LG LDF9932 Installation guide

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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 components 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.
DISCLAIMER
The information in this training manual was accurate at the time of publication. Every effort has been made
to ensure accuracy. Updates, changes, etc. are available via GCSC and LGCSacademy. The information in
this manual is intended for persons with adequate backgrounds in electronics, mechanical, and electronic
servicing. The manufacturer and seller are not to be held responsible for any liability incurred from its use.
COMPLIANCE
The responsible party for this device’s compliance is LG Electronics Alabama, Inc.; 201 James Record Road,
Huntsville, AL, 35813.

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Contents
Important Notices (The Small Print Page) 1
Contents 2
Specifications 4
Warranty 5
Installation 6
Electrical Supply Preparation 7
Water Supply Installation 7
Installation 7
Drain Connection 9
Water Connection 9
Electrical Connection 9
Final Installation 10
Features and Parts 11
Control Panel 12
Disassembly 13
Tub Assembly, Lower Cover, and Insulation 13
Door Assembly 14
Fan Assembly (Drying Fan) 15
Door Spring 15
Door Liner 15
Lower Frame 16
Drain Hose Holder 16
Base Cover 16
Sump Wiring and Hoses 17
Noise Filter 17
Float Switches 17
Base Assembly 18
Steam Generator 18
Front Leg Adjustment 19
Rear Leg Adjustment 19
Inlet Valve 19
Air Breaker Assembly 20
Sump Assembly 20
Hinge Supporter and Door Gasket 23
Rack Support Rails 23
Dual Intensity Spray Wash 24
Adding Detergent 25
Adding Rinse-Aid 26
Program Chart 27
Schematic 28
continued on next page Æ

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Contents, continued
Error Codes 29
Troubleshooting 31
Diagnosis and Repair (Troubleshooting Charts) 33
Test Mode 37
Steam Generator Test Mode 38
Exploded Views 39
Parts List 46
Serial Number Identification 50
Ohm’s Law and Watt’s Law 51
Conversion Information 52
Service Bulletins 53
Changes to Base 53
Drain hose with Siphon Protector 60
Hinge Spring and Connector 63
Change in Vent to Prevent Condensation 65
Ver. 1.4 090827

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SPECIFICATIONS

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WARRANTY

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INSTALLATION
Installation is covered briefly for the servicer who may need to uninstall and reinstall the
dishwasher for repairs. For new installations, please refer to the installation guide that
was supplied with the dishwasher.
•We recommend a location as close to the sink as possible (but not directly under
it) for easy connection to water and drain lines.
•The installation must be within 10’ (3 m) of the sink for proper drainage.
•If the dishwasher is installed in a corner (next to an adjacent wall), there must be
2” (50 mm) clearance.
•The floor under the dishwasher should be at the same level as the rest of the
room so the dishwasher can slide in and out easily for service.
Drill a 1½” hole on either side to allow for
the drain hose, water supply hose, and
electrical cable. The opening must be in an
area within 4” (100 mm) of the back wall
and 4” (100 mm) of the floor.
If there is a floor in the cabinet under the
sink, it will be necessary to cut through it
to connect the water, drain, and electrical
cable under the sink.
The dishwasher must be supplied with
120 VAC, 60 Hz, 1Ø current as indicated
on the rating plate and connected to a
properly fused and grounded dedicated
20-amp circuit.
The wire or water supply can be fed from
either side, or both from the same side,
depending upon source location.
They must be run in the channels under the
dishwasher, as shown in the drawing.

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ELECTRICAL SUPPLY PREPARATION
The dishwasher can be hardwired if necessary and if permitted by local code. We
recommend the use of a dishwasher installation kit, available at most hardware and home
supply stored. This kit includes a cordset, a flexible water supply line, and the elbow
connector necessary to connect it. Using a cordset requires an electric outlet under the
sink accessible when the dishwasher is installed. The cordset makes it easier to
disconnect the dishwasher from power while working on it and makes removal and
replacement easier. As stated earlier, installation requires a properly fused and grounded
dedicated circuit.
WATER SUPPLY PREPARATION
The dishwasher may be connected to either hot or cold water. If the hot water can not
maintained below 149°F, the dishwasher must be connected to the cold water supply.
Lay out the water supply line as indicated on page 6 of this training manual. Use sealing
tape or joint compound to avoid leaks.
INSTALLATION
After sliding the dishwasher into position,
adjust the leveling legs.
The left rear leg can be raised or lowered
by turning the adjusting screw with a
Phillips screwdriver. (This is slightly easier
when the dishwasher is tipped forward
very slightly, just enough to take the
weight off the rear leg.
The right rear leg is adjusted in the same
manner.
(See exploded view, next page.)

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INSTALLATION, continued
Exploded view of the left rear leg adjuster
assembly. (Right rear similar.)
The front legs can be adjusted by using a
¼” drive wrench, as shown.
To complete the installation:
Remove the lower cover.
Make sure the legs are adjusted and the
dishwasher is level.
Lay out the electrical cable, water supply
tube, and drain hose as shown.
Slide the dishwasher carefully back into
place.
Make the appropriate connections, as
directed below.

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DRAIN CONNECTION
The drain hose must be connected in a manner that meets local plumbing codes. If the
end of the drain hose does not fit the available connector, an adapter may be obtained
from a local hardware or plumbing supplier.
The rubber end can be cut off for the
correct size attachment.
This drawing shows the drain line installed
with a rise in the drain pipe but no air gap.
It can also be with an air gap installed. Be
sure to observe the clearances listed.
Most garbage disposers have a
dishwasher drain fitting built in to them.
If your installation does not include a
disposer, you can use a special tailpiece
with a drain attachment available at most
hardware and home supply stores.
WATER CONNECTION
Turn off the water supply and connect the
elbow to the inlet valve.
Connect the flexible supply tube to the
elbow.
Use sealing tape to make all connections.
Make sure the supply line is not kinked.
ELECTRICAL CONNECTION
Use wire
connectors and
replace the cover
on the junction
box.
(12/2 w/ ground,
20-amps)

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FINAL INSTALLATION
1. Turn on the water at the valve under the sink.
2. Turn on the power at the fuse or breaker (or plug in the cordset at the outlet
under the sink.
3. Run the dishwasher through one QUICK cycle to check the operation and to
check for water leaks.
4. Replace the lower cover.
When the door is closed, the top edge with the controls should be under the countertop.
Use the installation brackets to attach the
top of the dishwasher to the bottom of the
countertop, if necessary.
Insert a wood screw into the cabinet
through the hole provided in the side of
the dishwasher. Be sure to remove the
plastic covers first.

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FEATURES and PARTS

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CONTROL PANEL
SOAK Heavily soiled loads, with cooked-on foods
POWER SCRUB Normal soil level, everyday loads
NORMAL Normal soil level, everyday loads
STEAM DELICATE Washing delicate items, crystal, stemware
QUICK Light soil level, recently used dishes and cutlery
RINSE ONLY Rinses only, no washing
OPTIONS
STEAM Adds steam to SOAK, POWER SCRUB, and Normal cycles
RINSE Press to select Sanitary, Extra Rinse, or both
SPRAY Press to cycle through Strong, Medium, or Soft spray
HALF LOAD Press to select either upper or lower rack instead of both
DELAY START Each press delays the start by one hour up to 24 hours
CHILD LOCK Press and hold both buttons to engage or disengage
CANCEL Press and hold STEAM DELICATE and NORMAL
INDICATORS
nSteam option indicator – blinks if selected
oRinse indicator – blinks if selected
pSpray indicator – blinks if selected
q
Half load indicator
r
Child Lock – illuminated when engaged
Rinse Aid – illuminated when refill is required
sTime remaining before cycle ends

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DISASSEMBLY
The following pages will detail the disassembly and reassembly of the dishwasher during
the normal course of diagnosis and repair.
Turn off the electric power at the source (or unplug it if your dishwasher is installed using
a plug and cordset.)
Pull the dishwasher out from under the counter and turn off the water.
TUB ASSEMBLY, LOWER COVER, and INSULATION
Remove the two screws that hold the
lower cover (kick plate) in place.
Disconnect the water inlet hose at the
elbow.
Disconnect the electrical supply at the
junction box if the dishwasher is
hardwired. (Unnecessary if the dishwasher
is installed using a plug and cordset.)
Lift the insulation blanket off the tub of
the dishwasher and preserve it for
replacement at the completion of repairs.

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DOOR ASSEMBLY
Open the door and fold it down.
Remove the screws (12) from the
perimeter of the door. The cover will drop,
so have a blanket or pad on the floor to
prevent damage to it.
Remove the screws (2) at the latchhook.
This will release the control panel and latch
assemblies.
At this point, the control boards, latch
assembly, and main board can be removed
for repair or replacement.

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FAN ASSEMBLY
With the door disassembled as described
on the previous page, remove the screws
(4) securing the door bracket.
Remove the ground screw and ground wire.
Remove the wire connections for the fan
and for the detergent dispenser.
Remove the air duct. Turn the inner cover
counterclockwise to remove it.
Close the door.
Remove the screws (6) and brackets (2)
securing the dispenser.
Pry the dispenser out using a screwdriver.
DOOR SPRING
Close the door.
Lift the spring end upward and off the
hinge bracket.
Watch for sharp edges on the door and
tub.
Do not let the hinge spring release
uncontrolled.
DOOR LINER
Open the door.
Lift the door liner and remove it from the
hinge supporter.

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LOWER FRAME
Remove the screws (4) to remove the
lower frame member.
TURN THE DISHWASHER OVER
While some technicians like to turn the
dishwasher over (180°) to work on it,
many find it is much easier simply to pull it
out from under the counter and lean it
back. This eliminates the mess caused by
spillage when inverting the dishwasher.
DRAIN HOSE HOLDER
The drain hose snaps into place in its
holder where it exits the base of the
dishwasher. You won’t need to remove this
hose from its holder unless you are
replacing the entire hose.
BASE COVER
Remove the screws (2) and remove the
base cover. It may require flexing the cover
slightly to get all the tabs from under their
brackets.

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SUMP WIRING HARNESS and HOSES
Remove all wiring connections.
Check carefully for ground wire
connections (screw and ring connector.)
Remove all hose connections.
Remove the sump holder rings (2) and
screws.
Use a new gasket if you remove or replace
the sump assembly.
NOISE FILTER
The noise filter is attached to the inside of
the base on the right side of the
dishwasher by one screw. Remove the
screw; then, pry the noise filter from its
clips in the base.
FLOAT SWITCHES
The float switches are on the right side of
the dishwasher just above the base.
Remove the wiring connectors before
detaching the float switch assembly,
It is a good idea to mark the switches to be
sure they are reconnected correctly.

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FLOAT SWITCH ASSEMBLY
The float switches can be removed without
removing the assembly from the
dishwasher. This allows replacement of the
electrical switches and / or the part that
holds the switches.
Press the tabs with a driver and lift the top
of the switch assembly away from the
body.
BASE ASSEMBLY
Remove the screws (8) that secure the
base to the dishwasher.
All the wiring connections and hoses
should have been removed already.
Remember, the hoses stay with the sump at
this point.
STEAM GENERATOR
The steam generator is mounted on the
left side of the dishwasher.
Disconnect the wiring to the thermistor,
the low water sensor, and the high water
sensor.
Remove the hose clamps. There are two;
one for the input and one to deliver steam
to the tub.
Remove the screws (2) and lift the steam
generator out of the base.
Be careful, in case the water in it is HOT!

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FRONT LEG ADJUSTMENT
The front adjustment legs can be turned by
pliers or a screwdriver at the bottom, or by
a ¼” drive ratchet from above.
REAR LEG ADJUSTMENT
The rear legs can be adjusted by using a
Phillips screwdriver to turn the adjustment
shaft which raises or lowers the rear leg.
(See pages 7 and 8.)
INLET VALVE
The inlet valve is an electromechanical
double valve that controls water input to
the dishwasher.
Remove the screws (2) that hold the valve
to the base of the dishwasher.
Release the clamps (2) that secure the
hoses to the valve.

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AIR BREAKER ASSEMBLY
Release the clamps (3) that secure the
hoses to the air breaker.
Inside the tub, turn the air breaker vent
counterclockwise. Be careful to avoid
damaging the O-ring seal.
SUMP ASSEMBLY
(NOTE: The dishwasher is turned upside-
down in this drawing.)
After all the wires and hoses are
disconnected from the sump, remove the
screws and sump holders (2), being careful
the sump does not fall into the tub and
cause damage.
If the dishwasher is not turned upside-
down, but tipped up and leaned back, you
can lift the sump out through the tub.
Remove the outer nut and ground wire
from the heater. Then loosen the inner nut
to the end of the shaft to release the
heater.
Remove the screws (3) securing the drain
pump to the sump assembly.