LG LDS4821WW, LDS4821BB, LDS4821ST Service Manual
DISHWASHER
SERVICE MANUAL
NOTE
BEFORE SERVICING THE UNIT, PLEASE READ THIS MANUAL CAREFULLY
FOR SAFETY AND CORRECT SERVICES.
MODEL : LDS4821(WW,BB,ST)
CONTENTS
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
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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 3/4
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
SPECIFICATION
x 24 5/8x 33 5/8
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)
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3. WIRING DIAGRAM
LDS4821 serise
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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 Motor
■■
Hybrid Drying System
■■
Vario Spray System
TM
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.
■■
Self Cleaning Filter
Soil Sensor
to Drain
Fine Mesh
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.
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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.
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.
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.
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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4-3. TEST MODE LDS4821 Series
CHECK PROGRAM
BUTTON
RINSE+NORMAL
+POWER S/W
POWER SCRUB
NORMAL
QUICK
RINSE ONL Y
RINSE
The number of
pushing button
1 TIME n : 3H/U00 All LEDs are lighting
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
Top
Display
1:11
2:22
3:33
4:44
Soil Level
n:32
n:33
①
Frequency
n:35
n:36
n:37
n:38
℃)
Temp.(
n:3a
n:3b
n:3c
Load and Checking points
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)
Door open/
closed
Both
Both
Both
Both
Both
Both
Closed
Closed
Both
Closed
Closed
Closed
Both
Closed
Closed
Closed
Normal Water Level : 270
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5. PARTS NAME
5-3. LDS 4821 Series
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
INSTALL BRACKET WOOD SCREW
The appearance and specifications may be varied without notice according to localities.
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6. PROGRAM CHART(SCHEMATIC DIAGRAM)
Program chart
LDS 4821 Series
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7. HOW TO DISASSEMBLE
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) Remove the Inlet Hose and Power Supply
Cable.
Tub Felt
2. Tub Felt
1) Tub Felt
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3-1. Door Assembly
Control Panel Front Cover
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.
Controller
Latch Assembly
Controller
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