LG WM2688H*M Installation guide

www.LGEservice.com
DISCOVERY WASHER
TRAINING MANUAL
CAUTION!
READ THIS MANUAL CAREFULLY
BEFORE DIAGNOSING OR SERVICING THIS PRODUCT.

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Published March 2006 by LG Technical Support and Training

PRODUCT PARTS LIST
IMPORTANT SAFETY NOTICE
The information in this training manual is intended for use by persons possessing an adequate background
in electrical equipment, electronic devices, and mechanical systems. In any attempt to repair a major
appliance, personal injury and property damage can result. The manufacturer or seller maintains no liability
for the interpretation of this information, nor can it assume any liability in conjunction with its use. When
servicing this product, under no circumstances should the original design be modified or altered without
permission from LG Electronics. Unauthorized modifications will not only void the warranty, but may lead to
property damage or user injury. If wires, screws, clips, straps, nuts, or washers used to complete a ground
path are removed for service, they must be returned to their original positions and properly fastened.
CAUTION
To avoid personal injury, disconnect the power before servicing this product. If electrical power is required
for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks.
Also be aware that many household appliances present a weight hazard. At least two people should be
involved in the installation or servicing of such devices. Failure to consider the weight of an appliance could
result in physical injury.
ESD NOTICE
Some of the electronic in appliances are electrostatic discharge (ESD) sensitive. ESD can weaken or
damage the electronics in these appliances in a manner that renders them inoperative or reduces the time
until their next failure. Connect an ESD wrist strap to a ground connection point or unpainted metal in the
appliance. Alternatively, you can touch your finger repeatedly to a ground connection point or unpainted
metal in the appliance. Before removing a replacement part from its package, touch the anti-static bag to a
ground connection point or unpainted metal in the appliance. Handle the electronic control assembly by its
edges only. When repackaging a failed electronic control assembly in an anti-static bag, observe these
same precautions.
REGULATORY INFORMATION
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a residential installation. This equipment generates, uses,
and can radiate radio frequency energy, and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate
the receiving antenna; Increase the separation between the equipment and the receiver; Connect the
equipment to an outlet on a different circuit than that to which the receiver is connected; or consult the
dealer or an experienced radio/TV technician for help.
COMPLIANCE
The responsible party for this device’s compliance is LG Electronics Alabama, Inc.; 201 James Record Road,
Huntsville, AL, 35824.
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WM2688H*M Steam Washer
WM2688H*M (Discovery Steam Washer)
Contact Information 2
Safety Notices and Warnings 3
Contents 4
Introduction 8
Specifications 8
Features 9
Serial Number Identification 11
Fuzzy Logic 12
Door Lock 12
Door Locked Lamp 12
Water Circulation 13
Parts Identification (Callout) 14
Accessories 15
Remote Monitor and Modem 16
Installation 17
Connections 18
Control Panel 19
Option Buttons 20
Program Chart 21
Before Performing Service 21
Detergent Dispenser 22
Direct Drive DC Motor 24
Hall Effect Sensor 25
Test Mode and Chart 26
Checking the Water Level Frequency 26
Error Display 27
Diagnosis and Check List (Abnormal Operation) 29
Fault Diagnosis and Troubleshooting 32
No Power 32
Vibration and Spin Noise 33
No Water Supply 34
Detergent Does Not Flow In 34
Liquid Detergent Does Not Flow In 35
Abnormal Sound 35
Heating Without Water 36
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Fault Diagnosis and Troubleshooting (Continued)
Drain Malfunction 36
Wash Heater Trouble 37
Heating Continuously Above The Set Temperature 37
Will not Circulate Water 38
Spin Trouble 39
dE Error Code 39
Disassembly and Repair 40
Block Wiring Diagram 41
Control Panel 41
Main Board 42
Dispenser 43
Noise Filter 43
Front Cabinet Cover 44
Door 46
Door Switch 46
Pump 47
Heater 48
Thermistor 48
Foreign Object Between Drum and Tub 49
Interior Light 49
Motor 50
Tub and Drum 51
Damper 52
Turbo Steam Generator (TSG) 53
Tips and Tricks 55
Exploded Views 56
Exploded View (Cabinet and Control Panel) 56
Exploded View (Drum and Tub) 57
Exploded View (Dispenser) 58
Parts List 59
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WM2688H*M Steam Washer
INTRODUCTION
The DISCOVERY series of washers and dryers is the top of the line and includes
every option and feature. Most notable are the steam generator and the LCD
display.
SPECIFICATIONS
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WM2688H*M Steam Washer
FEATURES
LARGE CAPACITY
The larger drum (4.0 cu. ft.) allows washing of
larger (heavier) loads and oversized items
(comforters, curtains, blankets, etc.) There is less
wrinkling and tangling of the laundry.
DIRECT DRIVE
The brushless DC motor drives the drum directly
without belts, pulleys, or transmissions. The
maximum spin speed of 1,320 RPM extracts more
water from the laundry, reducing drying times.
TILTED DRUM/LARGE DOOR
The tilted drum (10°) and large door opening allow
easier loading and unloading.
STEAM WASHING/SteamFresh®
The steam feature works with the recirculating
pump to increase washing performance while
maintaining low energy and water usage.
SteamFresh®removes wrinkles from dry clothes.
ROLLER JETS and BALLS
The baffles pick up water as the drum turns and
allow it to pour through the clothing as it tumbles.
The balls enhance the washing performance while
maintaining fabric care.
AUTOMATIC LOAD DETECTION
The microprocessor reads the current required to
turn the drum and determines the weight of the
load. This input is used to make numerous
decisions during the wash cycle.
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WM2688H*M Steam Washer
FEATURES, continued
BUILT-IN HEATER
The internal heater helps maintain the water at
its optimal temperature for selected cycles. The
SANITARY cycle kills most common germs and
bacteria.
CHILD LOCK
This allows the user to lock the controls. Children
then cannot play with the buttons and disturb the
wash cycle.
REMOTE LAUNDRY MONITOR
Available separately, the remote monitor displays
the cycle and remaining time of the washer and
dryer. It can be plugged in to any outlet in the
house.
LCD Display
The bright display
replaces numerous
LEDs and shows
instructions when the
controls are set.
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WM2688H*M Steam Washer
SERIAL NUMBER IDENTIFICATION
The serial number is unique to each product. It gives information concerning the
time and place of manufacture. The serial number is required to be paid for
warranty service and to get the correct part in the event a running production
change was made. Some models may have four (4) letters instead of two (2) for
the product code number. The third and fourth letters are significant only to the
manufacturing facility.
This chart will help you decode the serial number.
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WM2688H*M Steam Washer
FUZZY LOGIC
To get the best washing performance, the user selects one of the standard
cycles. Sensors in the COMBO make an infinitely variable number of
adjustments as the cycle progresses. Adjustments are automatically made
for load size, incoming water temperature, soil level, rinses required, and
other variables.
DOOR LOCK
The door has an automatic, electrically operated lock system. When the machine
is off or paused, the door can be opened by pulling it. When the machine is
operating, the electric latch keeps the door closed.
The door cannot be opened:
•When the COMBO is operating
•When the power failed or the washer is unplugged
(until the capacitor discharges and releases the lock)
•When the DOOR LOCK light is on
•When the drum is still turning
DOOR LOCKED LAMP
The DOOR LOCK lamp lights:
•When the COMBO is operating
•When the water level sensor frequency is lower than 22.9 kHz
•When the temperature inside the tub is over 45° C (113°F)
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WM2688H*M Steam Washer
WATER CIRCULATION
The recirculation pump circulates the water during most of the cycle. During the
WASH cycle, it runs continuously for the first 3 minutes and then intermittently
throughout the cycle. During the RINSE cycle, it runs continuously as soon as the
appropriate amount of rinse water has been added. This recirculated water
enters the drum at the top of the door at a small shower head. This spray not
only keeps the window and gasket clean, it allows the clothes to be soaked with
detergent or rinse water more quickly and can be used to control an oversudsing
event.
The recirculation pump is separate
from the drain pump, but they are
attached to opposite sides of the
filter housing.
The steam is not pumped; it comes
into the washer drum under its own
pressure. When steam or the
sanitary cycle is used, the door will
remain locked until the laundry has
cooled to a safe temperature.
The pumps and filter are located at
the bottom left front corner. The filter
can be unscrewed, cleaned, and
replaced.
Use the small drain hose to
evacuate the water remaining in the
bottom of the tub before removing
the filter.
The drain pump is on the left and
exhausts the water via the gray
corrugated hose.
The recirculating pump is on the
right and recirculates water from the
tub to the shower spray at the top of
the door gasket via the smaller black
hose.
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WM2688H*M Steam Washer
PARTS IDENTIFICATION
(Front of Washer)
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WM2688H*M Steam Washer
The air vent on the back of the machine must be left open and clear at all times.
If the washer is installed in a closet or closed laundry alcove, there must be
sufficient clearance and ventilation. The closet should have a full louvered door
with at least 800 square inches (0.5 m2) of open area for ventilation.
The washer requires a space of at least 1 inch (2.5 cm) between the wall and the
machine on each side and at least 4 inches (10 cm) between the back of the
washer and the wall. Additional space may be needed for servicing.
ACCESSORIES
The washer comes with the two input hoses. The blue stripe is for cold water and
the red stripe is for hot water. While the hoses are mechanically identical, it is
critical to the performance of the washer to have the hot and cold hoses
connected correctly.
The wrench is used to remove (and replace) the shipping bolts and to adjust the
leveling feet. Be sure to leave it and encourage the customer to retain the wrench,
the four shipping bolts, and the manual in a safe place in the event the washer
requires service or the customer moves.
The shipping bolts MUST BE REMOVED before operating the washer. (See
page 15.)
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WM2688H*M Steam Washer
REMOTE MONITOR and MODEM
The remote laundry monitor (RLM)
allows the user to monitor the
progress of both washer and dryer,
provided they are quipped with a
modem.
Remove the cover and install the
modem on the back of the washer.
Save the small socket cover and
screws in the event you need to
remove the modem for some reason.
The socket should be covered at all
times.
Remove the cover and install the
modem on the back of the dryer.
Save the small socket cover and
screws in the event you need to
remove the modem for some reason.
The socket should be covered at all
times.
After installation is complete, plug in
the washer, dryer, and monitor, in that
order. Turn on the washer and dryer.
Press and hold the SET button on the
monitor.
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WM2688H*M Steam Washer
INSTALLATION
REMOVE THE SHIPPING BOLTS.
INSTALL THE WASHER ON A FIRM, FLAT SURFACE.
ADJUST THE FEET TO BE LEVEL.
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WM2688H*M Steam Washer
CONNECTIONS
WATER
Be sure the rubber washer is inside the hose end. Attach the hoses to the
washer (red is HOT, blue is COLD). Tighten them firmly but don’t strip the plastic
threads on the washer connections.
DRAIN
The drain pipe should be firmly attached to the standpipe or the laundry tub or
sink where it drains. The pump has sufficient power to cause the pipe to move
around when the water is expelled. The pump can lift the drain water a maximum
of 96 inches (2.4 m), but there is no minimum height requirement. The vacuum
breaker in the drain line will prevent drainage by gravity or siphoning. The hose
can lay flat into a floor drain as long as the end of it is not submerged.
ELECTRICAL
The steam washer requires a 120 VAC, 60 Hz., dedicated, 20-amp circuit.
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WM2688H*M Steam Washer
CONTROL PANEL
The control panel is locates on the front of the Steam Washer. All options are
available from the control panel.
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WM2688H*M Steam Washer
OPTION BUTTONS
PRE-WASH Press to add a pre-wash cycle.
* Child Lock (Press and hold to select or deselect
the Child Lock function)
RINSE+SPIN Press after power-up without selecting
*Drum Light a cycle to rinse and spin ONLY,
without washing!
(Press and hold to turn the drum light
on while the washer is operating.)
EXTRA RINSE Press to add an extra rinse cycle.
*Tub Clean (Press and hold to run a tub cleaning
cycle. The washer must be empty!)
STAIN CYCLE Press to add additional washing time.
WATER PLUS Press to add extra water to the
*Language wash and rinse cycles.
(Press this button with the washer
OFF and then press POWER to
access the language menu.)
To select the optional feature, follow the instructions in
parentheses.
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WM2688H*M Steam Washer
PROGRAM CHART
This chart shows the components and their times of operation in the various
wash cycles. The time estimates shown here are for the basic cycles before the
fuzzy logic adjustments are made.
BEFORE PERFORMING SERVICE
•Be careful to avoid electric shock when disconnecting parts for
troubleshooting.
•Most terminals in the steam washer have 120 VAC or DC on them,
sometimes even when the washer is off.
•The steam generator operates at a high temperature. Be careful when
servicing it. It can be drained in place by removing the drain cap, but have
a hose or a big towel ready to soak up the spillage.
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WM2688H*M Steam Washer
DISPENSER
The dispenser drawer is a multi-chambered reservoir that allows the user to add
all the appropriate laundry additives before starting the cycle. It has a place for
pre-wash detergent, main wash detergent, fabric softener, and bleach. Powdered
or liquid detergents may be used, but softener and bleach must be liquids.
Detergents should carry the HE designation. Do not use regular detergents in the
washer or oversudsing will occur.
The top of the dispenser box is shown here.
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