise and counterclockwise.
Press the START/PAUSE
8
button.
• Listen for a click to determine if the
door is unlocking.
12
• Check if water is supplied through
the detergent dispenser.
Water removal
9
• If SERVICE is needed during
check, remove the remaining
water by pulling out the hose cap.
5. OPERATION
5-1. CONTROL PANEL FEATURES
WM2801H*A
13
Power Button
Status Indicator
• Use this button to turn the power
On/Off.
• It shows elapsed time of the cycle the washer is
operating.
Cycle Selector Knob
• Rotate the Cycle 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.
14
Option Button
• STEAM: Use the STEAM button to add steam to the cycle for the extra cleaning.
• WASH/RINSE OPTIMIZER: Use the WASH/RINSE OPTIMIZER button to select the water level, and
detergent mount automatically by the smart sensor & program.
• PRE WASH:
• CUSTOM PGM:
• DELAY WASH:
• TUB CLEAN:
• RINSE+SPIN:
Use the PREWASH button to select to wash temporary before to start the course which you chosen.
Use the CUSTOM PGM button to select the course that you has been saved by “PGM SAVE”.
Once you have selected the cycle and other settings, press this button to delay the start of the wash cycle.
A buildup of detergent residue can occur in the wash tub over time and can lead to mideway or musty smell.
Select this option to rinse and spin a load separately from a regular cycle.
Wash/Rinse, Spin speed, Soil Level, Beeper Button
• Select a water temperature based on the type of load you are washing.
• To change the spin speed, press the Spin Speed button repeatedly to cycle through available options.
• To change the soil level, press the Soil Level button repeatedly until the desired setting is on.
• Press repeatedly to adjust the volume of the Beeper.
15
5-2. Cycle Guide
The cycle guide below shows the options and recommended fabric types for each cycle.
Cycle Fabric Type
Steam
Fresh
Dress shirts, blouses
TM
Heavily soiled
Sanitary
underwear, work
clothes, diapers, etc.
Bulky/
Large
Large items such as
blankets and comforters
Dress shirts/pants,
Perm Press
wrinkle-free clothing,
poly/cotton blend
clothing, tablecloths
Cotton/
Normal
Cotton, linen, towels,
shirts, sheets, jeans,
mixed loads
Wash/Rinse
Temp.
Extra Hot/Cold
Warm/Cold
Warm/Warm
Hot/Cold
Cold/Cold
Warm/Cold
Warm/Warm
Hot/Cold
Cold/Cold
Warm/Cold
Warm/Warm
Hot/Cold
Cold/Cold
Pre-
Spin Speed Soil Level Steam
High
Normal
Rinse +
Wash
Spin
Extra
Rinse
Stain
Cycle
Water
Plus
Extra High
No Spin
Low
Heavy
Light
Medium
Low
Medium
No Spin
Medium
High
No Spin
Normal
Heavy
Light
Normal
Heavy
Light
Low
High
Extra High
No Spin
Normal
Heavy
Light
Low
Medium
Quick
Cycle
Wash/ Rinse
TM
Optimizer
High
Allergiene
TM
Cotton,unterwear,
pillow covers, bed
sheets, baby wear
Extra High
No Spin
Low
Medium
Dress shirts/blouses,
Delicates
nylons, sheer or lacy
garments
Hand Wash/
Wool
Items labeled
“hand-washable”
Cold/Cold
Warm/Cold
Warm/Warm
Warm/Cold
Medium
No Spin
Low
Low
No SpinCold/Cold
Normal
Heavy
Light
Normal
Light
Warm/Warm
Speed
Wash
Lightly soiled clothing
and small loads
Hot/Cold
Cold/Cold
Warm/Cold
Warm/Warm
Extra High
No Spin
Low
Medium
Light
Normal
Heavy
High
NOTE: To protect your garments, not every wash/rinse temperature, spin speed, soil level, or option is available
with every cycle.
16
5-3. SPECIAL FUNCTIONS
The option buttons also activate special functions, including CHILD LOCK, DRUM LIGHT, TUB CLEAN, and
LANGUAGE. Press and hold the option button marked with the special function for 3 seconds to activate.
CHILD LOCK
Use this option to prevent unwanted use of the washer or to keep cycle settings from being
changed while the washer is operating. Press and hold the PREWASH button for 3 seconds
to activate or deactivate CHILD LOCK. CHILD LOCK will be shown in the display, and all
controls are disabled except the ON/OFF button. The washer can be locked during a cycle.
DRUM LIGHT
The drum is equipped with a blue LED light that illuminates when the washer is turned on.
This light automatically turns off when the door is closed and the cycle starts. To turn on the
light during a cycle, press and hold the RINSE+SPIN button for 3 seconds. The drum light
will illuminate and then turn off automatically after 4 minutes.
TUB CLEAN
A buildup of detergent residue can occur in the wash tub over time and can lead to a mildew
or musty smell. The TUB CLEAN cycle is specially designed to remove this buildup. Press
and hold the EXTRA RINSE button for 3 seconds to activate this cycle. The display will show
a message to add liquid bleach to the dispenser. After the cycle has ended, open the door
and allow the drum interior to dry completely. NOTE: Do NOT use this cycle with clothes, and
do NOT add detergent or fabric softener.
17
5-4. Explanation of each process
No. Process Explanation
Stay • Electrical power is supplied.
1.
•Washer is ready to work and the micom is in the active mode.
Water
2.
supply
Soaking
3.
& washing
laundry
4. Heating &
washing
5.
Washing
~
& heating
6.
/ washing
7. Washing • Fuzzy Logic decides washing time according to the laundry load, water
Drainage • A pump motor drains the water from the drum.
8.
• After loading laundry and selecting a course and a cycle, water is
supplied and drum rotates.
• When a user selects Pre-wash course, water is supplied through pre
wash valve.
•To get laundry wet, drum rotates clockwise and counterclockwise.
• If water amount is insufficient at this time, the Inlet valve will supply
water again.
• The heater heats the water in drum to the selected water temperature
and drum rotates for washing.
• When the water temperature reaches to the selected temperature,
the heating stops and only the drum rotates.
• If water temperature becomes lower than selected because of
re-supplied water, the heating starts again.
temperature, and other factors.
•After sensing drained water amount by water level frequency, spin starts.
• When a heating course is selected, stay cooling process is performed to
decrease the water temperature gradually to prevent laundry from being
damaged and for safety reasons.
9. Untangling
(Sensing
eccentricity)
• It balances laundry load and senses the eccentricity of the load, to only
allow spinning without vibration.
• If the eccentricity is worse than the allowed level, it repeats the
disentangling process. When the repeated time is more than allowed
level, it displays UE.
• If the eccentricity is good, the intermittent spin starts.
• During this process, the drain pump works for drainage intermittently.
18
No. Process Explanation
A.
Intermittent
spin
•To reach the correct set speed, the motor rotates clockwise and
counterclockwise directions after spin process starts.
• If the water level frequency is lower than 23.0 kHz,
a washer senses suds and starts suds removal process.
B. Rinse
spin
• In this process, the remaining water during washing process is
extracted and the selected speed is kept.
• Removing suds process is in active mode at this cycle.
C. Remaining
spin
• After spin finishes, the drum rotates by remaining spin power until it
stops. Motor power is off.
• This process is overlapped with next process.
D. Rinse water
•Water supply for rinse process.
supply
E.
Rinse • Rinsing process.
F. Last
drainage
• After spin finishes and power is not supplied to motor, the drum
rotates by remaining spin power.
• If rinse hold is selected, the drainage is not proceeded after rinse
finishes.
Disentangling • The same as item 9.
G.
Intermittent spin
H.
Main spin1 • The same as item B.
I.
• The same as item A.
J. Main spin2 • At the end of a main spin, the spin speed will reach the selected rpm.
K. Remaining spin • The same with item C.
L. Disentangling • After spin finishes, disentangling starts to remove unbalanced
laundry.
M. End • After ‘end’ signal is displayed, it stays for 8 seconds and power is
automatically turned off. (Auto type door switch)
• After door switch is off, end signal is displayed in the case of
manual type and it takes around 2 minute to turn off door switch.
19
6. WIRING DIAGRAM / PROGRAM CHART
20
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