LG WM8100 Service Manual
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LG WM8100 Service Manual

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WASHING MACHINE
SERVICE MANUAL
CAUTION
Before servicing the washer, Read the safety precautions in the manual.
MODEL : WM8100
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, 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.

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Summary of Contents for LG WM8100

  • Page 1 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.

  • Page 2: Table Of Contents

    11-1. Cabinet and Control Panel Assembly ....................52 11-2. Drum and Tub Assembly ........................53 11-3. Dispenser Assembly ......................... 54 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 3: Specifications

    10 steps (by sensor) LAUNDRY LOAD SENSING Incorporated ERROR DIAGNOSIS Incorporated AUTO POWER OFF Incorporated CHILD LOCK Incorporated STEAM Incorporated LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 4: Features And Technical Explanation

    2. FEATURES & TECHNICAL EXPLANATION 2-1. FEATURES LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 5: Neuro Fuzzy Washing Time Optimization

    2-2. NEURO FUZZY WASHING TIME OPTIMIZATION LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 6: The Door Can Not Be Opened

    ● The light will turn off automatically 4 minutes later. ● The drum light comes on when the washing cycle is finished and goes off 4 minutes later. LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 7: Parts Identification

    3. PARTS IDENTIFICATION NCLUED PTIONAL LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 8: Installation And Test

    4. INSTALLATION & TEST LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 9 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 10 Start/Pause Power Wash Temp. Start/Pause Spin Speed Start/Pause LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 11: Operation

    5. OPERATION 5-1. Control Panel Features WM8100 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 12 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 13 Spin Speed Soil Level LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 14: Cycle Guide

    - If the Turbo Wash™ option is on, you cannot select “No Spin” as your Spin Speed. (If the Turbo Wash™ option is off, you can select “No Spin” as your Spin Speed.) LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 15: Special Functions

    2. Open the door, add garments or remove foreign objects, and close the door. 3. Press Start Button to restart the cycle. The cycle continues automatically. LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 16: Explanation Of Each Process

    5-4. Explanation of Each Process PRE-WASH LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 18: Wiring Diagram

    6. WIRING DIAGRAM / PROGRAM CHART +HOUSING LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 19: Test Mode

    7. TEST MODE 7-1. SAFETY CAUTION SPIN SPEED SOIL LEVEL WASH/RINSE DELAY WASH LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 20: Troubleshooting

    8. TROUBLESHOOTING 8-1. SAFETY CAUTION LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 21 This adds about two hours to the cycle time. If too many suds are detected during spinning, the washing machine stops to help prevent leaking. LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 22: Troubleshooting With Error

    8-3. TROUBLESHOOTING WITH ERROR INLET VALVE ERROR LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 23 DRAIN ERROR SPIN SPEED SOIL LEVEL, WASH/RINSE DELAY WASH LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 24 HEATING ERROR LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 25 Check the connectors below. Is the connector disconnected Or disassembled? (motor drive connector.) -part of main PWB Assembly (GY4) Gray LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 26 DOOR OPEN ERROR START/PAUSE [Note] Installation check list LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 27 UNBALANCE ERROR OVER FLOW ERROR WASH/RINSE DELAY WASH [Note] Installation check list LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 28 PRESSURE SENSOR ERROR MAIN PWB LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 29: Other Troubleshooting

    3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly. NO POWER DISPLAY ASSEMBLY. Display PWB Connecting connector MAIN PWB~ Display PWB LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 30 BUTTON DOESNʼT WORK LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 31 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 32 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 33 LIQUID DETERGENT/SOFTENER/ ABNORMAL SOUND BLEACH DOES NOT FLOW IN LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 34: Component Testing Information

    9. COMPONENT TESTING INFORMATION LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 35: Door Look Switch Assembly

    9-2. DOOR LOCK SWITCH ASSEMBLY LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 36 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 37: Stator Assembly

    Result Test Points Result (Windings) (1) to (2) 5-15 Ω (2) to (3) 5-15 Ω (3) to (1) 5-15 Ω LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 38: Pump Motor Assembly

    9-4. PUMP MOTOR ASSEMBLY LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 39: Inlet Valve Assembly

    9-5. INLET VALVE ASSEMBLY LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 40: Heater Assembly

    Circuit in the MAIN PWB Wiring diagram MAIN PWB (X71) (X134) X100 MICOM Heater Tab Relay Heater driving circuit WASH HEATER LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 41: Thermistor Assembly

    9-7. THERMISTOR ASSEMBLY Circuit in the MAIN PCB / Wiring Diagram LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 42 At 140°F (60°C) 12.1 kΩ At 158°F (70°C) 8.5 kΩ 3.8 kΩ At 203°F (95°C) At 221°F (105°C) 2.8 kΩ LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 43: Disassembly Instructions

    10. DISASSEMBLY INSTRUCTIONS CONTROL PANEL LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 44 Remove the protective cover. PROTECT COVER Disconnect the connectors. Unscrew 1 screw on the back. Remove the main PWB. LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 45 DISPENSER ASSEMBLY NOISE FILTER LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 46 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 47 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 48 (Use the 13mm tool) DOOR LOCK SWITCH ASSEMBLY NOTE • Reconnect the connector after replacing the DOOR SWITCH ASSEMBLY. LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 49 • Tighten the fastening nut so the heater is secure. LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 50 Unscrew 2 screws on the back of the top plate. TOP PLATE ASSEMBLY Pull the top plate backward and upward as shown. Disconnect the connector. LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 51 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 52: Exploded View

    A140 A101 A141 A156 A390 A151 A100 A131 A130 A430 A134 A133 A440 A155 A300 A201 A310 A220 A200 A303 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 53: Drum And Tub Assembly

    F360 K340 K131 K130 K344 F365 K346 K349 F464 K345 K105 K520 K347 K550 F468 F461 K540 F145 K348 K342 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 54: Dispenser Assembly

    Inlet Valve Filter SVC F300 F180 F170 F160 F227 F340 F226 F329 F225 F430 F220 F441 F120 A275 F130 A276 F432 LGE Internal Use Only Copyright © 2016 ~ 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 55 April 2016 PRINTED IN KOREA MFL68840008...

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