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LG WD14070D6 Service Manual

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WASHING MACHINE
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE PROBLEMS
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
TAPE IS APPLIED TO PREVENT AN ELECTRICAL SHORT.
MODEL : WD14070D6 / WD14070SD6
website :
http://biz.lgservice.com
e-mail : http://LGEservice.com/techsup.html

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  • Page 1 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 TAPE IS APPLIED TO PREVENT AN ELECTRICAL SHORT. MODEL : WD14070D6 / WD14070SD6...

  • Page 2: Table Of Contents

    CONTENTS 1. SPECIFICATION..........................3 2. FEATURES & TECHNICAL EXPLANATION ..................5 2-1.FEATURES..........................5 2-2.DETERMINE WASHING TIME BY FUZZY LOGIC ..............6 3. PARTS IDENTIFICATION ......................... 7 4. INSTALLATION ..........................8 5. OPERATION ........................... 14 6. WIRING DIAGRAM / PCB LAYOUT / PROGRAM CHART ............18 7.

  • Page 3: Specification

    1. SPECIFICATION WD14070SD6 ITEM POWER SUPPLY 220V-240V~, 50Hz PRODUCT WEIGHT 70kg WASHING 190W SPIN 380W ELECTRICITY DRAIN MOTOR CONSUMPTION STEAM HEATER 1200W WASH HEATER 2120W REVOLUTION WASH 46rpm SPEED SPIN No Spin / 400 / 800 / 1000 / 1400 OPERATION WATER PRESSURE 100 ~ 1000 kPa (1.0 kgf/cm ~ 10.0 kgf/cm...
  • Page 4 WD14070D6 ITEM POWER SUPPLY 220V-240V~, 50Hz PRODUCT WEIGHT 70kg 190W WASHING 380W SPIN ELECTRICITY DRAIN MOTOR CONSUMPTION 2120W WASH HEATER REVOLUTION WASH 46rpm SPEED SPIN No Spin / 400 / 800 / 1000 / 1400 100 ~ 1000 kPa (1.0 kgf/cm ~ 10.0 kgf/cm...

  • 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

    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 7: 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 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. 1. Unfasten 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 Bolt Unfasten 3.
  • Page 10 Type-C : Connecting one touch type hose to tap without thread 1. Unfasten 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 11 Connect Drain Hose. If the drain hose is not installed properly, the unit will not drain properly. This allows water to flow back into the unit which can cause odors. Refer to owner’s 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 12 Check the horizontality with a level (Gage). Step 1 If washing machine legs are loose or not fully attached, then tighten with the spanner wrench. Using the level, level the washing machine from front to back and side to side. A level Lower Tighten...
  • Page 13 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 14: Operation

    5. OPERATION (F1495BDS(1~9)) Cycle Selector Additional programs Rotate the ycle 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 15 EST. T ime remaining This display shows: a) the estimated time remaining in the cycle when operating. In case of abormal operation, error indications are displayed. ¥ see troubleshooting Rinse, Temp. Button Select water temperature based on the load type. By pressing the Rinse button, the Rinse type can be selected.
  • Page 16 (F1495BD(1~9)) Cycle Selector Additional programs Cycle selector Rotate the Time Delay : Allows the start of any cycle to be delayed knob to select the cycle for 3~19 hours. designed for different Crease Care : If you want to prevent creasing, select Crease types of fabric and soil Care option.
  • Page 17 EST. T ime remaining This display shows: a) the estimated time remaining in the cycle when operating. In case of abormal operation, error indications are displayed. ¥ see troubleshooting Rinse, Temp. Button Select a water temperature based on the type of load you are washing.

  • Page 18: Wiring Diagram / Pcb Layout / Program Chart

    6. WIRING DIAGRAM / PCB LAYOUT / PROGRAM CHART Wiring Diagram...
  • Page 19 PCB Layout (Main) G (Option) G SENSOR (Option)

  • Page 20: Troubleshooting

    7. TROUBLESHOOTING 7-1. CHECK 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 21: 7-3.How To Check The Water Level Frequency

    7-3. HOW TO CHECK THE WATER LEVEL FREQUENCY Touch the Temp. Pre Wash button simultaneously. If the knob is turned, the data view type is changed from 40 to 49 Data View Type : In case of ‘040’ The digits indicate the water level frequency. For example, if 255 is displayed the water level frequency is 25.5kHz (255 X 0.1).

  • Page 22: 7-5.How To Check The Vibration Sensor

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

  • Page 23: 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 all other errors, if the error is not resolved within 4 min., the power will turn off automatically and the error only will blink.
  • Page 24 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 34 WATER •...

  • Page 25: 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 26: Ue (Unbalance Error)

    UE (Unbalance Error) The few items of clothing will clump together Does the load lean toward one and their weight will be in one area of 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 27: 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 28 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 29: 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 under 21.3kHz? Data view type: ‘040’ * Water level frequency - Touch and Hold 'Pre Wash' & 'Temp.' simultaneously.

  • Page 30: Pe (Pressure Sensor S/W 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 right? Is the resistance of the Pressure Switch Replace the Pressure Switch.

  • Page 31: 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 32: Te (Thermistor (Heating) Error)

    tE (Thermistor (Heating) Error) Is the Connector connected correctly to Reconnect or repair the Connector. Main PCB, the Thermistor and the Heater? Or replace the Harness. Is the Harness right? Heater for Washing Heater for Steam Replace the Thermistor. Is the resistance of the Thermistor out of range 44 ~ 53 KΩ...

  • Page 33: Le (Motor Locked Error)

    LE (Motor Locked Error) [Pre Check] • Gentle wash cycles, such as Delicate and Wool, should be used only for light 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 34 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. In this case, you need to replace the stator assembly.

  • Page 35: Ae (Water Leakage)

    Water Leakage (AE) Some part have broken.(ex. Tub, Check if there is some water on the base ? Check if there is some water on the base ? dispenser, inlet hose, circulation hose, steam generator, pump, drain hose) Replace the broken part. Is safety switch assembled correctly to Assemble the safety switch.

  • Page 36: 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 37: Vibration & Noise During Spin

    Vibration & Noise during spin Have all the Transit Bolts been removed? Remove the Transit Bolts. Unfasten Refer to INSTALLATION. (Page 8)

  • Page 38: Detergent & Softener Does Not Flow In

    Detergent & Softener does not flow in Is water supplied? Refer to [IE (Water Inlet Error)] (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 39: 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 40 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 41: Part Inspection

    9. PART INSPECTION ARNING When Resistance (Ohm) checking the Component, be sure to turn the power off, When checking the resistance of the component, be sure to turn the power off, and do voltage discharge sufficiently. and do voltage discharge sufficiently. -1.

  • Page 42: 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 43 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 44: 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 45 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 46 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 47: 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 48: 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 49: Disassembly Instructions

    10. 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 50 MAIN PCB ASSEMBLY 1 Unfasten the screws from the parts displayed in the fig. 2 Disassemble the lower cover assembly. 3 Unfasten the screws from the parts displayed in the fig. 4 Slide the main PCB assembly in the direction displayed in the fig. 5 Disassemble the main PCB assembly.
  • Page 51 INLET VALVE 1 Disconnect the wiring connectors. 2 Disassemble the inlet valve by unfastening the screws from the valve holder. When reconnecting the connector VALVE (STEAM:Option) 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 ASSEMBLY 1 Open the door completely.
  • Page 52 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 53 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 54 AG (ALPHA GENERATOR) (OPTION) 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 1 Remove the rear cover.
  • Page 55 DRAIN PUMP ASSEMBLY 1 Disassemble the lower cover assembly. 2 Take out the main PCB assembly from the front of the washer. 3 Remove 3 clamps from the each hose. 4 Remove 3 screws from the base cabinet. 5 Disconnect the wire of pump. 6 Take out the drain pump assembly in the direction displayed in the fig.
  • Page 56 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. SAFETY SWITCH ASSEMBLY 1 Disassemble lower cover assembly. 2 Disassemble MAIN PWB ASSEMBLY 3 Disconnect the wiring connector. 4 Unfasten the screw from the part displayed in the fig and then turn the safety switch assembly to disassemble.
  • Page 57 REAR COVER ASSEMBLY Needed tool : (+) Electric driver Disassemble top plate assembly. 2 Remove screws that fasten the rear cover to the side cabinets. 3 Remove screws that fasten the rear cover to the base cabinet. 4 Remove screws that fasten the rear cover to the tub outer.
  • Page 58 REAR GASKET Needed tools :12,13 mm wrench, ( ) Clamp Jig, Cable Tie, (+) Electric driver Disassemble top plate assembly. Disassemble rear cover. Remove large and small gasket clamps using gasket clamp jig. Unfasten the nut that fastens the rear suspension to the base.
  • Page 59 FRONT GASKET Needed tools : ( ) Clamp Jig, (+) Electric driver Disassemble top plate assembly. Disassemble control panel assembly. Disassemble lower cover assembly. Disassemble cabinet cover assembly. Disassemble front gasket clamp 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 ).
  • Page 60 FRICTION DAMPER ASSEMBLY (RIGHT SIDE) Needed tools : Damper pin Jig, long nose, (+) Electric driver Disassemble the right side cabinet. Remove 2 damper holders from the tub bracket and the base holder. Disassemble friction damper assembly. SUSPENSION ASSEMBLY (RIGHT SIDE) Needed tools :12,13 mm wrench, (+) Electric driver The right side cabinet is disassembled.
  • Page 61 TUB BRACKET(RIGHT SIDE) Needed tool : 12,13mm wrench, (+) Electric driver Disassemble the top plate assembly. Disassemble the control panel assembly. Disassemble the lower cover assembly. Disassemble the cabinet cover assembly. Disassemble the right side cabinet assembly. Remove the bolt that fastens the suspension assembly to the tub bracket.
  • Page 62 VIBRATION SENSOR ASSEMBLY Needed tools :Nipper, Cable Tie, (+) Electric driver Disassemble the rear cover. Remove a cable tie. Disassemble vibration senser assembly.

  • Page 63: 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 A153 A102 A300 A154 A152 A151 A303 A135 A310 A150 K645 K640 K650 K610...
  • Page 64 11-2. THE EXPLODED VIEW OF CONTROL PANEL & DISPENSER ASSEMBLY F324 M400 F300 F462 F322 F321 F170 F160 F328 F432 F225 F430 F220 F441 F120 F215 F110 F210...
  • Page 65 10-3. THE EXPLODED VIEW OF DRUM & TUB ASSEMBLY F320 K160 K111 F310 K115 K105 K117 F467 K141 K140 K530 K510 K110 K150 K320 F461 K540 K520 K560 F462 K361 K123 K531 K130 K124 K120 K125 K121 K122 K350 K360 K143 K148 K147...
  • Page 66 P/No.: MFL62645328...

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