LG WM2140C* Service Manual
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LG WM2140C* Service Manual

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See also: Owner's Manual , User Manual and Installation Instructions

WASHING MACHINE

SERVICE MANUAL

CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
MODEL : WM2140C*

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Summary of Contents for LG WM2140C*

  • Page 1: Washing Machine

    WASHING MACHINE SERVICE MANUAL CAUTION READ THIS MANUAL CAREFULLY TO DIAGNOSE PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT. MODEL : WM2140C*...
  • Page 2 Jul. 2010 PRINTED IN KOREA P/No. : MFL30599177...

  • Page 3: Specifications

    1. SPECIFICATIONS WM2140C* ITEM COLOR W:BLUE WHITE POWER SUPPLY AC 120 V, 60 Hz PRODUCT WEIGHT 190 lbs. (86kg) ELECTRIC POWER WASHING 280 W CONSUMTION DRAIN MOTOR 80 W 42 rpm WASH REVOLUTION SPEED 0 - 1100 rpm SPIN CYCLES WASH/RINSE TEMPERATURES SPIN SPEEDS Prewash, Rinse+Spin, Quick Cycle, Stain Cycle, Tub Clean,...

  • Page 4: Features & Technical Explanation

    2. FEATURES & TECHNICAL EXPLANATION 2-1. FEATURES Direct Drive System The advanced Brushless DC motor directly drives the drum without belt and pulley. Tilted Drum and Large Door Opening Tilted drum and large opening make it possible to load and unload clothing more easily. Time-Released Dispenser Detergent, fabric softener and bleach are dispensed separately at the right time during wash cycle.

  • Page 5: Neuro Fuzzy Washing Time Optimization

    2-2. NEURO FUZZY WASHING TIME OPTIMIZATION To get the best washing performance, optimal time is determined by the water temperature, the selected washing temperature, and the size of the load. water temperature washing time the best selected NEURO- washing washing rinsing time temperature FUZZY...

  • Page 6: Child Lock

    -5. THE DOOR CAN NOT BE OPENED While program is operating ● When a power failed and power plug is taken out in operation ● While Door Lock lights turn on. ● White the motor is in the process of intertial rotating, through the operation is paused. ●...

  • Page 7: Parts Identification

    3. PARTS IDENTIFICATION ACCESSORIES Hot/Cold (1 each) Tie strap Wrench Hose for removing shipping bolts to secure drain hose to standpipe, and leveling the washer inlet hose, or laundry tub Cap (4 each) Hose retainer to cover the holes created after removing the shipping bolts...

  • Page 8: Installation And Test

    4. INSTALLATION & TEST...

  • Page 9: How To Connect The Inlet Hose

    HOW TO CONNECT THE INLET HOSE Verify that the rubber washer is inside of the valve connector. Tighten the inlet hose securely to prevent leaks. CONNECT THE DRAIN HOSE Make sure that the hose is not twisted. Avoid submerging the end of the hose. The end of the drain hose should be placed less than 96”...

  • Page 10: Test Operation

    TEST OPERATION Preparation for Press the POWER button. Press the Start/Pause washing. button. Connect the power plug to Listen for a click to determine if the outlet. the door has locked. Connect the inlet hoses. Check the water Check the automatic Check the water supply.

  • Page 11: Operation

    5. OPERATION M2140C* ■...
  • Page 12 5. OPERATION...

  • Page 13: Wiring Diagram/Program Chart

    6. WIRING DIAGRAM/PROGRAM CHART M2140C* ■...
  • Page 14 Normal Extra Rinse Cool-down Approx. (Minutes) BULKY/ LARGE PERM. PRESS DELICATES COTTON/ NORMAL HAND WASH/ WOOL SPEED WASH DRAIN+ SPIN Wash time is in minutes. The total working time will vary with the load size, water temperature and ambient temperature.

  • Page 15: Qc Test Mode

    -1. BEFORE PERFORMING SERVICE Be careful of electric shock when disconnecting parts while troubleshooting. ■ The voltage of each terminal is 120 V AC and DC when the unit is plugged in. ■ -2. QC TEST MODE. The washer must be empty and the controls must be in the off state. 1.

  • Page 16: Error Display

    7-4. ERROR DISPLAY If you press the START/PAUSE button when an error is displayed, any error except will disappear and the machine will go into the pause status. In case of if the error is not resolved within 20 sec., or the in case of other errors, if the error is not resolved within 4 min., power will be turned off automatically and the error code will blink.

  • Page 18: Error Diagnosis And Check List

    8. ERROR DIAGNOSIS AND CHECK LIST 8-1. DIAGNOSIS AND SOLUTION FOR ABNORMAL OPERATION SYMPTOM GUIDE FOR SERVICE CALL No power Is the power plug connected firmly to 120 V AC outlet? Power failure? or Breaker opened? Is the outlet controlled by a switch? Visit to service.
  • Page 19 SYMPTOM GUIDE FOR SERVICE CALL Door error Was the load too large? Visit to service. Drain trouble Visit to service.
  • Page 20 SYMPTOM GUIDE FOR SERVICE CALL Suds overflow from the Is a low-sudsing detergent used? appliance. (In this condition, wash and spin do not operate normally) LOW-SUDSING Is the proper amount of detergent used as recommended? Recommend to reduce the amount of detergent.

  • Page 21: Fault Diagnosis And Troubleshooting

    8-2. FAULT DIAGNOSIS AND TROUBLESHOOTING CAUTION 1. Be careful of electric shock if disconnecting parts while troubleshooting. 2. First of all, check the connection of each electrical terminal with the wiring diagram. 3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly. NO POWER Check the fuse or reset Is the supplied voltage 120 V AC?
  • Page 23 f it still has severe vibration and noise, regulate a specific spin speed that generates excessive vibration and noise as follows: 1) Put an unbalance part (rubber) inside of the drum. 2) Start the QC test mode (Refer to section 7-2). 3) Press Delay Wash button, then ' ' is displayed.

  • Page 24: No Water Supply

    NO WATER SUPPLY Is water supply shut-off? Is the tap opened? Open the tap. When you press both SPIN SPEED button and Check the AIR CHAMBER SOIL LEVEL button simultaneously, is the water and the tube (clogged). level frequency below 246? Is the inlet valve filter clogged? Clean the filter.

  • Page 25: Abnormal Sound

    SOFTENER/BLEACH DOES NOT FLOW IN Refer to Is water supplied? Prewash Bleach NO WATER SUPPLY Hot water Check the wiring on the Are the plugs correctly connected to the terminals of dispenser. the INLET VALVE ASSEMBLY? Main wash Put it in the correct Is softener/bleach put in the correct compartment of compartment.

  • Page 26: Heating Without Water

    HEATING WITHOUT WATER When pressing SPIN SPEED and SOIL LEVEL at the same time after draining, is the water level frequency Replace the 255? SENSOR SWITCH When pressing SPIN SPEED and SOIL LEVEL buttons ASSEMBLY. at the same time while washing, is the water level frequency between 230 - 243 ? Replace the MAIN PWB Check the voltage between two pins while pressing...

  • Page 28: Control Panel Assembly

    9. DISASSEMBLY INSTRUCTIONS Be sure to unplug the machine out of the outlet before disassembling and repairing the parts. Unscrew 2 screws on the back of the top plate. Pull the top plate backward and upward as shown. Disconnect the connectors from the Main PWB Assembly Pull out the drawer and unscrew 2 screws.
  • Page 29 Unscrew the 9 screws from the Control Panel Assembly. Disassemble the Display PWB Assembly.

  • Page 30: Switch Assembly

    Disconnect the POWER connector and SENSOR SWITCH ASSEMBLY. Remove the Protect Cover. Disassembled keeping wire. PROTECT COVER Disconnect the connectors. Unscrew 1 screw on the back. Disassemble the Main PWB.
  • Page 31 Disassemble the top plate assembly. Pull out the drawer. Push out the DISPENSER ASSEMBLY after DRAWER unscrew 2 screws. CONTROL PANEL ASSEMBLY Unscrew the nut at the lower part of the dispenser. Disassemble the 4 connectors from the valves. Wire Color Blue Housing (OR-BK) White Housing (WH-BK) Blue Housing (GY-BK)
  • Page 32 Unscrew the 3 screws from upper of the canbinet cover. Unscrew the screw from filter cover. Put a flat ( - ) screwdriver or putty knife into the both sides of the filter cover, and pull it out. Unscrew the screw from the lower side of the cabinet cover.
  • Page 33 Open the door. Disassemble the clamp assembly. Tilt the cabinet cover. Disconnect the door switch connector. NOTE: When assembling the CABINET COVER, connect the connector. Lift and separate the cabinet cover. Disassemble the clamp assembly. Disassemble the Gasket.

  • Page 34: Door Switch Assembly

    Open the door. Unscrew the 7 screws from the HINGE COVER. Put a flat ( - ) screwdriver into the openng of the hinge, and pull out the hinge cover. Unscrew a screw from the lower side of door. Disassemble the door upward. Be careful! The door is heavy.
  • Page 36 Disassemble the back cover. Remove the bolt. Pull out the Rotor. Unscrew the 2 screws from the tub bracket. Remove the 6 bolts on the stator. Unplug the 2 connectors from the stator. Disassemble the damper hinges from the tub and base.

  • Page 37: Exploded View

    10. EXPLODED VIEW 10-1. CABINET & CONTROL PANEL ASSEMB LY “The following parts are not illustrated" Description Loc No. *Owner’s Manual G001 *Energy Label G002 *Service Manual G004 F215 Printed materials *Wiring Diagram G005 *Quick Start Guides G006 A485 *Installation Sheet G007 *Non-Skid Pads G010...

  • Page 38: Drum & Tub Assembly

    10-2. DRUM & TUB ASSEMBLY K143 K360 K123 K350 K351 F140 K610 K411 K611 K410 K115 K110 K141 K111 K140 K117 K142 K572 F310 F315 K571 F465 K570 F463 K130 F464 K530 K122 K125 K510 K121 K135 K131 K105 K340 F467 F468 K520...

  • Page 39: Dispenser Assembly

    10-3. DISPENSER ASSEMBLY F323 F322 F462 F321 F300 F170 F160 F227 F226 F220 F225 F430 F441 F120 HOT (RED) A275 F130 COLD (BLUE) F432 A276...

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