LG DLEX4370 Series User manual

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MODEL : Electric
DLEX4370*
Gas
DLGX4371*
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modication, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless
you have obtained the prior written consent of the LG Electronics entity from which you received this Service
Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this
Service Manual.
Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONFIDENTIAL

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1. SPECIFICATIONS .................................................................................................................. 4
2. FEATURES AND BENEFITS ................................................................................................... 6
3. INSTALLATION INSTRUCTIONS............................................................................................ 6
4. DRYER CYCLE PROCESS.................................................................................................... 11
5. COMPONENT TESTING INFORMATION ............................................................................. 12
6. MOTOR DIAGRAM AND SCHEMATIC................................................................................. 15
7. WIRING DIAGRAM............................................................................................................... 16
8. STEAM FUNTION ................................................................................................................. 18
8-1. STEAM CYCLE GUIDE.................................................................................................. 18
8-2. TROUBLESHOOTING .................................................................................................. 19
8-3. DISPLAY FAULT/ERROR CODES ................................................................................. 20
8-4. TROUBLESHOOTING WITH SYMPTOM....................................................................... 22
9. FLOW SENSOR FUNCTION................................................................................................. 29
9-1. FLOWSENSOR.............................................................................................................. 29
9-2. INSTALLATION CHECK................................................................................................ 30
9-3. TROUBLESHOOTING FOR FLOW SENSOR DRYER.................................................... 31
10. DIAGNOSTIC TEST ............................................................................................................ 32
10-1 TEST 1 120V AC ELECTRICAL SUPPLY...................................................................... 33
10-2. TEST 2 THERMISTOR TSET – MEASURE WITH POWER OFF.................................... 36
10-3. TEST 3 MOTOR TEST.................................................................................................. 37
10-4. TEST 4 MOISTURE SENSOR ...................................................................................... 38
10-5. TEST 5 DOOR SWITCH TEST ..................................................................................... 39
10-6. TEST 6 HEATER SWITCH TEST – ELECTRIC TYPE.................................................... 40
10-7. TEST 7 GAS VALVE TEST – GAS TYPE ...................................................................... 41
10-8. TEST 8 MOTOR ASSEMBLY, DC, PUMP .................................................................... 42
11. CHANGE GAS SETTING (NATURAL GAS, PROPANE GAS)............................................. 43
12. DISASSEMBLY INSTRUCTIONS ........................................................................................ 45
13. EXPLODED VIEW ............................................................................................................... 56
13-1. CONTROL PANEL AND PLATE ASSEMBLY............................................................... 56
13-2-1. CABINET AND DOOR ASSEMBLY: ELECTRIC TYPE ............................................ 57
13-2-2. CABINET AND DOOR ASSEMBLY: GAS TYPE ....................................................... 58
13-3-1. DRUM AND MOTOR ASSEMBLY: ELECTRIC TYPE................................................ 59
13-3-2. DRUM AND MOTOR ASSEMBLY: GAS TYPE ......................................................... 60
Copyright © 2016 - 2017 LG Electronics Inc. All
rights reserved. Only training and service purposes.

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ACCESSORIES
■Name : Electric and Gas Dryer
■Power supply : Refer to the rating label on the dryer.
Gas : 120 VAC Electric: 240VAC
■Size : 27 X 30 X 38 11/16 (inch)
■Dryer capacity : Normal Cycle IEC 7.4 cu.ft. (225 lb/10.2 kg)
Steam Cycle IEC 7.4 cu.ft. (8 lb/3.6 kg)
■Weight : Gas : 140.2lbs (63.6kg)
Electric : 138.2 lbs (62.7 kg)
Specifications are subject to change by manufacturer.
See page 6 of this manual for usage instruction.
Dryer rack (1 each)
Y connector Hose
Included accessories Optional accessory

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DLEX4370* DLGX4371*
7.4cu.ft
Powder coating
Blue White / Stainless Silver / Black STS
Chrome
120 V/ 60 Hz (11.5 A)
1.12W(0.08A)
10
High / Low / Off
Stainless
27 X 30 X 38 11/16 (inch)
29 1/2 X 30 3/4 X 44 3/4 (inch)
140.2 / 138.2

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2FEATURES AND BENEFITS
3INSTALLATION INSTRUCTIONS
Dryer Rack 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.
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3-1. Connecting Electric Dryers
If this type is available at your home. you will be
connecting to a fused disconnect or circuit breaker
box
If this type is available at your home. you will be
connecting to a fused disconnect or circuit breaker
box
3-wire direct
4-wire direct
5"
(12.7 cm)
1"
(2.5 cm)
5"
(12.7 cm)

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3-2 Connecting the gas supply

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21.8 150~800
800
Connect Inlet Hose

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Auto reset -31°F (-35°C)
Same shape as outlet thermostat.
4. LED Lamp Schematic: If the lamp is turned on
by connecting is normal.
It is not
measured by
multimeter
because V is
3.2V
th
Measure resistance of the
following terminal
1) Door open
Terminal: COM - NC (1-3)
Terminal: COM - NO (1-2)
2) Door closed
Terminal: COM - NC (1-3)
Terminal: COM - NO (1-2)

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Ω
Ω
Electric type
15. Inlet. valve Measure resistance of the
Following terminal
Left picture
-.plate

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Ω
Ω
Ω
Ω
When checking Component, be sure to turn Power off, then do voltage discharge sufficiently.
m

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Heater Relay(Black)
Heater Relay(Blue)
AG Heater Relay(White)
YL3
WH4
BL2
NA7
NA6
NA4

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Heater Relay(Black)
Heater Relay(Blue)
YL3
WH4
BL2
NA7
NA6
NA4
BL3

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TurboSteam™ helps prevent the overdrying of clothes by injecting steam
during the drying process. The Steam Shield Function extends the life of clothes.
s
STEAM DEFAULT TIME TEMP.
CONTROL
DRY
LEVEL
FABRIC
STATE FABRIC TYPE MAXIMUM AMOUNT
STEAM
SANITARY™
STEAM
SANITARY™
(39 minutes)
Dry
Comforter
Bedding Single (1 each)
Children's clothing 3 lbs.
STEAM
FRESH™
STEAM FRESH™
(20 minutes) O Dry comforter Single (1 each)
Shirts* 5 each
+
REDUCE
STATIC
STEAM FREASH™
(10 minutes) Dry Shirts* 8 lbs. (18 Items.)
+
EASY
IRON
STEAM FRESH™
(12 minutes) Dry Shirts* Shirts* (5 each)
STEAM
OPTION
+
REDUCE
STATIC
HEAVY DUTY
COTTON/TOWELS
NOMAL
PERM. PRESS
DELICATES
O Wet Varies by
selected cycle
8 lbs.
(18 Items.)
+
EASY
IRON
O Wet Varies by
selected cycle Shirts* (5 each)
TIME
DRY
+
REDUCE
STATIC
TIME DRY
(45 minutes) O Wet Varies by selected
8 lbs.
(18 Items.)
+
EASY
IRON
TIME DRY
(47 minutes) O Wet Varies by selected Shirts* (5 each)

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tE1 Thermistor of blower
housingOutlet thermistor open or shorted. 1 error is displayed in the drying cycle or test mode.
tE2 Thermistor of blower
housingOutlet thermistor open or shorted. 2 error is displayed in the drying cycle or test mode.
tE4 Thermistor of steam
generator
Steam generator thermistor open
or shorted.
4 error is only displayed in the
test mode.
place the steam generator.
dE Door SW Door SW is abnormal. (only TEST
MODE)
dE error is only displayed in the
test mode.
E5 Water supply pump When the pump valve is less than
10 in the test mode
5 error is only displayed in the test
mode.
Check the connection between
harness wire and connector.
place the water supply pump.
PS Wire Connection
(Black-Whi )
Wire Connection is wrong.
Wire Connection is loose.
rify proper connection of the
power cord. (Electric dryer only.)
* PS means power supply.
EE EE OM ErrorEE OM operation is adnormal.EE error is displayed only in the
test mode
nC NFC module
NFCmodule
NFC module open or shorte nC is displayed only in the test mode
nU is displayed only in the test mode
NFC module is wrong
•MORE TIME pressed.
• Pressing the MORE TIME button adjusts the
load size from 1to 5 articles or a big load
indicated by in the display.
The display shows: