LG DGS2028EKD User manual

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.
U.S.A Website: http://us.lgservice.com
Canadian Website: http://lg.ca
DGS2028EKD DGS2038EKD DGS1828EKD DGS1838EKD
DGS1858EKD DGS1818EKD DES2038EKD
DLE1101W DLG1102W

2
Toavoid 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.
Toreduce the risk of personal injury, adhere to all industry recommended safety procedures including the
use of long sleeved gloves and safety glasses. Failure to follow all of the safety warnings in this manual
could result in property damage, injury to persons or death.
!
WARNING !
WHAT TO DO IF YOU SMELL GAS:
IMPORTANT SAFETY NOTICE
RECONNECT ALL GROUNDING DEVICES
Do not try to lighta match, or cigarette, or turn on
any gas or electrical appliance.
Do not touch any electrical switches.Do notuse
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 cannotreach your gas supplier, call the fire
department.

3
CONTENTS
1. SPECIFICATIONS ............................................................................................................... 4
2. FEATURES AND BENEFITS .................................................................................................. 6
3. INSTALLATION INSTRUCTIONS .......................................................................................... 6
4. DRYER CYCLE PROCESS ..................................................................................................... 9
5. COMPONENT TESTING INFORMATION ............................................................................10
6. MOTOR DIAGRAM AND SCHEMATIC .............................................................................. 13
7. WIRING DIAGRAM .......................................................................................................... 14
8. FLOW SENSOR FUNCTION ............................................................................................. 15
8-1. FLOW SENSOR ...................................................................................................... 15
8-2. INSTALLATION TEST ................................................................................................ 16
8-3. TROUBLESHOOTING FOR FLOW SENSOR DRYER ................................................... 18
9. DIAGNOSTIC TEST .......................................................................................................... 19
9-1. TEST 1 120V AC ELECTRICAL SUPPLY ..................................................................... 20
9-2. TEST 2 THERMISTOR TEST - MEASURE WITH POWER OFF ....................................... 21
9-3. TEST 3 MOTOR TEST .............................................................................................. 22
9-4. TEST 4 MOISTURE SENSOR ................................................................................... 23
9-5. TEST 5 DOOR SWITCH TEST .................................................................................. 24
9-6. TEST 6 HEATER SWITCH TEST - ELECTRIC TYPE ........................................................ 25
9-7. TEST 7 GAS VALVE TEST - GAS TYPE ...................................................................... 26
9-9. TEST 8 MOTOR ASSEMBLY, DC, PUMP .................................................................... 27
10. CHANGE GAS SETTING (NATURAL GAS, PROPANE GAS) ......................................... 28
11. DISASSEMBLY INSTRUCTIONS .................................................................................... 30
12. EXPLODED VIEW............................................................................................................ 37
12-1. CONTROL PANEL AND PLATE ASSEMBLY .............................................................. 37
12-2. CABINET AND DOOR ASSEMBLY .......................................................................... 38
12-3-1. DRUM AND MOTOR ASSEMBLY: ELECTRIC TYPE ................................................. 39
12-3-2. DRUM AND MOTOR ASSEMBLY: GAS TYPE ........................................................ 40

1SPECIFICATIONS
4
Name: Electric and Gas Dryer
Power supply: Refer to the rating label on the dryer.
Gas: 120 VAC Electric: 240VAC
Specifications are subject to change by manufacturer.
Size: 27”X 403/16 ”X 29”(inch)
Dryer capacity: IEC 7.3 cu.ft.
Weight: 125.5 (Ibs)
See page 6 of this manual for usage instruction.
Dryer rack (1 each)
(Sold Separately : Some Model)
ACCESSORIES

5
Sound levels
1(on/off)
ITEM
DGS2028EKD DGS2038EKD
DGS1828EKD DGS1838EKD
DGS1858EKD DGS1818EKD
DES2038EKD
DLE1101W DLG1102W
REMARK
Blue White / Stainless Silver
White / Silver / Black
Color
ELEC.
GAS
Top Plate
Door Trim
ELECTRICITY
CONSUMPTION
MOTOR
HEATER
LAMP
GAS VALVE
CONTROL TYPE
DRUM CAPACITY
Weight (lbs) - Net
No. of Programs
No. of Dry Options
No. of Temperature Controls
Moisture
Temperature
No. of Dry Levels
Reversible Door
Drum
Child Lock
Interior Light
Product (WxHxD)
Packing (WxHxD)
Sensor
POWER
SUPPLY
Material &
Finish
Chrome
120/240V 60Hz (26A)/120/208V 60Hz (23A)
120V/60Hz (11.5A)
250W (4.5A)
5400W (22.5A)
4100W (21A)
15 W (0.2A)
13 W (0.11A) x 2
Electronic
7.3 cu.ft.
124.9/144.4
9 / 12
6
4
5
Available
Available
Available
Alcosta
Available
Available
27
” x 403/16 ” x 29 ” (inch)
29 ” x 403” x 30 ” (inch)
AC 120V
AC 240V(ELECTRIC MODEL)
AC 208V(ELECTRIC MODEL)
AC 120V
AC 120V(GAS MODEL)
Thermistor
Electrode sensor

2FEATURES AND BENEFITS
6
3INSTALLATION 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.

7
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 Section 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.
Use the instructions under option 1 if your home
homehas a 4-wire receptacle (NEMA type 14-30R).
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.
4-wire receptacle
Review the following options to determine
the appropriate electrical connection for
your home:
(NEMA type14-30R)
(NEMA type10-30R)
3-wire receptacle
Option 2: 3-Wire Connection with
a Power Supply Cord
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.
2. Connect the red and black wires to the left and
right terminal block screws.
1. Connect the neutral wire (white) of the power
cord to the center terminal block screw.
•If 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.
D
E
F
a
b
C
A
B
C

8
2
3
5
1
4
For further assistance, refer to section on Gas Requirements.
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” N.P.T. gas
connection.
Connect Gas Supply Pipe (Gas Dryer ONLY)
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 & external) for
gas leaks with a non-corrosive leak detection fluid.
5. For LP (Liquefied Petroleum) gas connection, refer
to section on Gas Requirements.
1New Stainless Steel Flexible Connector
- Use only if allowed by local codes (Use
Design A.G.A. Certified Connector)
2”NPT Pipe Plug (for checking inlet gas
pressure)
3Equipment Shut-Off Valve
-Installed within 6’(1.8 m) of dryer
4 Black Iron Pipe
Shorter than 20’ (6.1 m) – Use ” pipe
Longer than 20’ (6.1 m) – Use ” pipe
5” NPT Gas Connection
1/8
3/8
1/2
3/8

4DRYER CYCLE PROCESS
9
* Sensor dry: Dry Level is set by users.
** Manual dry: Temperature control is set by users.
Default settings can be adjusted by users.

10
5
COMPONENT TESTING INFORMATION

11
5
7. Heater Measure resistance of the
following terminal
Terminal: 1 (COM) - 2
Terminal: 1 (COM) - 3
Terminal: 2 - 3
11. Igniter Measure resistance from
terminal to terminal.
5318EL3001
Measure resistance of the
following terminal
Valve 1 terminal
Valve 2 terminal
8. Thermistor Measure resistance of terminal
to terminal
Temperature condition:
9. Motor
10. Gas valve
Resistance value: 10
Resistance value: 10
Resistance value: 20
Resistance value: 10
valve 1
valve 2
Component Test Procedure Check result Remark
Resistance value:1.5~2.5
13
Resistance value:100~800
12. Frame Detect Measure resistance of termina
to terminal
Resistance value

12
13. Outlet Thermostat
(Auto reset)
14. Outlet Thermostatt
(Manual reset)
Measure resistance of terminal
to terminal
Open at 203 7°F (95 5°C
Close at 159 9°F (70 5°C)
• Gas type
• Gas funnel
• Gas type
• Gas funnel
Measure resistance of terminal
to terminal
Open at 212 12°F
(110 7°C)
Manual reset
If thermal fuse is open must
be replaced
Resistance value
Continuity <1
Ω
•Check Top Marking:
N95
•Check Top Marking:
N110
Resistance value
Continuity <1
Ω
Component Test Procedure Check result Remark

13
6MOTOR DIAGRAM AND SCHEMATIC
NOTE
When checking Component, be sure to turn Power off, then do voltage discharge sufficiently.
■Contact On / Off by Centrifugal Switch
■.RUN MODE
(Motor operates)
■STOP MODE
(When Motor does not operate)
Motor
2 ~ 3Ω
3 ~ 5
Ω
< 1 Ω
< 1 Ω
Terminal No
Mode
Centrifugal switch Centrifugal switch
(Pull Drive forward)
Resistance
Remark
Motor
STOP
Motor
RUN
Motor
Heater (Electric Models)
Heater (Electric Models)
Gas Valve (Gas Models)
Gas Valve (Gas Models)

7WIRING DIAGRAM
14
Label all wires prior to disconnection when servicing controls. Wiring
errors can cause improper and dangrous operation. Verify proper
operation after servicing.
CAUTION
ELECTRIC DRYER WIRING DIAGRAM
GAS DRYER WIRING DIAGRAM

8FLOW SENSOR FUNCTION
15
This FlowSenseTM function detects the clogging or blocking of ducts.
Clogged duct vents or hoses decrease e fficiency in drying clothes. Clogged vents can also cause fire.
This function alarms you, when to clean the ducts.
When the alarm about duct clogging is on display of the panel, your duct vents should be cleaned by
yourself or serviceman.
8-1 Flow sensor
Flow Sensor Function

16
8-2 Installation test
Installation test (Exhaust check)
Once you have completed the installation of the dryer, use this
test to make sure the condition of the exhaust system is adequate
for proper operation of the dryer. This test should be performed
to alert you to any serious problems in the exhaust system of your
home.
Your dryer features FLOW SENSETM , an innovative sensing system
that automatically detects blockages and restrictions in dryer
ductwork. Keeping ductwork clean of lint buildup and free of
restrictions allows clothes to dry faster and reduces energy use.
To activate the Installation test:
1. Press and hold TEMP.CONTROL and OPTION buttons
at the same time. While holding these buttons, press
POWER ON/OFF
2. The dryer will show lnS in the number display to indicate that
it is in duct condition testing mode.
3. Press the START/PAUSE button.
The dryer will run for approximately 2 minutes to test for
blockages or restrictions to air flow in the ductwork.
Check the display for results.
During the two minute test cycle, monitor the FLOW SENSE
display on the control panel. If FLOW SENSE is displayed, when
the cycle ends, the exhaust system is adequate. If the exhaust
system is severely restricted, the display will show FLOW
SENSE. Other problems may also be shown with error codes.
Refer to the next page for error code details and solutions.
FLOW SENSE indicates that the exhaust system is severely
restricted. Have the system checked immediately, as performance
will be poor.
END of Cycle.
At the end of the test cycle, will display. The test cycle
will end and the dryer will shut off automatically after a short
delay.
NOTE
The dryer should be cool before starting this test. If the dryer was
warmed up during installation, run the AIR DRY cycle for a few
minutes to reduce the interior temperature.
TEMP.
CONTROL
Lighting : Restricted

17
Error Code
• Temperature sensor failure •Turn off the dryer and call for
service.
tE
• Humidity Sensor failure. •Turn off the dryer and call for
service.
HS
• House fuse is blown, circuit breaker has
tripped, or power outage has occurred.
• Check the power supply or the
connection of power cord to the
terminal block. Refer to the Connecting
Electric Dryers section of this manual
for complete instructions.
PS , PF or nP
Possible Causes Solutions
Installation test (Exhaust check) (cont.)
• Electric dryer power cord is not
connected correctly, or house power
supply is incorrect.
Check the Error Code before you call for service
• Reset circuit breaker or replace fuse.
Do not increase the fuse capacity.
If the problem is a circuit overload,
have it corrected by a qualified
electrician.
Check the duct condition
If the test displays FLOW SENSE, check the exhaust system for
restrictions and damage. Repair or replace the exhaust system as
needed.
NOTE
When the dryer is first insralled, this test should be performed to
alert you to any existing problems with the exhaust duct in your
home. However, since the test performed during normal
operation provides more accurate information on the condition
of the exhaust duct than does the installation test, FLOW SENSE
displayed during the two tests may not be the same.
Do not interrupt the test cycle, as this could result in the wrong
results.
Even if FLOW SENSE is not displayed during the test cycle, some
restrictions may still be present in the exhaust system.
Refer to the Venting the Dryer section of this manual for complete
exhaust system and venting requirements.
Restricted or blocked airflow
Avoid long runs or runs with multiple elbows or
bends.
Excess or crushed
transition duct
Too many elbows or
exhaust too long
Check for blockages and lint buildup.
Make sure the ductwork is not crushed or restricted.
Crushed or
damaged
exhaust

18
1. FLOW SENSE indicator light is on
Is lint filter full?
No
Yes
Yes
Is duct clogged?
Clean lint filter before every load
Check & clean duct.
2. FLOW SENSE indicator light is on and does not disappear.
Make sure that the ductwork is not
crushed or restricted.
Check for blockages and lint build up.
Avoid long runs of ducts or runs
with multiple elbows or bends.
*Control Panel
1.
FLOW SENSE indicator light is on even when vents have been clean and even when the vents are off.
This is Normal. After flow sensor recheck full next cycle, flow sensor is reset.
(Flow sensor bars will disappear after dryer has operated two cycle)
Bars Are Displayed but Don’t Disappear
8-3 Troubleshooting for flow sensor dryer

9DIAGNOSTIC TEST
19
ACTIVATING THE DIAGNOSTIC TEST MODE
1. UNIT must be in standby (unit plugged in, display off)
2. Press POWER while pressing MORE TIME and LESS TIME simultaneously.
3. Press START/PAUSE button to advance through diagnostics.
To check pump operation:
At the fourth press of the test mode, if the AD value of the pump is higher than 10 on the display, the pump is normal.
If it is lower than 10, E5 error will be displayed.
1.This TEST should be used for Factory test /Service test. Do not use this DIAGNOSTIC TEST other than specified.
2.Activating the Heater manually with the Door open may trip the Thermostat attached to the Heater, therefore do not
activate it manually. (Do not press the door switch to operate the heater while the door is open )
Pressing the
START/PAUSE
None
Standard
Thermistor open
Thermistor shorted
tE
Power off
OO
Motor runs
Displays Moisture Sensor Operation
If moisture sensor is contacted with
damp cloth. The display number is
below180 in normal condition
255 = Low
moisture
30 = High
moisture
1HE(Elec. Type)
1H9(Gas Type)
d-
U-
DISPLAY PGM
MAIN PGM
Current Temp.
(5~70)
Current Temp.
(5~70)
Electric control
&
Temperature sensor
ELECTRIC TYPE
Motor+Heater1(2700W)
GAS TYPE
Motor
ELECTRIC TYPE
Motor+Heater1+Heater2
(5400W)
GAS TYPE
Motor+Gas valve
Once Motor+Controller
Motor, Heater off
Loads off, Controller off
Twice
3 times
4 times
5 times
CHECKING
ACTION DISPLAY CHECKPOINT
ELECTRIC TYPE Heater 1 is
energized - 2700 W
GAS TYPE is not opened
(Temperature in the drum is
displayed in degrees C.)
ELECTRIC TYPE: Heater 1 and
heater 2 are energized - 5400 W
GAS TYPE: Gas valve is energized
(Temperature in the drum is
displayed in degrees C.)

Test 1 120V AC Electrical supply
When measuring power, be sure to wear insulated gloves, to and avoid an
electric shock
No power was applied to controller. (LED, LCD Display off)
With dryer power on; connector linked to controller.
Caution
Trouble Symptom
Measurement Condition
20
Check the outlet, is the voltage
110V ~ 125V AC?
YES
NO •Check the fuse
or circuit breaker.
Check if the voltage measured between
Connector BK2 or WH2- (Black Wire)
Linked to the Controller and WH1-
(White Wire) Is 110~125V?
YES
NO
1 12
BK2 or WH2 WH1
BK WH
•Check if Power
Cord is properly
connected.
•Reconnect the
controller.
Replace controIler.
Check if the Controller wire is
disconnected.
Check if Terminal Block and Power Cord
are connected (Check Plug ).
- Does Power Cord N neutral line match
to center terminal N neutral line?
YES
NO
L (Black) L (Red)
N (White)