LG WM2501H A Series Service Manual
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LG WM2501H A Series Service Manual

LG WM2501H A Series Service Manual

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This Owner's Manual is provided and hosted by Appliance Factory Parts.
LG WM2501HVA
Owner's Manual
Shop genuine replacement parts for LG WM2501HVA
Find Your LG Washer Parts - Select From 393 Models
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Summary of Contents for LG WM2501H A Series

  • Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. LG WM2501HVA Owner's Manual Shop genuine replacement parts for LG WM2501HVA Find Your LG Washer Parts - Select From 393 Models -------- Manual continues below --------...
  • Page 2 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: WM2501H*A...
  • Page 3 July. 2009 PRINTED IN KOREA P/No.: MFL30599142...

  • Page 4: Table Of Contents

    CONTENTS 1. SPECIFICATIONS ....................... 3 2. FEATURES AND TECHNICAL EXPLANATION ..............4 3. PARTS IDENTIFICATION ....................7 4. INSTALLATION AND TEST ....................8 5. OPERATION ........................11 5-1. CONTROL PANEL FEATURES ................. 11 5-2. CYCLE GUIDE ......................13 5-3. SPECIAL FUNCTIONS ....................14 5-4.

  • Page 5: Specifications

    1. SPECIFICATIONS ITEM WM2501H*A COLOR W:BLUE WHITE, V:STAINLESS SILVER, R:CANDY APPLE RED 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...

  • Page 6: Features And Technical Explanation

    2. FEATURES & TECHNICAL EXPLANATION 2-1. FEATURES ■ Ultra Capacity The Larger drum enables not just higher head drop and stronger 淡Ъ肢艇? 情捷? centrifugal force, but also less tangling and wrinkling of the laundry. Heavier loads, such as king size comforters, blankets, and curtains, can be washed.
  • Page 7 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 8 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 9: Parts Identification

    3. PARTS IDENTIFICATION Drum Light Door Seal ACCESSORIES Tie strap (Option) Hot/Cold (1 each) Wrench to secure drain hose to standpipe, Hose inlet hose, or laundry tub Caps(4) Elbow Bracket Non-skid pads (for securing drain hose) (for covering shipping bolt holes)

  • Page 10: Installation And Test

    4. INSTALLATION & TEST Before servicing, ask the customer what the trouble is. Check the setup (power supply is 120V, remove the transit bolts, level the washer...) Check with the troubleshooting guide. Plan your service method by referring to the disassembly instructions. Service the unit.
  • Page 11 ■ 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. ·...
  • Page 12 TEST OPERATION Press the POWER button. Press the Start/Pause Preparation for washing. button. • Connect the power plug to • Listen for a click to determine if the outlet. the door has locked. • Connect the inlet hose. Check the water heating Check the automatic Check the water supply.

  • Page 13: Operation

    5. OPERATION 5-1. CONTROL PANEL FEATURES WM2501H*A...
  • Page 14 , , C C U U S S T T O O M M P P R R O O G G R R A A M M E E S S T T . . T T I I M M E E R R E E M M A A I I N N I I N N G G STEAM STEAM •...

  • Page 15: Cycle Guide

    5-2. CYCLE GUIDE The cycle guide below shows the options and recommended fabric types for each cycle. NOTE: To protect your garments, not every wash/rinse temperature, spin speed, soil level, or option is available with every cycle.

  • Page 16: Special Functions

    5-3. SPECIAL FUNCTIONS The option buttons also activate special functions, including CHILD LOCK, LOAD SIZE, TUB CLEAN, and SPIN SENSE. Press and hold the option button marked with the special function for 3 seconds to activate. CHILD LOCK Use this option to prevent unwanted use of the washer or to keep cycle settings from being changed while the washer is operating.

  • Page 17: Explanation Of Each Process

    5-4. EXPLANATION OF EACH PROCESS Process Explanation Stay • Electrical power is supplied • Washer is ready to work and the micom is in the active mode. Water • After loading laundry and selecting a course and a cycle, water is supply supplied and drum rotates.
  • Page 18 Process Explanation Intermittent • To reach the correct set speed, the motor rotates clockwise and spin counterclockwise directions after spin process starts. • If the water level frequency is lower than 23.0 kHz, a washer senses suds and starts suds removal process. Rinse •...

  • Page 19: Wiring Diagram/Program Chart

    6. WIRING DIAGRAM/PROGRAM CHART...

  • Page 21: Test Mode

    7. TEST MODE 7-1. SAFETY CAUTION There's built-in AC 120V and DC power in output terminal of PWB assembly in common. Be careful electric shock when disconnecting parts while trouble shooting. (Wear Electro Static Discharge gloves when working.) After cutting off the power when changing PWB assembly, disconnect or assemble. Be careful static when handling PWB assembly, and use Electro Static Discharge plastic pack when delivering or keeping it.

  • Page 22: Troubleshooting

    8. TROUBLESHOOTING 8-1. SAFETY CAUTION There’s built-in AC 120V and DC power in output terminal of PWB assembly in common. Be careful electric shock when disconnecting parts while trouble shooting. (Wear Electro Static Discharge gloves when working.) After cutting off the power when changing PWB assembly, disconnect or assemble. Be careful static when handling PWB assembly, and use Electro Static Discharge plastic pack when delivering or keeping it.
  • Page 23 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. LOCKED • The electric contact between the connectors (3-pin, male, MOTOR white) in the MOTOR HARNESS and 4-pin, female, white ERROR connector in the MAIN PWB ASSEMBLY is bad or unstable.

  • Page 24: Troubleshooting Summary

    8-3. TROUBLESHOOTING SUMMARY...

  • Page 25: Troubleshooting With Error

    8-4. TROUBLESHOOTING WITH ERROR INLET VALVE ERROR Replace the Is the voltage of the inlet INLET VALVE valve connector 120 V AC? ASSEMBLY. (Check the all terminal of INLET VALVE ASSEMBLY displayed? while the power is on.) Check the AIR When you press both CHAMBER STEAN button and...
  • Page 26 DRAIN ERROR DRAIN ERROR displayed? Is the coil of the drain Replace the Reconnect or Is the connector connected pump too high or low? DRAIN repair to pump motor assembly (resistance of the coil PUMP the connector. disconnected or is 10-20 Ω) ASSEMBLY.
  • Page 27 HEATING ERROR HEATING ERROR Reconnect or Is the connector connected to repair thermistor disconnected or the connector disassembled? displayed? Reconnect or Is the connector connected repair to heater disconnected or the connector disassembled? Steam generator thermistor Steam generator heater Wash thermistor Replace the Is thermistor resistance THERMISTOR...
  • Page 28 - part of motor LOCKED MOTOR ERROR displayed? Reconnect Check the connectors below. Motor the connector. Is the connector disconnected (connector / or disassembled? wire / motor) (motor hall sensor connector, Replace Is rotor magnet cracked? motor drive connector) the ROTOR - part of main PWB assembly (RD4, NA1) Magnet...
  • Page 29 DOOR OPEN ERROR Replace the Is there clicking sound once displayed? or twice when the ASSEMBLY. START/PAUSE button is pressed to start the cycle? Reconnect or Is the connector connected repair to door switch or main PWB Replace the the connector Is DOOR SWITCH disconnected? DOOR...
  • Page 30 UNBALANCE ERROR OVER FLOW ERROR displayed? displayed? When you press both Check the AIR Put laundry Does the laundry lean STEAM button and CHAMBER evenly toward one side, not evenly PRE-WASH button and the tube In the DRUM put in the DRUM assembly? simultaneously, is the (clogged).
  • Page 31 PRESSURE SENSOR ERROR displayed? Reconnect or Is the connector connected repair to pressure sensor the connector disconnected or disassembled? Replace the Is the resistance of the pressure pressure sensor out of switch range? (pin 1~ pin 3) (21~23 Ω ±10%) Fix the air Is the AIR CHAMBER and chamber...

  • Page 32: Troubleshooting Else

    8-5. TROUBLESHOOTING ELSE 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 Replace the Is LED on while the power...
  • Page 33 BUTTON DOESN’T WORK Reconnect or Is the connector connected Repair to Main PWB / Display the connector PWB disconnected or disassembled? Replace the Is the display PCB broken? DISPLAY (check the buzzer sound and LED light while push ASSEMBLY the button.) Repair the Is the button of panel stuck? button...
  • Page 34 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 35 DETERGENT DOES NOT FLOW IN Refer to Is water supplied? NO WATER SUPPLY Are receptacles correctly connected to the Check the wiring. terminals of the INLET VALVE ASSEMBLY? Put the detergent in the correct place. Has detergent been put in the correct compartment of the dispenser? Is the detergent caked or hardened? Clean the dispenser.
  • Page 36 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 37: Component Testing Information

    9. COMPONENT TESTING INFORMATION WARNING When Resistance (Ohm) checking the Component, be sure to turn the power off, and do voltage discharge sufficiently. 9-1. FILTER ASSEMBLY (LINE FILTER) Wiring Circuit in the MAIN PWB / Wiring Diagram diagram RI CI MAIN PWB ASSEMBLY Test...

  • Page 38: Door Look Switch Assembly

    9-2. DOOR LOCK SWITCH ASSEMBLY Wiring Circuit in the MAIN PWB / Wiring Diagram diagram MAIN PWB MICOM Relay Relay Common terminal of Valve Door switch The Door Lock Switch Assembly consists of a Heating PTC, a Bimetal, Function a Protection PTC, and a Solenoid. It locks the door during a wash cycle. 1.
  • Page 39 Test points Result Test Points Result Remarks 700-1500 Ω (2) to (4) At 77 °F °C 60-90 Ω (3) to (4) At 77 °F °C (4) to (5) Infinity (2) to (4) 120 Vac Voltage Input...

  • Page 40: Stator Assembly

    9-3. STATOR ASSEMBLY Wiring Circuit in the MAIN PWB / Wiring Diagram diagram MAIN PWB NA1NA MICOM Function The DD motor can be driven from stopped to maximum speed in infinite steps in either direction. There are 36 poles on the stator; 12 permanent magnets spaced around the rotor. There are no brushes to wear out.
  • Page 41 The hall sensor determines the speed and direction of the motor. It also can read that the load is off balance when the drum speed fluctuates. Test point - Voltage Testing Hall Sensor at Stator Result (Hall Sensor) (2) (4) (1) (3) (5) If measuring voltage from the Main PCB Assembly to the Hall Sensor, use the following steps:...
  • Page 42 7. To measure output signal voltage from the hall sensor, carefully move test leads to terminals 1 to 4, blue and gray. Slowly rotate motor rotor by hand. You should read a pulsing 10 Vdc. If 10 Vdc is measured from 1 to 4, move lead on blue wire to red wire, terminal 2.

  • Page 43: Pump Motor Assembly

    9-4. PUMP MOTOR ASSEMBLY Wiring Circuit in the MAIN PWB Wiring Diagram diagram MAIN PWB 1 2 3 1 2 3 1 2 3 4 1 2 3 MICOM 3 2 1 3 2 1 CONNECTOR Pump Driving circuit DRAIN CIRCULATION PUMP PUMP...

  • Page 44: Inlet Valve Assembly

    9-5. INLET VALVE ASSEMBLY Wiring Circuit in the MAIN PWB diagram MICOM CONNECTOR Inlet valve driving circuit INLET VALVE Wiring Diagram MIAN PWB COMMON GY YL (BK) MAIN BLEACH WASH VALVE WASH VALVE INLET VALVE * Each circuits of loads in wiring diagram are all same. Depending on the cycle and water temperature, the controller will energize the hot or Function cold water valve solenoids to meet the selected water temperature.

  • Page 45: Heater Assembly

    9-6. HEATER ASSEMBLY Wiring Circuit in the MAIN PWB Wiring diagram diagram MAIN PWB MICOM Heater Tab Relay STEAM Heater driving circuit WASH GENERATOR HEATER HEATER * Each circuits of loads in wiring diagram are all same. 1. The Wash Heater is designed to raise the wash water to the desired temperature Function selection during certain wash cycles.

  • Page 46: Thermistor Assembly

    9-7. THERMISTOR ASSEMBLY Wiring Circuit in the MAIN PWB / Wiring Diagram diagram MAIN PWB MICOM WASH THERMISTOR The thermistor (temperature sensor) is used to monitor water temperature in the tub Function or Steam Generator. Test Test Result Remarks points Points (tolerance ±5%) &...
  • Page 47 Result Wash Thermistor Test Points Result Remarks (tolerance ±5%) (1) to (2) 39.5 kΩ At 86°F (30°C) At 104°F (40°C) 26.1 kΩ At 140°F (60°C) 12.1 kΩ 8.5 kΩ At 158°F (70°C) At 203°F (95°C) 3.8 kΩ At 221°F (105°C) 2.8 kΩ...

  • Page 48: Steam Generator Assembly

    9-8. STEAM GENERATOR ASSEMBLY Wiring Steam generator Water level sensor diagram circuit in the MAIN PWB / wiring diagram MAIN PWB DC5V IC 2 IC 1 Input A PHOTO (long) COUPLER MICOM Input B (short) GND L SENSOR Heater & Thermistor : Refer to the 9-6 / 9-7 Original THERMISTOR HEATER...
  • Page 49 2) Operation mechanism of Steam generator Function After supplying some amount of water through inlet valve and water level sensor, Heater operates and steam generates. Generated steam is sprayed by nozzle. If the water in the steam generator is reduced by spraying steam, water level sensor decide to supply water or not.
  • Page 50 9-9. LAMP Wiring Circuit in the MAIN PWB / Wiring Diagram diagram 16.5V MAIN PWB MICOM 1 2 3 1 2 3 RD BK LAMP Function The Lamp (Drum Light) comes on when the POWER button is pressed. It goes off when the door is closed and the washer starts operation.

  • Page 51: Disassembly Instructions

    10. DISASSEMBLY INSTRUCTIONS Be sure to unplug the machine before disassembling and repairing the parts. CONTROL PANEL 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 52 MAIN PWB ASSEMBLY Disconnect the POWER connector and SENSOR SWITCH ASSEMBLY. Remove the Protective cover. Disconnect the connectors. Unscrew 1 screw on the back. Remove the Main PWB.
  • Page 53 DISPENSER ASSEMBLY Disassemble the top plate assembly. Pull out the drawer. Push out the DISPENSER ASSEMBLY after unscrewing 2 screws. Unscrew the Clamp nut at the lower part of the dispenser. Disassemble the 4 connectors from the valves. Wire Color Blue Housing (YL-BK) Red Housing (VT-BK) White Housing (WH-BK)
  • Page 54 CABINET COVER 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 hinge slots at the bottom of the cover and pry it out. Unscrew the screw from the lower side of the cabinet cover.
  • Page 55 Open the door. Disassemble the clamp assembly. Tilt the cabinet cover. Disconnect the door switch connector. NOTE: When assembling the CABINET COVER, connect the door switch connector. Lift and separate the cabinet cover. Disassemble the clamp assembly. Disassemble the gasket.
  • Page 56 DOOR ① ① Open the door. ② ② Unscrew the 7 screws from the HINGE COVER. ③ ③ Put a flat ( - ) screwdriver into the openng of the hinge, and pull out the hinge cover. ④ ④ Unscrew a screw from the lower side of door. ⑤...
  • Page 57 PUMP ① ① Disassemble the cabinet cover. ② ② Separate the pump hose, the bellows and the circulation hose assembly from the pump assembly. ③ ③ Disassemble the pump assembly in arrow direction. HEATER ① ① Disassemble the cabinet cover. ②...
  • Page 58 WHEN FOREIGN OBJECT IS STUCK BETWEEN DRUM AND TUB ① ① Disassemble the cabinet cover. ② ② Separate the heater from the tub. ③ ③ Remove any foreign objects (wire, coin, etc.) by inserting a long bar in the opening. LAMP ASSEMBLY TOP PLATE ASSEMBLY ①...
  • Page 59 MOTOR/DAMPER 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 60 Checking the TSG (TURBO STEAM GENERATOR) To check out the fault diagnosis of TSG, you can pull out the plug and let the water drain away. Be cautious in case of the TSG is hot. TSG (TURBO STEAM GENERATOR) Remove the housing attached to the TSG (Heater, Water level frequency-sensor, Thermistor) Remove the screw of the TSG and Body...
  • Page 61 Taking out the screws of Body Frame (2 ea) Separate the hoses from the TSG. Remove the body frame and then, separate the TSG from the washer...

  • Page 62: Exploded View

    11. EXPLODED VIEW 11-1. CABINET & CONTROL PANEL ASSEMBLY “The following parts are not illustrated" Description Loc No. M400 *Owner’s Manual G001 M410 *Energy Label G002 *Service Manual G004 Printed materials *Wiring Diagram G005 *Quick Start Guides G006 F215 *Installation Sheet G007 A485 G010...

  • Page 63: Drum And Tub Assembly

    11-2. DRUM & TUB ASSEMBLY K143 K123 K350 K360 K351 K610 F140 K611 K411 K115 K410 F466 K110 K141 K111 K140 K117 F310 F315 K572 K571 F465 K142 K190 F464 F463 K513 K570 K122 K195 K125 K130 K320 K530 K121 K510 K512 K560...

  • Page 64: Dispenser Assembly

    11-3. DISPENSER ASSEMBLY F322 F323 F462 F321 F300 F170 F160 F227 F226 F327 F225 F430 F220 F441 F120 HOT (RED) A275 F130 COLD (BLUE) A276 F432...

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