LG DLE3400 Series Service Manual
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LG DLE3400 Series Service Manual

LG DLE3400 Series Service Manual

Electric & gas dryer
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ELECTRIC & GAS DRYER
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS PROPERLY AND TO PROVIDE
QUALITY SERVICE SAFELY ON THESE DRYERS.
MODEL : DLE3400* DLG3401* DLE3450*
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
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 ©
2020
LG Electronics Inc. All rights reserved. Only training and service purposes.
U.S.A. Website: http://us.lgservice.com
Canadian Website: http://lg.ca
1
CONFIDENTIAL

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  • Page 1 Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), 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.

  • Page 2: Important Safety Notice

    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 injury to persons, 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.

  • Page 3: Table Of Contents

    13-2-1. CABINET AND DOOR ASSEMBLY: ELECTRIC TYPE ........13-2-2. CABINET AND DOOR ASSEMBLY: GAS TYPE ..........13-3-1. DRUM AND MOTOR ASSEMBLY: ELECTRIC TYPE ......... 13-3-2. DRUM AND MOTOR ASSEMBLY: GAS TYPE ............ Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 4: Specifications

    SPECIFICATIONS Model DLE3400* DLG3401* DLE3450* Name Electric and Gas Dryer Power supply Please refer to the rating label regarding detailed information 27” (W) X 30” (D) X 38 / ” (H), 51” (D with door open) Size 68.6 cm (W) X 76.1 cm (D) X 98.3 cm (H), 129.7 cm (D with door open) Dryer capacity - Normal Cycle IEC 7.4 cu.ft.
  • Page 5 DLE3400* DLG3401* DLE3450*...

  • Page 6: Features And Benefits

    FEATURES AND BENEFITS DLE3400* DLG3401* DLE3450* INSTALLATION INSTRUCTIONS Dryer Rack Installation Instructions Open the door Put the dryer rack into Check and be sure that the Hold the dryer rack the drum front of the rack is properly with both hands. seated behind the lint filter.
  • Page 7 Stacking Kit Installation Instructions To ensure safe and secure installation, please observe the instructions below. WARNING 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. Do not attempt this alone! At least two people are required to lift and position the dryer on top of a washing...
  • Page 8 Pedestal Installation Instructions Place the dryer on the • • For dryer Drawer divider (1) Wrench (1) pedestal. Make sure • • the front and back feet Screws (18) † T-clips (4) †† are in the correct positions. The dryer feet will fit into the innermost positions as shown.

  • Page 9: Connecting Electric Dryers

    3-1. Connecting Electric Dryers Review the following options to determine the appropriate electrical connection for your home 4-wire receptacle 4-wire connection : Direct wire (NEMA type14-30R) Important :Grounding through the neutral conductor is prohibited for (1) new branch-circuit installations, (2) mobile homes, and (3) recreational vehicles, and Use the instructions under option 1 if your home (4) areas where local codes prohibit grounding through home has a 4-wire receptacle (NEMA type 14-30R).
  • Page 10 3-wire connection : Direct wire : 4-wire connection with a power supply cord. Important : Grounding through the neutral conductor is prohibited for (1) new branch-circuit installations, lf your local codes or ordinances do not allow the (2) mobile homes, and (3) recreational vehicles, and use of a 3 wire connection, or you are installing (4) areas where local codes prohibit grounding through your dryer in a mobile home, you must use a...
  • Page 11 : Optional 3-wire : 3-Wire connection with connection. a power supply cord • If your local codes or ordinances do not allow the lf your local codes or ordinances permit the connection of a frame-grounding conductor to the connection of a frame-grounding conductor to the neutral wire, use the instructions under this neutral wire, use these instructions.

  • Page 12: Connecting The Gas Supply

    3-2. Connecting The Gas Supply For further assistance, refer to section on Gas Requirements. 1. Make certain your dryer is equipped for use with the 3. Connect to gas supply pipe using a new flexible type of gas in your laundry room. Dryer is equipped stainless steel connector.

  • Page 13: Dryer Cycle Process

    DRYER CYCLE PROCESS DLE3400* / DLG3401* / DLE3450* Default Conditions of operation and termination Drying Cooling Wrinkle care Cycle Temp- Display erature Level time Electro- Temp- Default Temp- Time sensor Control time Control** NORMAL MEDIUM BEDDING 55 min Saturation 45± C ˚ 60±4˚C 5 min Sensor...

  • Page 14: Component Testing Information

    COMPONENT TESTING INFORMATION Auto reset -31°F (-35°C) Same shape as outlet thermostat. 4. LED Lamp Schematic: If the lamp is turned on Do not applied by connecting is normal. in DLE3400*, DLG3401*, DLE3450* Measure resistance of the following terminal 1) Door open Terminal: COM - NC (1-3) Terminal: COM - NO (1-2) 2) Door closed...
  • Page 16 Electric type 15. Inlet. valve Measure resistance of the Following terminal Do not applied in DLE3400*, Left picture DLG3401*, -.plate DLE3450*...

  • Page 17: Motor Diagram And Schematic

    MOTOR DIAGRAM AND SCHEMATIC When checking components, turn the power off and discharge voltage. NOTE Contact On / Off by Centrifugal Switch STOP MODE RUN MODE (When Motor does not operate) (Motor operates) Centrifugal switch Centrifugal switch (Pull Drive forward)

  • Page 18: Wiring Diagram

    WIRING DIAGRAM (ELECTRIC DRYER) (GAS DRYER)
  • Page 19 Main PCB Picture <Electric> <Gas>...

  • Page 20: Troubleshooting With Symptom

    Sympto heck Point 1. Not heating 1.Check Electric Wiring. 2.Check the motor operation. 3.Voltage of the Main PWB. 4. Check Heater element’s Resistance. <Electric Dryer>...
  • Page 21 <Electric Dryer> Table 1. Resistance for Thermistor Temperature.
  • Page 22 Not heating (Electric) Unplug UNIT / Check heater Check lint Filter One or both elements. Heater elements Terminal: 1(COM) – 2 = 10˜ Clean if needed. defective. Explain to owner responsibility Terminal: 1(COM) – 3 = 10˜ Terminal: 2 – 3 = 20˜ formance and safety reason.
  • Page 23 <Gas Dryer>...
  • Page 24 <Gas Dryer> Table 1. Resistance for Thermistor Temperature.
  • Page 25 Not heating (Gas) Unplug UNIT / Check gas valve Defective gas valve Check lint Filter Valve1 terminal > 1.5kˆ~2.5kˆ Clean if needed. Valve2 terminal > Explain to owner responsibility to 1.5kˆ~2.5kˆ and safety reason. Unplug UNIT / Check Igniter Defective Igniter Resistance value = 50~800ˆ...
  • Page 26 Symptom Check Point 2. Not tumbling 1.Check Electric Wiring. 2.Check the Door properly closed. 3.Voltage of the Main PWB. 4. Check Blower thermostat’s Resistance <Electric / Gas Dryer>...

  • Page 27: Flow Sensor Function

    FLOW SENSOR FUNCTION 9-1 Flow Sensor This FlowSense function detects the clogging or blocking of ducts. Clogged duct vents or hoses decrease efficiency in drying cloths. Clogged vents can also cause fire. This function alerts you to the need of cleaning the duct. When the alarm about Duct clogging is displayed, clean the duct or call a servicer to clean them.

  • Page 28: Installation Test (Exhaust Check)

    9-2. Installation Test (Duct Check) Once you have completed the installation of the Press the START/PAUSE button. dryer, use this test to make sure the condition of the The dryer will start the test, which will last a exhaust system is adequate for proper operation of few minutes.

  • Page 29: Troubleshooting For Flow Sensor Dryer

    9-3 Troubleshooting for flow sensor dryer • Check the Error Code before you call for service Error Code Possible Causes Solutions or tE2 • Temperature sensor failure • • Humidity Sensor failure. • • Electric dryer power cord is not •...

  • Page 30: Diagnostic Test

    DIAGNOSTIC TEST Wi-Fi...

  • Page 31: Test 1 120V Ac Electrical Supply

    Test 1 When measuring power, be sure to wear insulated gloves to avoid an electric shock. No power was applied to controller. Display (LCD or LED) off. Dryer power on, collector plugged in. Check the Check the outlet, is the voltage fuse or circuit 110 V ~ 125 V AC? breaker...
  • Page 32 When measuring power, be sure to wear insulated gloves to avoid an electric shock. Check the t ab relays connection properly. With dryer power on; connector linked to controller. 1. Power Connection < Table1 > : Connection of the Tap Relay with Heater (Electric) Tab Relay 1 Tab Relay 2 Heater 1 Remark...
  • Page 33 < Table 2 > : Connection of Tap Relay with PCB ASSEMBLY (Gas) Remark Color Harness Blue Wire Check the matching color between harness wire and tap relay. Black Connector Housing (Black housing – black tap relay) Black Wire Connector Housing Tap Relay 1 3.

  • Page 34: Test 2 Thermistor Test - Measure With Power Off

    Test 2 Before measuring resistance, be sure to turn the power off and discharge voltage. Caution (When discharging, contact the metal plug of power cord with the ground.) During diagnostic test, tE1 and tE2, an error occurs. Trouble Symptom During operation, the heater does not turn off. Difference between actual and sensed temperature is significant.

  • Page 35: Test 3 Motor Test

    Test 3 Before measuring resistance, be sure to turn the power off and discharge voltage. Caution (When discharging, contact the metal plug of power cord with ground wire.) Trouble Symptom Drum dose not rotate; no blower function, no heater function. Measurement Condition Turn the dryer’s power off, then measure resistance.

  • Page 36: Test 4 Moisture Sensor

    Test 4 NOTE: This test has two parts. The best test of the moisture sensing system is done in the diagnostic mode. This FUNCTIONAL TEST will test the sensor bars, wiring harness and PCB operation. If the results of this test are normal, the sensor system and PCB response are normal.

  • Page 37: Test 6 Heater Switch Test - Electric Type

    Test 5 NOTE: This test has two parts. The best test of the door switch system is done in the diagnostic mode. This FUNCTIONAL TEST will test the door switch, wiring harness and PCB operation. If the results of this test are normal, the door switch system and PCB response are normal.
  • Page 38 Test 6 Before measuring resistance, be sure to turn the power off, and do voltage discharge. (When discharging, contact the metal plug of the power cord with a ground line.) While operating, Heating will not work. Drying time takes longer. After turning the power off, measure the resistance.

  • Page 39: Test 7 Gas Valve Test - Gas Type

    Test 7 Caution When measuring power, be sure to wear insulated gloves to avoid electric shock. While operating, heating will not work. Trouble Symptom Drying time takes longer Measurement Condition With dryer power on Power on & start (Normal cycle) When measuring Valve 1 voltage, •...

  • Page 40: Test 8 Motor Assembly, Dc, Pump

    Test 8 Before measuring resistance, be sure to turn power off, and do voltage discharge. Caution (When discharging, contact the metal plug of power cord with the ground wire.) Trouble Symptom During the diagnostic test, E5 error occurs. Measurement Condition Turn the dryer’s power off, then measure resistance.

  • Page 41: Change Gas Setting (Natural Gas, Propane Gas)

    CHANGE GAS SETTING (NATURAL GAS, PROPANE GAS) Warning Initially, The burner is set for natural gas at the factory. The propane orifice Natural Gas mode is set. Propane Gas Orifice is on sale as a Service conversion kit is sold as a service part to autherized servicers only. Part to authorized servicers only.
  • Page 42 GAS VALVE FLOW START KEY PUSH VALVE 1 ON (VALVE 2 OFF) IGNITER ON IGNITER TEMPERATURE ABOUT FLAME DETECT OPEN VALVE 2 ON GAS IGNITION FLAME DETECT CLOSE DRYING VALVE 2 OFF START CLOSE OPEN GAS IGNITION...

  • Page 43: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS Unplug the dryer before servicing. WARNING ! TOP PLATE When you disassemble the top plate, be sure to disconnect the dryer from its electrical supply. Protect your hands and arms from sharp edges when working. To reduce the risk of Injury to persons adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses.

  • Page 44: Control Panel Assembly

    WARNING ! CONTROL PANEL ASSEMBLY When you disassemble the control panel, be sure to disconnect the dryer from its electrical supply. Protect your hands and arms from sharp edges when working. To reduce the risk of Injury to persons adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses.
  • Page 45 COVER CABINET WARNING ! When you disassemble the door switch connector, be sure to disconnect the dryer from its electrical supply. Protect your hands and arms from sharp edges when working. To reduce the risk of Injury to persons adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses.

  • Page 46: Drum Assembly

    WARNING ! TUB DRUM FRONT When you disassemble the lamp connector, be sure to disconnect the dryer from its electrical supply. Protect your hands and arms from sharp edges when working. To reduce the risk of Injury to persons adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses.
  • Page 47 WARNING ! DRYER EXHAUST CHANGE Before performing this exhaust installation, be sure to disconnect the dryer from its electrical supply. Protect your hands and arms from sharp edges when working inside the cabinet. To reduce the risk of Injury to persons adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses.

  • Page 48: Filter Assembly

    FILTER ASSEMBLY Remove the filter. Remove 3 screws. Remove the cover grid. Disconnect the electrode sensor. BLOWER HOUSING Disassemble the top plate. Remove the cabinet cover and front bulkhead. Remove the drum assembly. Remove 2 screws and cover (Air guide). Remove the bolt and washer.
  • Page 49 AIR DUCT AIR DUCT Disassemble the top plate. Disassemble the top plate. Remove the cover cabinet. Remove the cover cabinet. Remove the filter. Remove the filter. Remove the cover guide. Remove the cover guide. Remove 2 screws. Remove 2 screws. Remove the air duct.

  • Page 50: Exploded View

    EXPLODED VIEW 13-1. Control Panel and Plate Assembly A211 A210 A120 A140 A110...

  • Page 51: Cabinet And Door Assembly: Electric Type

    13-2-1. Cabinet and Door Assembly: Electric Type A700 A800 A570 A390 A560 A130 A610 A131 A330 A600 A305 A325 A500 A550 A320 A300 A530 A310 A520 A525 A430 A495 A540 A308 A420 A400 A460 A410 A450...

  • Page 52: Cabinet And Door Assembly: Gas Type

    13-2-2. Cabinet and Door Assembly: Gas Type A700 A800 A130 A390 A131 A330 A600 A305 A550 A325 A500 A320 A300 A530 A310 A520 A525 A430 A495 A540 A308 A420 A400 A460 A410 A450...

  • Page 53: Drum And Motor Assembly: Electric Type

    13-3-1. Drum and Motor Assembly: Electric Type K400 K120 F200 K145 K140 K100 K250 K130 K252 K251 K310 K320 K330 K340 K230 K620 K210 K250 K360 K350 K610 K560 K550 K251 K252 K336 K335 K240 K530 F150 K640 K651 K515 F140 K655 K510 K520...

  • Page 54: Drum And Motor Assembly: Gas Type

    13-3-2. Drum and Motor Assembly: Gas Type K400 F200 K120 K145 K140 K100 K130 K252 K250 K251 K320 K310 K330 K335 K340 K230 K620 K336 K210 K250 K360 K350 K610 K560 K550 K251 K252 K240 K530 K660 K651 K515 K640 K655 K510 K520 K540...
  • Page 55 Nov. 2020 PRINTED IN KOREA P/No.: MFL69290438...

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