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LG WM2455H Series Service Manual

Washing machine
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WASHING MACHINE

SERVICE MANUAL

CAUTION
!
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
MODEL: WM2455H*
Website: http: //www.LGEservice.com
E-mail: http: //www.LGEservice.com/techsup.html
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  Summary of Contents for LG WM2455H Series

  • 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: WM2455H*...
  • Page 2 MAR. 2007 PRINTED IN KOREA P/No.: MFL30599107...
  • Page 3: Table Of Contents

    CONTENTS 1. SPECIFICATIONS .........................3 2. FEATURES & TECHNICAL EXPLANATION ................4 3. PARTS IDENTIFICATION ......................7 4. INSTALLATION & TEST ....................... 8 5. OPERATION ..........................11 6. WIRING DIAGRAM/PROGRAM CHART ..................14 7. TROUBLESHOOTING.........................15 7-1. BEFORE PERFORMING SERVICE ...................15 7-2. QC TEST MODE.........................15 7-3.
  • Page 4: Specifications

    1. SPECIFICATIONS ITEM WM2455H* COLOR W:BLUE WHITE, G:PEARLY GRAY POWER SUPPLY AC 120 V, 60 Hz PRODUCT WEIGHT 192 lbs (87kg) WASHING 280 W ELECTRIC POWER DRAIN MOTOR 80 W CONSUMTION WASH HEATER 1000 W WASH 46 rpm REVOLUTION SPEED SPIN 0-1200 rpm CYCLES...
  • Page 5: Features & Technical Explanation

    2. FEATURES & TECHNICAL EXPLANATION 2-1. FEATURES Ultra Capacity The Larger drum enables not just higher head drop and stronger centrifugal force, but also less tangling and wrinkling of the laundry. Heavier loads, such as king size comforters, blankets, and curtains, can be washed. Direct Drive System The advanced Brushless DC motor directly drives the drum without...
  • 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. While the motor is in the process of intertial rotating, through the operation is paused. 2-6.
  • Page 8: Parts Identification

    3. PARTS IDENTIFICATION Drum Light Door Seal ACCESSORIES Hot/Cold (1 each) Tie strap Wrench for removing shipping bolts Hose 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 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 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: Operation

    5. OPERATION I WM2544H*...
  • Page 13 5. OPERATION Delay Wash, CUSTOM PROGRAM EST. TIME REMAINING • Delay Wash allows the start of any cycle to be delayed for 1~19 hours. • This display shows: • CUSTOM PROGRAM allows you to store a customized wash cycle a) the estimated time remaining for future use.
  • Page 14: Wiring Diagram/Program Chart

    6. WIRING DIAGRAM PROGRAM CHART DISPLAY PWB DISPLAY PWB 2 3 4 5 7 8 9 10 2 3 4 5 2 3 4 5 2 3 4 5 2 3 4 5 2 3 4 5 MAIN PWB 1 2 3 4 5 6 1 2 3 1 2 3 4 1 2 3 4 5 6...
  • Page 15: 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 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 17 ERROR SYMPTOM CAUSE • The connector (3-pin, male, white) in the MOTOR HARNESS is not connected to the connector (3-pin, female, white) of STATOR ASSEMBLY. • The electric contact between the connectors (3-pin, male, white) in the MOTOR HARNESS LOCKED and 4-pin, female, white connector in the MAIN PWB MOTOR ASSEMBLY is bad or unstable.
  • 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 HE (High Efficiency) detergent used? appliance. (In this condition, wash and spin do not operate normally) 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 22 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: Base Packing Level Check the leveling of the washer with a Level...
  • Page 23: No Water Supply

    NO WATER SUPPLY Is water supply shut-off? Is the tap opened? Open the tap. When you press both CUSTOM PROGRAM Check the AIR CHAMBER button and PRE-WASH button simultaneously, is and the tube (clogged). the water level frequency below 246? Is the inlet valve filter clogged? Clean the filter.
  • Page 24: Abnormal Sound

    LIQUID DETERGENT/SOFTENER/BLEACH DOES NOT FLOW IN Prewash Refer to Is water supplied? Bleach Hot water NO WATER SUPPLY 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 liquid detergent/softener/bleach put in the correct compartment.
  • Page 25: Heating Without Water

    HEATING WITHOUT WATER When pressing CUSTOM PROGRAM and PRE-WASH at the same time after draining, is the water level Replace the frequency 255? SENSOR SWITCH When pressing WASH/RINSE and DELAY WASH ASSEMBLY. buttons 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 26 WASH HEATER TROUBLE Blue Black Yellow Replace the Heater Assembly HEATING CONTINUOUSLY ABOVE THE SETTING WATER TEMPERATURE CUSTOM PROGRAM and WASH/RINSE button Extra Hot: 70 °C Water Temperature [°C] When checking the THERMISTOR on the tub, Push the THERMISTOR is the THERMISTOR loose? tightly to the rubber.
  • Page 27: 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 28: 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 29 Disconnect the SENSOR SWITCH ASSEMBLY. Remove the Protect Cover. PROTECT COVER Disconnect the connectors. Unscrew 1 screw on the back. Disassemble the Main PWB.
  • Page 30 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 31 Unscrew the 5 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 32 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 33 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 34 Disassemble the cabinet cover. Separate the pump hose, and the bellows. 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 • When assembling the heater, insert the heater into the heater clip on the bottom of the tub.
  • Page 35 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 36: Exploded View

    10. EXPLODED VIEW 10-1. CABINET & CONTROL PANEL ASSEMBLY F215 A485 F210 F110 A455 A450 A104 A105 A106 A102 A111 A110 A103 A410 A150 A154 A152 A101 A151 A153 A100 A131 A130 A430 A140 A142 A133 A440 A155 A300 A310 A201 A220 A200...
  • Page 37: Drum & Tub Assembly

    10-2. DRUM & TUB ASSEMBLY K143 K123 K350 K360 K351 F140 K610 K411 K410 K611 K115 F466 K110 K111 K140 F315 F465 F463 K513 K122 F464 K125 K530 K130 K320 K530 K310 K121 K510 K311 K135 K131 F328 K342 F467 K340 K520 F468...
  • Page 38: Dispenser Assembly

    10-3. DISPENSER ASSEMBLY F322 F323 F462 F321 F300 F170 F160 F227 F226 F225 F436 F430 F220 F431 F441 F440 F435 F120 HOT (RED) A275 F130 COLD (BLUE) A276 F432...