LG FH U1 BS Series Service Manual
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LG FH U1 BS Series Service Manual

LG FH 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 : FH*U1*BS(1~9)
website :
http://biz.lgservice.com
e-mail : http://LGEservice.com/techsup.html

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Summary of Contents for LG FH U1 BS Series

  • 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 ....................19 7-3.HOW TO CHECK THE WATER LEVEL FREQUENCY ...........20 7-4.ERROR DISPLAY ....................21 7-5.TROUBLESHOOTING WITH ERROR ................23...

  • Page 3: Specifications

    1. SPECIFICATION ITEM Refer to 1 page 220 V - 240 V ~, 50 Hz POWER SUPPLY PRODUCT WEIGHT Refer to the Owners Manual WASHING 190 W SPIN 380 W ELECTRICITY DRAIN MOTOR 30 W CONSUMPTION STEAM HEATER 1200 W WASH HEATER 2120 W WASH...

  • 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 suppl y cordis damaged , Drawer it must be replaced by the manufacturer or its service agents (For detergent and or a similarl y qualified person in fabricsoftener) 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 How to use washer Control panel Power Button Start/Pause Button LED display SmartDiagnosis™ function is Program Button Options available only for the products with a SmartDiagnosis™ mark. Power Program button • Touch and release your fingers to turn it •...
  • Page 13 How to use washer Options Pre Wash ( Steam (Wash and Softener) If the laundry is heavily soiled, “Pre Wash” Steam Wash features enhance washing course is effective. performance with low energy consumption. Steam Softener sprays the steam after 1. Touch the Power button. spinning cycle to reduce creases and make 2.
  • 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 AG Sensor Steam model only Some European models only Wiring Diagram of EBR783109XX Series Vibration sensor models only(Main or Display)

  • Page 18: Wiring Diagram / Pcb Layout

    6. WIRING DIAGRAM / PCB LAYOUT Main PCB ( P/N : EBR78310902 / EBR78310909) PCB POWER Heater Motor Stator Control AG SENSOR V ~ U / U ~ W Measure R impossible / W ~ V → R : 8 ~ 11Ω Here Just Check cut-off Long Short...

  • Page 19: Troubleshooting

    7. TROUBLESHOOTING 7-1. CHECK BEFORE SERVICE Before servicing ask the customer what the trouble is. Check the adjustments. (Power supply :220-240V~, 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 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 MOTOR LOCKED • The connector in the LEAD WIRE ASSEMBLY is ERROR not connected to the connector of STATOR ASSEMBLY. Reconnect or repair the connector. • Water leaks WATER LEAKAGE • The washer experienced a power failure POWER FAILURE Press the start/pause button...

  • 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% Automizing Pre wash Hot valve Main wash Resistance Inlet...

  • Page 24: Ie (Water Inlet Error)

    7-6. TROUBLESHOOTING WITH 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 requirements Standpipe Height 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 and the...

  • 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 - Touch and Hold 'Pre Wash' & 'Temp.' simultaneously. Drain out the water and then Is water continuously check the Air Chamber...
  • Page 29 Symptom Check Point 1. PRESSURE 1.Check Electric Wiring. SENSOR ERROR (PE) 2.Check Pressure sensor‘s Resistance. 3.Check Air chamber and Tube clogged. Pressure Sensor MAIN PWB Micom VT WH SB Resistance Pressure Main Sensor [Ω] 21 ~ 23 BL6 4 PRESSURE (1) ~ (3) BL6 5 (±...

  • Page 30: 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 31 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 32: 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 33: Te (Thermistor (Heating) Error)

    Symptom Check Point 1. HEATING Error (tE) 1.Check Electric Wiring. 2.Check Heater’s Resistance. 3.Check Thermistor ‘s Resistance. 4.Water leaked into the Thermistor’s connector. Wash Heater Steam Generator Heater Resistance Main Heater [Ω] Wash Heater BK 3 12 ~ 18 YL 3 (1) ~ (2) Steam Generator BL 3...
  • Page 34 Wash Thermistor Steam Generator Thermistor Resistance Remarks Main Resistance Remarks Main Thermistor Thermistor ℉ (℃) [kΩ] ℉ (℃) [kΩ] 39.5 86(30) 39.5 86(30) 26.1 104(40) 26.1 104(40) Wash NA3 4 12.1 140(60) 12.1 140(60) Thermistor NA3 5 158(70) 158(70) (1) ~ (2) Steam 203(95) 203(95)
  • Page 35 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 out of range 44 ~...

  • 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. NO POWER 1.Check Electric Wiri ng. 2.Check the Customer’s outlet. 3.Check Noise F ilter. 4.Check LED on in Main PWB Noise Filter Resistance Noise Filter [Ω] WH1 (1) ~ RD1 (3) WH1 (3) ~ RD1 (1)

  • Page 38: 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. 220~240V AC? Is Multi-plug socket used ? Don’t use Multi-plug socket.

  • Page 39: Vibration & Noise During Spin

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

  • Page 40: Detergent & Softener Does Not Flow In

    Detergent & Softener does not flow in Refer to [ W ater Inlet Error (IE) ] Is water supplied? (page 23) Is detergent & softener put in the correct compartment of the drawer? Only softener Put it in the Correct Position Main Wash Pre Wash (Powder)

  • Page 41: 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 42 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.

  • Page 43: Before Using The Tag On Function

    Before using the Tag On function • The Tag On function allows you to conveniently use the LG Sma rtDiagnosis ™ and Cycle Download features to communicate with your appliance right from your own smart phone. • To use the Tag On function: 1.
  • Page 44 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 must be higher than a certain level for...

  • Page 45: Part Inspection

    9. Part inspection...

  • Page 51: 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 52 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 53 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 or GRAY-BLACK VALVE (NORMAL-WASH) Y/BLACK ORANGE-BLACK VALVE (ATOMIZING) or BROWN-BLACK • Rating : 220/240V 50/60Hz •...
  • Page 54 CABINET COVER 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 55 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 56 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 57 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 58 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 59: Exploded View And Part List

    11. EXPLODED VIEW AND PART LIST 11-1.THE PART L IST OF CABINET ASSEMBLY A154 A140 A110 A103 A106 A102 A104 A152 A151 A150 A101 A141 A100 A430 A130 A440 A134 A410 A455 A131 A133 A450 A310 A303 A240 A200 A485 A201 A220 COLD (BLUE)
  • Page 60 11-2. THE EXPLODED VIEW OF CONTROL PANEL & DISPENSER ASSEMBLY F300 F462 F321 M400 F322 F160 F328 F432 F430 F225 F220 F441 F120 F110 F210...
  • Page 61 11-3 .THE EXPLODED VIEW OF DRUM & TUB ASSEMBLY K350 K360 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 K512 K131 K572 K571 F468 K340...
  • Page 62 P/No.: MFL69040501...

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