LG DLGX3876, DLEX3875, DLEX3885 Service Manual

U.S.A. Website: http://us.lgservice.com Canadian Website: http://lg.ca
ELECTRIC & GAS DRYER
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY IN ORDER TO PROPERLY DIAGNOSE PROBLEMS AND TO SAFELY PROVIDE QUALITY SERVICE ON THESE DRYERS.
DLEX3885* DLGX3886* DLEX3875* DLGX3876*
JAN. 2010 PRINTED IN KOREA
P/No.: MFL62119907
2
To avoid personal injury, disconnect power before servicing this product. If electrical power is required
for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks.
!
WARNING !
WHAT TO DO IF YOU SMELL GAS:
IMPORTANT SAFETY NOTICE
The information in this service guide is intended for use by individuals possessing skill and experience in electrical, electronic, and mechanical appliance repair. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.
RECONNECT ALL GROUNDING DEVICES
If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are
removed for service, they must be returned to their original position and properly fastened.
IMPORTANT
Electrostatic Discharge (ESD)
Sensitive Electronics
ESD problems are present everywhere. ESD may damage or weaken the electronic control assembly. The new control assembly may appear to work well after repair is finished, but failure may occur at a later date due to ESD stress.
Use an anti-static wrist strap. Connect wrist strap to green ground connection point or unpainted metal in the appliance.
- OR -
Touch your finger repeatedly to a green ground connection point or unpainted metal in the appliance.
Before removing the part from its package, touch the anti-static bag to a green ground connection point or unpainted metal in the appliance.
Avoid touching electronic parts or terminal contacts; handle electronic control assembly by edges only.
When repackaging failed electronic control assembly in anti-static bag, observe above instructions.
Do not try to light a match, or cigarette, or turn on
any gas or electrical appliance.
Do not touch any electrical switches. Do not use
any phone in your building.
Clear the room, building or area of all occupants.
Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s instructions carefully.
If you cannot reach your gas supplier, call the fire
department.
CONTENTS
1. SPECIFICATIONS ............................................................................................................... 4
2. FEATURES AND BENEFITS ............................................................................................... 6
3. INSTALLATION INSTRUCTIONS ........................................................................................ 6
4. DRYER CYCLE PROCESS ................................................................................................ 13
5. COMPONENT TESTING INFORMATION ......................................................................... 14
6. MOTOR DIAGRAM AND SCHEMATIC ............................................................................. 17
7. WIRING DIAGRAM ............................................................................................................ 18
8. STEAM FUNCTION ............................................................................................................ 19
8-1. STEAM CYCLE GUIDE ............................................................................................ 19
8-2. TROUBLESHOOTING FOR STEAM DRYER .......................................................... 20
8-3. DISPLAY FAULT/ERROR CODES FOR STEAM DRYER ........................................ 21
9. FLOW SENSOR FUNCTION ............................................................................................. 22
9-1. FLOW SENSOR ....................................................................................................... 22
9-2. INSTALLATION CHECK .......................................................................................... 23
9-3. TROUBLESHOOTING FOR FLOW SENSOR DRYER ............................................ 24
10. DIAGNOSTIC TEST ........................................................................................................ 25
10-1. TEST 1 120V AC ELECTRICAL SUPPLY ............................................................ 26
10-2. TEST 2 THERMISTOR TEST - MEZSURE WITH POWER OFF ......................... 29
10-3. TEST 3 MOTOR TEST ......................................................................................... 30
10-4. TEST 4 MOISTURE SENSOR .............................................................................. 31
10-5. TEST 5 DOOR SWITCH TEST ............................................................................. 32
10-6. TEST 6 HEATER SWITCH TEST - ELECTRIC TYPE .......................................... 33
10-7. TEST 7 GAS VALVE TEST - GAS TYPE .............................................................. 34
10-8. TEST 8 SEMI-CONDUCTOR ............................................................................... 35
10-9. TEST 9 MOTOR ASSEMBLY, DC, PUMP ............................................................ 35
10-10. TEST 10 GENERATOR ASSEMBLY .................................................................. 36
11. CHANGE GAS SETTING (NATURAL GAS, PROPANE GAS) ....................................... 37
12. DISASSEMBLY INSTRUCTIONS .................................................................................... 39
13. EXPLODED VIEW ............................................................................................................ 49
13-1-1. Control Panel and Plate Assembly (Touch LCD type) ......................................... 49
13-1-2. Control Panel and Plate Assembly 50
13-2. PANEL DRAWER ASSEMBLY and GUIDE ASSEMBLY ......................................... 51
13-3-1. CABINET and DOOR ASSEMBLY: ELECTRIC TYPE ........................................ 52
13-3-2. CABINET and DOOR ASSEMBLY: GAS TYPE .................................................. 53
13-4-1. DRUM and MOTOR ASSEMBLY: ELECTRIC TYPE ........................................... 54
13-4-2. DRUM and MOTOR ASSEMBLY: GAS TYPE ..................................................... 55
3
1
SPECIFICATIONS
Name: Electric and Gas Dryer
Power supply: Please refer to the rating label regarding detailed
Size : 27 X 30 X 38.7 (inch)
Dryer capacity: IEC 7.4 cu.ft.
Weight: 136(lbs)
Specifications are subject to change by manufacturer.
ACCESSORIES
Dryer rack (1 each)
information.
Stacking kit (1 each)
Purchased Separately
Pedestal (1 each)
Purchased Separately
See page 6
See page 7 See page 8
4
ITEM
DLEX3885* DLGX3886* DLEX3875* DLGX3876*
REMARK
Color
Material & Finish
Top Plate
Door Trim
POWER SUPPLY
MOTOR
ELECTRICITY
HEATER
CONSUMPTION
GAS VALVE
AG HEATER
DC, PUMP
CONTROL TYPE
DRUM CAPACITY
Weight (lbs) - Net/Gross
No. of Programs
LAMP
Blue White / Stainless Silver / Vintage Gold
Porcelain
Chromate
120V/240V 60Hz (26A)
250W (4.5A)
5400W (22.5A)
15 W (0.2A)
13 W (0.11A) x 2
1100W (9.2A)
2.4W (0.15A)
Electronic
7.4 cu.ft.
136 / 155.7
9
AC 120V
AC 240V (ELECTRIC MODEL)
AC 120V
AC 120V (GAS MODEL)
AC 120V (STEAM MODEL)
DC 9V (STEAM MODEL)
AC 240V (ELECTRIC MODEL)
No. of Dry Options
No. of Temperature Controls
No. of Dry Levels
Sound levels
Moisture
Sensor
Temperature
Reversible Door
Drum
Dryer Rack
Child Lock
Interior Light
Product (WxHxD)
Packing (WxHxD)
5
5
5
5
Available
Available
Available
Stainless Steel
Available
Available
Available
27" x 42 3/4" x 28 1/3"
29 1/2" x 44 3/4" x 30 3/4"
5
Electrode sensor, Dual Sensor
Thermistor, Dual Sensor
2
FEATURES AND BENEFITS
3
Dryer Rack Installation Instructions
INSTALLATION INSTRUCTIONS
Open the door. Hold the dryer rack with both hands.
Put the dryer rack into the drum
Check and be sure that the front of the rack is properly seated behind the lint filter.
6
Stacking Kit Installation Instructions
To ensure safe and secure installation, please observe the instructions below.
WWAARRNNIINN GG
Do not attempt this alone!
At least two people are required to lift and position the dryer on top of a washing machine! Failure to heed this warning can result in serious physical injury and damage to the appliance.
Stacking kit
Place the washer firmly on a stable, even and solid floor as product installation instructions describe in the owner’s manual.
Secure the side bracket to the washer with a screw on the back of the bracket. Repeat Steps 2, 3, and 4 for the other side.
Place the dryer on top of the washer by placing the legs as shown. Be careful not to pinch fingers between the washer and dryer. Slide the dryer back against the stop on the side rail.
Peel the protective paper from the tape on the side bracket.
Fit the side bracket firmly to the side of the top plate by attaching the double-faced tape to the top plate as picture shown.
Insert the front rail of the stacking kit. Push the front rail back against the stops on the side brackets.
Attach the front bracket to the side rails with a screw on each side.
• Do not use a stacking kit with a gas dryer in
7
potentially unstable conditions like a mobile home.
Pedestal Installation Instructions
The pedestal accessory includes:
Drawer divider (1)
Screws (18) †
† Dryer installation only uses 8 screws †† For dryer only
Wrench (1)
T-clips (4) ††
Tools Needed for Installation:
Phillips-head screwdriver
Wrench (supplied)
To ensure safe and secure installation, please thoroughly follow the instructions below.
WARNING
Incorrect installation can cause serious accidents.
The appliances are heavy. Two or more people are required when installing the pedestal. There is a risk of serious back injury or other injuries.
• Do not allow children to play in or on the drawer.
There is a risk of suffocation or injury.
• Do not step on the handle. There is a risk of serious injury.
• If appliances are already installed, disconnect them from all power, water, or gas lines and from draining or venting connections. Failure to do so can result in
electrical shock, fire, explosion, or death.
• When installing, gloves must be put on.
Place the dryer on the pedestal. Make sure the front and back feet are in the correct positions. The dryer feet will fit into the innermost positions as shown.
Make sure the screws on the pedestal align with the holes in the retainers, then install 4 screws on each side to securely attach the appliance to the pedestal.
NOTE: If the screws are not installed properly, noise and vibration may result.
Move the appliance to the desired location.
Loosen the locknuts on all 4 leveling feet of the pedestal until you can turn them with the wrench. Turn clockwise to raise or counterclockwise to lower until the pedestal is level and all 4 feet are solidly against the floor.
For dryer
For washer/combo
Make sure the leveling feet of the dryer are fully retracted.
NOTE: The appliance and pedestal assembly must be placed on a solid, sturdy, level floor for proper operation.
Retract fully
Insert the T-clip of the 4 retainers into the dryer base as shown. Press up on the back of the clip and pull outward to lock into place.
T-clip
Retainer
Raise
Securely tighten all locknuts by hand. NOTE: Noise and vibration may result if locknuts are not
tightened. Be sure to connect the appliances to all water, power,
or gas lines and draining or venting connections before operation.
If there is excessive vibration during the first operation after installation, slightly adjust the leveling feet.
8
Locknut
Lower
9
Use the instructions under option 2 or 3 if your home has a 3-wire receptacle (NEMA type 10-30R). Use option 2 if local codes and ordinances permit the connection of a chassis ground to the neutral connector. If this is not permitted, use option 3.
Review the following options to determine the appropriate electrical connection for your home:
Electric Dryer Only
If this type is available at your home. you will be connecting to a fused disconnect or circuit breaker box
Important :Grounding through the neutral conductor is prohibited for (1) new branch-circuit installations, (2) mobile homes, and (3) recreational vehicles, and (4) areas where local codes prohibit grounding through the neutral conductor.
Prepare minimum 5ft(1.52m) of length in order for dryer to be replaced.
First, peel 5 inch (12.7cm) of covering material from end. Make a 5 inch of ground wire bared. After cutting 1
1
/2 inch (3.8cm) from 3 other wires. peel insulation back 1inch (2.5cm). Make ends of 3 wires a hook shape.
Then, put the hooked shape end of the wire under the screw of the terminal block(hooked end facing rightward) and pinch the hook together and screw tightly.
Use the instructions under option 1 if your home homehas a 4-wire receptacle (NEMA type 14-30R).
If this type is available at your home. you will be connecting to a fused disconnect or circuit breaker box
1. Connect neutral wire(white) of power cord to center
terminal block screw.
2. Connect red and black wire to the left and right
terminal block screws.
3. Connect ground wire(green) of power cord to external
ground screw and move neutral ground wire of appliance and connect it to center screw.
4. Make sure that the strain relief screw is tightened.
and be sure that all terminal block nuts are on tight and power cord is in right position.
1"
(2.5 cm)
5
"
(12.7 cm)
3-wire direct
4-wire receptacle (NEMA type14-30R)
3-wire receptacle (NEMA type10-30R)
4-wire direct
5"
(12.7 cm)
4-wire connection : Direct wire
1"
(2.5 cm)
5
"
(12.7 cm)
D E
F
a
C
b
10
Important : Grounding through the neutral conductor is prohibited for (1) new branch-circuit installations, (2) mobile homes, and (3) recreational vehicles, and (4) areas where local codes prohibit grounding through the neutral conductor.
Prepare minimum 5ft(1.52m) of length in order for dryer to be replaced.
First, peel 3
1
/2 inch (8.9cm) of covering material
from end and bare 1 inch from the ends.
1. Connect neutral wire(white) of power cord to center terminal block screw.
2. Connect red and black wire to the left and right terminal block screws.
3. Make sure that the strain relief screw is tightened and be sure that all terminal block nuts are on tight and power cord is in right position.
Then, put the hooked shape end of the wire under the screw of the terminal block(hooked end facing rightward) and pinch the hook together and screw tightly.
1
"
(
2
.
5
c
m
)
3V
2
"
(8.9 cm)
3-wire connection : Direct wire
1. Connect the neutral wire (white) of the power cord to the center terminal block screw.
2. Connect the red and black wires to the left and right terminal block screws.
3. Connect the ground wire (green) of the power cord to the external ground screw. Remove the neutral ground wire of appliance and connect it to center screw.
4. Make sure that the strain relief screw is tightened and that all terminal block nuts are tight and the power cord is in the right position.
F
a
b
E
D
C
lf your local codes or ordinances do not allow the use of a 3 wire connection, or you are installing your dryer in a mobile home, you must use a 4-wire connection.
Option 1: 4-wire connection with
a Power supply cord.
C
B
D
a
E
11
1. Remove the appliance ground wire (D) (green) fromthe external ground connector screw and reconnect it, together with the center, white, neutral wire (E) to the center, silver colored, terminal block screw.
2. Connect the other two power cord wires (red and black) to the left and right terminal block screws and tighten securely.
3. Tighten the strain relief screws securely.
4. Connect an independent ground wire (F) from the external ground connector screw to a proper ground. (The ground wire must be long enough to allow the appliance to be moved, if necessary, for service or cleaning.)
C
B
A
lf your local codes or ordinances permit the connection of a frame-grounding conductor to the neutral wire, use these instructions. If your local codes or ordinances do not allow the connection of a frame-grounding conductor to the neutral wire, use the instructions under Option 3: Optional
3-wire connection.
1. Connect the neutral (white or center) wire (B) to the center, silver colored, screw (A) and tighten securely.
2. Connect the other two power cord wires (red and black) to the left and right terminal block screws and tighten securely.
3. Tighten the strain relief screws (C) securely.
Option 2: 3-Wire Connection with
a Power Supply Cord
If your local codes or ordinances do not allow the connection of a frame-grounding conductor to the neutral wire, use the instructions under this section.
E
A
D
F
Option 3: Optional 3-wire
connection.
12
3-2. Connect Gas Supply Pipe (Gas Dryer ONLY)
2
3
5
1
4
1. Make certain your dryer is equipped for use with the type of gas in your laundry room. Dryer is equipped at the factory for Natural Gas with a
3
/8” NP T gas
connection.
2. Remove the shipping cap from the gas connection at the rear of the dryer. Make sure you do not damage the pipe thread when removing the cap.
3. Connect to gas supply pipe using a new flexible stainless steel connector.
4. Tighten all connections securely. Turn on gas and check all pipe connections (internal and external) for gas leaks with a non-corrosive leak detection fluid.
5. For LP (Liquefied Petroleum) gas connection, refer to section on Gas Requirements.
For further assistance, refer to section on Gas Requirements.
1 New Stainless Steel Flexible Connector - Use
only if allowed by local codes (Use Design A.G.A. Certified Connector)
2
1
/8” NPT Pipe Plug
(for checking inlet gas pressure)
3 Equipment Shut-Off Valve-Installed within 6’
(1.8 m) of dryer
4 Black Iron Pipe
Shorter than 20’ (6.1 m) - Use
3
/8” pipe
Longer than 20’ (6.1 m) - Use
1
/2” pipe
5
3
/8” NPT Gas Connection
4
Cycle
Default
Conditions of operation and termination
Tem p-
erature
Dry
Level
Display
time
Sensor
Dry *
Manual
Dry **
STEAM FRESH
TM
ANTIBACTE­RIAL
BULKY / LARGE
HEAVY DUTY
PERM PRESS CASUAL
COTTON / NORMAL
DELICATES
TOWELS
SMALL LOAD
SPORTS WEAR
STEAM SAINTARY
TM
SPEED DRY
AIR DRY
FRESHEN UP
HIGH
MEDIUM
MEDIUM
Off
Off
Off
Off
Off
Ver y
Dry
HIGH
HIGH
HIGH
LOW
HIGH
NO
HEAT
20min
Saturation
Saturation
Saturation
Saturation
Saturation
Saturation
Saturation
Saturation
Saturation
Saturation
Saturation
Saturation
66±4˚C 45 ±5˚C
45 ±5˚C
45 ±5˚C
45 ±5˚C
45 ±5˚C
38 ±5˚C
(47 ±5˚C)
45 ±5˚C
45 ±5˚C
45 ±5˚C
68±4˚C
68±4˚C
68±4˚C
60±4˚C
52±3˚C
66±4˚C
68±4˚C
60±4˚C
(68±5˚C)
(66±5˚C)
5min
5min
5min
5min
5min
5min
5min
5min
5min
5min
5min
39min
70min
Normal
Adjustable
LOW
Saturation
45 ±5˚C
52±3˚C
5min
32min
54min
41min
28min
55min
30min
27min
15min
30min
25min
Drying Cooling
Wrinkle care
Time
Electro-
sensor
Te mp-
Control
Default
time
Temp-
Control**
3Hr
3Hr
Load
Motor
Heater
Temperature Control for each cycl e
Off Time: 6min
On Time: 10sec
*Sensor dry : Dry Level is set by users.
**Manual dry : Temperature control is set by users.
Default settings can be adjusted by users.
HIGH
HIGH
MEDIUM
Mid High
Normal
Adjustable
MEDIUM
Saturatio
n
45 ±5˚C
60±4˚C
5min
55min
Normal
Adjustable
Normal
Adjustable
Normal
Adjustable
Normal
Adjustable
Normal
Adjustable
(66±5˚C)
5min
(45 ± 5˚C)
DRYER CYCLE PROCESS
13
14
When checking the component, be sure to turn the power off, and do voltage discharge sufficiently.
COMPONENT TESTING INFORMATION
5
!
CAUTION
Component Test Procedure Check result Remark
1. Thermal cut off
Check Top Marking: N130
Measure resistance of terminal to terminal
Open at 266±12°F (130±7°C)
Auto reset 31°F (35°C)
Same shape as Outlet Thermostat.
If thermal fuse is open must be replaced
Resistance value ≒∞
Continuity (250°F ↓) < 1Ω
Heater case­Safety
Electric type
2. Hi limit Thermostat (Auto reset)
Measure resistance of terminal to terminal
Open at 257±9°F (125±5°C)
Close at 221±9°F (105±5°C)
Resistance value ≒∞
Resistance value < 5Ω
Heater case ­Hi limit
Electric type
3. Outlet Thermostat ( Auto reset)
Check Top Marking:
N85
Measure resistance of terminal to terminal
Open at 185±9°F (85±5°C)
Close at 149±9°F (65±5°C)
Same shape as Thermal cut off.
Resistance value ≒∞
Resistance value < 5Ω
Blow housing ­Safety
Electric type
4. Lamp holder Measure resistance of terminal to terminal
Resistance value: 80Ω ~ 100Ω
6. Idler switch Measure resistance of the following terminal:
COM - NC
1. lever open
Resistance value < 1Ω
2. Lever push (close)
Resistance value ≒∞
5. Door switch Measure resistance of the following terminal
1) Door switch knob: open
Terminal: COM - NC (1-3) Terminal: COM - NO (1-2)
2) Door switch push: push
Terminal: COM - NC (1-3) Terminal: COM - NO (1-2)
Resistance value < 1Ω Resistance value ≒∞
Resistance value ≒∞ Resistance value < 1Ω
The state that Knob is pressed is opposite to Open condition.
15
Component Test Procedure Check result Remark
7. Heater Measure resistance of the following terminal
Terminal: 1 (COM) - 2 Terminal: 1 (COM) - 3 Terminal: 2 - 3
Resistance value: 10Ω Resistance value: 10Ω Resistance value: 20Ω
Electric type
8. Thermistor Measure resistance of terminal to terminal
Temperature condition: 58°F ~ (10~40°C) 58°F ~ 104F (10~40°C)
Resistance value: 10Ω Heater case -
Hi limit
Electric type
9. Motor See Page 13
10. Gas valve
valve 1
valve 2
Measure resistance of the following terminal
Valve 1 terminal Valve 2 terminal
Resistance value: > 1.5 kΩ Resistance value: >
1.5~2.5 kΩ
Gas type
11. Igniter Measure resistance of terminal to terminal
Resistance value: 100~800Ω Gas type
12. Flame Detect Measure resistance of terminal to terminal
Open at 370°F ((Maximum) Close at 320°F
Resistance value ≒∞ Resistance value < 1Ω
Gas type
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