LG LD-1426T User manual

DISHWASHER
SERVICE MANUAL
BEFORE SERVICING THE UNIT, PLEASE READ THIS MANUAL CAREFULLY
FOR SAFETY AND CORRECT SERVICES.
NOTE
Model : LD-1426T
LD-1416T
LD-1415M
LD-1403W
LD-1204W/LD-1204M
Website : http://www.LGEservice.com
http://blz.lgservice.com
E-mail : http://LGEservice.com/techsup.html

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1. CAUTION......................................................................................................................... 4
2. SPECIFICATIONS ........................................................................................................... 5
3. PARTS NAME.................................................................................................................. 6
4. FEATURES & TECHNICAL EXPLANATION ................................................................... 7
5. WIRING DIAGRAM...................................................................................................... 17
6. PROGRAM CHART (SCHEMATIC DIAGRAM)............................................................ 19
7. HOW TO DISASSEMBLE ............................................................................................ 24
8. TROUBLE SHOOTING METHODS.............................................................................. 35
A. TROUBLE SHOOTING ACCORDING TO DISPLAYED ERROR MESSAGE.......... 35
B. TROUBLE DIAGNOSES AND REPAIR BY SYMPTOM........................................... 37
9. INSTALLATION INSTRUCTION ................................................................................... 41
10. EXPLODED VIEW .......................................................................................................45
11. REPLACEMENT PART LIST ........................................................................................60
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
ITEM
Model
Rated Voltage / Frequency
Installation
Place Settings
Product Dimension(mm)
Product Weight(Kg)
Door Color
Tub Material
Control
Rated Power(Watt)
Heater Power(Watt)
Programs
Racks
Power Consumption (kWh)
Water Consumption
Operating Time (min)
Fan Dry System
Delay Start Function
Auto-Off Power Switch
Process Monitor
Wash Level
Operating Water Pressure (Bar)
Lower Rack
Upper Rack Position
LD-1426T LD-1416T
AC 240V/50Hz
Free Standing
Stainless Steel
Electronic
2210
2100
Nylon Coating
Yes
Yes
Yes
Yes
5
0.5~8
600(W) 600(D) 850(H)
52
LD-1415M LD-1403W LD-1204W/M
SPECIFICATION
14
56
Stainless
Steel
Adjustable Siding
Adjustable
50% Fold down
Removal Rack 50% Fold down 100% Fold down 50% Fold down
Stainless
Steel Titanium White White / Titanium
14 14 14 12
65567
1.05 1.05 1.05 0.7 0.7
20
(Eco+Rinse) 20 (Eco) 20 (Eco) 18 (Eco+Rinse) 20 (Eco)
116
(Except drying)
145
(Except drying)
145
(Except drying)
84 84

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3. PARTS NAME
1. Control Panel
2. Door Handle(with Handle Deco)
3. Front Cover
4. Lower Cover
5. Process Monitor
6. Power Switch
7. Drain Hose
8. Inlet Valve(or Aqua Stop)
9. Power Cord
10. Adjust Leg
11. Upper Rack
12. Cutlery Basket
13. Detergent & Rinse Aid Dispenser
14. Vapor Vent Cover
15. Upper Spray Arm
16. Lower Spray Arm
17. Filter ASM
18. Lower Rack
The appearance and specifications may vary without notice.
LD-1426T LD-1416T/1415M
LD-1403W/1204W/1204M
LD-1403W/1204W/1204M
The racks are different each other by model
Inlet Hose

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4. FEATURES & TECHNICAL EXPLANATION
Over 77 ~80
4-1 New Technology Introduction
• During the high temp. Rinse course, water
temperature in a dishwasher reaches ◉,
considerably higher than the average rinse
temperature in conventional
dishwashers(65°C). This is how Rinse course
can eliminate some bacteria such as
salmonella.
4-1-1. High Temperature Rinsing (Extra Hot function)
• Turbo Spray System is elaborately designed to
achieve a more powerful and efficient wash.
You can see the excellent 3 rotating spray arm
with 5 directional waterjet.
4-1-2. Turbo Spray System
Extra Hot
Temperature Model
77°C
80°C
LD-1426T
LD-1403W
LD-1204W/M
LD-1416T
LD-1415M

4-2 Display Panel
4-2-1. LD-1426T
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PROGRAM
• When you want to
select program, press
each button.
BEEP ON / OFF
• The dishwasher must be switched
off.
• The beep on/off function can be
set by pressing the Half Load and
Power button simultaneously for
seconds, then a “on” will appear
in the time display.
• To change the setting, press the
Half Load button.
• The beep on/off function is
automatically canceled when
power failure occur.
CHILD
LOCK
• Used to lock or
unlock the
control buttons
to prevent all
the setting from
being changed
by a child.
• For locking /
unlocking, press
Auto and Quick
button
simultaneously.
EXTRA HOT
/ RINSE+
• With each press,
77℃extra hot,
Rinse+, 77℃
extra hot & Rinse+
is repeated.
TIME DELAY
• If you want to delay the start
of selected program, press
this button before start.
• Pressing the delay time will
increase time by 1 hour.
• The delay start time can be
adjusted from 1 hour to 19
hours.
SPRAY
INTENSITY
• With each press, the
level of water jet is
changed to “Strong”,
“Medium”, and
“Soft”.
HALF LOAD
• In case of small load, use
upper or lower rack only
to save energy.
• With each press, can
select upper or lower rack
only.
• In case you don’t select
this button, the machine
always works vario
washing, which operate
upper and lower spray
arm alternately.
POWER
• For operating, press
this button first for
power on.
• After operating, this
button automatically
switches off for safety
and energy saving.
• In case of irregular
surge disturbances to
the machine, the power
may be automatically
turned off for safety.

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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.
If this error letters are displayed, please refer to the trouble
shooting guide page 35 and follow the guide.
※“ ” : No error message.
DELAY START
• If you want to delay the
start of selected program,
press this button before
pressing program button.
• Pressing the Delay Start
will increase time by 1
hour.
• The delay start time can be
adjusted from 1 hour to 19
hours.
INDICATOR
• Refill with
rinse aid
• Child Lock
: Drainage trouble
: Problem of overfilling water
: Water inlet trouble
: Water leakage trouble
: Heater trouble
POWER
•For operating, press this
button first for power on.
•After operating, this
button automatically
switches off for safety and
energy saving.
•In case of irregular surge
disturbance to the
machine, the power may
be automatically turned off
for safety.
BEEP ON/OFF
•The dishwasher must be
switched on.
•The beep on/off function
can be set by pressing the
Intensive and Pre-wash
button simultaneously for
a few seconds. Then, a
“on”will appear in the
time display.
•The beep on/off function
is automatically canceled
when power failure occur.
CHILD LOCK
•Used to lock or unlock the
control buttons to prevent
all the setting from being
changed by a child.
•This function is
automatically canceled
when power failure occur.
•For locking/ unlocking,
press Intensive and
Normal button for a few
seconds simultaneously.
PROGRAM
•When you want to
select program, press
each button.
RINSE
•Repeated pressing of the
Rinse button will select
Extra Hot, Rinse+.
•If you select the Extra
Hot function, the
operationg temperature
will be up to 80℃.
(Intensive, Normal, Eco)
•When you select Rinse+,
an additional rinse cycle is
added.
TRIPLE
SPRAY
•With each press, the level
of water jet is changed to
Strong, Normal and Soft
in a sequence.
4-2-2. LD-1416T

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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.
If this error letters are displayed, please refer to the trouble
shooting guide page 35 and follow the guide.
※“”: No error message.
DELAY START
•If you want to delay the
start of selected program,
press this button before
pressing program button.
•Pressing the Delay Start
will increase time by 1
hour.
•The delay start time can be
adjusted from 1 hour to 19
hours.
INDICATOR
•Refill with
rinse aid
•Child Lock
: Drainage trouble
: Problem of overfilling water
: Water inlet trouble
: Water leakage trouble
: Heater trouble
POWER
•For operating, press this
button first for power on.
•After operating, this
button automatically
switches off for safety and
energy saving.
•In case of irregular surge
disturbance to the
machine, the power may
be automatically turned off
for safety.
BEEP ON/OFF
•The dishwasher must be
switched on.
•The beep on/off function
can be set by pressing the
Intensive and Pre-wash
button simultaneously for
a few seconds. Then, a
“on”will appear in the
time display.
•The beep on/off function
is automatically canceled
when power failure occur.
CHILD LOCK
•Used to lock or unlock the
control buttons to prevent
all the setting from being
changed by a child.
•This function is
automatically canceled
when power failure occur.
•For locking/ unlocking,
press Intensive and
Normal button for a few
seconds simultaneously.
PROGRAM
•When you want to
select program, press
each button.
RINSE
•Repeated pressing of the
Rinse button will select
Extra Hot, Rinse+.
•If you select the Extra
Hot function, the
operationg temperature
will be up to 80℃.
(Intensive, Normal, Eco)
•When you select Rinse+,
an additional rinse cycle is
added.
4-2-3. LD-1415M

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4-2-4. LD-1403W
•If you want to delay the
start of selected program,
press this button before
pressing start button.
•Pressing the delay time
will increase time by 1
hour.
•The delay start time can
be adjusted from 1 hour
to 19 hours.
•In case of small load, use upper or
lower rack only to save energy.
•With each press, can select upper
or lower rack only.
•In case you don’t select this button,
the machine always works vario
washing, which operate upper and
lower spray arm alternately.
•For operating, press this
button first for power on.
•After operating, this
button automatically
switches off for safety and
energy saving.
•If case of irregular surge
disturbances to the
machine, the power may
be automatically turned
off for safety.
DELAY START
BUTTON
•This function is for
saving time and energy.
•With each press, time
save ON and OFF is
repeated.
•When select this
function, the operating
time will be shorten.
TIME SAVE
POWER SWITCH
BUTTON
HALF LOAD
•When power is on,
program is automatically
set to normal.
•If you want to change
the program, press the
button and set the
program you want to.
PROGRAM
•With each
press, rinse+,
rinse+ & 77℃
sani rinse,
77℃sani rinse
is repeated.
RINSE/
SANI
•Used to lock or unlock the
control buttons to prevent all
the setting from being changed
by a child.
•For locking/unlocking, press
Delay Start and T-Save button
simultaneously.
CHILD LOCK
•With each press, Start and
Pause is repeated during
operation.
•If the machine remains in
Pause mode for 10
minutes, the power is
automatically turned off.
START/PAUSE
BUTTON
•Indication of
remaining time
•Self diagnosis and
error message
display
REMAINING
TIME

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4-2-5. LD-1204W/1204M
•If you want to delay the
start of selected program,
press this button before
pressing start button.
•Pressing the delay time
will increase time by 1
hour.
•The delay start time can
be adjusted from 1 hour to
19 hours.
•In case of small load, use upper or
lower rack only to save energy.
•With each press, can select upper or
lower rack only.
•In case you don’t select this button,
the machine always works vario
washing, which operate upper and
lower spray arm alternately.
•For operating, press this
button first for power on.
•After operating, this button
automatically switches off
for safety and energy saving.
•If case of irregular surge
disturbances to the machine,
the power may be
automatically turned
off for safety.
DELAY START
BUTTON
•Indication of remaining
time
•Self diagnosis and error
message display
REMAINING TIME
POWER SWITCH
BUTTON
HALF LOAD
•When power is on, program is
automatically set to normal.
•If you want to change the
program, press the button and
set the program you want to.
PROGRAM
•With each press, rinse+,
rinse+ & 77℃sani rinse,
77℃sani rinse is
repeated.
RINSE/
SANI
•Used to lock or unlock the control
buttons to prevent all the setting
from being changed by a child.
•For locking/unlocking, press Delay
Start and Program button
simultaneously.
CHILD LOCK
•With each press, Start and
Pause is repeated during
operation.
•If the machine remains in
Pause mode for 10 minutes,
the power is automatically
turned off.
START/PAUSE
BUTTON

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4-3 TEST MODE
4-3-1. LD-1426T
CHECK PROGRAM(START IN THE STATE OF THE CLOSED DOOR)
BUTTON The number of
pushing button DISPLAY Load and Chec ing points DOOR
Intensive+Auto
+Power S/W
Intensive KEY
Auto KEY
Eco KEY
Gentle KEY
Quick KEY
Spray KEY
Rinse KEY
Ti e Delay KEY
Half Load KEY
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
n0 All LEDs are Lighting not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
closed
closed
closed
closed
closed
closed
closed
not concerned
closed
closed
not concerned
Spray Intensity “Strong”LED is Lighting
Spray Intensity “Mediu ”LED is Lighting
Spray Intensity “Soft”LED is Lighting
Extra Hot LED is Lighting
Rinse + LED is Lighting
Child lock LED ( ) is Lighting
Rinse refill LED ( ) is Lighting
none
Half Load “Upper”LED is Lighting
Half Load “Lower”LED is Lighting
none
Washing oter
Drain Pu p
Inlet valve
Dispenser
Heater(for 10 sec.)
Fan Moter
none
Ther ister
Lower Nozzle
Upper Nozzle
AUTO OFF S/W
11
22
33
44
66
77
88
99
n1
n2
n3
n4
Frequency
n6
n7
n8
n9
11
12
13
Te perature
Pre-Wash KEY
1 TIME 55

- 14 -
CHECK PROGRAM(START IN THE STATE OF THE CLOSED DOOR)
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
closed
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
closed
closed
closed
not concerned
※ CHECK MODE
BUTTON
BUTTON OPERATION
Intensive + Pre-wash
Eco + Pre-wash
Quick + Pre-wash
Buzz On/Off
Display Inner Te perature
Display Water Supply Frequency
The number of
pushing button DISPLAY Load and Chec ing points DOOR
not concerned
Only LD-1416T
Micro S/W must be ON to operate HEATER
Quick + Pre-wash
+ POWER S/W
Spray In tensity KEY
Rinse KEY
Intensive KEY
Nor al KEY
Eco KEY
Quick KEY
Pre-wash KEY
Start / Pause KEY
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
n : 1H U00
11 : 11
12 : 22
13 : 33
14 : 44
15 : 55
16 : 66
17 : 77
n : 11
n : 12
n : 13
Frequency
n : 15
n : 16
Te perature
n : 18
n : 19
n : 1A
n : 1B
OFF
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
All LEDs are lighting
None Strong, Nor al, Soft
Washing Motor Extra Hot, Rinse+ LED
Drain Pu p Intensive LED
Inlet Valve Nor al LED
Dispenser Eco LED
Heater(for 10 sec.)
Quick LED
Fan Motor Pre-wash LED
None Rinse, Child-Lock LED
Lower Nozzle Wash, Rinse, Dry LED
Upper Nozzle
LQC Test Mode
Reset upper nozzle 5s
*lower nozzle 30s *upper nozzle 15s
rotation: On Heater(70 )
Power OFF
None
4-3-2. LD-1416T/1415M

- 15 -- 15 -
4-3-3. LD-1403W
CHECK PROGRAM(START IN THE STATE OF THE CLOSED DOOR)
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
closed
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
not concerned
closed
closed
not concerned
※ CHECK MODE
BUTTON
BUTTON OPERATION
T-save + Half Load
T-save + Rinse
Display Water Supply Frequency
Display Inner Te perature
The number of
pushing button DISPLAY Load and Chec ing points DOOR
not concerned
Micro S/W must be ON to operate HEATER
Quick + Pre-wash
+ POWER S/W
Delay start KEY
T-Save KEY
Intensive KEY
Nor al KEY
Eco KEY
Gentle KEY
Quick KEY
Pre-wash KEY
Half Load KEY
Rinse KEY
Start / Pause KEY
1 TIME
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
n : 0H
11 : 11
12 : 22
13 : 33
14 : 44
15 : 55
16 : 66
17 : 77
18 : 88
19 : 99
10 : 00
n : 01
Frequency
n : 03
n : 04
n : 05
n : 06
n : 07
n : 08
n : 09
Te perature
n : 11
n : 12
OFF
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
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
None T-save LED
Water level sensor Intensive LED
Washing Motor Nor al LED
Drain Pu p Eco LED
Inlet Valve Gentle LED
Dispenser Quick LED
Heater(for 10 sec.)
Pre-wash LED
Fan Motor Wash, Rinse, Dry LED
None Rinse 1 LED
Ther ister
Lower Nozzle
Upper Nozzle
Power OFF
Rinse 2 LED
Dry LED
OFF

- 16 -
CHECK PROGRAM(START IN THE STATE OF THE CLOSED DOOR)
not concerned
not concerned
not concerned
not concerned
closed
closed
not concerned
closed
closed
closed
closed
closed
closed
closed
closed
not concerned
BUTTON The number of
pushing button DISPLAY Load and Chec ing points DOOR
closed
Micro S/W must be ON to operate HEATER
Quick + Pre-wash
+ POWER S/W
Delay Start KEY
Progra KEY
Half Load KEY
Rinse KEY
Start / Pause KEY
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
n : 1H U00
11 : 11
12 : 22
13 : 33
14 : 44
n : 11
n : 12
n : 13
Frequency
n : 15
n : 16
Te perature
n : 18
n : 19
n : 1A
n : 1B
OFF
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
None Intensive+ LED
Washing Motor Intensive LED
Drain Pu p Nor al LED
Inlet Valve Eco LED
Dispenser Gentle LED
Heater(for 10 sec.)
Quick LED
Fan Motor Pre-wash LED
None wash LED
Lower Nozzle Rinse LED
Upper Nozzle
LQC Test Mode
Reset upper nozzle 5s
*lower nozzle 30s *upper nozzle 15s
rotation: On Heater(70 )
Power OFF
Dry LED
4-3-4. LD-1204W/1204M
※ CHECK MODE
BUTTON OPERATION
Progra + Half Load
Progra + Rinse
Display Water Supply Frequency
Display Inner Te perature

- 17 -- 17 -
5. WIRING DIAGRAM
5-1. LD-1426T
5-2. LD-1416T

- 18 -- 18 -
5-3. LD-1415M
5-4. LD-1403W/1203W/1203M

- 19 -
6. PROGRAM CHART(SCHEMATIC DIAGRAM)
6-1. LD-1426T

- 20 -- 20 -
6-2. LD-1416T