LG LDF7810xx, LDF7811xx Service Manual
DISHWASHER
SERVICE MANUAL
NOTE
BEFORE SERVICING THE UNIT, PLEASE READ THIS MANUAL CAREFULLY
FOR SAFETY AND CORRECT SERVICES.
MODEL : LDF7810WW / LDF7810BB / LDF7810ST
MODEL : LDF7811WW / LDF7811BB / LDF7811ST
LDS5811WW / LDS5811BB / LDS5811ST
CONTENTS
1. CAUTION......................................................................................................................... 4
2. SPECIFICATIONS........................................................................................................... 5
3. WIRING DIAGRAM........................................................................................................ 6
4. FEATURES & TECHNICAL EXPLANATION ................................................................... 7
5. PARTS NAME................................................................................................................ 13
6. PROGRAM CHART ..................................................................................................... 15
7. HOW TO DISASSEMBLE ............................................................................................ 16
8. TROUBLE SHOOTING METHODS.............................................................................. 25
A. TROUBLE SHOOTING ACCORDING TO DISPLAYED ERROR MESSAGE.......... 25
B. TROUBLE DIAGNOSES AND REPAIR BY SYMPTOM........................................... 27
9. INSTALLATION INSTRUCTION ................................................................................... 31
10. EXPLODED VIEW .......................................................................................................37
11. REPLACEMENT PART LIST ........................................................................................45
- 3 -
CAUTION !
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.
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2. SPECIFICATION
ITEM
Rated Voltage / Frequency AC 120V/60Hz
Installation Built-In
Place Settings 16
Product Dimension(in) 23 7/8
Product Weight(lbs) 7811/7810 series : 115lbs, 5811 series : 110lbs
Door Color White, Black, Stainless
Tub Material Stainless Steel
Control Electronic
Rated Power(Watt) 1,350
Heater Power(Watt) 1,200
Programs 6
Upper Rack Position Adjustable
Lower Rack 50% Fold down
Water Consumption
SPECIFICATION
〃
x 25〃x 33 7/8
21-30 (Normal)
〃
Power Consumption(kWh/year) 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)
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3. WIRING DIAGRAM
- 6 -
4. FEATURES & TECHNICAL EXPLANATION
Moist
Air
Dry
Air
Mixed
Air
to
Upper
Arm
to
Lower
Arm
4-1. Product Features
■■
Ultra Big Capacity
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.
■■
Slim Direct Inverter Motor
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.
■■
Hybrid Drying System
■■
Vario Spray System
■■
Self Cleaning Filter
Soil Sensor
to Drain
Fine Mesh
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.
- 7 -
4-2. Display Panel
4-2-1. LDF 7811/7810 Series
Control panel may vary on some models.
INDICATOR
• Child lock: Lamp will turn on
when
Child Lock setting is on.
• Rinse Aid: Refill with Rinse aid
when Lamp turns on.
PROGRAM
• Press the program that
corresponds to your
desired wash cycle.
Soak
Power Scrub
Normal
Delicate
Quick Wash
Rinse Only
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.
- 8 -
CANCEL
• To cancel a running
program, open the door,
then press and hold the
Normal and Delicate
buttons for 3 seconds.
SPRAY
(INTENSITY)
DELAY START
POWER
• Repeated pressing of the
Spray button will select
Strong, Medium or
Soft.
• 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.
• 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
function, the temperature
of Heating Rinse can
reach 161。F (72℃).
• When you select
Rinse, an additional
rinse cycle is added.
Sanitary
Extra
- 9 -
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
the dishwasher runs normally,
i.e, operation of upper and
lower spray arm alternating
periodically.
Half Load,
Strong
Medium
Soft
Spray Rinse
Half Load
Sanitary
Extra
Rinse
Upper
Lower
4-2-2. LDF 5811 Series
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。F (72℃).
• When you select
Rinse, an additional
rinse cycle is added.
- 10 -
Extra
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.
Soak
Power
Scrub
Quick
Wash
Rinse
Only
Normal
Cancel
Delicate Power
Delay Start
INDICATOR
PROCESSING
INDICATOR
TIME LEFT
• Child lock: Lamp will turn
on when
Child Lock
setting is on.
• Rinse Aid: Refill with
Rinse aid when Lamp turns
on.
• Current program
phase is indicated.
• 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.
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.
CANCEL
• To cancel a
running program,
press and hold
the
Normal and
Delicate buttons
for 3 seconds.
- 11 -
PROGRAM
• Press the
program that
corresponds to
your desired
wash cycle.
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.
4.3 TEST MODE
CHECK PROGRAM
BUTTON
Rinse + Time Delay +
POWER S/W
Soak
Power Scrub
Normal
Delicate
Quick Wash
Rinse Only
Supply
Rinse
Half Load
Time Delay
The number of
pushing button
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
Top
Display
11
22
33
44
55
66
77
88
99
31
32
33
34
35
36
37
38
39
3A
3b
3c
Front Display
n : 3H/U:023H/U2
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
Load and Checking points
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
Soil Sensor
Wash Pump
Delay Start
Child Lock + Rinse
Drain Pump
Inlet Valve
Rinse
Dispenser
Heater
(for 10 sec)
Fan
Wash-Rinse-Dry
Strong-Soft
Sanitary-Extra
Thermistor
Lower Nozzle
(VARIO)
Upper Nozzle
Upper-Lower
Soak-Normal
Delicate-Rinse
(VARIO)
Wash-Drain-
Water Supply
Rinse Aid
Auto-Off
Aid
Wash
Dry
Only
Door open/
closed
Both
Both
Both
Both
Both
Both
Both
Both
Both
Both
Closed
Closed
Both
Closed
Closed
Closed
Both
Closed
Closed
Closed
Closed
Normal Water Level : 315
Pure Water : more than 229
Supply water before operating the Test Mode.
- 12 -
5. PARTS NAME
5-1. LDF 7811/7810 Series
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
INSTALL BRACKET WOOD SCREW
The appearance and specifications may be varied without notice according to localities.
- 13 -
4-2. LDF 5811 Series
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
INSTALL BRACKET WOOD SCREW
The appearance and specifications may be varied without notice according to localities.
- 14 -
6. PROGRAM CHART(SCHEMATIC DIAGRAM)
W/Motor
Drain Pump
Inlet Valve
Heater
Vario Motor
Fan Motor
Dispenser
Thermal Act
Auto Off S/W
Rinse Only
Quick
Fine China
NORMAL
10 10
61
60 65
49 68
46 60
22 10 26
86 20
10
30 8 30 3 30
30
20
10 10 10 30
10 20
30
Power Scrub
Soak
49 65
18 10 10 38 10 10 26
63 68
72
30
26 10 10 46 10 10 30
30
Drain
Stop
Water Supply
Wash
Stop
Drain
Wash
Drain
Wash
Drain
Water Supply
Drain
Water Supply
Wash
Stop
Drain
Wash
Drain
Wash
Drain
Water Supply
Drain
Water Supply
Wash
Stop
Drain
Wash
Drain
Wash
Drain
Water Supply
Drain
Water Supply
Wash
Stop
Drain
Wash
Drain
Wash
Drain
Water Supply
Drain
Water Supply
Rinse
Stop
Drain
Wash
Drain
Water Supply
Drain
Water Supply
Rinse
Stop
Drain
Wash
Drain
Water Supply
Drain
Water Supply
Heating A
Heating B
Stop
Drain
Stop
Drain
Dry
Drain
Program
Drain A
Drain B Drain B
Drain B Drain B Drain C
Drain C
Drain D
Pre Wash 1 Pre Wash 2 Pre Wash 3
Wash
Program chart
Main Wash
Rinse 1 Rinse 2 Heating Rinse Dry
Rinse
Dry
- 15 -
7. HOW TO DISASSEMBLE
Lower Felt
Lower Cover
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.
7-1. 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.
Cabinet-L
Tub Felt
Cabinet-R
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.
Tub Felt
3)
- 16 -
Control Panel Front Cover
F
3-1. Door Assembly
(LDF7811/7810 Series)
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.
Controller
ront Display
Latch Assembly
Controller
- 17 -
Control Panel Front Cover
3-2. Door Assembly
(LDF 5811 Series)
1) Front Cover
Open the door.
Remove 6 screws(Stainless).
2) Control Panel Assembly
Remove 8 screws(Stainless).
Remove the wire connections.
Be sure the wiring should not be
changed in reassembling
Remove the Latch assembly.
Remove 8 screws for Controller.
Controller
Latch Assembly
Controller
- 18 -
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