LG LDF7810, LDF6811, LDS5811 Schematic

DISHWASHER

SERVICE MANUAL

BEFORE SERVICING THE UNIT, PLEASE READ THIS MANUAL CAREFULLY
FOR SAFETY AND CORRECT SERVICES.

NOTE

MODEL : LDF6810WW / LDF6810BB / LDF6810ST

MODEL : LDF7810WW / LDF7810BB / LDF7810ST
MODEL : LDF7811WW / LDF7811BB / LDF7811ST

LDS5811WW / LDS5811BB / LDS5811ST

- 3 -

1. CAUTION......................................................................................................................... 4

2. SPECIFICATIONS........................................................................................................... 5

3. WIRING DIAGRAM........................................................................................................ 6

4. FEATURES & TECHNICAL EXPLANATION ................................................................... 7

5. PARTS NAME................................................................................................................ 16

6. PROGRAM CHART ..................................................................................................... 19

7. HOW TO DISASSEMBLE ............................................................................................ 21

8. TROUBLE SHOOTING METHODS.............................................................................. 30

A. TROUBLE SHOOTING ACCORDING TO DISPLAYED ERROR MESSAGE...........30

B. TROUBLE DIAGNOSES AND REPAIR BY SYMPTOM........................................... 32

9. INSTALLATION INSTRUCTION ................................................................................... 36

10. EXPLODED VIEW .......................................................................................................43

11. REPLACEMENT PART LIST ........................................................................................52

CONTENTS

- 4 -

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 !

- 5 -

2. SPECIFICATION

Rated Voltage / Frequency AC 120V/60Hz
Installation Built-In
Place Settings 16
Product Dimension(in) 23 7/8

x 25 x 33 7/8
Product Weight(lbs) 7811/7810 series : 115lbs, 5811/ 6810 series : 110lbs
Door Color White, Black, Stainless
Tub Material Stainless Steel
Control Electronic
Rated Power(Watt) 1,350
Heater Power(Watt) 1,200
Programs 7811/7810 series : 6, 6810 series : 5
Upper Rack Position 7811/7810 series : Adjustable, 5811/6810 series : manual
Lower Rack 50% Fold down
Water Consumption

21-30 (Normal)
Power Consumption(kWh/year) 352~370
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

- 6 -

3. WIRING DIAGRAM

- 7 -

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 Inverter Motor

Hybrid Drying System

Vario Spray System

Self Cleaning Filter

Moist

Air

Dry

Air

Mixed

Air

to
Upper
Arm

to
Lower
Arm

Soil Sensor

to Drain

Fine Mesh

- 8 -

4-2. Display Panel

4-2-1. LDF 7811/7810 Series

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
Normal and Delicate
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 including pots,
pans and casserole dishes which may have dry food residue.

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 that quick wash of lightly soiled recently
used dishes and cutlery.

This program is for very lightly soiled loads.

Soak

Normal

Quick Wash

Rinse Only

Delicate

Power Scrub

Control panel may vary on some models.

- 9 -

SPRAY

(INTENSITY)

• Repeated pressing of the
Spray button will select

Strong, Medium or
Soft.

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 24 hours in
one-hour increment.

HALF LOAD

• In case of a small load, use the
upper or lower rack only to save
energy.

• Each press of the

Half Load

button cycles between upper
rack only and lower rack only.

• If you don't press Half Load,
the dishwasher runs normally,
i.e, operation of upper and
lower spray arm alternating
periodically.

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
Spray and Rinse
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 (72 ).

• When you select

Extra

Rinse, an additional

rinse cycle is added.

- 10 -

SPRAY

(INTENSITY)

• Repeated pressing of the
Spray button will select

Strong, Medium or
Soft.

CHILD LOCK

• Lock the control buttons
to prevent the settings
from being changed.

• To lock/unlock, press
Spray and Rinse buttons
simultaneously for 3
seconds.

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 (72 ).

• When you select

Extra

Rinse, an additional

rinse cycle is added.

HALF LOAD

• In case of a small load, use the
upper or lower rack only to save
energy.

• Each press of the

Half Load

button cycles between upper
rack only and lower rack only.

• If you don't press Half Load,
the dishwasher runs normally,
i.e, operation of upper and
lower spray arm alternating
periodically.

4-2-2. LDF 5811 Series

- 11 -

INDICATOR

• Child lock: Lamp will turn
on when

Child Lock

setting is on.

• Rinse Aid: Refill with
Rinse aid when Lamp turns
on.

PROCESSING

INDICATOR

• Current program
phase is indicated.

TIME LEFT

• Before starting, the display window shows
the running time of the selected program.

• After starting, the display window shows
the remaining time.

• If the dishwasher has a trouble, the trouble
type is displayed.

PROGRAM

• Press the
program that
corresponds to
your desired
wash cycle.

CANCEL

• To cancel a
running program,
press and hold
the Normal and
Delicate buttons
for 3 seconds.

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.

- 12 -

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.

4-2-3. LDF 6810 Series

- 13 -

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

(72 ).

• When you select

Extra

Rinse, an additional

rinse cycle is added.

4-3. TEST MODE

4-3-1. LDF 7811/7810 LDS 5811 Series

CHECK PROGRAM

BUTTON

The number of
pushing button

Front Display

Top

Display

Load and Checking points

Door open/

closed

Rinse + Time Delay +
POWER S/W

Soak
Power Scrub
Normal
Delicate
Quick Wash
Rinse Only
Supply
Rinse
Half Load

Time Delay

Normal Water Level : 315
Pure Water : more than 229

1 TIME
1 TIME

1 TIME
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

31
32
33

34
35

36
37

38
39

3A

3b

3c

n : 3H/U:023H/U2

11
22
33
44
55
66
77
88
99

1 : 11
2 : 22
3 : 33
4 : 44
5 : 55
6 : 66
7 : 77
8 : 88
9 : 99

Soil Level

n : 02
n : 03

Frequency

n : 05
n : 06
n : 07

n : 08

Temp. (

)

n : 0A

n : 0b

n : 0c

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

Delay Start

Child Lock +

Rinse Aid

Wash
Rinse

Dry

Wash-Rinse-Dry

Strong-Soft

Sanitary-Extra

Upper-Lower
Soak-Normal

Delicate-Rinse

Only

Rinse Aid

All LEDs are lighting Both
All LEDs are lighting

All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting

Strong/Medium/Soft

Sanitary-Extra Rinse

Upper-Lower

Both
Both
Both
Both
Both
Both
Both
Both
Both

Both
Closed
Closed

Both
Closed

Closed
Closed

Both
Closed

Closed

Closed
Closed

Supply water before operating the Test Mode.

- 14 -

Normal Water Level : 295

- 15 -

4-3-2. LDF 6810 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

31
32
33

34
35

36
37

38
39

3A

3b

3c

3H/U2

11
22
33
44
55

66

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

- 16 -

5. PARTS NAME

Control Panel
Front Display
Door Handle
Front Cover
Lower Cover
Leveling Foot
Side Cabinet
Base
Top Spray Arm
Upper Spray Arm

Removable Tines
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.

INSTALL BRACKET WOOD SCREW

5-1. LDF 7811/7810 Series

- 17 -

Control Panel

Front Display

Door Handle

Power Button

Front Cover

Lower Cover

Leveling Foot

Side Cabinet

Base

Top Spray Arm
Upper Spray Arm
Removable Tines
Lower Spray Arm
Detergent & Rinse Aid Dispenser
Vapor Vent Cover
Upper Rack
Cutlery Basket
Lower Rack

The appearance and specifications may be varied without notice according to localities.

INSTALL BRACKET WOOD SCREW

5-2. LDF 5811 Series

- 18 -

Control Panel
Door Handle
Front Cover
Lower Cover
Leveling Foot
Side Cabinet
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.

INSTALL BRACKET WOOD SCREW

5-3. LDF 6810 Series

- 19 -

6. PROGRAM CHART(SCHEMATIC DIAGRAM)

Drain A

26 10 10 46 10 10 303049 65 72

18 10 10 38 10 10 26

30

63 68

10 10 10 30 10 20

30

60 65

10 10

61

22 10 263049 68

86 20

20

46 60

10

30 8 30 3 30

W/Motor

Drain Pump

Inlet Valve

Heater

Vario Motor

Fan Motor

Dispenser

Thermal Act

Auto Off S/W

Program chart

Rinse

Dry

Main Wash

Wash

Rinse 1 Rinse 2 Heating Rinse Dry

Program

Wash

Wash

Wash

Rinse

Stop

Stop

Stop

Wash

Wash

Wash

Wash

Wash

Water Supply

Water Supply

Water Supply

Water Supply

Water Supply

Water Supply

Water Supply

Water Supply

Wash

Drain

Drain

Drain

Drain

Drain

Heating A
Heating B

Dry

Drain D

Drain

Drain

Drain

Stop

Stop

Drain

Drain

Water Supply

Water Supply

Stop

Drain C

Drain

Water Supply

Water Supply

Rinse

Drain

Drain

Drain

Drain

Drain

Drain

Drain

Drain

Drain

Drain B Drain B Drain C

Drain

Drain

Drain

Stop

Drain

Drain

Stop

Pre Wash 1 Pre Wash 2 Pre Wash 3

Drain B Drain B

Wash

Wash

Wash

Wash

Drain

Stop

Water Supply

Wash

Power Scrub

Soak

Rinse Only

Quick

Delicate

NORMAL

6-1. LDF 7811/7810 LDS 5811 Series

- 20 -

Drain A

18 10 10 38 10 10 26

30

63 68

10 10 10 30 10 20

30

60 65

10 10

61

22 10 263049 68

86 20

20

46 60

10

30 8 30 3 30

W/Motor

Drain Pump

Inlet Valve

Heater

Vario Motor

Fan Motor

Dispenser

Thermal Act

Auto Off S/W

Program chart

Rinse

Dry

Main Wash

Wash

Rinse 1 Rinse 2 Heating Rinse Dry

Program

Wash

Wash

Wash

Rinse

Stop

Stop

Stop

Wash

Wash

Wash

Wash

Wash

Water Supply

Water Supply

Water Supply

Water Supply

Water Supply

Water Supply

Water Supply

Water Supply

Wash

Drain

Drain

Drain

Drain

Drain

Heating A
Heating B

Dry

Drain D

Drain

Drain

Drain

Stop

Stop

Drain

Drain

Water Supply

Water Supply

Stop

Drain C

Drain

Water Supply

Water Supply

Rinse

Drain

Drain

Drain

Drain

Drain

Drain

Drain

Drain

Drain

Drain B Drain B Drain C

Drain

Drain

Drain

Stop

Drain

Drain

Stop

Pre Wash 1 Pre Wash 2 Pre Wash 3

Drain B Drain B

Wash

Wash

Wash

Wash

Drain
Stop

Water Supply

Wash

Power Scrub

Rinse Only

Quick

Delicate

NORMAL

6-2. LDF 6810 Series

- 21 -

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) Pull the Felt.

3) Remove the Inlet Hose and Power Supply
Cable.

2. Cabinet and Tub Felt

1) Cabinet-R

Remove front 2 screws.
Remove rear 3 screws.

2)

Cabinet-L

Remove front 2 screws.
Remove rear 3 screws.

3)

Tub Felt

Lower Felt

Lower Cover

Cabinet-L

Tub Felt

Cabinet-R