LG CW2079CWN, CW2079CWD Service Manual

W ASHING MACHINE

SERVICE MANUAL

READ THIS MANUAL CAREFULLY TO DIAGNOSE PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.

MODEL: CW2079CWD/CW2079CWN

CAUTION

JUNE. 2007 PRINTED IN KOREA

P/No.: MFL30599105

CONTENTS

1. IMPORTANT SAFETY INSTRUCTIONS.......................................................................................3

2. SPECIFICATIONS.........................................................................................................................4

3. FEATURES AND TECHNICAL EXPLANATION........................................................................... 5

4. PARTS IDENTIFICATION ............................................................................................................ 7

5. INSTALLATION INSTRUCTIONS................................................................................................. 8

6. OPERATION..........................................................................................................................14~16

7. WIRING DIAGRAM/PROGRAM CHART.....................................................................................17

8. TROUBLESHOOTING...........................................................................................................18~20

8-1. BEFORE PERFORMING SERVICE...................................................................................18

8-2. QC TEST MODE.................................................................................................................18

8-3. HOW TO CHECK THE WATER LEVEL FREQUENCY......................................................18

8-4. HOW TO CHECK THE RPM...............................................................................................18

8-5. ERROR DISPLAY ...............................................................................................................19

9. DIAGNOSIS AND TROUBLESHOOTING.............................................................................21~28

10. DISASSEMBLY INSTRUCTIONS .......................................................................................29~38

11. EXPLODED VIEW .....................................................................................................................39

11-1. CABINET & CONTROL PANEL ASSEMBLY....................................................................39

11-2. DRUM & TUB ASSEMBLY................................................................................................40

11-3. DISPENSER ASSEMBLY .................................................................................................41

1. IMPORTANT SAFETY INSTRUCTIONS

READ ALL INSTRUCTIONS BEFORE USE

WARNING!

For your safety, the information in this manual must be followed to minimize the risk of fire or explosion, electric shock, or to prevent property damage, personal injury, or loss of life.

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SSAAFFEETTYY IINNSSTTRRUUCCTTIIOONNSS

• Read all instructions before using the washer.

• Do not wash articles that have been previously cleaned in, washed in, soaked in, or spotted with gasoline, dry cleaning solvents, or other flammable or explosive substances, as they give off vapors that could ignite or explode.

• Do not add gasoline, dry cleaning solvents, or other flammable or explosive substances to the wash water. These substances give off vapors that could ignite or explode.

• Under certain conditions, hydrogen gas may be produced in a hot water system that has not been used for 2 weeks or more. HYDROGEN GAS IS EXPLOSIVE. If the hot water system has not been used for such a period, before using the washing machine, turn on all hot water faucets and let the water flow from each for several minutes. This will release any accumulated hydrogen gas. As the gas is flammable, do not smoke or use an open flame during this time.

• Do not allow children to play on or in the washer. Close supervision of children is necessary when the washer is used near children.

• Before the washer is removed from service or discarded, remove the door to prevent children from hiding inside.

• Do not install or store the washer where it will be exposed to the weather.

• Do not tamper with controls.

• Do not repair or replace any part of the washer or attempt any servicing unless specifically recommended in the user-maintenance instructions or published user-repair instructions that you understand and have the skills to carry out.

• See Installation Instructions for grounding requirements.

• ALWAYS follow the fabric care instructions supplied by the garment manufacturer.

• Do not place items exposed to cooking oil in your washer. Items contaminated with cooking oils may contribute to a chemical reaction that could cause a load to catch fire.

• Do not use fabric softeners or products to eliminate static unless recommended by the manufacturer of the fabric softener or product.

WARNING: To reduce the risk of fire, electric shock, or injury to persons when using the washer, follow basic

precautions, including the following:

SSAAVVEE TTHHEESSEE IINNSSTTRRUUCCTTIIOONNSS

This appliance must be grounded. In the event of malfunction or breakdown, grounding will reduce the risk of electric shock by providing a path of least resistance for electric current. This appliance is equipped with a cord having an equipment-grounding conductor and grounding plug. The plug must be plugged into an appropriate outlet that is properly installed and grounded in accordance with all local codes and ordinances.

• Do not use an adapter or extension cord.

• Do not remove ground prong.

• If you don’t have the proper outlet, consult an electrician.

GROUNDING INSTRUCTIONS

WARNING: Improper connection of the equipment-grounding conductor can result in risk of electric shock.

Check with a qualified electrician or serviceman if you are in doubt as to whether the appliance is properly grounded. Do not modify the plug provided with the appliance - if it does not fit the outlet, have a proper outlet installed by a qualified electrician.

2. SPECIFICATIONS

MODEL CW2079CWD/CWN

COLOR BLUE WHITE POWER SUPPLY 120V~, 60 Hz PRODUCT WEIGHT 190 lbs. (86 kg)

WASHING 155 W

DRAIN MOTOR 80 W

WASH 45 rpm

SPIN

0-1000 rpm

CYCLES 4

OPTIONS ADD SUPER WASH Cycle

OPERATIONAL WATER PRESSURE 14.5-116 psi (100-800 kPa)

CONTROL TYPE Electronic

WASH CAPACITY [cu. ft.] 3.32 (IEC 3.83)

DIMENSIONS 27” (W) X 293/4” (D) X 3811/16” (H), 5013/16” (D, door open)

DOOR SWITCH TYPE PTC + Solenoid

WATER LEVEL 10 steps (by sensor)

LAUNDRY LOAD SENSING Incorporated

ERROR DIAGNOSIS Incorporated

ELECTRIC POWER CONSUMTION

REVOLUTION SPEED

3. FEATURES & TECHNICAL EXPLANA TION

3-1. FEATURES

■ Direct Drive System

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

■

The Tilted Drum and Extra Large Door Opening

Tilted drum and extra large door opening make it possible to load and unload easily.

■

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.

■

Large Door and Window

The large window lets you see the wash as it progresses.

■

The Stainless Steel drum

Stainless Steel Drum doesn't rust.

■

Automatic Wash Load Detection

Automatically detects the load and optimizes the washing time.

3-2. 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; then the selected cycle begins.

● Spinning does not proceed until the water in the tub drains to a certain level.

3-3. 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 2 minutes.

● Clicking sounds can be heard when the door is locked/unlocked.

3-4. THE DOOR CAN NOT BE OPENED

● While program is operating.

● While Door Lock lights turn on.

● While the drum is rotating.

3-5. 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 (104° F) 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 (113° F). )

4. PARTS IDENTIFICATION

■ ACCESSORIES

5. INSTALLATION INSTRUCTIONS

Unscrew the 4 bolts with the wrench supplied Take out the 4 bolts by twisting the braces slightly

Keep the

4 bolts and the wrench for future use (Whenever the appliance is transported, the shipping bolts and braces must be replaced.)

Close the holes with the caps supplied.

The appliance is fitted with shipping bolts to prevent internal damage during transportation. Packing and all shipping bolts must be removed before using the washer.

☞ When unpacking the base, be sure to remove

the additional packing support in the middle of the base packing.

■ Shipping bolts

• Washer is heavy. Two or more people may be needed to install and move the appliance.

Failure to do so can result in back or other injury.

• Store and install the washer where it will not be exposed to temperatures below freezing or exposed to

outdoor weather conditions. Failure to follow this warning can cause serious injury, fire, electrical shock, or

death.

• This appliance must be properly grounded for personal safety. Properly ground washer to conform with all governing codes and ordinances. Failure to follow this warning can cause serious injury, fire, electrical shock, or death.

• Do not install the washer in humid spaces to reduce the risk of electric shock. Failure to follow this warning can cause serious injury, fire, electrical shock or death.

• The base opening must not be obstructed by carpeting when the washer is installed on a carpeted floor.

• Do not remove ground prong. Do not use an adapter or extension cord. Plug into a grounded 3 prong outlet.

Failure to follow this warning can cause serious injury, fire, electrical shock or death.

■ Removing shipping bolts

CAP

WARNING

Wrench

■ Installation clearances

The location must be large enough to open the washer door completely.

■ Washer dimensions

The following dimensions shown are for the minimum spacing allowed. Additional spacing should be considered for installation and servicing.

• Additional clearances might be required for wall, door, and floor moldings.

• Additional spacing of 4 (10 cm) on back, 1 (2.5 cm) on all sides of the washer is

recommended to reduce noise transfer.

Companion appliance spacing should also be considered.

■ Minimum installation spacing for

recessed area installation.

Front view

Side view

27"

(68.6 cm)

(75.6 cm)

(98.3 cm)

(129.1 cm)

29 3/4"

(75.6 cm)

(10 cm)

27"

(68.6 cm)

(2.5 cm)

• Must be within 60 (1.5 m) of either side of the

washer. Do not overload the outlet with more than one appliance.

• Time-delay fuse or circuit breaker is recommended.

NOTE: It is the personal responsibility and obligation

of the customer to have a proper outlet installed by a qualified electrician.

■ Level floor

• Allowable slope under entire washer is 1°.

• To minimize noise and vibration, the washer MUST be installed on a solidly constructed floor.

• Carpeting and soft tile surfaces are not recommended.

• Never install the washer on a platform or weakly supported structure.

NOTE: A firm, solid floor is even more critical to a

front-loading washer than to a top-loader. If your floor is wood and/or frame construction, you may need to reinforce it. Front-loaders use substantially faster spin speeds than top-loaders, causing greater vibration. If the floor is not solid, your washer will vibrate. You will hear and feel the vibration throughout your house.

· Connect the power plug to the wall outlet. · Avoid connecting several electric devices, as doing so may cause a fire.

■

CONNECT POWER PLUG

■

INST ALL THE APPLIANCE ON A FLA T AND FIRM SURFACE

solid floor

■ Level adjustment

• Leveling the washing machine properly prevents excessive noise and vibration. Install the appliance on a solid and level floor surface, preferably in a corner of the room.

• If the floor is uneven, adjust the adjustable feet as required. (Do not insert pieces of wood, etc. under the feet.)

NOTE: Extend the feet no more than necessary to level

the washer. The more the feet are extended, the more the washer will vibrate.

• Make sure that all four feet are stable and resting on the floor and then check that the appliance is perfectly level (Use a level).

• After the washer is level, tighten the lock nuts up against of the base of the washer. All lock nuts must be tightened.

• It is critical to adjust the feet perfectly. This must be done while the washer is spinning with a load. Use the wrench (supplied) to adjust the feet until there is no vibration. Then tighten the lock nuts to prevent further adjustment.

NOTE: If there is vibration and noise during the spin

cycle, re-check the leveling of the washer, adjust the feet as required, and tighten the lock nuts securely to prevent changes in adjustment. Run the washer with a test load to make certain your washer is properly leveled. Put an unbalance weight part in the machine. You can check noise and/or vibration on high speed spin rpm through the QC test mode (refer to page 18). When the machine spins at high speed, verify that it is stable. If not, adjust the feet accordingly.

✽ Diagonal Check

When pushing down the edges of the washing machine top plate diagonally, the machine should not move up and down at all. (Please, check both directions.)

Lock nut

Adjustable feet

Adjustable feet Adjustable feet

• Water supply pressure must be between

14.5 and 116 psi (100~800 kPa).

• Do not crossthread when connecting the inlet hose to the valve.

• If the water supply pressure is more than 116 PSI, a pressure reducing device should be installed.

• Two sealing washers are supplied with the water inlet hoses to prevent water leaks.

• Check for leakage of washing machine connections by turning the tap completely on.

• Periodically check the condition of the hose and replace the hose if necessary.

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

• Be sure that the two water input ports are connected to the correct water faucets. The connector for hot water is colored red; the cold is blue.

■ Connecting the water supply hoses

NOTE: Use new hoses when installing a washing machine. Replace them periodically.

Old hoses should not be used.

■ Electrical connection

• Do not use an extension cord or double adapter.

• If the supply cord is damaged, it must be replaced by a qualified person in order to avoid a hazard.

• If the machine will not be used for an extended time, unplug it and shut off the water supply.

• Connect the machine to a grounded outlet in accordance with current wiring regulations.

• The appliance must be positioned so that the plug is easily accessible.

Do not install your washing machine in a room where temperatures below freezing may occur. Frozen hoses may burst under pressure. The reliability of the electronic control unit may be impaired at temperatures below the freezing point.

If the appliance is delivered in the winter months and temperatures are below freezing, store the washing machine at room temperature for a few hours before putting it into operation.

WARNING! Concerning the power cord

Most appliances recommend they be placed upon a dedicated circuit; that is, a single outlet circuit which powers only that appliance and has no additional outlets or branch circuits. Check the specification page of this owner's manual to be certain.

Do not overload wall outlets. Overloaded wall outlets, loose or damaged wall outlets, extension cords, frayed power cords, or damaged or cracked wire insulation are dangerous. Any of these conditions could result in electric shock or fire. Periodically examine the cord of your appliance, and if its appearance indicates damage or deterioration, unplug it, discontinue use of the appliance, and have the cord replaced with an exact replacement part by an authorized servicer.

Protect the power cord from physical or mechanical abuse, such as being twisted, kinked, pinched, closed in a door, or walked upon. Pay particular attention to plugs, wall outlets, and the point where the cord exits the appliance.

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