LG F1243KDS Series Service Manual
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LG F1243KDS Series Service Manual

LG F1243KDS Series Service Manual

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WASHING MACHINE
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE PROBLEMS
CORRECTLY BEFORE OFFERING SERVICE.
BEFORE SERVICING WASHING MACHINE, UNPLUG THE POWER CORD
TO AVOID THE RISK OF ELECTRICAL SHOCK.
WHEN SERVICING INTERNAL PARTS, USE ONLY SERVICE PARTS
SUPPLIED FROM LG.
AFTER SERVICING THE ELECTRICAL WIRE, INSURE THAT INSULATION
TAPE IS APPLIED TO PREVENT ELECTRICAL SHORTAGE.
MODEL : F1443KDS(1~9) / F1243KDS(1~9) /
WF-71101TKD / WF-71101WKD
website :
http://biz.lgservice.com
e-mail : http://LGEservice.com/techsup.html

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Summary of Contents for LG F1243KDS Series

  • Page 1 BEFORE SERVICING WASHING MACHINE, UNPLUG THE POWER CORD TO AVOID THE RISK OF ELECTRICAL SHOCK. WHEN SERVICING INTERNAL PARTS, USE ONLY SERVICE PARTS SUPPLIED FROM LG. AFTER SERVICING THE ELECTRICAL WIRE, INSURE THAT INSULATION TAPE IS APPLIED TO PREVENT ELECTRICAL SHORTAGE.

  • Page 2: Table Of Contents

    CONTENTS 1. SPECIFICATIONS ..........................3 2. FEATURES & TECHNICAL EXPLANATION ..................4 3. PARTS IDENTIFICATION ......................... 6 4. INSTALLATION ..........................7 5. OPERATION ........................... 13 6. WIRING DIAGRAM / PCB LAYOUT / PROGRAM CHART ............15 7. TROUBLESHOOTING ........................19 7-1.BEFORE SVC CHECKING ...................... 19 7-2.LOAD TEST MODE ........................

  • Page 3: Specifications

    1. SPECIFICATION ITEM F1443KDS(1~9) / F1243KDS(1~9) / WF-71101TKD / WF-71101WKD POWER SUPPLY 220V-240V~, 50Hz PRODUCT WEIGHT 70kg WASHING 190W SPIN 380W ELECTRICITY DRAIN MOTOR CONSUMPTION STEAM HEATER 1200W WASH HEATER 2120W WASH 46rpm REVOLUTION F1443KDS(1~9) / No Spin/400/600/800/1000/1200/1400 WF-71101T(W)KD SPIN SPEED F1243KDS(1~9) No Spin/400/600/800/1000/1100/1200...

  • Page 4: 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. Water Circulation The detergent water from the drum is sprayed directly over the load ; this enables the clothes to get soaked more quickly during the cycle. The detergent suds can be removed more easily by the water shower during rinse cycle.
  • Page 5 2-2. DETERMINE WASHING TIME BY FUZZY LOGIC To get the best washing performance optimal time is determined by sensing the water temperature, selected washing temperature and laundry amount. water temperature washing time the best selected FUZZY washing rinse time washing LOGIC temperature performance...

  • Page 6: Parts Identification

    3. PARTS IDENTIFICATION Transit Bolts Power plug If the supply cord is damaged, it must be replaced by the manufacturer or its authorized Drawer service technician in order to avoid a hazard. Control Panel Drum Door Drain Hose Drain Plug Drain Pump Filter Adjustable Feet Lower Cover Cap...

  • Page 7: 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 8 Use spanner to remove transit bolts. 1. Unscrew the 3 bolts with the spanner supplied. 2. Take out the 3 bolts along with the rubber bungs by slightly twisting the bung. Keep the transit bolts for future use. Transit bolts Unscrew 3.
  • Page 9 Type-C : Connecting one touch type hose to tap without thread 1. Unscrew the adapter ring plate and the 4 adapter retaining screws. 2. Remove the guide plate if the tap is too large to fit the Ring plate adapter. Guide plate 3.
  • 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). Step 1 If washing machine legs are loose or not Screwed in, then tighten 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. OPERATION Cycle Selector Additional programs Rotate the Cycle selector Time Delay : Allows the start of any cycle to be delayed knob to select the cycle for 3~19 hours. designed for different Steam Wash : By pressing the Steam Wash button, if Steam types of fabric and soil Function is selected, the Steam Wash button will light up.
  • Page 14 EST. T ime remaining Spin Selector knob This display shows: To change the spin speed, turn the a) the estimated time remaining in the Spin knob to cycle through available cycle when operating. options. In case of abormal operation, error indications are displayed.

  • Page 15: Wiring Diagram / Pcb Layout / Program Chart

    6. WIRING DIAGRAM / PCB LAYOUT / PROGRAM CHART Wiring Diagram 1/3 Full Wiring Diagram...
  • Page 16 Wiring Diagram 2/3...
  • Page 17 Wiring Diagram 3/3...
  • Page 18 PCB Layout (Main) Earth Wire Connector...

  • Page 19: Troubleshooting

    7. TROUBLESHOOTING 7-1. CHECKING BEFORE SERVICE Before servicing ask the customer what the trouble is. Check the adjustments. (Power supply :220-240V~, Removal of transit bolts etc..) Check the troubles referring to the troubleshooting. Decide service steps referring to disassembly instructions. Then, service and repair.

  • Page 20: 7-3.How To Check The Water Level Frequency

    7-3. HOW TO CHECK THE WATER LEVEL FREQUENCY Press the Temp. Pre wash button simultaneously. If the knob turn around, The data view type is changed from 40 to 49 Data View Type : In case of ‘040’ The digits indicate the water level frequency. So, for example a display indicating 255 : a water level frequency of (255 X 0.1) = 25.5KHz 7-4.

  • Page 21: 7-5.How To Check The Vibration Sensor

    7-5 HOW TO CHECK THE VIBRATION SENSOR Knob Temp Pre Wash Reference of checking the vibration Display Data View Mode sensor error Vib_Sensor Y-axis_01 1. Range of vibraiton sensor data have to Vib_Sensor change between 1900 and 2100 in Y-axis_02 stopping the motor.

  • Page 22: 7-6.Error Display

    7-6. 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 23 ERROR SYMPTOM CAUSE • The connector in the LEAD WIRE ASSEMBLY is MOTOR LOCKED not connected to the connector of STATOR ERROR ASSEMBLY. Reconnect or repair the connector. • The hall sensor is out of order/defective. Replace the STATOR ASSEMBLY Page 32 •...

  • Page 24: Troubleshooting With Error Codes

    7-7. TROUBLESHOOTING WITH ERROR CODES IE (Water Inlet Error) [Note] Environmental safety check list 1. No water tap leakage or freeze 4. No entanglement of water supply hose. 2. No water shortage. 5. No water supply hose leakage 3. The inlet filter is not cloggeed. Is the water tap closed? Check the Water tap...

  • Page 25: Ue (Unbalance Error)

    UE (Unbalanced Error) 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 26: Oe (Water Outlet Error)

    OE (Water Outlet Error) Check drain hose for kink and straighten the Hose. Is the drain hose kinked ? Drain Hose Check & Clean Pump Filter. 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 27 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 no water in the Check the Air Chamber...

  • Page 28: Fe (Overflow Error)

    FE (Overflow Error) Power off for 10sec. Then power on. Is the water level over reference line and is the water level frequency 21.8khz? Data view type: ‘040’ * Water level frequency - Press and Hold 'Prewash' & 'Temp' simultaneously. Drain out the water and then Is the water coming in Check the...

  • Page 29: Pe (Pressure Sensor Error)

    PE (Pressure Sensor S/W Error) Is the Connector connected correctly to Reconnect or repair the Connector. Main PCB and the Pressure Switch Or replace the Harness. Is the Harness alright ? Is the resistance of the Pressure Switch Replace the Pressure Switch.

  • Page 30: De (Door Open Error)

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

  • Page 31: Te (Thermistor (Heating) Error)

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

  • Page 32: Le (Motor Locked Error)

    LE (Motor Locked Error) [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 33: Ae (Water Leakage)

    Disassemble the Hall Sensor 1) Disassemble the hook of Hall Sensor by (-) driver. 2) Pull up Hall Sensor slowly as shown in picture. Caution If you disassemble by force,not following the directions, the hooks of stator(red circled) might break. Hence need change of stator assembly.

  • Page 34: Troubleshooting Without Error Codes

    8. TROUBLESHOOTING WITHOUT ERROR CODES No Power Is the Power Plug connected Reconnect Power Plug firmly. firmly to the power outlet? Check the fuse or And is the supply voltage reset the circuit breaker. 220~240V AC? Is Multi-plug socket used ? Don’t use Multi-plug socket.

  • Page 35: Vibration & Noise During Spin

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

  • Page 36: Detergent & Softener Does Not Flow In

    Detergent & Softener does not flow in Refer to [IE (Water Inlet Error)] Is water supplied? (page 24) Is detergent & softener put in the correct compartment of the drawer? Only softener Put it in the Correct Position. Main Wash Pre Wash (Powder) (Powder)

  • Page 37: Water Leak

    Water Leak 1. Water Leak from Dispenser Is the Dispenser Tray Damaged or warped? Replace the Dispenser Tray. Is detergent & softener put in Put it in the Correct Position. the correct compartment of the drawer? Only softener Reference (Amount of Detergent & Softener) Main Wash Pre Wash Detergent...
  • Page 38 2. Water Leak from Door 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? Replace the Inlet Hoses.

  • Page 39: Part Inspection

    9. Part inspection 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 Test points Result Test Points Result 0 Ω...

  • Page 40: Door Lock 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 41 Test points Result Test Points Result Remarks (2) to (4) 700-1500 Ω At 77 ¡F ¡C (3) to (4) 60-90 Ω At 77 ¡F ¡C (4) to (5) Infinity (2) to (4) 120 Vac Voltage Input...

  • Page 42: 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 43 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 44 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 45: Pump Motor Assembly

    -4. PUMP MOTOR ASSEMBLY iring Circuit in the MAIN P B iring Diagram diagram MAIN P B Rg Cg 1 2 3 1 2 3 1 2 3 4 1 2 3 3 2 1 MICOM 3 2 1 CONNECTOR Pump Driving circuit DRAIN PUMP...

  • Page 46: Inlet Valve Assembly

    -5. INLET VALVE ASSEMBLY iring Circuit in the MAIN P B diagram MICOM Inlet valve driving circuit CONNECTOR INLET iring Diagram VALVE MIAN P B COMMON GY VT BL (BK) 1 2 RD MAIN BLEACH VALVE INLET VALVE * All load circuits in wiring diagram are all the same. Function Depending on the cycle and water temperature, the controller will energize the hot or cold water valve solenoids to meet the selected water temperature.

  • Page 47: Disassembly Instructions

    10. DISASSEMBLY INSTRUCTIONS Remove the power cord from the outlet before disassembling or repairing the unit. CONTROL PANEL Screws 1 Unscrew the screws on the top plate. 2 The plate assembly(Top) is pulled back and then upward in direction of arrow. 3 The cover(Inner) is disassembled.
  • Page 48 PWB ASSEMBLY(MAIN) 1 Disassembly lower cover assembly. 2 Two screws are unscrewed. 3 Pull the PWB assembly in direstion of red arrow. 4 Disassembly PWB like the picture. DISPENSER ASSEMBLY 3 Two screws are unscrewed. 4 Clamp 1 The plate assembly(Top) is disassembled. 2 Pull the drawer in direction of arrow.
  • Page 49 INLET VALVE 1 Disconnect the wiring connector. 2 Remove the valve by two screws of the valve holder. When reconnecting the connector VALVE (STEAM) VIOLET/BLACK-BLACK VALVE (PRE-WASH) WHITE/BLACK-BLACK VALVE (NORMAL-WASH) GRAY/BLACK • Rating : 220/240V 50/60Hz • Resistant : 3.5~4.5kΩ DOOR 1 Open the door completely.
  • Page 50 CABINET COVER Two screws are unscrewed 1 The plate assembly(Top) is disassembled. 2 Pull out the drawer and unscrew 2 screws. 3 Lift the side the Control Panel Assembly and pull it out Pull the drawer to arrow direction. 1 Unscrew two screws. 2 Push out PANEL ASSEMBLY, CONTROL after Push the hook( ) below.
  • Page 51 4 Lift and separate the cabinet cover. NOTE: When assembling the CABINET COVER, connect the Door S/W connector. SWITCH ASSY, DOOR LOCK 1 Unscrew two screws and cabinet cover disassembled. 2 The Door Lock S/W is disconnected from the wiring connector and the strap. •...
  • Page 52 AG (Alpha Generator) 1 Remove the housing coupled the AG (Connector, Hoses, Earth Screw) 2 Take out the screw of the AG. < Heater for STEAM> • Rating : 230V 1100W • Resistant : 42.5~49.5Ω ROTOR ASSEMBLY, STATOR ASSEMBLY, FRICTION DAMPER 1 Remove the back cover.
  • Page 53 PUMP 1 Lower cover is disassembled. 2 Take out PWB assembly in front of washer. 3 Remove 3 clamps from the each hose. 4 Remove 4 screws from the base cabinet. 5 Disconnect the wire of pump. 6 Take out drain pump assembly in direction of red arrow.
  • Page 54 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 lower cover assembly. 2 Disassembly MAIN PWB ASSEMBLY 3 Disconnect the wiring connector. Fist, Press hook and turn the safety switch assembly switch assembly safety.
  • Page 55 Cablinet Back Disassembly Needed tool : (+) Electric driver Disassembly top plate assembly. 2 Remove 6 screws between back cover and side cabinet. 3 Remove 4 screws conneted back cover with base cabinet. 4 Remove 2 screws, between back cover and tub outer.
  • Page 56 Rear Gasket Needed tools :12,13 mm wrench, ( ) Clamp Jig, Cable Tie, (+) Electric driver Disassembly top plate assembly. Disassembly back cover. Remove rear gasket clamp large and small by using gasket clamp jig. Unscrew a rear suspension nut. Unscrew a bolt , between bearing housing and rear suspension.
  • Page 57 Front Gasket Needed tools : ( ) Clamp Jig, (+) Electric driver Disassembly top plate assembly. Disassembly control panel assembly. Disassembly lower cover. Disassembly cabinet cover. Diassembly front gasket clamp by using clamp jig. 6 Take out gasket hole parts from the hook of tub cover (Direction of 11:00, 9:00, 7:00, 6:00, 5:00, 3:00 and 1:00 o’clock ) ( Pay attention to gasket rib where there...
  • Page 58 Friction Damper (Right side) Needed tools : Damper pin Jig, long nose, (+) Electric driver The right side cabinet is disassembled. Remove 2 damper pins from the damper bracket and base holder. Disassembly friction damper. Suspension (Right side) Needed tools :12,13 mm wrench, (+) Electric driver The right side cabinet is disassembled.
  • Page 59 Damper Bracket (Right side) Needed tool : 12,13mm wrench, (+) Electric driver Disassembly top plate assembly. Remove 8 screws , right side of back cover. Disassembly control panel assembly. Disassembly lower cover. Disassembly cabinet cover. Remove an earth screw on the right side cabinet. Disassembly right side cabinet.
  • Page 60 Vibration Sensor Needed tools :Nipper, Cable Tie, (+) Electric driver The back cover is disassembled. Remove a cable tie. Disassembly vibration senser assembly.

  • Page 61: Exploded View And Part List

    10. EXPLODED VIEW AND PART LIST 10-1. THE PART LIST OF CABINET ASSEMBLY A106 A110 A080 A090 A101 A104 A276 A141 A430 A131 A130 A140 A485 A440 A134 A410 A102 A154 A300 A153 A152 A151 A303 A135 A310 A150 K645 K640 K650 K610...
  • Page 62 & DISPENSER ASSEMBLY M400 F300 F324 F462 F321 F322 F170 F160 F432 F225 F430 F220 F441 F120 F215 F110 F216 F210...
  • Page 63 10-3. THE EXPLODED VIEW OF DRUM & TUB ASSEMBLY F320 K160 K111 K115 F310 K105 F328 K117 F467 K141 K140 K530 K510 K110 K150 K320 F461 K540 K520 K560 F462 IN BASE K123 A260 K531 K130 K124 K120 K125 K121 K122 K350 K360 K143...
  • Page 64 P/No. : MFL62645301...

This manual is also suitable for:

F1443kds seriesWf-71101tkdWf-71101wkd

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