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LG F1 U1 BS 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 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 : F1＊U1＊BS(1~9)
website :
http://biz.lgservice.com
e-mail : 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 TAPE IS APPLIED TO PREVENT AN ELECTRICAL SHORT.

  • Page 2: 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 ....................17 7. TROUBLESHOOTING ........................19 7-1.BEFORE PERFORMING SERVICE ..................19 7-2.LOAD TEST MODE ........................

  • Page 3: Specifications

    1. SPECIFICATION ITEM Refer to 1 page POWER SUPPLY 220 V - 240 V ~, 50 Hz F14U1(T or L)BS(1~9) : 69kg PRODUCT WEIGHT F1＊U1(H\W\N\M\L)BS(1-9):65kg WASHING 155 W SPIN 490 W ELECTRICITY DRAIN MOTOR 37 W CONSUMPTION WASH HEATER 1700 W WASH 46 rpm REVOLUTION...

  • Page 4: Features & Technical Explanation

    2. FEATURES & TECHNICAL EXPLANATION 2-1. Product Features Inverter Direct Drive system The advanced 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. Combined with a controlled spin speed and the ability of the drum to rotate both left and right, the wash performance of the machine is greatly improved, giving you perfect results every time.
  • 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 Power plug Transit bolts • If the supply cord is damaged, Drawer it must be replaced by the manufacturer or its service agents (For detergent and or a similarly qualified person in fabric softener) order to avoid a hazard. Control panel Drain hose Drum...

  • 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 9 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 10 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 11 Test operation Preparation Touch the power button. Touch 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 12: Operation

    5. OPERATION...
  • Page 14 How to use washer Delay ( Rinse ( You can set a time delay so that the washing • Rinse plus ( ) : Add rinse once. machine will start automatically and finish • Rinse Hold ( ) : The course is paused after a specified time interval.
  • Page 15 How to use washer Child Lock Select this function to lock the buttons on the control assembly to prevent tampering. "Child Lock" can be set only during the washing cycle. Locking the control panel 1. Touch and hold the Child Lock button for 3 seconds.
  • Page 16 How to use washer Tub Clean ( Tub Clean is a special cycle to clean the inside of the washing machine. A higher water level is used in this cycle at higher spin speed. Perform this cycle regularly. 1. Remove any clothing or items from the washer and close the door.

  • Page 17: Wiring Diagram / Pcb Layout

    6. WIRING DIAGRAM / PCB LAYOUT Wiring Diagram...
  • Page 18 PCB Layout (Main)

  • Page 19: Troubleshooting

    7. TROUBLESHOOTING 7-1. CHECK BEFORE SERVICE Before servicing ask the customer what the trouble is. Check the adjustments. (Power supply :220-240 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 20: 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. Keeping touch, the digits indicate the water level frequency.

  • Page 21: 7-4.Error Display

    7-4. 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 22 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 36 •...

  • Page 23: 7-5.Troubleshooting With Error

    7-5. TROUBLESHOOTING WITH ERROR Symptom Check Point 1. INLET VALVE 1.Check Electric Wiring. ERROR 2.Check Inlet valve’s Resistance. 3.Check Inlet valve clogged. 4. Voltage of the inlet valve’s connector. -. Valve running : 120Vac ± 5% Pre wash Automizing B L 1 Main wash Steam Resistance...

  • Page 24: Ie (Water Inlet Error)

    Water Inlet Error (IE) [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 (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 26: Oe (Water Outlet Error)

    Water Outlet Error (OE) 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 under 21.3kHz? * Water level frequency Pre Wash Temp ’ - Touch and Hold’ ‘ &‘ simultaneously. Drain out the water and then Is water continuously check the...

  • Page 29: 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 Is the Harness alright ? Is the resistance of the Pressure Switch Replace the Pressure Switch out of range? [Pin1 ~ Pin3]...
  • Page 30 Symptom Check Point 1. PR ESS URE 1.C heck Electric Wiring. SE NSOR ERROR ( PE ) 2.C heck Pressure s ensor‘s Resist ance. 3.C heck Air chamber and T ube clogged. Press ure S ensor MAIN P WB Micom VT WH SB R esistance Press ure...

  • Page 31: De2 (Door Open Error)

    Door Open Error (dE2) 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 Symptom Check Point 1. DOOR OPEN 1.Check Electric Wiring. ERROR (dE) 2.Check latch hook spring. (Cracked) 3.Check Door switch‘s Resistance. 4.Check Voltage of Door switch’s connector. Door switch Result Remarks (Type2) (2) ~ (4) 700~1500Ω At 77 (25 ) At 77 (25 ) 90~120Ω...

  • Page 33: 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 Is the Harness alright ? Heater for Washing Heater for Steam Replace the Thermistor Is the resistance of the Thermistor...
  • Page 34 Sym ptom Ch eck Point r o r . Check Electric Wring 2. Check Heater Resistance k Thermistor’s Resistance Water leaked into the Thermistor’s commector. Wash H ea ter R esistance Main H ea ter [Ω ] Wash H ea ter BK 3 12 ~ 18 YL 3...
  • Page 35 Wash Thermistor Resistance Remarks Main Thermistor ℉ (℃) [kΩ ] 39.5 86(30) 26.1 104(40) Wash NA3 4 12.1 140(60) Thermistor NA3 5 158(70) (1) ~ (2) 203(95) 221(105)

  • Page 36: 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 37 Symptom Check Point 1. LOCKED MOTOR 1.Check Electric Wiring. ERROR (LE) 2.Check Motor’s Resistance. 3.Check Hall sensor ‘s Resistance. 4.Check Hall sensor ‘s Voltage. Motor Hall Sensor (1)(2)(3)(4)(5) Hall Main PWB Result Sensor (1) ~ (5) NA1 3 ~ NA1 1 8 ~ 12 k (2) ~ (5) NA1 2...
  • Page 38 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 39 Symptom Check Point 1. NO POWER 1.Check Electric Wiring. 2.Check the Customer’s outlet. 3.Check Noise Filter. 4.Check LED on in Main PWB Noi se Fi l t er Resistance Noise Filter Ω WH1 (1) ~ RD1 (3) WH1 (3) ~ RD1 (1)

  • Page 40: Troubleshooting Without Error Codes

    8. TROUBLESHOOTING WITHOUT ERROR CODES PF (Power Failure or 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...

  • Page 41: Vibration & Noise During Spin

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

  • Page 42: Detergent & Softener Does Not Flow In

    Detergent & Softener does not flow in Is water supplied? Refer to [ Water Inlet Error (IE) ] (page 23) Is detergent & softener put in the correct compartment of the drawer? Put it in the Correct Position . Reference (Amount of Detergent & Softener) Detergent Softener NO!!

  • Page 43: Water Leak

    Water Leak 1. W at er Leak f r om Di spenser 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? Reference (Amount of Detergent &...
  • Page 44 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? Replace the Inlet Hoses Check!!

  • Page 45: Before Using The Tag On Function

    Be fore using t he Ta g On func t ion • The Tag On function allows you to conveniently use the LG SmartDiagnosis™ and Cycle Download features to communicate with your appliance right from your own smart phone. • To use the Tag On function: 1.
  • Page 46 NFC-equipped phones may be unable to transmit successfully. • Press in the LG Smart Laundry & DW app for a more detailed guide on how to use the Tag On function. • NFC reading performance of your smart phone is must be higher than a certain level for...

  • Page 47: Part Inspection

    9. Par t i nspect i on...
  • Page 52 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 54: 9-5.Inlet Valve Assembly

    Ω...

  • Page 55: 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 56 PWB ASSEMBLY(MAIN) 1 Unscrew two screw of the PWB 2 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. 4 Clamp 5 Cutting cable ties and the ventillation hose are disassembly on the dispenser...
  • Page 57 INLET VALVE 1 Disconnect the wiring connector. 2 Remove the valve by two screws of the valve holder. When reconnecting the connector GRAY/ BLACK-BLACK VALVE (PRE-WASH) / BLACK-BLACK VALVE (NORMAL-WASH) WHITE PURPLE/ BLACK-BLACK (STEAM) VALVE VALVE 4 (ATOMIZING) BLACK/ JACINTH •...
  • Page 58 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 1 Two screws are unscrewed. 2 Push out PANEL ASSEMBLY, CONTROL after Push the hook( ) below.
  • Page 59 4 Lift and separate the cabinet cover. NOTE: When assembling the CABINET COVER, connect the Door S/W connector. SWITCH ASSY, DOOR LOCK 1 Two screws are unscrewed and disassembly cabinet cover. 2 The Door Lock S/W is disconnected form the wiring connector and the strap.
  • Page 60 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 Hall Sensor U V W Common •...
  • Page 61 PUMP 1 Disassembly Top Plate, Control Panel, Drawer Panel Assembly, Cabinet Cover Assembly. 4 Remove pump outlet hose. Bellows 5 Remove tub pump bellows. 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 62 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.

  • Page 63: Exploded View And Part List

    10. EX PLO D ED VIEW AN D PART LI ST 10-1. TH E PART L I ST O F CAB INET ASS EM BLY A154 A140 A134 A103 A102 A104 A110 A152 A151 A150 A141 A101 A100 A130 A430 A440 A410 A201...
  • Page 64 10-2. THE EXPLODED VIEW OF CONTROL PANEL & DISPENSER ASSEMB Y F300 F160 F462 F321 M400 F328 F432 F430 F225 F441 F220 F120 F110 F210...
  • Page 65 10-3 THE EXPL O DED VIEW OF DRUM & TUB ASSEMBLY K361 K351 K360 K350 K143 K123 F140 K411 K121 K122 K410 K125 F320 K320 K111 F310 F466 K110 K141 F464 K140 K105 K410 K115 K130 K135 K610 K510 K611 K530 K131 F468...
  • Page 66 P/No.: MFL42714048...

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