LG LDF6920WW User manual

DISHWASHER
SERVICE MANUAL
BEFORE SERVICING THE UNIT, PLEASE READ THIS MANUAL CAREFULLY
FOR SAFETY AND CORRECT SERVICES.
NOTE
MODEL : LDF6920(WW,BB,ST)

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1. CAUTION......................................................................................................................... 4
2. SPECIFICATIONS ........................................................................................................... 5
3. WIRING DIAGRAM........................................................................................................ 6
4. FEATURES & TECHNICAL EXPLANATION ................................................................... 7
5. PARTS NAME ................................................................................................................ 11
6. PROGRAM CHART ..................................................................................................... 12
7. HOW TO DISASSEMBLE ............................................................................................ 13
8. TROUBLE SHOOTING METHODS.............................................................................. 22
A. TROUBLE SHOOTING ACCORDING TO DISPLAYED ERROR MESSAGE...........22
B. TROUBLE DIAGNOSES AND REPAIR BY SYMPTOM........................................... 24
9. INSTALLATION INSTRUCTION ................................................................................... 28
10. EXPLODED VIEW .......................................................................................................35
CONTENTS

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DISCONNECT POWER CORD BEFORE SERVICING
RECONNECT ALL GROUNDING DEVICES
IMPORTANT SAFETY NOTICE !
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 and 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.
CAUTION !

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2. SPECIFICATION
Rated Voltage / Frequency AC 120V/60Hz
Installation Built-In
Place Settings 16
Product Dimension(in) 23 3/4
x 24 5/8x 33 1/2
Product Weight(lbs) 90lbs
Door Color White, Black, Stainless
Tub Material Stainless Steel
Control Electronic
Rated Power(Watt) 1,350
Heater Power(Watt) 1,200
Programs 5
Upper Rack Position manual
Lower Rack 50% Fold down
Water Consumption 10-26 (Normal)
Power Consumption(kWh/year) 285-310
Operating Time (min) 101-135 (Normal)
Fan Dry System Yes
Delay Start Function Yes
Auto-Off Power Switch Yes
Process Monitor Yes
Wash Level 5
Racks Nylon Coating
Operating Water Pressure (Bar) 20-120 (140-830kPa)
ITEM SPECIFICATION

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6920 serise
3. WIRING DIAGRAM

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4. FEATURES & TECHNICAL EXPLANATION
4-1. Product Features
If you raise the Upper Rack, you can load large dishes in the Lower Rack.
(Max. 14 in.)
The tall tub provides large dishes loading as well as large capacity.
LG dishwashers let you load oversized items in the Lower and Upper Rack.
Newly introduced Slim Direct Inverter motor is inverter-controlled. Speed is
controlled based on program selection. It also offers high energy efficiency to
minimize energy loss.
This is one of the best performance solutions for drying dishes because it
minimizes venting humid air to the outside of the dishwasher. In addition, this
system ensures better drying results compared to the condensing drying
system.
Because of alternating water spray between the Upper and Lower
Rack, the water pressure allows superior performance and reduced
consumption of water and electricity.
For best wash results, the self-cleaning filter system continuously cleans the
water as it circulates. Your LG dishwasher has a self-cleaning filter that grinds
food into small particles before it goes down the drain.
■■Ultra Big Capacity
■■Slim Direct MotorTM
■■Hybrid Drying System
■■Vario Spray System
■■Self Cleaning Filter
Moist
Air
Dry
Air
Mixed
Air
to
Upper
Arm
to
Lower
Arm
Soil Sensor
Fine Mesh
to Drain

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PROGRAM
• Press the program that
corresponds to your
desired wash cycle.
CANCEL
•To cancel a running
program, open the door,
then press and hold the
Power Scrub and
Normal buttons for 3
seconds.
INDICATOR
•Child lock: Lamp will turn on
when Child Lock setting is on.
•Rinse Aid: Refill with Rinse aid
when Lamp turns on.
This program is for very heavily soiled loads
This program is for normally soiled everyday loads.
This program is for washing delicate items like glasses.
This program is for very lightly soiled loads.
This program is to wash some items loaded on the upper rack.
Normal
Rinse Only
Upper Only
Delicate
Power Scrub
Control panel may vary on some models.
4-2. Display Panel LDF 6920 Series

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DELAY START
•If you want to delay the start of
a selected program, press the
Delay Start button.
•Each press of Delay Start will
delay the start of the cycle by
one hour.
•The delay start time can be
adjusted from 1 to 12 hours in
one-hour increment.
POWER
•For operating, press this
button first for power on.
•After operating, the power
automatically switches off
for safety and economy.
•In case of an unusual Power
surge or disturbance, the
power may be automatically
turned off for safety.
CHILD LOCK
•Lock the control buttons
to prevent the settings
from being changed.
•To lock/unlock, press
Delicate and Rinse Only
buttons simultaneously
for 3 seconds with door
open.
SANITARY/
EXTRA RINSE
•Repeated pressing of the
Rinse button will select
Sanitary, Extra Rinse
or both.
•If you select the Sanitary
function, the temperature
of Heating Rinse can
reach 161。F (72℃).
•When you select Extra
Rinse, an additional
rinse cycle is added.

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4-3. TEST MODE LDF 6810/6920 Series
CHECK PROGRAM
BUTTON The number of
pushing button
Top
Display Load and Checking points Door open/ closed
Upper Only +
Time Delay +
POWER
Power Scrub
Normal
Delicate
Rinse Only
Upper Only
Rinse
Time Delay
1 TIME
1 TIME
1 TIME
1 TIME
1 TIME
1 TIME
1 TIME
1 TIME
2 TIME
3 TIME
4 TIME
5 TIME
6 TIME
7 TIME
8 TIME
9 TIME
10 TIME
11 TIME
12 TIME
13 TIME
Soil Level
32
33
Frequency
35
36
37
38
Temp.(*C)
3A
3b
3c
3H/U5
11
22
33
44
55
66
Soil Sensor
Wash Pump
Drain Pump
Inlet Valve
Dispenser
Heater
(for 10 sec)
Fan
Thermistor
Lower Nozzle
(VARIO)
Upper Nozzle
(VARIO)
Wash-Drain-
Water Supply
Auto-Off
Child Lock + Rinse Aid
Sanitary-Extra
Power Scrub +
Normal + Delicate
Rinse Only +
Upper Only
Rinse Aid
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
Both
Both
Both
Both
Both
Both
Both
Both
Both
Both
Closed
Both
Closed
Closed
Closed
Closed
Both
Closed
Closed
Closed
Closed

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5. PARTS NAME
Control Panel
Door Handle
Front Cover
Lower Cover
Leveling Foot
Base
Top Spray Arm
Upper Spray Arm
Lower Spray Arm
Detergent & Rinse Aid Dispenser
Vapor Vent Cover
Upper Rack
Cutlery Basket
Lower Rack
Top Display
Power Button
The appearance and specifications may be varied without notice according to localities.
5-3. LDF 6810 Series
INSTALL BRACKET WOOD SCREW

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6. PROGRAM CHART(SCHEMATIC DIAGRAM)
Program chart
LDF 6920 Series

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BEFORE DISASSEMBLING THE DISHWASHER ;
1) Remove the cord from electric outlet to avoid electric shock.
2) Close the Water Tap (faucet).
3) Remove all dishes and items in the dishwasher.
4) Remove the Lower Rack and the Upper Rack.
5) Remove the inlet hose and drain hose connetion to avoid the hose damages.
6) Prepare some towels to avoid floor wet by the water left in the dishwasher.
7. HOW TO DISASSEMBLE
7-1. FULL DISASSEMBLE
1. Lower Cover and Lower Felt
1) Remove the front 2 screws.
2) Remove the Inlet Hose and Power Supply
Cable.
2. Tub Felt
1) Tub Felt
Lower Cover
Tub Felt

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Control Panel Front Cover
C
ontroller
Controller
Latch Assembly
3-1. Door Assembly
1) Front Cover
Open the door.
Remove 12 screws(stainless).
2) Control Panel Assembly
Remove 2 screws(Stainless).
Remove the wire connections.
Be sure the wiring should not be
changed in reassembling
Remove the Latch assembly.
Remove the Front Display.
Remove 8 screws for Controller.

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Fan Assembly
Inner CoverGasket
Flange
Hose
Detergent
Dispenser
Door Hinge
Air Duct
Door Bracket
H
inge Bracket
H
inge Spring
3) Fan Assembly
Open the door.
Remove 4 screws and a earth screw for
Door Bracket.
Remove the wire connetions.
Remove the Air Duct.
Turn the Inner Cover counterclockwise.
4) Detergent Dispenser
Close the door
Remove the wire connections.
Remove 6 screws with brackets.
Push the Detergent slowly pulling up the
the Flange by Standard Screwdriver.
5) Door Spring (Right & Left)
Push the Spring upwards and take it off
from the Hinge Bracket.
Be careful not to be injured by the
sharpedge of Tub.
Take off the Hinge Link from the Hinge.
6) Door Liner
Open the door.
Pull the Door Liner and take it off from
the Hinge Supporter.
Door Liner Assembly
Hinge Supporter

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Lead Wire Holer Hook
Lead Wire Holer
Lower Frame
Drain Hose
D
rain Hose
H
older
4. Lower Frame
1) Press the holder hook as shown in figure.
2) Remove 4 screws.
6. Drain Hose Holder
1) Press the holder hook as shown in figure.
2) Pull the Drain Hose and remove the Drain
Hose Holder.
5. Put the Dishwasher upside down.

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7. Base Cover
1) Remove 2 screws.
2) Pull the Base Cover out.
8. Harness & Hose Assembly
1) Remove the wiring connections.
2) Remove the Hose connections from
Sump Assembly.
You can see the information of Wiring
Diagram at the back of Lower Cover.
Cabinet Base
Base Cover

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9. Cabinet Base
1) Remove 8 screws.
2) Lift it upward.
Cabinet Base
10. Foot & Nut
1) Pull the Foot twisting
2) Pull the Nut pushing the hook.
Nut
Foot
11. Rear Leg Adjustment System
1) Remove 2 screws.
2) Pull the Holder.
3) Pull the Leg Adjust.
4) Pull the Shaft Assembly.
Holder
Leg Adjust
Shaft Assembly

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Sump Holder
Hook
Sump
Assembly
14. Sump Assembly
Remove 2 screws.
Remove the Sump Holder and push the
Sump Assembly down with pulling aside
Hook.
Be careful not to drop the Sump
Assembly to the bottom.
Inlet Valve
Cabinet Base
Air Braker
Nut
Gasket
Air Braker
Assembly
12. Inlet Valve
1) You can disassemble the lnlet Valve by
removing the 2 screws.
13. Air Braker Assembly
1) Disconnect the 3 hoses assembly.
2) Turn the Air Braker Nut counterclockwise.
Be careful the o-ring should not be lost.

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2) Vario Motor
Remove 2 screws for Vario Motor.
Pull the Vario Motor and Micro S/W.
3) Soil Sensor
Pull the Soil Sensor.
Vario Motor
Micro
S/W
Soil
Sensor
1) Heater & Drain Motor
Pull the Heater out of the Sump after
releasing the nut.
Remove 3 screws.
Drain Pump
Heater

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15. Holder Supporter, Tub Packing
and Hinge Supporter Assembly.
When you reassemble the Sump Assembly, be
careful not to kink, tear and take off the seals.
You must take off Stopper Roller(F117) by –
screwdriver to change the Rail Assembly.
(Stopper Roller could be broken while you are
taking off. So you should be careful not to be
hurt and have extra stopper rollers ready at
servicing at all times)
Rotate the screwdriver, after slide it into the
gap between Stopper Roller and Rail Roller.