LG WM3488HW Service Manual
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LG WM3488HW Service Manual

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WASHING MACHINE
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLES
CORRECTLY BEFORE OFFERING SERVICE.
BEFORE SERVICING THE WASHING MACHINE, UNPLUG THE POWER
CORD TO AVOID THE RISK OF AN ELECTRIC SHOCK.
WHEN SERVICING INTERNAL PARTS, USE ONLY SERVICE PARTS
SUPPLIED FROM LG.
AFTER SERVICING THE ELECTRIC WIRE, INSURE THAT INSULATION
APE IS APPLIED TO PREVENT AN ELECTRICAL SHORT.
MODEL : WM3488HW
website :
http://biz.lgservice.com
e-m ail : http://LGEservice.com/techsup.html

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  • Page 1 BEFORE SERVICING THE WASHING MACHINE, UNPLUG THE POWER CORD TO AVOID THE RISK OF AN ELECTRIC SHOCK. WHEN SERVICING INTERNAL PARTS, USE ONLY SERVICE PARTS SUPPLIED FROM LG. AFTER SERVICING THE ELECTRIC WIRE, INSURE THAT INSULATION APE IS APPLIED TO PREVENT AN ELECTRICAL SHORT. MODEL : WM3488HW...
  • Page 2 P/No.: MFL62645378...

  • Page 3: Table Of Contents

    CONTENTS 1. SPECIFICATIONS ..........................3 2. FEATURES & TECHNICAL EXPLANATION ..................4 3. PARTS IDENTIFICATION ......................... 6 4. INSTALLATION ..........................7 5. OPERATION ........................... 12 6. WIRING DIAGRAM / PCB LAYOUT / Filter Assembly Filter Layout ..........14 7. TROUBLESHOOTING ........................17 7-1.BEFORE PREFORMING SERVICE ..................

  • Page 4: Specifications

    1. SPECIFI CATION ITEM WM3488HW POWER SUP P LY 120 V ~, 60 Hz PRODUCT WEIGHT 71 kg WASHING 113 W SPIN 304 W ELECTRICITY DRAIN MOTOR 80 W CONSUMPTION WASH HEATER 1000 W DRY HEATER 1200 W 46 rpm...

  • Page 5: Features & Technical Explanation

    2. FEATURES & TECHNICAL EXPLANATION 2-1. FEATURES Inverter Direct Drive system The advance Brushless DC motor directly drives the drum without belt and pulley. 6 motion Washer is able to perform various drum actions or a combination of different actions depending on the wash program selected.
  • Page 6 2-2. DETERMINE WASHING TIME BY FUZZY LOGIC To get the best washing performance optimal time is determined by sensing of water temperature, selected washing temperature and laundry amount. water temperature washing time the best selected FUZZY washing rinse time washing LOGIC temperature performance...

  • Page 7: Parts Identification

    Tie strap (for securing drain hose) NOTE Contact LG Customer Service at 1-800-243-0000 (1-888-542-2623 in Canada) if any accessories are missing. For your safety and for extended product life, use only authorized components. The manufacturer is not responsible for product malfunction or accidents caused by the use of separately purchased unauthorized components or parts.

  • Page 8: Installation

    4. INSTALLATION INSTALLATION The appliance should be installed as follows. Check the conditions of installation area. 1. Check level ground. horizontal On raised foundations or upper level homes, the vibrations can be caused by the type of flooring. It may be necessary to move machine to a different area in the home or have the floor...
  • Page 9 Use spanner to remove transit bolts. Without removal of transit bolts Spin noise and shaking. X 4 EA Transit bolts Confirm the distance between the appliance and the wall. If the distance is less than 2cm, More than 2cm the water supply hose will kink or fold.
  • Page 10 Connect Drain Hose. If the drain hose is not installed properly, the unit will not drain properly. This allows water to back flow into the unit which can cause odors. Refer to Owner Manual for proper drain hose installation. The odor could also be coming from the home’s drain to which the drain hose is attached. Laundry tub about 100 cm Hose...
  • Page 11 Check the horizontality with a level (Gage). 1 Step If washing machine legs are loose or not screwed, then screw up with the spanner wrench. Using the level, level the washing machine from front to back and side to side. A level Higher Tighten...
  • Page 12 Test operation Preparation Press the power button. Press the START/PAUSE button. washing. · Connect the power plug to the · In case of Coloreds program. outlet. · Connect the inlet hose. Check the water heating. Check automatic reverse turn. Check the water supply. ·...

  • Page 13: Operation

    5. OPER ATION Cycle Selector Power • Rotate the Cycle selector • • Use this button to turn the knob to select the cycle power On/ Off. designed for di fferent types of fabric and soil levels. Start/ Pause Additional Programs •...
  • Page 14 LED Display • Display the estimated remaining time (Hour : minute) to finish. • In case of abnormal operation. error indications are displayed (IE, OE, UE, dE, tE, FE, PE, LE, PF, DHE) • See troubleshooting guide. Option Buttons Cycle setting Buttons •...

  • Page 15: Wiring Diagram / Pcb Layout / Filter Assembly Filter Layout

    6.WIRING DIAGRAM / PCB LAYOUT WH/RD FUSE THERMOSTAT GN/YL FUSE FUSE...
  • Page 16 PCB Layout (Main) Heater Dry Heater Display Power PCB POWER Motor Stator Control /U~ W /W~ V ⇒R:8~ 11Ω Thermistor Pressure Switc h & Measure Hz impossible LED Display Here. Just Check cut-off Circulation Pump Common Circulation Pump (152~170Ω) Door S/W Pressure Door S/W &...
  • Page 17 Filter Assembly Filter Layout PCB Power Earth Power Cord...

  • Page 18: Troubleshooting

    7. TROUBLESHOOTING 7-1. BEFORE SVC CHECKING Before servicing ask the customer what the trouble is. Check the adjustments. (Power supply : 113-127 V, Removal of transit bolts etc..) Check the troubles referring to the troubleshooting. Decide service steps referring to disassembly instructions. Then, service and repair.

  • Page 19: 7-3.How To Know The Water Level Frequency

    7-3. HOW TO CHECK THE WATER LEVEL FREQUENCY Press the Custom PGM Temp. button simultaneously. The digits means water level frequency. (10 kHz) ex) 241 : Water level frequency = 241 x 10 24.1 kHz 7-4. HOW TO KNOW TO TEMPER ATURE OF EACH THERMISTOR AT OPER ATING CONDITION.

  • Page 20: 7-5.Error Display

    7-5. ERROR DISPLAY If you press the Start/Pause button in error condition, any error except will disappear and the machine will change into the pause status. In case of , if the error is not resolved within 20 sec., and in case of other errors, if the error is not resolved within 4 min., power will be turned off automatically and the error only will be blinked.
  • Page 21 SUPPLIED • Supplied voltage and rated voltage are not matched. VOLTAGE IS NOT CORRECT NFC MODULE • The connector in the DISPLAY PCB ASSEMBLY is ERROR not connected to the connector of NFC PCB ASSEMBLY. Reconnect or repair the connector. •...

  • Page 22: 7-6.Troubleshooting With Error

    7-6. TROUBLESHOOTING WITH ERROR Water Inlet Error (IE) [Note] Environmental safety check list 1. No water tap leakage & freeze. 2. No entanglement of water supply hose. 3. No water shortage. 4. No water supply hose leakage. 5. No the inlet filter clogged. Is the water tap closed? Check the Water tap...

  • Page 23: Ue (Unbalanced Error)

    Unbalanced Error (UE) The few items of clothing will clump together Does the load lean toward one and their weight will be in one place on the drum, side, or is the load a few items? throwing the weight off during spin mode. So add some laundry to overcome UE error.

  • Page 24: Oe (Water Outlet Error)

    Water Outlet Error (OE) Check drain hose for kink and straighten the Hose. Is the drain hose kinked ? Drain Hose Pump Filter. Check & Clean Is the Pump filter clogged ? This kind of accumulation on the drain filter not only prevents proper drainage, but also will promote bacteria growth and cause odors.
  • Page 25 Is the Standpipe Height greater Observe Standpipe Height requirements than 1.0 m above the floor? of 1.0m maximum. - Your washer will not be able to drain out water adequately, if the standpipe exceeds 1.0 m. In this case, water may flow back into the washer. When there is not water in the Check the Air Chamber...

  • Page 26: Fe (Flow Over Error)

    Over Flow Error (FE) Replace the Inlet Valve assembly . Is the water coming in drawer continuously ? After power off for 10 sec. and power on. Does the water level over reference line and Is the water level frequency 26.2Khz ? Or does the water level over reference line and is the water level frequency 26.2Khz ? * Water level frequency...

  • Page 27: Pe (Pressure Sensor S/W Error)

    Pressure Sensor S/W Error (PE) Is the Connector connected correctly to Reconnect or repair the Connector Main PCB and the Pressure Switch Or replace the Harness Or is the Harness alright ? Is the resistance of the Pressure Switch Replace the Pressure Switch out of range? [Pin1 ~ Pin3]...

  • Page 28: Door Open Error)

    Door Open Error (dE) Close the door totally. Is the door closed? Is the Door assembly in line with door Lift up & Close the door. switch ? If the dE is displayed, Replace the Door Bracket. Scratch by Latch Hook Touching Does the Spring...

  • Page 29: Te (Thermistor (Heating) Error)

    Thermistor (Heating) Error (tE) Is the Connector connected correctly to Reconnect or repair the Connector Main PCB and the Thermistor and the Heater? Or replace the Harness Or is the Harness alright ? Heater for Washing Is the resistance of the Thermistor out of range 44 ~ Replace the...

  • Page 30: Le (Motor Lock Error)

    Motor Locked Error (LE) [Pre Check] • Gentle wash cycles, such as Perm Press, Delicates, Hand Wash, and Wool/Silk should only be used for smaller loads. Because these cycles are more gentle in tumbling and spinning, putting too much in the drum can register an issue with the motor.

  • Page 31: Dhe (Dry Heater Error)

    Dry Heater Error (dHE) Is the Connector connected correctly to Reconnect or repair the Connector Main PCB and the Dry Heater Motor? Or replace the Harness Or is the Harness alright? Is the resistance of the Thermistor out of range Replace the Thermistor 2.5~180KΩ...

  • Page 32: Dry Heater Trouble

    Dry Heater Trouble After power off, is the resistance of Dry Heater out of Replace the Heater. range 33~37Ω? Thermostat closed ? Replace the Thermostat. When checking voltage between connectors(1,2) Replace the PWB assembly (main). on drying, is the voltage AC 220-240V as the figure ?

  • Page 33: Dry Fan Motor Trouble

    Dry Fan Motor Trouble Is the Connector connected correctly to Reconnect or repair the Connector Main PCB and the Dry Heater Fan Motor Or replace the Harness Or is the Harness alright? Are the resistance same between terminal points? Replace the Dry Fan Motor V~U / U~W / W~V : 2~5Ω...

  • Page 34: Troubleshooting Without Error Codes

    8. TROUBLESHOOTING WITHOUT ERROR CODES PF(Power Failure or No Power) Is the Power Plug connected ReconnectPower Plug firmly. firmly to the power outlet? Check the fuse or And is the supply voltage reset the circuit breaker. 110~120V AC? Is Multi-plug socket used ? Don’t use Multi-plug socket.

  • Page 35: Vibation & Noise In Spin

    Vibration & Noise In Spin Have all the Transit Bolts and the Base Packing Remove the Transit Bolts. been removed? Washer Packing Support Refer to INSTALLATION. (Page 7)

  • Page 36: Detergent & Softener Does Not Flow In

    Detergent & Softener does not flow in Refer to [Water Inlet Error (IE)] Is water supplied? (page 21) Is detergent & softener put in the correct compartment of the drawer? Only softener Correct Position. Put it in the Main Wash Pre Wash (Powder) (Powder)

  • Page 37: Water Leak

    Water Leak 1. Water Leak from Dispenser Is the Dispenser Tray Damaged or warped? Dispenser Tray. Replace the Is detergent & softener put in Correct Position. Put it in the the correct compartment of the drawer? Only softener Reference (Amount of Detergent & Softener) Main Wash Pre Wash Detergent...
  • Page 38 2. Water Leak from Dispenser Are the gasket (seal) Clean the periphery of Gasket Door regularly. and door cleaned regularly? Is the door or gasket damaged? Replace the damaged parts. 3. Unknown – Water on Floor Are the inlet hoses loose or cracked/split? Inlet Hoses.

  • Page 39: Disassembly Instructions

    9. DISASSEMBLY INSTRUCTIONS Remove the power cord from the outlet before disassembling or repairing the unit. CONTROL PANEL ASSEMBLY Screws 1 Unfasten the screws from the parts displayed in the fig. 2 Disassemble the top plate assembly by sliding it back and then lifting it up. 3 Pull the drawer panel assembly out.
  • Page 40 PWB ASSEMBLY(MAIN) 1 Disassembly Back cover 2 First Unscrew one or two screws Pull the PWB assembly in direction of red arrow 3 Disassembly PWB like the picture DISPENSER ASSEMBLY 1 The plate assembly(Top) are disassembled. 2 Pull the drawer to arrow direction. 3 Two screws are unscrewed.
  • Page 41 INLET VALVE 1 Disconnect the wiring connector. 2 Remove the valve by two screws of the valve holder. When reconnecting the connector VALVE (Pre-Wash) Gray/White-BLACK VALVE (Main-Wash) White/Black-Black VALVE (Dry) Black-Red BLACK-Blue VALVE (Hot) • Rating : 220/240V 50/60Hz • Resistant : 3.5~4.5kΩ DOOR 1 Open the door completely.
  • Page 42 CABINET COVER ASSEMBLY Screws 1 Disassemble the top plate assembly. 2 Pull the drawer panel assembly out. 3 Unfasten the screws from the parts displayed in the fig. 4 Unfasten the screws from the parts displayed in the fig. 5 Disconnect the wiring connectors between the multi harness and the control panel assembly.
  • Page 43 10 Disassemble the cabinet cover assembly by pulling the lower part of the cabinet cover assembly first and then lift it up. NOTE : When assembling the cabinet cover assembly, connect the multi harness to the door switch assembly. LOCKER SWITCH ASSEMBLY 1 Unfasten the screws from the cabinet cover assembly.
  • Page 44 ROTOR ASSEMBLY, STATOR ASSEMBLY, FRICTION DAMPER 1 Remove the back cover. 2 After loosening the bolt, Rotor, pull out the rotor. 1 Remove the 6 bolts from the stator. 2 Disconnect the 2 connectors. Motor Stator U V W • V ~ U (8~11Ω) •...
  • Page 45 PUMP 1 Disassembly Top Plate, Control Panel, Drawer Panel Assembly, Cabinet Cover Assembly, Lower Cover Assembly 4 Remove pump outlet hose. Bellows Circulation 5 Remove tub pump bellows. Hose 6 Remove cap(Remaining Hose). Pump Hose 7 Disconnect the wiring. 8 Three screws are unscrewed from the cabinet. 9 Remove the pump to arrow direction.
  • Page 46 WHEN FOREIGN OBJECT STUCK BETWEEN DRUM AND TUB 1 Remove washing heater. 2 Remove the foreign object(wire,coin,etc) by inserting long bar in the hole. SWITCH ASSEMBLY, SAFETY 1 Disassembly Back cover. 2 First Unscrew a screw and Pull the PWB assembly in direction of red arrow * Skip this instruction to 550 models 3 Disconnect the wiring connector.

  • Page 47: Exploded View

    10. EXPLODED VIEW AND PART LIST 10-1. THE PART LIST OF CABINET ASSEMB LY A106 A140 A110 A153 A154 A102 A103 A104 A152 A151 A150 A101 A141 A131 A100 A430 A130 A440 A134 A410 A135 A455 A300 A133 A310 A450 A303 A200 A201...
  • Page 48 10-2. THE EXPLODED VIEW OF CONTROL PANEL & DISPENSER ASSEMBLY F324 F300 F330 F321 F170 F340 F462 F160 F432 F225 F430 F220 F441 F120 F215 F110 F210...
  • Page 49 10-3. THE EXPLODED VIEW OF DRUM & TUB ASSEMBLY K143 K350 K360 K123 F140 K411 K121 K122 K410 K125 F310 F464 K146 F320 K320 F466 K111 M105 K110 K141 K140 K105 K115 K410 K130 K135 K610 K512 K510 K560 K611 K530 K131 K572...
  • Page 50 10-4. THE EXPLODED VIEW OF DRYER M100 M240 M130 M120 M111 M216 M110 M210 M230 M215 M101 M220 M140...

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