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 |
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2. SPECIFICATIONS ........................................................................................................... |
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3. |
WIRING DIAGRAM........................................................................................................ |
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4. FEATURES & TECHNICAL EXPLANATION ................................................................... |
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5. PARTS NAME ................................................................................................................ |
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6. |
PROGRAM CHART ..................................................................................................... |
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7. |
HOW TO DISASSEMBLE ............................................................................................ |
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8. |
TROUBLE SHOOTING METHODS.............................................................................. |
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A. TROUBLE SHOOTING ACCORDING TO DISPLAYED ERROR MESSAGE........... |
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B. TROUBLE DIAGNOSES AND REPAIR BY SYMPTOM........................................... |
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9. |
INSTALLATION INSTRUCTION ................................................................................... |
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10. EXPLODED VIEW ....................................................................................................... |
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11. REPLACEMENT PART LIST ....................................................................................... |
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- 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.
2. SPECIFICATION
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ITEM |
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SPECIFICATION |
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Rated Voltage / Frequency |
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AC 120V/60Hz |
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Installation |
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Built-In |
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Place Settings |
16 |
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Product Dimension(in) |
23 3/4̋x 24 5/8̋x 33 5/8̋ |
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Product Weight(lbs) |
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89lbs |
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Door Color |
White, Black, Stainless |
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Tub Material |
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Stainless Steel |
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Control |
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Electronic |
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Rated Power(Watt) |
1,350 |
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Heater Power(Watt) |
1,200 |
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Programs |
4 |
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Upper Rack Position |
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manual |
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Lower Rack |
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Fixed Tines |
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Water Consumption |
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10-26 (Normal) |
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Power Consumption(kWh/year) |
285-310 |
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Operating Time (min) |
101-135 (Normal) |
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Fan Dry System |
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Yes |
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Delay Start Function |
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No |
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Auto-Off Power Switch |
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Yes |
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Process Monitor |
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Yes |
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Wash Level |
5 |
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Racks |
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Nylon Coating |
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Operating Water Pressure (Bar) |
20-120 (140-830kPa) |
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- 5 -
3. WIRING DIAGRAM
LDS4821 serise
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4. FEATURES & TECHNICAL EXPLANATION
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 MotorTM
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
Moist
Air
Dry
Air
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.
Mixed
Air
■ Vario Spray System
to Upper Arm
to Lower Arm
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
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.
Fine Mesh
- 7 -
4-2. Display Panel LDS 4821 Series
INDICATOR (SignaLight TM) program phase is indicated.
Lock( 
): Lamp will turn on when Child Lock setting is on.
Aid( 
): Refill with rinse aid when Lamp turns on.
REMAINING
normal run time for the cycle selected.
the cycle, the estimated time remaining for the selected cycle will be displayed.
pressing of the Rinse button will select Sanitary, Extra Rinse or both.
select the Sanitary Function, Sanitary Light blinks when the water temperature meet sanitary
. and illuminates at the end of cycle when Conditions have been met to achieve sanitization. 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.
- 8 -
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the program that corresponds to your desired wash cycle.
SCRUB This program is for very heavily soiled loads.
NORMAL This program is for normally soiled, every loads.
QUICK
This program is for that quick wash of lightly soiled, recently used dishes and cutlery.
ONLY This program is for just a quick rinse dishes. No detergent is used.
& CHILD LOCK
a running cycle, open the door, then press and hold the POWER SCRUB and NORMAL together for 3 seconds. The drain pump will be activated and the cycle will be canceled.
the buttons, press QUICK and RINSE ONLY simultaneously for 3 seconds. When LOCK is set, all buttons are disabled.
the POWER button turns on power to the control.
the cycle is complete, the power automatically switches off after 4 minutes for safety and
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is an unusual Power surge or disturbance, the power will be automatically turned off for safety 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.
- 9 -
4-3. TEST MODE LDS4821 Series
CHECK PROGRAM
BUTTON |
The number of |
Top |
Load and Checking points |
Door open/ |
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pushing button |
Display |
closed |
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RINSE+NORMAL |
1 TIME |
n : 3H/U00 |
All LEDs are lighting |
Both |
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+POWER S/W |
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POWER SCRUB |
1 TIME |
1:11 |
All LEDs are lighting |
Both |
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NORMAL |
1 TIME |
2:22 |
All LEDs are lighting |
Both |
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QUICK |
1 TIME |
3:33 |
All LEDs are lighting |
Both |
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RINSE ONLY |
1 TIME |
4:44 |
All LEDs are lighting |
Both |
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1 |
TIME |
Soil Level |
Soil Sensor |
Both |
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2 TIME |
n:32 |
Wash Pump |
Closed |
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3 |
TIME |
n:33 |
Drain Pump |
Closed |
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4 |
TIME |
Frequency |
Inlet Valve |
Both |
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5 |
TIME |
n:35 |
Dispenser |
Closed |
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RINSE |
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TIME |
n:36 |
Heater (for 10 sec) |
Closed |
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7 |
TIME |
n:37 |
Fan |
Closed |
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8 |
TIME |
n:38 |
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9 |
TIME |
Temp.( ) |
Thermistor |
Both |
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10 |
TIME |
n:3a |
Lower Nozzle(VARIO) |
Closed |
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TIME |
n:3b |
Upper Nozzle(VARIO) |
Closed |
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12 |
TIME |
n:3c |
Auto-Off(Wash-Drain-Water Supply) |
Closed |
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Normal Water Level : 270
- 10 -
5. PARTS NAME
5-3. LDS 4821 Series |
Control Panel |
Top Spray Arm |
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Front Display |
Upper Spray Arm |
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Door Handle |
Lower Spray Arm |
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Power Button |
Detergent & Rinse Aid Dispenser |
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Front Cover |
Vapor Vent Cover |
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Lower Cover |
Upper Rack |
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Leveling Foot |
Cutlery Basket |
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Base |
Lower Rack |
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INSTALL BRACKET |
WOOD SCREW |
The appearance and specifications may be varied without notice according to localities.
-11 -
6. PROGRAM CHART(SCHEMATIC DIAGRAM)
LDS 4821 Series
Program chart |
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7. HOW TO DISASSEMBLE
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 |
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1. Lower Cover and Lower Felt |
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1) |
Remove the front 2 screws. |
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2) |
Remove the Inlet Hose and Power Supply |
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Cable. |
Lower Cover |
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2. Tub Felt |
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Tub Felt |
1) |
Tub Felt |
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Assembly |
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the door. |
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6 screws(stainless). |
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Panel Assembly |
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8 screws(Stainless). |
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Remove the wire connections. |
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Be sure the wiring should not be |
Control Panel |
Front Cover |
changed in reassembling |
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Remove the Latch assembly. |
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Remove the Front Display. |
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Remove 8 screws for Controller. |
Controller |
Latch Assembly |
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Controller |
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