LG LDS4821BB - 24in Full Console Dishwasher User manual

DISHWASHER
SERVICE MANUAL
BEFORE SERVICING THE UNIT, PLEASE READ THIS MANUAL CAREFULLY
FOR SAFETY AND CORRECT SERVICES.
NOTE
MODEL : LDS4821(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.............................................................................. 21
A. TROUBLE SHOOTING ACCORDING TO DISPLAYED ERROR MESSAGE...........21
B. TROUBLE DIAGNOSES AND REPAIR BY SYMPTOM........................................... 23
9. INSTALLATION INSTRUCTION ................................................................................... 27
10. EXPLODED VIEW .......................................................................................................34
11. REPLACEMENT PART LIST .......................................................................................41
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 5/8
Product Weight(lbs) 89lbs
Door Color White, Black, Stainless
Tub Material Stainless Steel
Control Electronic
Rated Power(Watt) 1,350
Heater Power(Watt) 1,200
Programs 4
Upper Rack Position manual
Lower Rack Fixed Tines
Water Consumption 10-26 (Normal)
Power Consumption(kWh/year) 285-310
Operating Time (min) 101-135 (Normal)
Fan Dry System Yes
Delay Start Function No
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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LDS4821 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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4-2. Display Panel LDS 4821 Series
PROCESS INDICATOR (SignaLight
TM
)
• Current program phase is indicated.
INDICATOR
•Child Lock( ): Lamp will turn on when Child Lock setting is on.
•Rinse Aid( ): Refill with rinse aid when Lamp turns on.
TIME REMAINING
•Indicates normal run time for the cycle selected.
•During the cycle, the estimated time remaining for the selected cycle will be displayed.
RINSE
Repeated pressing of the Rinse button will select Sanitary, Extra Rinse or both.
•If you select the Sanitary Function, Sanitary Light blinks when the water temperature meet sanitary
Temp. and illuminates at the end of cycle when Conditions have been met to achieve sanitization.
•When you select Extra Rinse, an additional rinse cycle is added.

NOTE These high temperature rinse sanitizes dishware and glassware in accordance with NSF/ANSI Standard 184 for
Residential Dishwashers. Certified residential dishwashers are not intended for licensed food establishments.
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PROGRAM
•Press the program that corresponds to your desired wash cycle.
CANCEL & CHILD LOCK
•To cancel a running cycle, open the door, then press and hold the POWER SCRUB and NORMAL
buttons together for 3 seconds. The drain pump will be activated and the cycle will be canceled.
•To lock/unlock the buttons, press QUICK and RINSE ONLY simultaneously for 3 seconds. When
CHILD LOCK is set, all buttons are disabled.
POWER
Pressing the POWER button turns on power to the control.
•After the cycle is complete, the power automatically switches off after 4 minutes for safety and
economy.
•If there is an unusual Power surge or disturbance, the power will be automatically turned off for safety
and the cycle will have to be started over.
POWER SCRUB
NORMAL
QUICK
RINSE ONLY
This program is for very heavily soiled loads.
This program is for normally soiled, every loads.
This program is for that quick wash of lightly soiled, recently used dishes
and cutlery.
This program is for just a quick rinse dishes. No detergent is used.



NOTE Only sanitary cycle have been designed to meet the requirements of performance for soil removal and sanitization
efficacy. There is no intention, either directly or indirectly, that all cycle on a certified machine have passed the
sanitization performance test.
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Normal Water Level : 270
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4-3. TEST MODE LDS4821 Series
CHECK PROGRAM
BUTTON The number of
pushing button Top Display Load and Checking points Door open/
closed
RINSE+NORMAL
+POWER S/W
1 TIME n : 3H/U00 All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
Soil Sensor
Wash Pump
Drain Pump
Inlet Valve
Dispenser
Heater (for 10 sec)
Fan
Thermistor
Lower Nozzle(VARIO)
Upper Nozzle(VARIO)
Auto-Off(Wash-Drain-Water Supply)
Both
Both
Both
Both
Both
Closed
Closed
Both
Closed
Closed
Closed
Both
Closed
Closed
Closed
POWER SCRUB
NORMAL
QUICK
RINSE ONLY
RINSE
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
1:11
2:22
3:33
4:44
Soil Level
n:32
n:33
①Frequency
n:35
n:36
n:37
n:38
Temp.(℃)
n:3a
n:3b
n:3c
Both
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5. PARTS NAME
The appearance and specifications may be varied without notice according to localities.
5-3. LDS 4821 Series
INSTALL BRACKET WOOD SCREW
Control Panel
Front Display
Door Handle
Power Button
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
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6. PROGRAM CHART(SCHEMATIC DIAGRAM)
Program chart
LDS 4821 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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Controller Latch Assembly
Controller
3-1. Door Assembly
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 the Front Display.
Remove 8 screws for Controller.
Control Panel Front Cover
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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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Inlet Valve
Cabinet Base
Air Braker
Nut
Gasket
Air Braker
Assembly
9. Cabinet Base
1) Remove 8 screws.
2) Lift it upward.
10. Inlet Valve
1) You can disassemble the lnlet Valve by
removing the 2 screws.
11. 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.
Cabinet Base
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Sump Holder
Hook
Sump
Assembly
1) Heater & Drain Motor
Pull the Heater out of the Sump after
releasing the nut.
Remove 3 screws.
2) Vario Motor
Remove 2 screws for Vario Motor.
Pull the Vario Motor and Micro S/W.
3) Soil Sensor
Pull the Soil Sensor.
12. 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.
Drain Pump
Heater
Vario Motor
Micro
S/W
Soil
Sensor
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13. 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.
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A. TROUBLE SHOOTING ACCORDING TO DISPLAYED ERROR MESSAGE
ERROR MESSAGE POSSIBLE CAUSE REMEDY
FOR ERROR OCCURRENCE
The Water Supply Tap is closed.
The Water Supply is shut off.
The Inlet Hose is kinked.
The Water Pressure is very low.
(below 10 psi)
Inlet Valve is OK?
The filter of Inlet Valve is clogged
by impure water.
The Hall sensor is OK?
The Impeller of Air Guide is bound.
The Drain Hose kinked or blocked.
Wiring connection is OK?
The drain outlet of sump is
blocked.
The Drain Pump/Motor or circuit is
troubled.
Water leakage in Hose connections.
Water is leaked by damages.
The Motor Water Seal leakage of
Sump assembly.
The height of Drain Hose connection
(sink-Drain Hose) is not over 20″
.
Impeller of the Washing Pump is
worn away.
Remove the cause of kink or block.
Check the wiring connection.
Measure the electric resistance of
Drain Motor. (20-40 )
Replace the Drain Motor or repair
the Circuit.
Replace the connections of Hose.
Check the point of damages and
repair or replace the related parts.
Read the Installation Instructions
(page 9) and fix it to the
recommended Height.
Replace the Impeller of the
Washing Pump.
Take action on Water Supply
device.
Measure the electric resistance of
Inlet Valve. (950-1300 )
Clean the filter of Inlet Valve.
Check the frequency of Inlet Water
by the Test Mode.
Replace the Air Braker.
Not reached to the nor-
mal water level in spite
of 10 min. water supply
INLET ERROR
displayed
Condition
Not fully drained out in
spite of 5 min. drain
operation
The excessive RPM of
Washing Motor
happened during Wash
cycle due to water
leakage.
DRAIN ERROR
displayed
Condition
LEAKAGE ERROR
displayed
Condition
8.TROUBLE SHOOTING METHODS
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