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LG WM3677HW Service Manual

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WASHING MACHINE

SERVICE MANUAL

CAUTION
!
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
MODEL: WM3677HW / WD-12270RD
WD-13276RD / WD-14276RD
Website: http: //www.LGEservice.com
E-mail: http: //www.LGEservice.com/techsup.html
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  Summary of Contents for LG WM3677HW

  • Page 1: Washing Machine

    Website: http: //www.LGEservice.com E-mail: http: //www.LGEservice.com/techsup.html WASHING MACHINE SERVICE MANUAL CAUTION READ THIS MANUAL CAREFULLY TO DIAGNOSE PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT. MODEL: WM3677HW / WD-12270RD WD-13276RD / WD-14276RD...
  • Page 2 APR. 2004 PRINTED IN KOREA P/No.:3828ER3027G...
  • Page 3: Table Of Contents

    CONTENTS 1. SPECIFICATIONS ....................... 3 2. FEATURES & TECHNICAL EXPLANATION ............... 4 3. PARTS IDENTIFICATION ....................7 4. INSTALLATION & TEST ...................... 8 5. WIRING DIAGRAM/PROGRAM CHART ................11 6. OPERATION ........................13 7. TROUBLESHOOTING ...................... 15 7-1. BEFORE PERFORMING SERVICE ................15 7-2.
  • Page 4: Specifications

    1. SPECIFICATIONS ITEM WM3677HW WD-12270RD WD-13276RD / WD-14276RD COLOR BLUE WHITE TITANIUM POWER SUPPLY AC 120 V, 60 Hz AC 120-127V, 60Hz PRODUCT WEIGHT 201 lbs. (91 kg) WASHING 280 W DRAIN MOTOR 80 W ELECTRIC POWER FAN MOTOR 25 W...
  • Page 5: 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 Extra Large Door Opening The tilted drum and extra large door opening make it possible to load and unload easily.
  • Page 6: Water Level Control

    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 7: Child Lock

    2-5. 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. 2-6.
  • Page 8: Parts Identification

    3. PARTS IDENTIFICATION Water Circulation Nozzle ACCESSORIES...
  • Page 9: Installation & Test

    4. INSTALLATION & TEST Before servicing, ask the customer what the trouble is. Check the setup (power supply is 120 V AC, remove the transit bolts..). Check with the troubleshooting guide. Plan your service method by referring to the disassembly instructions. Service the unit.
  • Page 10 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 11: 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 heating Check the automatic Check the water supply.
  • Page 12: Wiring Diagram/Program Chart

    5. WIRING DIAGRAM/PROGRAM CHART...
  • Page 14: Operation

    5. OPERATION • Use this option to prev • Use this button to turn the power • This display shows: Press and hold PRE W On/Off. a) the estimated time remaining in the lock/unlock control. cycle when operating. • When Child lock is set b) an error code when an error has been buttons are disabled e detected.
  • Page 15 revent unwanted use of the washer. • These lights show which portion of the E WASH button for 3 seconds to cycle the washer is operating. • Allows the start of any cycle to be delayed for 1~12 hours. set, CHILD LOCK lights and all ed except the Power button.
  • Page 16: Troubleshooting

    7. TROUBLESHOOTING 7-1. 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. 7-2. QC TEST MODE. The washer must be empty and the controls must be in the off state. 1.
  • Page 17: 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 SYMPTOM CAUSE OVER • MAIN PWB ASSEMBLY is out of order. CURRENT • Winding in the STATOR ASSEMBLY is short-circuited. ERROR • The connector (3-pin, male, white) in the MOTOR HARNESS is not connected to the connector (3-pin, female, white) of STATOR ASSEMBLY. •...
  • Page 19: 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 20 SYMPTOM GUIDE FOR SERVICE CALL Door error Was the load too large? Visit to service. Drain trouble Visit to service.
  • Page 21 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 22: 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 VIBRATION & NOISE IN SPIN Have all the transit bolts and base packing Remove the transit bolts been removed? and Base packing. Is the washer installed on a solidly constructed Move the washer or floor? reinforce the floor. Check if the washer is perfectly level as follows: Check the leveling of the washer with a Level and check that the washer is stable.
  • Page 24 If 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 ‘...
  • Page 25: 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 26: Abnormal Sound

    LIQUID DETERGENT/SOFTENER/BLEACH DOES NOT FLOW IN Refer to Is water supplied? NO WATER SUPPLY Check the wiring on the Are the plugs correctly connected to the terminals of dispenser. the INLET VALVE ASSEMBLY? Put it in the correct Is liquid detergent/softener/bleach put in the correct compartment.
  • Page 27: 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 WASH HEATER TROUBLE HEATING CONTINUOUSLY ABOVE THE SETTING WATER TEMPERATURE Extra Hot: 70 °C Push the THERMISTOR When checking the THERMISTOR on the tub, tightly to the rubber. is the THERMISTOR loose?
  • Page 29: Will Not Circulate Water

    WILL NOT CIRCULATE WATER Is the impeller of the drain pump clogged? Remove foreign material. Hose Connector Hose (White) Remove foreign material. Are the Hose Connector and/or Hose clogged? Reconnect or repair Is the connector disconnected, disassembled? the connector. Connector Connector Is the coil of the right side of drain pump open Replace PUMP MOTOR...
  • Page 30: Spin Trouble

    SPIN TROUBLE Check the SENSOR SWITCH ASSEMBLY or HOSE (Pressure). Check during spin if the frequency of the water If the problem is on the SENSOR level is 248 or more. SWITCH ASSEMBLY or the HOSE, replace the SENSOR SWITCH ASSEMBLY or the HOSE.
  • Page 31 ERROR DISPLAY Dry duct Replace the thermistor. Is the resistance of thermistors on dry duct 6322FR2046C : 2.5kΩ ~180kΩ (at 100°C ~0°C). Dry Duct Condensing duct Thermistor CHECK FOR DRY HEATER TROUBLE Condensing bellows CHECK FOR DRY FAN MOTOR TROUBLE Disassemble the cabinet cover and condensing bellows.
  • Page 33: Disassembly Instructions

    9. DISASSEMBLY INSTRUCTIONS Be sure to unplug the machine out of the outlet before disassembling and repairing the parts. TOP PLATE ASSEMBLY Unscrew 2 screws on the back of the top plate. Pull the top plate backward and upward as shown. Disconnect the Display PWB Assembly connector from Trans cable.
  • Page 34 Disconnect the POWER connector and SENSOR SWITCH ASSEMBLY. Remove the Protect Cover. CONNECTOR PROTECT COVER Disconnect the connectors. Unscrew 1 screw on the back. Disassemble the Main PWB.
  • Page 35 Disassemble the top plate assembly. Pull out the drawer. Push out the DISPENSER ASSEMBLY after unscrew 2 screws. Unscrew the nut at the lower part of the dispenser. Disassemble the 4 connectors from the valves. Wire Color Blue Housing (YL-BK) White Housing (WH-BK) Blue Housing (GY-BK) Red Housing (BL-BK)
  • Page 36 Unscrew the 4 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 37 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 38 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 39 Disassemble the cabinet cover. Separate the pump hose, the bellows and the circulation hose assembly from the pump assembly. Disassemble the pump assembly in arrow direction. Disassemble the cabinet cover. Separate 2 connectors from the heater. Loosen the nut and pull out the heater. CAUTION •...
  • Page 40 Disassemble the cabinet cover. Separate the heater from the tub. Remove any foreign objects (wire, coin, etc.) by inserting a long bar in the opening. Unscrew the 4 screws from the back cover. Unscrew the single screw from the lower-right side of the cabinet.
  • Page 41 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 42: Exploded View

    10. EXPLODED VIEW 10-1. CABINET & CONTROL PANEL ASSEMBLY F215 A485 F210 F110 A455 A450 A105 A104 A102 A103 A110 A111 A410 A490 A150 A154 A495 A152 A101 A141 A153 A151 A100 A131 A130 A430 A140 A133 A440 A155 A300 A310 A201 A220...
  • Page 43: Drum & Tub Assembly

    10-2. DRUM & TUB ASSEMBLY K351 K350 K360 K143 K123 F140 K610 K411 K420 K611 K115 F466 K110 K141 K111 K140 F315 K572 F310 K571 F465 K570 F463 K122 F464 K511 K125 K130 K320 K530 K121 K510 K124 K512 K560 K105 K135 K131...
  • Page 44: Dispenser Assembly

    10-3.DISPENSER ASSEMBLY F323 F322 F462 F321 F300 F170 F160 F227 F226 F225 F430 F220 F441 F120 HOT (RED) A275 F130 COLD (BLUE) A276 F432...
  • Page 45: Dryer

    10-4.DRYER M111 M110 M120 M100 M121 M210 M230 M215 K311 M240 M130 M101 K311 M220 M312 M310 M311 M260 M235...