LG WT901CW Service Manual
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LG WT901CW Service Manual

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WASHING MACHINE
SERVICE MANUAL
CAUTION
Before servicing the washer, Read the safety precautions in the manual.
MODELS : WT901CW
WT901CF

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Summary of Contents for LG WT901CW

  • Page 1 WASHING MACHINE SERVICE MANUAL CAUTION Before servicing the washer, Read the safety precautions in the manual. MODELS : WT901CW WT901CF...

  • Page 2: Table Of Contents

    SAFETY PRECAUTION! IMPORTANT SAFETY NOTICE! This service information is intended for individuals possessing adequate backgrounds of electrical, electronic, and mechanical experience. Any attempt to repair this appliance may result in personal injury or property damage. The manufacturer or seller can not be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.

  • Page 3: Specifications

    1. SPECIFICATIONS Models WT901CW, WT901CF Electrical 120 VAC@60 Hz. Plastic Inner Tub Stainless Inlet Water Pressure 14.5 - 116 PSI (100 - 800 kPa) Rating of Fuse 120V/60Hz Spin Speed 680 ± 50 rpm Weight 110 lbs. (50kg) Normal, Heavy duty, Bulky, Tub Clean,...

  • Page 4: Installation Instructions

    2. INSTALLATION INSTRUCTIONS 2-1. HOW TO ADJUST LEVEL Installation area Checking level Install the washer on a firm, flat • Open the lid, check if the washer is • surface. correctly leveled by looking down If the washer is installed on an •...
  • Page 5 Horizontal setting Distance between the drain hose • If the washer is not level, adjust the and the wall leveling feet. Turn clockwise to raise, Distance between the drain hose and • counterclockwise to lower. the wall should be more than 4 inches (10 cm,) and the distance between any side to side other part and the wall should be more...

  • Page 6: Connecting Water Supply Hose

    2-2. CONNECTING WATER SUPPLY HOSE Before connecting the water supply hose to the water tap, check the hose type, and then choose the correct instruction here below. Screw Type Be sure there is a gasket in both ends of the hose. Push the water supply hose up so that the rubber gasket Water tap within the hose can adhere completely to the tap.

  • Page 7: Connect The Drain Hose

    2-3. CONNECT THE DRAIN HOSE • Connect the drain hose to the • Then push it toward the body of • Check that the drain hose is hung outlet of the drain pump located at the washing machine as indicated up over the edge of the laundry tub.

  • Page 8: Operating Instructions

    3. OPERATING INSTRUCTION 3-1. IDENTIFICATION OF PARTS POWDER AND LIQUID *WATER SUPPLY DETERGENT BOX HOSE Make sure the water does LINT FILTER not leak. Clean regularly to stop linting on the clothes load. *POWER PLUG If the supply cord is BLEACH damaged, it must be DISPENSER...

  • Page 9: Before Starting To Wash

    3-2. BEFORE STARTING TO WASH Care Labels • Look for a care label on your clothes. This will tell you about the fabric content of your garment and how it should be washed. Sort clothes into loads that can be washed with the same wash cycle, water temperature, and spin speed.
  • Page 10 1) Using Water Water Temperature • The machine sets the appropriate temperature automatically according to the wash program . You can override the preset selection by pressing the water temperature icon. Touch the arrow buttons up or down until your desired temperature setting is displayed. •...
  • Page 11 2) Using Detergent Detergent Follow the detergent package directions. Using too little detergent is a common cause of laundry problems. Use more detergent if you have hard water, large loads, greasy or oily soils, or lower water temperature. Choosing the Right Detergent Your washing machine is designed for use with only High-Efficiency (HE) detergents.
  • Page 12 Using the Dispenser Drawer ABOUT THE DISPENSER The automatic dispenser consists of two compartments which hold: • Liquid fabric softener. • Liquid or powdered detergent. All laundry products can be added at once in their respective dispenser compartments. They will be dispensed at the appropriate time for the most effective cleaning.
  • Page 13 Adding Detergent Add measured detergent to the detergent compartment of the dispenser drawer. • Do not exceed the maximum fill line. Detergent is flushed through the dispenser at the beginning of the wash cycle. Either powdered or liquid detergent can be used, but the drawer insert must be removed to use powder.
  • Page 14 3) Special Guide for Stain Removal WARNING Do not use or mix liquid chlorine bleach with other household chemicals such as toilet cleaners, rust removers, acid, or products containing ammonia. These mixtures can produce dangerous fumes which can cause serious injury or death. To reduce the risk of fire or serious injury to persons or property, comply with the basic warnings listed below: •...
  • Page 15 Stain Removal STAIN TREATMENT Adhesive tape, chewing Apply ice. Scrape off excess. Place stain face down on paper towels. Saturate with gum, rubber cement prewash stain remover or nonflammable dry cleaning fluid. Baby formula, dairy Use product containing enzymes to pretreat or soak stains. products, egg Beverages (coffee, tea, soda, Pretreat stain.

  • Page 16: Function Of Each Button

    3-3. FUNCTION OF EACH BUTTON Load Sensing · It operates in all cycles. · During detection by the sensor, the LOADSENSING LED flashes. · It automatically senses the size of the load. · During this step, the washing machine selects an optimized washing algorithm.
  • Page 17 POWER · Power on. · Push again, power goes off · Power goes off automatically after the wash is finished. · After turning the power on, the unit will automatically turn off if nothing is selected. START/ PAUSE BUTTON · Use to start or pause the wash cycle.

  • Page 18: Washing Programs

    3-4. WASHING PROGRAMS. CYCLE GUIDE The cycle guide below shows the default settings, available options and recommend- = AVAILABLE OPTION ed fabric types for each cycle. Allowable modifier adjustments are shown below the = Default Setting default setting for each cycle. Extra Fabric Water...

  • Page 19: Care And Maintenance

    3-5. CARE AND MAINTENANCE When There Is The Possibility Of Freezing Temperatures • Close the water taps and remove the water supply hoses. • Remove the water which remains in the water supply. • Lower the drain hose and drain the water in the sump and the drain hose by running a spin cycle. If Frozen •...

  • Page 20: Service Information

    4. SERVICE INFORMATION 4-1. WIRING DIAGRAM...

  • Page 21: Program Time Chart

    4-2. PROGRAM TIME CHART Rinse Wash Spin 1st Deep Rinse 2nd Deep Rinse Total Water Wash Cycle Time Level Temp Water water water Wash Drain Intermittent Power Shower Rinse Drain Intermittent Power Shower Rinse Drain Intermittent Spin Power (min) Supply Supply Supply (min)

  • Page 22: Adjustment

    4-3. ADJUSTMENT 1) Brake lever adjustment • Shown as in the figure, untighten the adjustment screw to keep clearance less than 1.9°± 0.1 mm between the tip and the brake lever. Turn on the lock nut, then paint it red. CAUTION •...

  • Page 23: Disassembly Instruction

    4-4. DISASSEMBLY INSTRUCTION ▶ Be sure to unplug the power to repair and replace electric parts. ESD (ElectroStatic Discharge) WARNING Be sure to follow proper ESD and grounding precautions for diagnosis and repair. If this is not possible, touch the ground wire on a regular basis to remove any static charge built up on your person 1) Disassembly of Front Panel and PCB Assembly...
  • Page 24 2) Disassembly of Back Panel, Power Cord, Inlet Valve and BP Sensor ① Remove two back panel fixing screws in the back side. ② Disassemble the back panel. ③ Disconnect two connectors and disassemble the Back Panel power cord. ④ Remove a valve fixing screw and disconnect the leads from the inlet valve.
  • Page 25 3) Disassembly of Lid Assembly, Top Cover, Tub Cover, Pulsator and Inner Tub cover ① Remove Q-spring and two hinge pins then disassemble the lid assembly ② Remove two top cover attaching screws in the rear, then disassemble the top cover. Inner tub ③...

  • Page 26: Test Running Without Water

    4-5. TEST RUNNING WITHOUT WATER 1) SAFETY CAUTION • The main power board assembly has exposed live 120 VAC and live DC voltages. Use care when disconnecting connectors during troubleshooting and testing. (Wear electrostatic discharge gloves when handling the board.) •...

  • Page 27: Troubleshooting Against Common Washing Problems

    4-6. TROUBLESHOOTING AGAINST COMMON WASHING PROBLEMS Many washing problems involve poor soil and stain removal, residues of lint and scum, and fabric damage. For satisfactory washing results, follow these instructions. Use ONLY powdered or liquid HE (High Effificiency) detergents. Do NOT use flakes scraped from a soap cake or bar, flakes, soap ribbons (available in some markets,) detergent tablets, plastic pouches, magic laundry balls, or anything other than powdered or liquid HE detergent products.

  • Page 28: Troubleshooting Methods According To Error Message

    4-7. TROUBLESHOOTING METHODS ACCORDING TO ERROR MESSAGE For more detailed information for trouble shooting refer to pages 31 to 42. ERROR DECISION CAUSE FOR ERROR ERROR REMEDY BASIS OCCURRENCE • Open water faucet. • Water faucet is closed? WATER • WATER LEVEL does •...
  • Page 29 ERROR DECISION CAUSE FOR ERROR ERROR REMEDY BASIS OCCURRENCE DOOR • LID is opened in the • Lid is opened during intermittent • Close the lid. course of OPEN spin or normal spin? intermittent spin, • Lid is opened while processing •...

  • Page 30: How To Diagnose And Repair By Symptom

    4-8. HOW TO DIAGNOSE AND REPAIR BY SYMPTOM 1) Washer is not energized. Where, what, and how to check? Result of Check Possible Cause How to repair and settle Household Power supply Change the electrical. 1. Check whether connection between Poor Defect of the the plug and the electrical is poor.
  • Page 31 2) Defects on displaying function Where, what, and how to check? Result of Check Possible Cause How to repair and settle Main voltage To explain that it is 1. Measure mains voltage at the wall Less than 85% Low voltage. caused by low voltage in of the rating.
  • Page 32 3) Reset during operation Where, what, and how to check? Result of Check Possible Cause How to repair and settle Drain Motor 1. Operate washer setting spin only, Reset happens Change the drain motor. Defect of the drain after the dr ain then press the START/PAUSE button motor (A noise motor works.
  • Page 33 4) Water doesn’t come into the wash bowl. Where, what, and how to check? Result of Check Possible Cause How to repair and settle Pressure Sensor Reconnect the connector (Pressure Switch) Connector is taken PE Error or change leads. Change off, or lead or coil is displayed.
  • Page 34 6) Pulsator doesn’t rotate normally. Where, what, and how to check? Result of Check Possible Cause How to repair and settle Pulsator rotates at one direction. Turn the power off and on again then that Clockwise Unusual operation. 1. The pulsator rotates normally at the symptom disappears.
  • Page 35 6) Pulsator doesn’t rotate normally. Where, what, and how to check? Result of Check Possible Cause How to repair and settle 4. Pulsator rotates weakly. Less than 85% 1) Check voltage at the power outlet Explain the causes and a Lower voltage.
  • Page 36 7) Water does not drain. Where, what, and how to check? Result of Check Possible Cause How to repair and settle 4. Check whether the drain hose is Blocked. Blocked hose. Remove the objects and blocked by foreign objects. It may reinstall so that it can’t happen in case of the hose is a little be kinked.
  • Page 37 8) Water drains though it is not the time of drain. Where, what, and how to check? Result of Check Possible Cause How to repair and settle Drain Motor (for Non-Pump Model only) Change the drain motor. Blocked. Defect of the drain 1.
  • Page 38 10) Spin extraction is not proceeded. Where, what, and how to check? Result of Check Possible Cause How to repair and settle Motor 1. In the case that the wash motor does not Change the capacitor There is motor Defect of the spin during spin extraction;...
  • Page 39 11) Spining is going on even though the lid is open. Where, what, and how to check? Result of Check Possible Cause How to repair and settle Reed switch is short Pressure Sensor Keep magnet away from by magnetic on the washer.
  • Page 40 13) Vibration, Noise, or Unbalance Error happens during spin. Where, what, and how to check? Result of Check Possible Cause How to repair and settle Using conditions such as installation etc. Level the washer. Defect of Not leveled. 1. Check whether the washer is installation leveled.
  • Page 41 14) Power is automatically turned off during operation or immediately turning on the power switch. Where, what, and how to check? Result of Check Possible Cause How to repair and settle Main voltage Defect in main. Explain the cause. 1. It is mostly caused by line noise or (It happens specially power cut.

  • Page 42: Exploded View

    5. EXPLODED VIEW TOP COVER ASSEMBLY TUB ASSEMBLY CABINET ASSEMBLY...
  • Page 43 A020 A010 A023 A030 A040 A050 A240 A202 A200 A060 A203 A190 A210 A152 A150 A160 A230 A100 A220 A160 A181 A183...
  • Page 44 F031 F032 F070 F001 F000 F090 F100 (F090) & (F100) The replacement parts in this kit may be different than the original. Replace all the original drain hose parts with these new parts. F080 F020 F023 F027 F023 F050...
  • Page 45 K000 K380 K010 K021 K020 K025 K063 K030 K390 K040 K200 K160 K050 K061 K210 K060 K140 K220 K250 K064 K230 K100 K130 K170 K260 K180 K190 K280...
  • Page 46 Sep, 2016 PRINTED IN THAILAND P/No. MFL68041326...

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Wt901cf

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