LG LDF7932 User manual

DISHWASHER
SERVICE MANUAL
BEFORE SERVICING THE UNIT, PLEASE READ THIS MANUAL CAREFULLY
FOR SAFETY AND CORRECT SERVICES.
NOTE
MODEL : LDF7932(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.............................................................................. 22
A. TROUBLE SHOOTING ACCORDING TO DISPLAYED ERROR MESSAGE...........22
B. STEAM GENERATOR ERROR MESSAGE ............................................................ 24
C. TROUBLE DIAGNOSES AND REPAIR BY SYMPTOM .......................................... 25
9. INSTALLATION INSTRUCTION ................................................................................... 29
10. EXPLODED VIEW .......................................................................................................36
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 1/2
Product Weight(lbs) 97lbs
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 10-26 (Normal)
Power Consumption(kWh/year) 285-310
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)
ITEM SPECIFICATION

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7932 series
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
Adding STEAM to the wash cycles enhances wash performance with very little
additional water or energy consumption. The SteamDelicate™ cycle can be
used for cleaning delicate item such as china or stem ware.
■■Steam Washing and Steam Delicate™

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CYCLES
Press the cycle that corresponds to your desired
wash cycle.
POWER SCRUB
This cycle is for very heavily soiled dishes.
NORMAL
This cycle is for normally soiled, everyday loads.
DUAL INTENSITY
This cycle washes the upper and lower racks at
different spray intensities. The lower rack is washed
with a strong spray for hard to clean items, while the
upper rack is washed with a soft spray for more
delicate items. This provides optimum cleaning
performance for mixed loads, including fine china and
stemware. Both the strong and soft spray lights will
stay on to indicate the dishwasher is in the Dual
Intensity cycle.
QUICK WASH
This is a shortened cycle that is perfect for recently
used or lightly soiled loads.
STEAM DELICATE
This cycle adds the gentle power of steam to boost
the cleaning power of the delicate cycle. The cycle is
perfect for effectively cleaning delicate items like fine
china or stemware.
STEAM FRESH
This cycle can be used to freshen up dishes that may
have been stored or not used for a long time.
CHIME ON/OFF
To enable or disable the chime, press and hold the
Quick Wash and Rinse buttons for 2 seconds.
RINSE ONLY
This cycle is a quick rinse for dishes that will not be
washed immediately. No detergent should be used.
To select the Rinse Only cycle, press the Power
button; then press the Rinse button once without
pressing any other cycle buttons.
Control panel may vary on some models.
4-2. Display Panel LDF 7932 Series
1
NOTE: If a main cycle has been selected, the Rinse
Only cycle will not be available without first shutting
the power off.
CANCEL
To cancel a running cycle, open the door and then
press and hold the Dual Intensity and Quick Wash
buttons together for 3 seconds. The drain pump
will be activated and the cycle will be cancelled.
CYCLE OPTIONS AND DISPLAY
Press the desired cycle option buttons to select
and set any of the dishwasher’s options described
below. The display will show the selected cycle
times and cycle options.
SPRAY (INTENSITY)
Repeated pressing of the Spray button will select
the desired spray. The strong, medium, or soft light
will show in the top left portion of the display.
RINSE
Repeated pressing of the Rinse button will select
the desired Rinse option. The Sanitary, Extra Rinse,
or Sanitary and Extra Rinse lights will show in the
bottom left portion of the display.
•If you select the Sanitary feature, the Sanitary light
will blink until the water is heated to the sanitary
temperature level*. Once the sanitary temperature
level is reached, the light will stay on to indicate
that the sanitary temperature has been reached.
*NOTE: This high-temperature rinse sanitizes
dishware and glassware in accordance with
NSF/ANSI Standard 184 for residential
dishwashers. Certified dishwashers are not
intended for licensed food establishments.
•When you select Extra Rinse, an additional
rinse cycle is added.
•Rinse Only
2
3
STRONG MEDIUM
SANITARY EXTRA RINSE
SOFT

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CHILD LOCK
Lamp will turn on when Child Lock
setting is on.
•To lock/unlock the buttons, press SPRAY
and RINSE simultaneously for 3 seconds
with the door open.
•Lock the control buttons during cycle operation
to prevent settings from being changed.
RINSE AID
Refill with rinse aid when the lamp
turns on.
DIGITAL DISPLAY
The Digital Display on the control panel
shows the estimated cycle and option
times in a two-digit display.
When the dishwasher is powered up, the display
will be blank. When the cycle and options are
selected, the display will show the total estimated
time to complete those selections. During
operation, the display shows the remaining
estimated operating time.
NOTES:
•The estimated time shown in the display does
not include delay times for heating water, etc.
•If total time exceeds 99 minutes, the display
shows times in whole hours. (2H, 3H, etc.)
•If Delay Wash is selected,
DELAY START
•To delay the start of a selected cycle, press
the Delay Start button.
•Each time Delay Start is pressed will delay
the start of the cycle by one additional hour.
•The delay start time can be set from 1 to 12
hours in one-hour increments.
STEAM
•Press the Steam button to add steam to a
selected cycle.
•The Steam symbol light will stay on when the
STEAM option has been selected.
•The symbol light will blink while steam is being
injected into the dishwasher.
POWER
•Pressing the Power button turns on power
to the controls.
•After the cycle is complete, the power
automatically turns off for safety and economy.
•If there is a power surge, power outage,
or disruption of any kind, the power will be
automatically turned off for safety, and the
cycle will need to be restarted.
DISPLAY AREA
4

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4-3. TEST MODE LDF 7932 Series
CHECK PROGRAM
BUTTON The number of
pushing button
Top
Display Load and Checking points Door open/ closed
Spray + Rinse +
POWER
Power Scrub
Normal
Dual Wash
Quick Wash
Steam Delicate
Steam Fresh
Spray
Rinse
Steam
Delay start
Normal water level : 270 ~ 275
Pure water : more than 130
H: High water level / L: Low water level
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
14 TIME
15 TIME
Steam generator
Temp( )
H1
33
 Frequency
35
36
37
38
Sump Temp( )
 Soil level
3B
Steam generator
Water level
3D
3E
3F
3H U0
11
22
33
44
55
66
77
88
99
Steam generator
Thermistor
Steam generator
Heater (for 1.2 sec)
Drain Pump
Inlet Valve
Dispenser
Sump Heater
(for 10 sec)
Fan Motor
Sump Thermistor
Soil sensor
Wash Pump
 H170  /L170 
Lower Nozzle
(Vario)
Upper Nozzle
(Vario)
W/Pump+Vario+
Heater (for 1min)
All LEDs
All LEDs
All LEDs
All LEDs
All LEDs
All LEDs
All LEDs
All LEDs
All LEDs
All LEDs
All LEDs
All LEDs
All LEDs
All LEDs
All LEDs
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
All LEDs are lighting
All LEDs are lighting
All LEDs are lighting
Both
Both
Both
Both
Both
Both
Both
Both
Both
Both
Closed
Both
Closed
Closed
Closed
Closed
Closed
Both
Both
Closed
Both
Closed
Closed
Closed
※Steam Demo mode : Steam + Power

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5. PARTS NAME
1
2
4
5
3
6
9
7
8
12
15
16
13
14
10
11 17
18
1
CONTROL PANEL
DOOR HANDLE
FRONT COVER
LOWER COVER
LEVELING FEET
FRONT DISPLAY (SignaLight™)
BASE
TOP SPRAY ARM
UPPER SPRAY ARM
STEAM NOZZLE
LOWER SPRAY ARM
DETERGENT AND RINSE AID
DISPENSER
DRYING VENT COVER
UPPER RACK
SILVERWARE BASKET
LOWER RACK
TOP DISPLAY
POWER BUTTON
The appearance and specifications may be varied without notice according to localities.
5-3. LDF 7932 Series
INSTALL BRACKET WOOD SCREW

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6. PROGRAM CHART(SCHEMATIC DIAGRAM)
LDF 7932 Series
Program chart

- 13 -- 13 -
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

- 14 -- 14 -
Control Panel Front Cover
C
ontroller
Controller
Latch Assembly
3-1. Door Assembly
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.

- 15 -- 15 -
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

- 16 -- 16 -
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.

- 17 -- 17 -
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

- 18 -- 18 -
9. Cabinet Base
1) Remove 8 screws.
2) Lift it upward.
12. Foot & Nut
1) Pull the Foot twisting
2) Pull the Nut pushing the hook.
Cabinet Base
Float Assembly
WaterLevel
Sensor (High)
Thermistor
Heater
Water Level
Sensor (Low)
10. Float Assembly
1) Press the Float hook.
2) Pull the Float Assembly
11. Steam Generator
1) Disconnect the 3 hoses assembly.
2) You can disassemble the Steam generator
by removing the 2 screws.
Steam
Generator
Nut
Foot
CAUTION
Be cautious in case of the generator is hot
temperature.

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Inlet Valve
Cabinet Base
Air Braker
Nut
Gasket
Air Braker
Assembly
14. Inlet Valve
1) You can disassemble the lnlet Valve by
removing the 2 screws.
13. Rear Leg Adjustment System
1) Remove 2 screws.
2) Pull the Holder.
3) Pull the Leg Adjust.
4) Pull the Shaft Assembly.
15. 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.
Holder
Leg Adjust
Shaft Assembly

- 20 -- 20 -
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.
16. 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

- 21 -- 21 -
17. 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.