LG DLE4970 E Series Service Manual
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LG DLE4970 E Series Service Manual

Electric & gas dryer
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ELECTRIC & GAS DRYER
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULL Y IN ORDER TO
PROPERL Y DIAGNOSE PROBLEMS AND TO SAFELY
PROVIDE QUALITY SER VICE ON THESE DR YERS.
MODEL : DLE4970*E DLG4971*E
U.S.A. Website: http://us.lgservice.com
Canadian Website: http://lg.ca
1

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Summary of Contents for LG DLE4970 E Series

  • Page 1 U.S.A. Website: http://us.lgservice.com Canadian Website: http://lg.ca ELECTRIC & GAS DRYER SERVICE MANUAL CAUTION READ THIS MANUAL CAREFULL Y IN ORDER TO PROPERL Y DIAGNOSE PROBLEMS AND TO SAFELY PROVIDE QUALITY SER VICE ON THESE DR YERS. MODEL : DLE4970*E DLG4971*E...
  • Page 2 IMPORTANT SAFETY NOTICE WARNING ! 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. To reduce the risk of personal injury, adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses.

  • Page 3: Table Of Contents

    CONTENTS 1. SPECIFICATIONS ....................... 4 2. FEATURES AND BENEFITS ....................6 3. INSTALLATION INSTRUCTIONS ..................6 4. DRYER CYCLE PROCESS ....................10 5. COMPONENT TESTING INFORMATION ................. 11 6. MOTOR DIAGRAM AND SCHEMATIC ................14 7. WIRING DIAGRAM ......................15 8.

  • Page 4: Specifications

    SPECIFICATIONS Name: Electric and Gas Dryer Power supply: Refer to the rating label on the dryer. Gas: 120 VAC Electric: 240VAC Size: 27 X 28.9 X 45.3 (inch) Dryer capacity: IEC 7.3 cu.ft. Weight: 127.4 (Ibs) Specifications are subject to change by manufacturer. OPTIONAL ACCESSORIES Dryer rack (1 each) Not on all models...
  • Page 5 REMARK ITEM DLE4970* DLG4971 Color Blue White Material & Top Plate Powder coating Finish Door Trim Spray 120 V / 240 V / 60 Hz (26 A) Power Elec. 120 V / 208 V / 60 Hz (23 A) Supply 120 V / 60 Hz (11.5 A) 250W (4.5A) Motor...

  • Page 6: Features And Benefits

    FEATURES AND BENEFITS COTTON/NORMAL 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 3-1 Connecting Electric Dryers Review the following options to determine Option 1: 4-wire connection with the appropriate electrical connection for a Power supply cord. your home: • 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- 4-wire receptacle wire connection.
  • Page 8 O ption 2: 3-Wire Connection with a Power Supply Cord 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.
  • Page 9 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 10: Dryer Cycle Process

    DRYER CYCLE PROCESS Default Conditions of operation and termination Cooling Wrinkle care Drying Cycle Display Temp- Temp- Default erature time Electro- Temp- Level Time Control sensor time Control** 47 5 68 4 ANTIBACTE- Very 5min 70min Saturation HIGH °F °F RIAL Normal 68 4...

  • Page 11: Component Testing Information

    COMPONENT TESTING INFORMATION CAUTION When checking the Component, be sure to turn the power off, and do voltage discharge sufficiently. Component Test Procedure Check result Remark If thermal fuse is open must • Heater case- 1. Thermal cut off Measure resistance of terminal Safety to terminal be replace...
  • Page 12 Component Test Procedure Check result Remark 7. Heater Measure resistance of the • Electric type following terminal Resistance value: 10Ω Terminal: 1 (COM) - 2 Resistance value: 10Ω Terminal: 1 (COM) - 3 Resistance value: 20Ω Terminal: 2 - 3 8.
  • Page 13 Component Test Procedure Check result Remark 13. Outlet Thermostat Measure resistance of terminal • Gas type (Auto reset) to terminal • Gas funnel Resistance value Open at 203 41°F (95 5°C Continuity < Ω Close at 159 41°F (70 5°C) •...

  • Page 14: Motor Diagram And Schematic

    MOTOR DIAGRAM AND SCHEMATIC NOTE When checking Component, be sure to turn Power off, then do voltage discharge sufficiently. Contact On / Off by Centrifugal Switch Terminal No Remark Mode Resistance Motor 2 ~ 3 Motor Heater (Electric Models) STOP Gas Valve (Gas Models) Motor 3 ~ 5...

  • Page 15: Wiring Diagram

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

  • Page 16: Flow Sensor Function

    FLOW SENSOR FUNCTION 8-1 Flow sensor This FlowSense function detects the clogging or blocking of ducts. Clogged duct vents or hoses decrease efficiency 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.

  • Page 17: Installation Check

    8-2 Installation check Once you have completed the installation of the dryer, During the three minute test cycle, monitor the use this test to make sure the condition of the exhaust Flow Sense™ display on the control panel. If no bars system is adequate for proper operation of the dryer.

  • Page 18: Troubleshooting

    8-3 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 19: Diagnostic Test

    DIAGNOSTIC TEST 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.
  • Page 20 Test 1 120V AC Electrical Supply When measuring power, be sure to wear insulated gloves, to and avoid an Caution electric shock Trouble Symptom No power was applied to controller. (LED, LCD Display off) Measurement Condition With dryer power on; connector linked to controller. •...
  • Page 21 Caution When measuring power, be sure to wear insulated gloves, to and avoid an electric shock. Trouble Symptom Check the Tab Relays Connection properly. Measurement Condition With dryer power on; connector linked to controller. 1. Power Connection : Connection of the Tab Relay with Heater (Electric) Tab Relay 1 Tab Relay 2 Heater 1 Heater 2...
  • Page 22 3. Incorrect Connection Error and Results. : Incorrect Connection of the Tab Relay and Connector Housing (Elec) PCB condition Heater1 Heater2 Items Case Of operation Operation(black) Operation(White) 1.Black and White Housing Wire CROSS Power Off Power Off 2.Black Housing Wire CROSS 3.White Housing Power On...
  • Page 23 Test 2 Thermistor Test --- Measure with Power Off 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.) During Diagnostic Test, tE1 and tE2 error occur. Trouble Symptom During operation, heater would not turn off, or remains on.

  • Page 24: Test 3 Motor Test

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

  • Page 25: Test 4 Moisture Sensor

    Test 4 Test 4 Moisture Sensor Moisture sensor Before measuring resistance, be sure to turn power off, and do voltage discharge. Caution (When discharging, contact the metal plug of power cord with ground line.) Trouble Symptom Degree of dryness does not match with dry Level. Measurement Condition Turn the dryer’s power off, then measure resistance.

  • Page 26: Test 5 Door Switch Test

    Test 5 Door Switch Test Before measuring resistance, be sure to turn power off, and do voltage discharge. Caution (When discharging, contact the metal plug of power cord with earth line.) Door opening is not sensed. (During operation, when opening door, drum motor and Trouble Symptom Heater run continuously) door close is not sensed.
  • Page 27 Test 6 Heater Switch Test - Electric Type Before measuring resistance, be sure to turn power off, and do voltage discharge. Caution (When discharging, contact the metal plug of power cord with earth line.) While operating, heating will not work. Trouble Symptom Drying time takes longer.
  • Page 28 Test 7 Test 7 GAS Valve Test - Gas Type GAS Valve test - Gas Type 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 &...
  • Page 29 Test 8 Motor Assembly, DC, Pump Before measuring resistance, be sure to turn power off, and do voltage discharge. Caution (When discharging, contact the metal plug of power cord with earth line.) During diagnostic test, E5 error occur. Trouble Symptom Turn the dryer’s power off, then measure resistance.

  • Page 30: Change Gas Setting (Natural Gas, Propane Gas)

    CHANGE GAS SETTING The dryer must be used with the correct gas. If the dryer is converted to propane (LP.) using natural gas could result in fire, explosion, or personal injury. Conversion must be done a qualified technician. The dryer is set for natural gas at the factory. A propane conversion kit is available through the parts department to licensed technicians only.
  • Page 31 VAL VE 1 IGNITER FLAME DETECT VAL VE 2...

  • Page 32: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS Disassemble and repair the unit only after pulling out power plug from the outlet. CONTROL PANEL ASSEMBLY Remove the 3 screws from the back panel. Place a towel over the top cover to prevent scratch to the surface. Gently lift each corner of the back panel, then roll it forward so it rests on top of the dryer.
  • Page 33 CONTROL PANEL Remove 8 screws from control panel assembly. Separate PCB from control panel. PANEL REAR [ELECTRIC] Remove 1 screw. Pull out the cover. Remove 3 screws. Disassemble terminal block and wire from panel rear.
  • Page 34 PANEL REAR [COMMON] Remove 3 screws remained on the panel rear. Lift out the panel rear.
  • Page 35 How to change top cover 1. Disassemble 3 screws on the control panel. 2. Disassemble the screws 2-1. Disassemble terminal block with power on the rear cover. cord. 2-2. Disassemble both side of rear cover. Steam dryer only...
  • Page 36 3. Disassemble rear panel and both side screws. 4. Disassemble PCB cover and housing from the PCB. 5. Please push the 2 spots(hooks) by using paddle between top cover and door cabinet. 6. You can open the top cover. Hooks...
  • Page 37 7. Disassemble 2 earth screws and housing on the top cover. 9. Disassemble another parts and 8. The harness has to be put in the hole. replace the cover.
  • Page 38 CABINET COVER Open the door and remove the 6 screws from the cabinet cover then close the door . Remove the 2 screws, then tilt the cabinet cover toward the front of dryer slightly . Disconnect wiring to the door switch and lift the cabinet cover .
  • Page 39 WARNING! TUB DRUM [FRONT] WHEN YOU DISASSEMBLY THE LAMP CONNECCTOR, BE SURE TO TAKE GLOVES AND CAREFUL CABINET EDGE. FAILURE TO DO SO CAN CAUSE SERIOUS INJURY. Disassemble the top plate. Remove cabinet cover. Disconnect the door lamp and electrode sensor connector.
  • Page 40 WARNING! DR YER EXHAUST CHANGE BEFORE PERFORMING THIS EXHAUST INSTALLATION, BE SURE TO DISCONNECT THE DRYER FROM ITS ELECTRICAL SUPPLY. TO REDUCE THE RISK OF PERSONAL INJURY, ADHERE TO ALL INDUSTRY RECOMMENDED SAFETY PROCEDURES INCLUDING THE USE OF LONG SLEEVED GLOVES AND SAFETY GLASSES.
  • Page 41 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 tub drum [Front ]. Remove the drum assembly. Remove 2 screws and cover (Air guide). Remove the bolt and washer.
  • Page 42 AIR DUCT Disassemble the top plate. Remove the cabinet cover . Remove the filter and 2 screws. Remove the air duct. ROLLERS Disassemble the top plate. Remove the cabinet cover and tub drum [Front ]. Remove the drum assembly and tub drum [Rear]. Disconnect the air duct from the tub drum [Front ].
  • Page 43 ※ Φ Φ Φ Φ...
  • Page 48 THE DRYER DOOR IS VERY LARGE AND HEAVY. Failure to follow the instructions below can result in damage to the dryer, property damage or personal injury. The edges of the door cover may be sharp. Take care when handling, or wear gloves to avoid injury. 1.
  • Page 49 6. Reverse the hinge and the hinge bracket at the bottom of the cabinet. Remove the two screws from the hinge bracket at bottom right and remove the hinge bracket. Remove the lower of the two screws behind the hinge bracket. Do NOT remove the upper screw behind the hinge bracket.
  • Page 51 15. Once the top lock rod has been removed, the hinge pivot can easily be removed from the hinge assembly on the upper left and set aside. Carefully lift the upper hinge assembly (on the left) out of the outer the hinge assembly 180 degrees and install it on the upper right side assembly.
  • Page 52 18. Slide the upper lock rod left and place the top right hinge pivot in the hinge assembly. When the rod is released, it should lock the hinge pivot in place. a. Remove the screw from the lower hinge bracket (on the right) and lift the hinge bracket out.
  • Page 53 22. Clean the glass on the door and door cover, if necessary. Make sure the two gray interlock buttons are properly installed and that the top and side lock rods are properly aligned where they meet. Carefully lower the door cover into place, aligning the holes in the cover with the interlock buttons on the top and the bumpers on the bottom.

  • Page 56: Exploded View

    EXPLODED VIEW 14-1 Control Panel And Plate Assembly A130 A117 A150 A140 A120 A110 A215 A570 A211 A211 A210...

  • Page 57: Cabinet And Door Assembly: Electric Type

    14-2-1 Cabinet and Door Assembly : Electric Type A700 A800 A212 A610 A212 A600 A560 A380 A390 A311 A330 A316 A315 A340 A365 A325 A500 A370 A314 A320 A360 A510 A300 A131 A310 A305 A545 A520 A540 A400 A440 A438 A441 A450 A485...

  • Page 58: Cabinet And Door Assembly: Gas Type

    14-2-2 Cabinet and Door Assembly : Gas Type A700 A800 A212 A212 A600 A380 A390 A560 A311 A330 A316 A550 A315 A365 A340 A325 A370 A320 A314 A500 A360 A300 A510 A310 A131 A305 A545 A520 A540 A400 A440 A438 A441 A450 A485...

  • Page 59: Drum And Motor Assembly: Electric Type

    14-3-1 Drum and Motor Assembly : Electric Type F200 K400 K120 K145 K100 K140 K130 K251 K250 K310 K336 K225 K335 K222 K320 K330 K221 K224 K230 K360 K250 K210 K620 K550 K560 K610 K350 K251 K540 K240 K530 K510 K520 K515 K660...

  • Page 60: Drum And Motor Assembly: Gas Type

    14-3-2 Drum and Motor Assembly : Gas Type F200 K400 K120 K145 K100 K140 K130 K251 K250 K310 K330 K225 K222 K320 K221 K224 K360 K230 K250 K210 K620 K550 K560 K610 K350 K251 K540 K240 K530 K510 K520 K651 K655 K660 K640...
  • Page 61 APR. 2016 PRINTED IN KOREA P/No.: MFL62119977...

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