LG WT5070C series, wt4970cw, wt4901cw Service Manual
WASHING MACHINE
SERVICE MANUAL
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
CAUTION
MODEL : WT5070C*
SAFETY PRECAUTION!
IMPORTANT SAFETY NOTICE!
2
This service information is intended for individuals possessing adequate backgrounds of
electrical, electronic, and mechanical experience. Any attempt to repair this appliance may result
in personal injury or property damage. The manufacturer or seller can not be responsible for the
interpretation of this information, nor can it assume any liability in connection with its use.
WARNING: To reduce the risk of fire, electric shock, or personal injury when using this
appliance, follow basic precautions, including the following:
·Wear gloves when working.
Failure to do this can result in serious injury.
·The appliance is heavy. Two or more people are
required when moving the appliance.
There is a risk of serious back injury or other injuries.
·Certain internal parts are intentionally not
grounded and may present a risk of electric
shock only during servicing. Service personnel Do not contact the following parts while the
appliance is energized: Pump bracket, rotor, and
heater.
·Disconnect this appliance from the power
supply before servicing. Turning the controls to
the off position does not disconnect this
appliance from the power supply.
Failure to do this can result in shock.
·Reconnect all grounded devices after servicing.
Failure to do this can result in shock.
CONTENTS
1. Specifications ............................................ 3
2. Installation Instructions
2-1. How to Adjust Level ............................4
2-2. Connecting Water Supply Hose ........ 6
2-3. Connect the Drain Hose .................... 7
3. Operating Instructions
3-1. Identification of Parts ......................... 8
3-2. Before Starting to Wash .................... 9
3-3. Function of Each BUTTON ............. 16
3-4. Washing Programs ......................... 18
3-5. Care and Maintenance .................... 19
4. Service Information
4-1. Disassembly Instruction ................... 21
4-2. Wiring Diagram ................................ 27
4-3. Test Running Without Water ............ 28
4-4. Troubleshooting By Common
Washing Problems .......................... 29
4-5. Troubleshooting Summary ................30
4-6. Troubleshooting with Error Code.......31
4-7. Other Troubleshooting.......................36
5. Component Testing Information ................38
5-1. Filter Assembly (Line Filter)...............38
5-2. Door Lock Switch Assembly ..............39
5-3. Stator Assembly ................................41
5-4. Pump Motor Assembly ......................44
5-5. Inlet Valve Assembly .........................45
5-6. Thermistor Assembly.........................46
6. Exploded View ........................................ 48
7. Replacement Part List ............................. 52
1. SPECIFICATIONS
3
Model
Electrical
Inner Tub
Inlet Water Pressure
Rating of Fuse
Spin Speed
Weight
Cycles
Time Delay
Lid Interlock Switch
Control Lock
Softener Dispenser
Detergent Dispenser
Bleach Inlet
Auto Power Off
Smart Rinse™ with Jet Spray
Heater
WT5070C*
120 VAC@60 Hz.
Stainless
14.5 ~ 116 PSI (100 ~ 800 kPa)
120V/60Hz
1100±50 rpm
145.5 lbs (66kg)
Cotton/Normal, Perm.Press Casual, Heavy Duty, Bulky/Bedding, Bright Whites™ , Tub Clean, Wool, Speed
Wash, Pure Color™, Sports Wear, Baby Wear, Towels, Rinse & Spin, Spin Only
1 – 19 Hr
Magnet Sensor
Yes
Yes
Yes
Yes
Yes
Yes
No
4
2. INSTALLATION INSTRUCTIONS
2-1. HOW TO ADJUST LEVEL
4
Raise Lower
CAUTION
•
The ventilating openings in the base area must not be obstructed by carpeting.
•
Install the washing machine on a level and firm surface. There should be no more than 1° of variation.
•
Wooden floors may need reinforcing to prevent the normal vibration which occurs
with an unbalanced load.
•
Do not install the washer on an inclined floor.
Improper installation of the washer may cause noise and malfunctioning.
1
Installation area
•
Install the washer on a firm, flat
surface.
•
If the washer is installed on an
unsuitable floor, it could make
considerable noise and vibrate.
2
3
Checking level
• Open the lid, check if the washer is
correctly leveled by looking down
from the top. If the tub is not
centered in the opening, then the
washer is not level.
WRONG RIGHT
No shims. It would be dangerous. If the
floor is that far from being level, it is a floor
problem and not a washer problem.
Set Leveling feet
• Loosen the locknuts on 2 front leveling
feet until you can turn the feet with the
included wrench. Turn clockwise to
raise the washer or counterclockwise
to lower it.
Checking slope
•
If installation surface is tilted, the
washer will vibrate. Do not install
on a sloping floor.
5
28.13/64″
(72.1 cm)
4″
(10 cm)
55.
13
/16″
(141.7 cm)
(with lid
open)
6
7
5
Lower
Raise
Confirming level
• Place the washer in original position,
confirming the level.
Horizontal setting
• Lift the front of the washer and adjust
level by turnings the adjustable legs or
using the adjusting plate.
Distance between the drain hose
and the wall
• Distance between the drain hose and
the wall should be more than 4 inches
(10 cm,) and the distance between any
other part and the wall should be more
than 1 inches (2.5 cm.)
Do not install the washer in the following places.
•
Where the washer is exposed to direct sunlight.
• Near a heater or heating appliance.
• Where the washer is exposed to freezing temperatures.
•
In damp environments such as bathrooms or harmful environments.
1
Be sure there is a gasket in both ends of the hose.
Push the water supply hose up so that the rubber packing
within the hose can adhere completely to the tap.
2
Connect the water supply hose to the tap.
Run a couple of gallons of water through the hoses into the drain or a
bucket to flush any particulate or contaminate.
3
Check water leakage.
After connecting the hose, open the tap to check for
any water leakage.
Connecting Water Supply Hose to the Machine
• Be sure there is a gasket in the end of the hose.
• Connect the hose to the appropriate inlet vale
(hot or cold) of the washing machine and tighten
if firmly.
• Turn on the water and check for leacks.
• Always install new hoses with a new washing
machine Do not re-use old hoses.
• Relplace the hoses every five years.
Screw Type
Water tap
Rubber Seal
Water Supply Hose
Cold water inlet
Hot water inlet
2-2. CONNECTING WATER SUPPLY HOSE
6
Before connecting the water supply hose to the water tap, check the hose type and then choose the
correct instruction here below.
7
2-3. CONNECT THE DRAIN HOSE
35"~47" (0.9~1.2m)
35"~47" (0.9~1.2m)
• Connect the drain hose to the
outlet of the drain pump located at
the rear of the washing machine.
Attach the clip to the drain hose.
• And then push it toward the body of
the washing machine as indicated
by the arrow.
• Check that the drain hose is hung
up over the edge of the laundry tub.
• Do not use an extension hose.
NOTE : • The drain hose should always be properly secured to the drain or standpipe. Failure to secure
the drain hose properly can result in flooding and property damage.
• The end of the drain hose should be placed 39" (99 cm) above the floor.
• The drain must be installed in accordance with any applicable local codes and regulations.
• Make sure that the water lines are not stretched, pinched, crushed, or kinked.
• Do not insert the drain hose more than 12” (30 cm) into the drain pipe to avoid siphoning and
odor build-up.
Cable Tie
Cable Tie
WARNING:
• The washer should never be installed or stored in a location subject to freezing temperatures. If the
washer was exposed to freezing temperatures prior to installation, allow it to stand at room
temperature for several hours before use. Damage to the water lines and internal mechanisms of
the washer can result.
• Water supply pressure must be between 14.5 psi and 116 psi (100 ~ 800kPa) If the water supply
pressure is more than 116 psi, a pressure reducing valve must be installed. If you have
uncontrolled water temperature and pressure you should fit a temperature and pressure relief valve
to ensure that water temperature and water pressure remain within the safe limits. Consult a
plumber or electrician if you are unable to adjust water temperature and or pressure. Failure to do
so can result in damage to the machine.
• Plug the power cord of washer into a properly grounded outlet. Failure to do this can result in shock
or serious injury.
8
3. OPERATING INSTRUCTION
3-1. IDENTIFICATION OF PARTS
POWDER DETERGENT
BOX for delayed
washing/softener additves box
INLET HOLE FOR
BLEACH
WASHING WING
(unique with lnner Tub)
LEVELLING LEGS
Use to level the washing
machine for correct balance
spin operation.
TUB
COLD WATER SUPPLY
HOSE
HOT WATER SUPPLY
HOSE
Make sure the water
does not leak.
POWER PLUG
If the supply cord is
damaged, it must be
replaced by the
manufacturer
or its service agents
or similarly qualified
person in order to
avoid a hazard.
FUNCTION SELECTOR
BASE
DRAIN HOSE
Be sure the drain hose
is properly installed on
the drain before
operating the washer.
SMART RINSE WITH
JET SPRAY
This washer is designed
to save rinse water by
using a jet spray rinse
system in the
Normal/Casual and
Heavy Duty cycles.
9
3-2. BEFORE STARTING TO WASH
Care Labels
• Look for a care label on your clothes.
This will tell you about the fabric content of your garment and how it should be washed.
Sort clothes into loads that can be washed with the same wash cycle, water temperature,
and spin speed.
Sorting
To get the best results, different fabrics need to be washed in different ways.
• SOIL (Heavy, Normal, Light) Separate clothes according to the type and amount of soil.
• COLOR (Whites, Lights, Darks) Separate white fabrics from colored fabrics.
• LINT (Lint producers, Collectors) Separate lint producers and lint collectors.
Lint Producers Terry cloth, Chenille, Towels, Diapers
Lint Collectors Synthetics, Corduroy, Permanent Press, Socks
Check before Loading
• Check all pockets to make sure that they are empty. Things such as nails, hairclips, matches,
pens, coins, and keys can damage both your washer and your clothes.
• Mend any torn garments or loose buttons. Tears or holes may become larger during washing.
• Remove belts, underwires, etc. to prevent damage to the machine or your clothes.
• Pretreat any dirt and stains.
• Make sure the clothes are washable in water.
• Check the washing instructions.
• Remove any paper or tissue in the pockets.
• Be sure the wire supports in undergarments are secure and will not become loose in the washer.
Loading
Do not wash fabrics containing flammable materials (waxes, cleaning fluids, etc.).
Load Size
The WATER LEVEL should just cover the clothes. Adjust the load size
accordingly. Loosely load clothes no higher than the top row of holes in the
washer tub. To add items after washer has started, press the START button and
submerge additional items. Close the lid and press the Start button again to restart.
※ Do not wash waterproofed fabrics (such as skiing outfits, diapers, or nappy
auto seat covers.)
Light and Large-sized clothing
Clothes like downs and woolens are lightweight, large, and float easily. Use a nylon net and
wash them in a small amount of water. If the laundry floats during the wash cycle, it may
become damaged. Use dissolved detergent to prevent the detergent from clumping.
※ Do not wash water-proof textilles (Skiing outfit, baby diaper, nappy automobile seat covers.)
Long laundry items
Use nylon bag nets for long, delicate items. For laundry with long strings or long length, a bag will prevent
tangling during washing. Fasten zippers, hooks, and strings to make sure that these items don't snag on
other clothes.
※ The nylon net bag can be purchased locally.
Pretreatment on stains or heavy soil
• Pretreat shirt collars and cuffs with a pre-wash product or liquid detergent when placing them in the washer.
Before washing treat special stains with bar soaps, liquid detergent, or a paste of water and powdered detergent.
• Use a pretreat soil and stain remover.
Treat stains AS SOON AS POSSIBLE. The longer they are left, the harder they are to remove.
(For more detail refer to page 14-15)
WIRE
10
1) Using Water
Water Temperature
• The machine sets the appropriate temperature automatically according to the wash program .
You can override the preset selection by pressing the water temperature icon. Touch the arrow buttons up or
down until your desired temperature setting is displayed.
• The temperature of the water impacts the effectiveness of all laundry additives and, therefore, the cleaning results.
• We recommend temperatures of:
- HOT 120°F (120-140°F) White items, diapers, underclothing and heavily soiled, colorfast items.
- WARM 90°F (85-105°F) Most items
- COLD 66°F (65-75°F) Only very bright colors with light soil.
• When washing in COLD water additional steps may be needed:
- Adjust detergent amount and pre-dissolve detergent in WARM water
- Pretreat spots and stains
- Soak heavily soiled items
- Use appropriate bleach
* Temperature below 18°C (65°F) will not activate laundry additives and may cause lint, residue, poor cleaning, etc.
In addition, detergent manufactures and care labels define COLD water as 26~29°C (80-85°F).
If the temperature of the water in the tub is too cold for your hands, the detergent will not activate and clean
effectively.
Note
If iron is present in the water, the clothes may become an all-over yellow or they may be stained with brown or
orange spots or streaks. Iron is not always visible. Installation of water softener or an iron filter may be
necessary for severe cases.
11
Using the Liquid Bleach Dispenser
The bleach dispenser automatically dilutes and dispenses
liquid chlorine bleach at the proper time in the wash cycle.
1. Check clothing care labels for special instructions.
2. Measure liquid bleach carefully, following instructions on the
bottle.
• Never pour undiluted liquid chlorine bleach directly onto clothes
or into the wash basket.
• Do not pour powdered bleach into bleach dispenser.
• Avoid overfilling or splashing when adding bleach to the
dispenser. The maximum capacity of the bleach dispenser is
one cup of bleach per wash cycle. Overfilling could result in
premature dispensing of bleach.
Do NOT add more bleach than is required for your particular load.
3. Before starting the washer, pour measured amount of liquid bleach
directly into bleach dispenser. If you prefer to use powdered
bleach, add it into the wash basket directly before adding clothes.
WARNING Do NOT mix chlorine bleach with ammonia or acids, such as vinegar or rust / scale remover.
Mixing chemicals like these can produce irritating and toxic fumes. Put the manufacturer’s recommended amount of
undiluted liquid chlorine bleach into the bleach dispenser. During the final portion of the wash cycle, two sequential flushes
of the dispenser put all the bleach into the wash load and completely flush the dispenser to eliminate the carryover of
bleach to a subsequent load. Any liquid remaining in the bleach dispenser at the end of the cycle is water, not bleach. To
prevent unintentional self-siphoning of the bleach, never fill the dispenser higher than the maximum fill level marked on
the dispenser. When adding bleach to the dispenser, be careful to avoid spilling it into the laundry load or leaving droplets
of bleach around the dispenser. These things will damage your laundry items.
2) Using Detergent
Detergent
Follow the detergent package directions. Using too little detergent is a common cause of laundry problems.
Use more detergent if you have hard water, large loads, greasy or oily soils or lower water temperature.
Choosing the Right Detergent
Your washing machine is designed for use with only High-Efficiency (HE) detergents. HE detergents are
formulated specifically for HE machines and contain suds-reducing agents. Always look for the HE symbol when
purchasing detergent. HE detergents produce fewer suds, dissolve more efficiently to improve washing and
rinsing performance, and help to keep the interior of your washer clean. Using a regular detergent will cause
unsatisfactory performance, oversudsing, machine build-up, and could damage the machine.
12
Using the Dispenser Drawer
ABOUT THE DISPENSER
The automatic dispenser consists of two
compartments which hold:
• Liquid fabric softener.
• Liquid or powdered detergent.
All laundry products can be added at once in their respective
dispenser compartments. They will be dispensed at the
appropriate time for the most effective cleaning.
After adding the laundry products to the dispenser,
close the dispenser drawer.
Close the dispenser drawer gently to avoid spilling or starting the
siphoning action.
To add detergent, bleach, and fabric softener
to the automatic dispenser:
❶ Open the dispenser drawer.
❷ Load the laundry products into the appropriate compartments.
❸ Close the lid slowly and smoothly to avoid spilling, splashing, or
premature dispensing of the contents.
NOTE: It is normal for a small amount of water to remain in the
dispenser compartments at the end of the cycle.
NOTE: Do not use powdered or liquid bleach in the dispenser drawer.
Main Wash
Liquid Detergent
Compartment
Main Wash
Powder Detergent
Compartment
Liquid Fabric
Softener
Compartment
13
Adding Detergent
Add measured detergent to the detergent compartment of the
dispenser drawer.
• Do not exceed the maximum fill line.
Detergent is flushed through the dispenser at the beginning of
the wash cycle. Either powdered or liquid detergent can be
used, but the drawer insert must be removed to use powder.
Detergent usage may need to be adjusted for water
temperature, water hardness, size, and soil level of the load.
Avoid using too much detergent in your washer, as it can lead
to oversudsing and detergent residue being left on the clothes.
Adding Fabric Softener
Pour the recommended amount of liquid fabric
softener into the left-hand compartment. Use only liquid fabric
softener.
Dilute with water to the maximum fill line.
• Do not exceed the maximum fill line.
Overfilling can cause early dispensing of the fabric softener,
which could stain clothes.
NOTE: Do not pour fabric softener directly on the wash load.
It may stain the clothes.
If you use an ultra-thick fabric softener, you might
want to dilute it with water so it dispenses easily.
Adding Wash Boost Additives
The wash boost dispenser may be used to clean heavily soiled
or stained garments more efficiently.
If desired, place the additives for the wash boost setting in the
right-hand compartment. Use only liquid additives.
• Do not exceed the maximum fill line to avoid detergent buildup
In clothing and the washer
Overfilling can cause early dispensing of presoak additives,
which could result in damaged clothes.
NOTE : Do not pour additives directly on the wash load. It may stain the clothes.
14
3) Special Guide for Stain Removal
WARNING
Do not use or mix liquid chlorine bleach with other household chemicals such as toilet cleaners, rust removers, acid, or products
containing ammonia. These mixtures can produce dangerous fumes which can cause serious injury or death.
To reduce the risk of fire or serious injury to persons or property, comply with the basic warnings listed below:
•
Read and comply with all instructions on stain removal products.
•
Keep stain removal products in their original labeled containers and out of children's reach.
•
Thoroughly wash any utensil used.
•
Do not combine stain removal products, especially ammonia and chlorine bleach. Dangerous fumes may result.
•
Never wash items which have been previously cleaned in, washed in, soaked in or spotted with gasoline, dry cleaning solvents, or
other flammable or explosive substances because they give off vapors that could ignite or explode.
•
Never use highly flammable solvents, such as gasoline, inside the home. Vapors can explode on contact with flames or sparks.
For successful stain removal:
• Remove stains promptly.
• Determine the kind of stain, then follow the recommended treatment in the stain removal
chart below.
• To pretreat stains, use a prewash product, liquid detergent, or a paste made from
powdered detergent and water.
• Use COLD water on unknown stains because HOT water can set stains.
• Check care label instructions for treatments to avoid on specific fabrics.
• Check for colorfastness by testing stain remover on an inside seam.
• Rinse and wash items after stain removal.
15
Adhesive tape, chewing
gum, rubber cement
Baby formula, dairy
products, egg
Beverages (coffee, tea, soda,
juice, alcoholic beverages)
Blood
Candle wax, crayon
Chocolate
Collar or cuff soil, cosmetics
Dye transfer on white fabric
Grass
Grease, oil, tar (butter, fats,
salad, dressing, cooking oils,
car grease, motor oils)
Ink
Mildew, scorch
Mud
Mustard, tomato
Nail polish
Paint, varnish
Rust, brown or yellow
discoloration
Shoe polish
Apply ice. Scrape off excess. Place stain face down on paper towels. Saturate with
prewash stain remover or nonflammable dry cleaning fluid.
Use product containing enzymes to pretreat or soak stains.
Pretreat stain. Wash using COLD water and bleach safe for fabric.
Soak the item in a bowl of COLD water for at least 30 minutes. Then launder as usual.
Remove all surface wax. Put the garment in the freezer for a couple of hours, then
remove and break away as much wax as possible. Try a commercial removal product
like Goo-Gone, Goop, or Go-Jo cleaner for the remaining wax stains. DO NOT
ATTEMPT TO REMOVE WITH HEAT!
Pretreat or soak in WARM water using product containing enzymes. Wash using bleach
safe for fabric.
Pretreat with prewash stain remover or rub with bar soap.
Use packaged color remover. Wash using bleach safe for fabric.
Pretreat or soak in WARM water using product containing enzymes. Wash using bleach
safe for fabric.
Scrape residue from fabric. Pretreat. Wash using hottest water safe for fabric. For heavy
stains and tar, apply nonflammable dry cleaning fluid to back of stain. Replace towels
under stain frequently. Rinse throughly. Wash using hottest water safe for fabric.
Some inks may be impossible to remove. Washing may set some inks. Use prewash
stain remover, denatured alcohol, or nonflammable dry cleaning fluid.
Wash with chlorine bleach if safe for fabric. Or, soak in oxygen bleach and HOT water
before washing. Badly mildewed fabrics may be permanently damaged.
Brush off dry mud. Pretreat or soak with product containing enzymes.
Pretreat with prewash stain remover. Wash using bleach safe for fabric.
May be impossible to remove. Place stain face down on paper towels. Apply nail polish
remover to back of stain.
Repeat, replacing paper towels frequently. Do not use on acetate fabrics.
WATER BASED Rinse fabric in cool water while stain is wet. Wash. Once paint is dry, it
cannot be removed,
OIL BASED AND VARNISH Use solvent recommended on can label. Rinse throughly
before washing.
For spots, use rust remover safe for fabric. For discoloration of an entire load, use
phosphate detergent and nonchlorine bleach. Do not use chlorine bleach because it
may intensify discoloration.
LIQUID Pretreat with a paste of powdered detergent and water. Apply paste and scrape
residue from fabric. Pretreat with prewash stain remover or nonflammable dry cleaning
fluid. Rub detergent into dampened area. Wash using bleach safe for fabric.
Stain Removal
STAIN TREATMENT
16
3-3. FUNCTION OF EACH BUTTON
Delayed finishing time.
The time increases when the button is pushed.
The following settings are indicated as the
button is pushed 1 ▶ 2 ▶3 ▶ 4 ▶ ... 19▶
Reservation off ▶ 1 ...
To cancel delay time, turn the power switch
off or push DELAY WASH button until off.
DELAY WASH (Selection)
BUTTON
Select to select Water
(Wash/Rinse) Temperature.
Pressing the button allows
The selection of TAP COLD
▶COLD ▶ECO WARM ▶
WARM▶HOT respectively.
Default setting is Warm.
WASH / TEMP.
Note
The time shown on the display is the estimated cycle time. If the sensors and microprocessor elect to
make changes during the cycle, the display will be adjusted accordingly.
POWER
Power on.
Push again, power goes off
Power goes off automatically after the wash
is finished.
After turning the power on, the unit will
automatically turn off if nothing is selected.
LOAD SENSING
It operates in all cycles.
During being detected by the sensor, the LOAD
SENSING LED flashes.
It automatically sensing the size of the load.
During this step, the washing machine selects an
optimized washing algorithm.
SOIL LEVEL
Allows a selection to be make for the
strength of the wash action.
Power option selections light up in
sequence as follows Normal ▶ Heavy
▶ Light ▶ Normal as the button is
pushed.
This can be selected for any program.
Adjustment can be made while
washing.
Default SOIL LEVEL is Normal.
SPIN SPEED
Spin speed
can be
selected from
No Spin to
Extra high.
Default is
High.
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