Website: http: //www.LGEservice.com
E-mail: http: //www.LGEservice.com/techsup.html
WASHING MACHINE
SERVICE MANUAL
!
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
MODEL: WM1812CW/WM1814CW/WM1815CS
100
JUN. 2004 PRINTED IN KOREA P/No.:3828ER3027F
101
CONTENTS
2
1. SPECIFICATIONS
ITEM WM1812CW/WM1814CW WM1815CS
COLOR BLUE WHITE TITANIUM
POWER SUPPLY
PRODUCT WEIGHT
AC 120 V, 60 Hz
173 lbs. (78.5 kg)
ELECTRIC POWER
CONSUMTION
REVOLUTION SPEED
CYCLES
WASHING
DRAIN MOTOR
WASH HEATER
WASH
SPIN
280 W
80 W
–
46 rpm
0-900 rpm
5
WASH/RINSE TEMPERATURES
SPIN SPEEDS
OPTIONS
CUSTOM PROGRAM
WATER CIRCULATION
OPERATIONAL WATER PRESSURE
CONTROL TYPE
WASH CAPACITY
DIMENSIONS
DELAY WASH
DOOR SWITCH TYPE
WATER LEVEL
LAUNDRY LOAD SENSING
ERROR DIAGNOSIS
AUTO POWER OFF
5
5
Prewash, Quick Cycle, Extra Rinse, Rinse+Spin, Delay Wash
–
–
Electronic
2.96 cu. ft (3.42 cu. ft. IEC)
27” (W) X 301/32” (D) X 3811/16” (H), 5013/16” (D, door open) up to 9 hours
PTC + Solenoid
9 steps (by sensor)
Incorporated
Incorporated
Incorporated
CHILD LOCK Incorporated
3
2. FEATURES & TECHNICAL EXPLANATION
2-1. FEATURES
5
추가선택, 예약,
■ Direct Drive System
The advanced Brushless DC motor directly drives the drum without belt and pulley.
■ Tilted Drum and Large Door Opening
Tilted drum and large opening make it possible to load and unload clothing more easily.
■ Time-Released Dispenser
Detergent, fabric softener and bleach are dispensed separately at the right time during wash cycle.
■ Automatic Wash Load Detection
Automatically detects the load and optimizes the washing time.
■ Child Lock
The Child lock prevents children from pressing any button to change the settings during operation.
4
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 selected washing temperature load size
SENSING PROCESSING
NEURO-
FUZZY
DETERMINATION washing time rinsing time spin rhythm, time the best washing performance
EFFECT
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 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.
5
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 OPTION button for 3 seconds to lock/unlock control.
When Child lock is set, “ ” blinks and all buttons are disabled except the Power button. You can lock the washer while it is operating.
6
3. PARTS IDENTIFICATION
울
ACCESSORIES
7
4. INSTALLATION & TEST
Before servicing, ask the customer what the trouble is.
Check the setup (power supply is 120 V AC, remove the transit bolts....).
Check with the troubleshooting guide.
Plan your service method by referring to the disassembly instructions.
Service the unit.
After servicing, operate the appliance to see whether it functions correctly.
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.
INSTALL THE APPLIANCE
ON A FLAT AND FIRM SURFACE
ADJUST THE
LEVELING
Turn the leveling feet to adjust the appliance.
Keep the shipping bolts and spanner for future use.
Insert the 4 caps
(provided) into the hole.
Turn clockwise to raise; counterclockwise to lower.
8
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.
CONNECT THE DRAIN HOSE
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.
9
TEST OPERATION
Preparation for washing.
Press the POWER button.
Press the Start/Pause button.
Connect the power plug to the outlet.
Connect the inlet hoses.
Check the water temperature.
Check the automatic reverse rotation.
Listen for a click to determine if the door has locked.
Check the water supply.
MAX
SOFTENER
Press the WASH/RINSE button and the present temperature will be displayed.
Check if the drum rotates clockwise and counterclockwise.
Check the drain and spin functions.
Press the
START/PAUSE button.
Check if water is supplied through the detergent dispenser.
Water removal
Power off and the power on.
Press the SPIN SPEED button.
Press the START/PAUSE button.
Check the spin and drain functions.
Listen for a click to determine if the door is unlocking.
If SVC is needed during check, remove the remaining water by pulling out the hose cap.
10
5. OPERATION
EST. TIME REMAINING
• This display shows:
a) the estimated time remaining
in the cycle when operation.
b) an error code when an error
has been detected.
BEEPER, DELAY WASH, EXTRA RINSE button
• Use the Beeper button to turn the Beeper On/Off.
• Delay Wash allows the start of any cycle to be delayed for 1~9
hours.
• Extra Rinse provides an additional rinse.
DOOR LOCKED lamp
• Light whenever the door of the washer is locked.
• The door can be unlocked by pressing the Start/Pause
button to stop the washer.
CYCLE SELECTOR
• Press the Cycle selector to
select cycle designed for
different types of fabric and
soil levels.
OPTION button
• Prewash : Use this option for
loads that need pretreatment.
It adds 16 minutes prewash and drain.
• Quick Cycle : The Quick offers a quick
cycle time.
• Rinse+Spin : Use this option to rinse
and then spin.
POWER button
• Use this button to turn
power On/Off.
START/PAUSE button
• Use this button to start/stop the
washer.
WASH,RINSE temp., SPIN SPEED, SOIL LEVEL 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.
11
6. WIRING DIAGRAM
/
PROGRAM CHART
* *
Cool-down
12
* Wash time is in minutes.
** The total working time will vary with the load size,
water temperature and ambient temperature.
**Approx.
(Minutes)
7. TROUBLESHOOTING
7-1. BEFORE PERFORMING SERVICE
Be careful of electric shock when disconnecting parts while troubleshooting.
The voltage of each terminal is 120 V AC and DC when the unit is plugged in.
7-2. QC TEST MODE.
The washer must be empty and the controls must be in the off state.
1. Press the SPIN SPEED and SOIL LEVEL buttons simultaneously.
2. Press the Power button, while the above condition. Then buzzer will sound twice.
3. Press the Start/Pause button repeatedly to cycle through the test modes.
Number of times the
Start/Pause button is pressed
None
1 time
2 times
3 times
4 times
5 times
6 times
7 times
8 times
9 times
10 times
11 times
Check Point
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 bleach turns on.
Tumble counterclockwise.
Water temperature (Thermistor)
Drain pump turns on.
Power off and unlock the door.
Display Status rpm (40~50) rpm rpm
Water level frequency (25~65)
Water level frequency (25~65)
Water level frequency (25~65)
Water level frequency (25~65) rpm (40~50)
Water temperature [°C]
Water level frequency (25~65)
Turn off all lamps.
7-3. HOW TO CHECK THE WATER LEVEL FREQUENCY
Press the SPIN SPEED and SOIL LEVEL button simultaneously.
The digits indicate the water level frequency ( x.1 kHz ).
So, for example a display indicating 241: a Water level frequency of 241 x.1 kHz
= 24.1 kHz
13
7-4. ERROR DISPLAY
If you press the START/PAUSE button when an error is displayed, any error except disappear and the machine will go into the pause status.
will
In case of if the error is not resolved within 20 sec., or the in case of other errors, if the error is not resolved within 4 min., power will be turned off automatically and the error code will blink. But in the case of , power will not be turned off.
ERROR SYMPTOM
1
WATER INLET
ERROR
2
IMBALANCE
ERROR
CAUSE
• Correct water level (246) is not reached within 8 minutes after water is supplied or it does not reach the preset water level within 25 minutes.
• The load is too small.
• The appliance is tilted.
• Laundry is gathered to one side.
• Non distributable things are put into the drum.
3
DRAIN
ERROR
• Not fully drained within 10 minutes.
• Water is overflowing (water level frequency is over 213).
※ If is displayed, the drain pump will operate to drain the water automatically.
4
OVER FLOW
ERROR
5
PRESSURE
SENSOR
ERROR
6
DOOR OPEN
ERROR
• The SENSOR SWITCH ASSEMBLY is out of order.
• Door not all the way closed.
• Loose electrical connections at Door switch and
PWB Assembly.
• The DOOR SWITCH ASSEMBLY is out of order.
7
THERMISTOR
ERROR
• The THERMISTOR is out order.
14
8
9
11
ERROR SYMPTOM
OVER
CURRENT
ERROR
LOCKED
MOTOR
ERROR
10
BALL SENSOR
ERROR
EEPROM
ERROR
CAUSE
• MAIN PWB ASSEMBLY is out of order.
• Winding in the STATOR ASSEMBLY is short-circuited.
• The connector (3-pin, male, white) in the MOTOR
HARNESS is not connected to the connector
(3-pin, female, white) of STATOR ASSEMBLY.
• The electric contact between the connectors
(3-pin, male, white) in the MOTOR HARNESS and 4-pin, female, white connector in the MAIN PWB
ASSEMBLY is bad or unstable.
• The MOTOR HARNESS between the STATOR
ASSEMBLY and MAIN PWB ASSEMBLY is cut (open circuited).
• The hall sensor is out of order/defective.
• Loose Ball Sensor Connector.
• Ball Sensor is out of order.
※ Displayed only when the START/PAUSE button is first pressed in the QC Test Mode.
• EEPROM is out of order.
※ Displayed only when the START/PAUSE button is first pressed in the QC Test Mode.
12
POWER
FAILURE
• The washer experienced a power failure.
15
8. ERROR DIAGNOSIS AND CHECK LIST
8-1. DIAGNOSIS AND SOLUTION FOR ABNORMAL OPERATION
SYMPTOM
No power
GUIDE FOR SERVICE CALL
Is the power plug connected firmly to
120 V AC outlet?
YES
Power failure? or Breaker opened?
Is the outlet controlled by a switch?
NO
Visit to service.
Water inlet trouble
Is displayed?
YES
Is the tap opened?
YES
Is the tap frozen?
NO
Is the water supply shut-off?
NO
Is filter in the inlet valve clogged with foreign material?
YES
Clean the filter of inlet valve
NO
Visit to service.
16
SYMPTOM
Door error
GUIDE FOR SERVICE CALL
Was the load too large?
Drain trouble
Visit to service.
Visit to service.
17
SYMPTOM
Suds overflow from the appliance.
(In this condition, wash and spin do not operate normally)
GUIDE FOR SERVICE CALL
Is a low-sudsing detergent used?
YES
Is the proper amount of detergent used as recommended?
YES
Recommend to reduce the amount of detergent.
LOW-SUDSING
This appliance has an automatic suds sensing function which prevents overflow.
When excessive suds are sensed, the suds removing implementations such as drain, water input, pause will operate, without rotating the drum.
Liquid laundry products do not flow in.
Is liquid laundry product put in the correct compartment of the dispenser?
MAX
SOFTENER
YES
Is the cap clogged?
YES
Explain proper use of liquid laundry products.
Clean the compartment.
4
(4) Main Wash Compartment
Visit to service.
18
8-2. FAULT DIAGNOSIS AND TROUBLESHOOTING
CAUTION
1. Be careful of electric shock if disconnecting parts while troubleshooting.
2. First of all, check the connection of each electrical terminal with the wiring diagram.
3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.
NO POWER
(2)
(1)
Is the supplied voltage 120 V AC?
YES
NO
Check the fuse or reset the circuit breaker.
Is the voltage between the pins of 2 FILTER
ASSEMBLY connector 120 V AC?
YES
NO
Replace the FILTER
ASSEMBLY (CIRC).
Is the LED (1) on?
NO
Replace MAIN PWB
ASSEMBLY.
YES
Are the connectors (2) on the PWB loose?
YES
Reconnect.
NO
Is wire of the DISPLAY PWB ASSEMBLY broken?
YES
Replace DISPLAY PWB ASSEMBLY or repair wire.
NO
Replace the MAIN PWB
ASSEMBLY.
19
VIBRATION & NOISE IN SPIN
Have all the transit bolts and base packing been removed?
YES
NO
Is the washer installed on a solidly constructed floor?
YES
NO
Remove the transit bolts and Base packing.
Move the washer or reinforce the floor.
Check if the washer is perfectly level as follows:
Base Packing
Level
Unbalance Part
Higher
Lock
Nut
Adjustable feet
Lower
Adjustable feet
Check the leveling of the washer with a Level and check that the washer is stable.
Put an unbalance part (rubber) inside of drum and start QC test mode and run in high spin
(Refer to section 7-2).
When the machine is spinning in high speed, verify that it is stable.
If you do not have the unbalance part, put 4.5 to
6.5 lbs (2 to 3 kg) of clothing. Once loaded, press power, Rinse+Spin and the start/pause button in sequence.
When the machine is spinning in high speed, verify that it is stable.
YES
If it is not stable, adjust feet accordingly. After the washer is level, tighten the lock nuts up against of the base of the washer. All lock nuts must be tightened.
20
If it still has severe vibration and noise, regulate a specific spin speed that generates excessive vibration and noise as follows:
1) Put an unbalance part (rubber) inside of the drum.
2) Start the QC test mode (Refer to section 7-2).
3) Press Delay Wash button, then ‘ ’ is displayed.
4) Press the Spin Speed button repeatedly to select HIGH.
5) Press the Start/Pause button.
6) Press the Beeper button repeatedly to set spin speed (600, 700, 800, 900, 1000 rpm) and check if there is vibration and noise.
7) If there is no vibration and noise, increase the spin speed by pressing Beeper button.
8) If there is vibration and noise, press the Cycle selector button to reduce the Spin Speed (reduce by 50 and 100 rpm). In case of 600 rpm, it can not reduce the spin speed.
9) If vibration and noise are reduced, press the WASH/RINSE button to store (2 beep sounds).
* If you want to return to factory default spin speed setting, repeat above steps except step 8).
21
MAX
SOFTENER
4
(4) Main Wash Compartment
NO WATER SUPPLY
Is water supply shut-off?
NO
Is the tap opened?
YES
When you press both SPIN SPEED button and
SOIL LEVEL button simultaneously, is the water level frequency below 246?
NO
Is the inlet valve filter clogged?
NO
Is resistance between each terminal of INLET
VALVE ASSEMBLY 0.8-1.2 kΩ
?
YES
NO
YES
YES
NO
Open the tap.
Check the AIR CHAMBER and the tube (clogged).
Clean the filter.
Replace the INLET VALVE
ASSEMBLY.
Verify the voltage of the inlet valve connector is
120 V AC.
(Refer to 7-2 QC TEST MODE)
NO
Check electrical connection.
Replace the MAIN PWB
ASSEMBLY.
DETERGENT DOES NOT FLOW IN
Is water supplied?
YES
Are receptacles correctly connected to the terminals of the INLET VALVE ASSEMBLY?
YES
NO
Refer to
NO WATER SUPPLY
NO
Check the wiring.
Put the detergent in the correct place.
Has detergent been put in the correct compartment of the dispenser?
NO
YES
Is the detergent caked or hardened?
YES
Clean the dispenser.
22
SOFTENER/BLEACH DOES NOT FLOW IN
Hot water
Prewash
Bleach
Is water supplied?
Main wash
MAX
SOFTENER
Are the plugs correctly connected to the terminals of the INLET VALVE ASSEMBLY?
Is softener/bleach put in the correct compartment of the drawer?
Refer to
NO WATER SUPPLY
Check the wiring on the dispenser.
Put it in the correct compartment.
4
(4) Main Wash Compartment
Bleach cap
MAX
SOFTENER
SOFTENER
Softener cap
Is the softener/bleach cap clogged?
Clean the Cap and
Container.
ABNORMAL SOUND
Is the motor bolt loosened?
Is there friction noise coming from the motor?
Secure the bolt.
Replace the STATOR
ASSEMBLY or ROTOR
ASSEMBLY.
23
DRAIN MALFUNCTION
Is the drain hose twisted or frozen?
NO
Is the impeller of the drain pump clogged?
NO
Is the connector disconnected, disassembled?
NO
Is the coil of the drain pump too high or low?
(resistance of the coil is 10-20 Ω)
NO
YES
Repair the DRAIN HOSE
ASSEMBLY.
YES
Remove foreign material.
YES
YES
Reconnect or repair the connector
Replace the DRAIN
PUMP ASSEMBLY.
When checking voltage between connectors during spin, is the voltage 120 V AC as in the figure?
NO
Replace the MAIN PWB
ASSEMBLY.
24
(1) (2)
SPIN TROUBLE
Check during spin if the frequency of the water level is 248 or more.
Press the START/PAUSE button 2 times in QC
Test mode, is the drum spinning at low speed?
Is it disconnected, or disassembled?
[Red: 3pin (1), NA: 4pin (2)]
Check the motor connector, Is the resistance of the terminal the same as the figure?
MOTOR TERMINAL
Resistance of terminal:
- / - / About 5 Ω 15 Ω
Replace the MAIN PWB ASSEMBLY
Check the SENSOR SWITCH
ASSEMBLY or HOSE (Pressure).
If the problem is on the SENSOR
SWITCH ASSEMBLY or the
HOSE, replace the SENSOR
SWITCH ASSEMBLY or the
HOSE.
Normal
Correct the connection.
Replace the STATOR
ASSEMBLY
Latch Hook
(1)
Does the spring of Latch Hook actuate?
Is there clicking sound once or twice when the
START/ PAUSE button is pressed to start the cycle?
Is DOOR SWITCH ASSEMBLY broken?
25
Replace Door Assembly.
Check the DOOR SWITCH
ASSEMBLY Connector and
MAIN PWB ASSEMBLY
(Red 3 pin, Yellow 4 pin and white 3 pin connector (1)).
Replace the DOOR
SWITCH ASSEMBLY.
9. DISASSEMBLY INSTRUCTIONS
Be sure to unplug the machine out of the outlet before disassembling and repairing the parts.
CONTROL PANEL ASSEMBLY
TOP PLATE ASSEMBLY
Unscrew 2 screws on the back of the top plate.
Pull the top plate backward and upward as shown.
Disconnect the connectors from the Main PWB
Assembly
DRAWER
CONTROL PANEL
ASSEMBLY
26
Pull out the drawer and unscrew 2 screws.
Lift the left side of the Control Panel Assembly and pull it out.
27
Unscrew the 4 screws from the Control Panel
Assembly.
Disassemble the Main PWB Assembly.
Unscrew the 5 screws from the Control Panel
Assembly.
Disassemble the Display PWB Assembly.
DISPENSER ASSEMBLY
DRAWER
CONTROL PANEL
ASSEMBLY
Disassemble the top plate assembly.
Pull out the drawer.
Push out the DISPENSER ASSEMBLY after unscrew 2 screws.
Unscrew the nut at the lower part of the dispenser.
NOISE FILTER
28
Disassemble the 4 connectors from the valves.
Wire Color
Blue Housing (OR-BK)
White Housing (WH-BK)
Blue Housing (GY-BK)
Red Housing (BL-BK)
Unscrew 2 screws from the back of the cabinet.
Disassemble two connectors from the Filter
Assembly.
Unscrew a screw from the TOP BRACKET.
CABINET COVER
Unscrew the 3 screws from upper of the canbinet cover.
Unscrew the screw from filter cover.
29
Put a flat ( - ) screwdriver or putty knife into the both sides of the filter cover, and pull it out.
Unscrew the screw from the lower side of the cabinet cover.
Open the door.
Disassemble the clamp assembly.
Tilt the cabinet cover.
Disconnect the door switch connector.
NOTE: When assembling the CABINET
COVER, connect the connector.
Lift and separate the cabinet cover.
30
Disassemble the clamp assembly.
Disassemble the Gasket.
DOOR
Open the door.
Unscrew the 2 screws from the Cabinet Cover.
Disassemble the door upward.
Be careful! The door is heavy.
DOOR LOCK SWITCH ASSEMBLY
Open the door and disassemble the CLAMP
ASSEMBLY.
Unscrew the 2 screws.
NOTE
• Reconnect the connector after replacing the
DOOR SWITCH ASSEMBLY.
31
Disassemble the cabinet cover.
Separate the pump hose, the bellows and the circulation hose assembly from the pump assembly.
Disassemble the pump assembly in arrow direction.
CONNECTOR
Disassemble the Back cover.
Unscrew a screw from the Tub.
Unplug the white connector from the thermistor.
Pull it out by holding the bracket of the thermistor.
Unscrew the 4 screws from the back cover.
Unscrew the single screw from the lower-right side of the cabinet.
Disconnect the connector from PWB Harness.
32
Disassemble the back cover.
Remove the bolt.
Pull out the Rotor.
Unscrew the 2 screws from the tub bracket.
Remove the 6 bolts on the stator.
Unplug the 2 connectors from the stator.
33
Disassemble the damper hinges from the tub and base.
Separate the dampers.
NOTE
• Once removed, replace the damper with new one.
10. EXPLODED VIEW
10-1. CABINET & CONTROL PANEL ASSEMBLY
A495
A490
A450
A105
A131
A152
A141
A134
A201
A220
A303
34
10-2. DRUM & TUB ASSEMBLY
K143
K123
K111
K340
K130
K115
F463
F464
F466
F315
F465
K125
K122
K121
K311
F467
K342
K131
K346 K344 F145
35
F468
K105
10-3. DISPENSER ASSEMBLY
HOT (RED)
COLD (BLUE)
36
