LG WM1812CW, WM1812, WM1814CW Service Manual

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WASHING MACHINE

SERVICE MANUAL

! CAUTION

READ THIS MANUAL CAREFULLY TO DIAGNOSE

PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.

MODEL: WM1812CW/WM1814CW

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JUN. 2004 PRINTED IN KOREA						P/No.:3828ER3027F

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CONTENTS
1. SPECIFICATIONS .........................................................................................................................	3
	3
2. FEATURES & TECHNICAL EXPLANATION ................................................................................	4
	4
3. PARTS IDENTIFICATION ............................................................................................................	7
	7
4. INSTALLATION & TEST ...............................................................................................................	8
	8
5. OPERATION ................................................................................................................................	11
	11
6. WIRING DIAGRAM/PROGRAM CHART.....................................................................................	14
	12
7. TROUBLESHOOTING.................................................................................................................	16
	13
7-1. BEFORE PERFORMING SERVICE ...................................................................................	16
	13
7-2. QC TEST MODE.................................................................................................................	16
	13
7-3. HOW TO CHECK THE WATER LEVEL FREQUENCY ......................................................	16
	13
7-4. ERROR DISPLAY ...............................................................................................................	17
	14
8. ERROR DIAGNOSIS AND CHECK LIST ....................................................................................	19
	16
8-1. DIAGNOSIS AND SOLUTION FOR ABNORMAL OPERATION ........................................	19
	16
8-2. FAULT DIAGNOSIS AND TROUBLESHOOTING ..............................................................	22
	19
9. DISASSEMBLY INSTRUCTIONS ...............................................................................................	31
	26
10. EXPLODED VIEW .....................................................................................................................	40
	34
10-1. CABINET & CONTROL PANEL ASSEMBLY....................................................................	40
	34
10-2. DRUM & TUB ASSEMBLY................................................................................................	41
	35
10-3. DISPENSER ASSEMBLY .................................................................................................	42
	36

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1. SPECIFICATIONS

	ITEM				WM1812CW/WM1814CW
	COLOR				BLUE WHITE
	POWER SUPPLY				AC 120 V, 60 Hz
	PRODUCT WEIGHT				173 lbs. (78.5 kg)
	ELECTRIC POWER			WASHING	280 W
				DRAIN MOTOR	80 W
	CONSUMTION
				WASH HEATER	–
	REVOLUTION SPEED			WASH	46 rpm
				SPIN	0-900 rpm
	CYCLES				5
	WASH/RINSE TEMPERATURES				5
	SPIN SPEEDS				5
	OPTIONS				Prewash, Quick Cycle, Extra Rinse, Rinse+Spin, Delay Wash
	CUSTOM PROGRAM				–
	WATER CIRCULATION				–
	OPERATIONAL WATER PRESSURE				4.5-116 psi (800 kPa)
	CONTROL TYPE				Electronic
	WASH CAPACITY				2.96 cu. ft (3.42 cu. ft. IEC)
	DIMENSIONS				27” (W) X 301/32” (D) X 3811/16” (H), 5013/16” (D, door open)
	DELAY WASH				up to 9 hours
	DOOR SWITCH TYPE				PTC + Solenoid
	WATER LEVEL				9 steps (by sensor)
	LAUNDRY LOAD SENSING				Incorporated
	ERROR DIAGNOSIS				Incorporated
	AUTO POWER OFF				Incorporated
	CHILD LOCK				Incorporated

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2. FEATURES & TECHNICAL EXPLANATION

2-1. FEATURES

Direct Drive System

The advanced Brushless DC motor directly drives the drum without belt and pulley.

	Tilted Drum and Large Door Opening
5	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.

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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	NEURO-		the best
			rinsing time	washing
	washing
	temperature	FUZZY		performance
			spin rhythm, time
	load
	size
	SENSING	PROCESSING	DETERMINATION	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.

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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.

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3. PARTS IDENTIFICATION

ACCESSORIES

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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	INSTALL THE APPLIANCE	ADJUST THE
BOLTS	ON A FLAT AND FIRM SURFACE	LEVELING
Remove the 4 shipping bolts		Turn the leveling feet to adjust
with the supplied wrench.		the appliance.
Do first lower side to remove easily.
Keep the shipping bolts and
spanner for future use.
Insert the 4 caps
(provided) into the hole.

Turn clockwise to raise; counterclockwise to lower.

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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.

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TEST OPERATION

Preparation for	Press the POWER button.	Press the Start/Pause
washing.		button.

Connect the power plug to the outlet.

Connect the inlet hoses.

Listen for a click to determine if the door has locked.

Check the water	Check the automatic	Check the water supply.
temperature.	reverse rotation.

Press the WASH/RINSE button and the present temperature will be displayed.

Check if the drum rotates clockwise and counterclockwise.

Check if water is supplied through the detergent dispenser.

Check the drain and spin functions.

Power off and the power on.

Press the SPIN SPEED button.

Press the START/PAUSE button. Check the spin and drain functions.

Press the	Water removal
START/PAUSE button.

Listen for a click to determine
	If SVC is needed during check,
if the door is unlocking.	remove the remaining water by
	pulling out the hose cap.

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5. OPERATION

EST. TIME REMAINING	BEEPER, DELAY WASH, EXTRA RINSE button
• This display shows:	• Use the Beeper button to turn the Beeper On/Off.
a) the estimated time remaining	• Delay Wash allows the start of any cycle to be delayed for 1~9
in the cycle when operation.	hours.
b) an error code when an error	• Extra Rinse provides an additional rinse.
has been detected.

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

POWER button

• Prewash : Use this option for

• Use this button to turn

loads that need pretreatment.

power On/Off.

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.

START/PAUSE button

WASH,RINSE temp., SPIN SPEED, SOIL LEVEL button

•Use this button to start/stop the washer.

•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.

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6. WIRING DIAGRAM/PROGRAM CHART

	Cool-down	**Approx.
		(Minutes)
*	*

* Wash time is in minutes.

** The total working time will vary with the load size, water temperature and ambient temperature.

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