LG WD-20900 Service Manual Download

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CONTENTS

1. SPECIFICATIONS ............................................................................................................................. 3

2. FEATURES & TECHNICAL EXPLANATION ..................................................................................... 4

3. PARTS IDENTIFICATION ................................................................................................................. 6

4. INSTALLATION .................................................................................................................................. 7

5. OPERATION ................................................................................................................................... 12

6. WIRING DIAGRAM / PCB LAYOUT / PROGRAM CHART ............................................................ 14

7. TROUBLESHOOTING ......................................................................................................................18

7-1.BEFORE PREFORMING SERVICE ......................................................................................... 18

7-2.LOAD TEST MODE .................................................................................................................. 18

7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY ............................................................. 19

7-4.HOW TO KNOW TO TEMPERATURE OF EACH THERMISTOR AT OPERATING CONDITION .. 19

7-5.ERROR DISPLAY ..................................................................................................................... 20

7-6.TROUBLESHOOTING WITH ERROR ..................................................................................... 21

• IE (Water Inlet Error) .............................................................................................................. 21

• UE (Unbalanced Error) ........................................................................................................... 22

• OE (Water Outlet Error) .......................................................................................................... 23

• FE (Flow over Error) ............................................................................................................... 25

• PE (Pressure Sensor S/W Error) ............................................................................................ 26

• DE (Door open Error) ............................................................................................................. 27

• tE (Thermistor (Heating) Error) ............................................................................................... 28

• LE (Motor Lock Error) ............................................................................................................. 29

• DHE (Dry Heater Error) .......................................................................................................... 31

• Dry Heater Trouble ................................................................................................................. 32

• Dry Fan Motor Trouble ............................................................................................................ 33

8. TROUBLESHOOTING ELSE .......................................................................................................... 34

• No Power ................................................................................................................................ 34

• Vibation & Noise in spin ......................................................................................................... 35

• Detergent & Softener does not flow in .................................................................................... 36

• Water Leak ............................................................................................................................. 37

9. DISASSEMBLY INSTRUCTIONS ................................................................................................... 39

10. EXPLODED VIEW ......................................................................................................................... 47

Summary of Contents for WD-20900

Page 1: ...MACHINE SERVICE MANUAL CAUTION READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLES CORRECTLY BEFORE OFFERING SERVICE MODEL WD P1410BRD WD 20900 website http biz lgservice com e mail http LGEservice com techsup html ...

Page 2: ...51 P No MFL30574758 ...

Page 3: ...HERMISTOR AT OPERATING CONDITION 19 7 5 ERROR DISPLAY 20 7 6 TROUBLESHOOTING WITH ERROR 21 IE Water Inlet Error 21 UE Unbalanced Error 22 OE Water Outlet Error 23 FE Flow over Error 25 PE Pressure Sensor S W Error 26 DE Door open Error 27 tE Thermistor Heating Error 28 LE Motor Lock Error 29 DHE Dry Heater Error 31 Dry Heater Trouble 32 Dry Fan Motor Trouble 33 8 TROUBLESHOOTING ELSE 34 No Power 3...

Page 4: ...AVE ELECTRICITY CONSUMPTION WASHING SPIN DRAIN MOTOR STEAM HEATER WASH HEATER DRY HEATER REVOLUTION SPEED WASH SPIN No Spin 400 800 1000 1400 50rpm 0 3 10kgf cm 2 30 1000kPa Electronic Refer to the Rating Label 600mm W x640mm D x850mm H Cotton Cotton Quick Synthetic Delicate Hand Wash Wool Quick30 Refresh Allergy Care Baby Care Rinse Spin Rinse Normal Hold Bi Metal type 10 steps by sensor From 3 h...

Page 5: ... from pressing any button to change the settings during operation More economical by Intelligent Wash System Intelligent Wash System detects the amount of load and water temperature and then determines the optimum water level and washing time to minimize energy and water consumption Low noise speed control system By sensing the amount of load and balance it evenly distributes load to minimize the ...

Page 6: ...ater level in the tub Water supply is stopped when the water level to the preset level then washing program proceeds Spinning does not proceed until the water in the tub reduces to a certain level water temperature washing time rinse time the best washing performance spin rhythm time laundry amount FUZZY LOGIC selected washing temperature SENSING EFFECT PROCESSING DETERMINATION 2 4 THE DOOR CAN NO...

Page 7: ...ble Feet Shipping Bolts Control Panel Power Pulg Drain Pump Filter Drain Plug Lower Cover Cap If the supply cord is damaged it must be replaced by the manufacturer or its authorized service technician in order to avoid a hazard ACCESSORIES Inlet hose 2EA Spanner ...

Page 8: ... there should not be any foreign objects under the feet If the unit has foreign objects underneath the feet this will prevent the unit from being leveled properly and will cause vibrations and slipping Remove any foreign objects if any from underneath the machine and level unit properly See below for examples of foreign objects 1 Open the box and check appliance condition 2 horizontal Capet Paper ...

Page 9: ... upper connector up till the rubber packing is in tight contact with the tap Then tighten the 4 screws 3 Connect the water supply hose to the middle connector pushing the plate down In case the diameter of the tap is large remove the guide plate Turn the middle connector not to have water leaked Make sure that the rubber seal is inside the hose connector To separate the water supply hose from the ...

Page 10: ...or could be coming from the standpipe This odor can come up the drain hose and into the unit Pour a cup or two of bleach or vinegar down the home drain and let it sit for 24 hours before running another cycle This will help eliminate odor from the home drain If a cycle is started too soon after doing this it will not help the issue Connect the power plug to the wall outlet Avoid connecting several...

Page 11: ...t until there is no gap between floor and foot And only use adjustment rubber when difference at the leg adjustment is more than 10mm Place your right hand on the back right corner and your left hand on the front left corner of the unit then attempt to rock the unit from corner to corner Then move your right hand to the front right side and your left hand to the back left corner and attempt to roc...

Page 12: ...s clockwise and counterclockwise 5 Check automatic reverse turn 4 Check the water supply Check if water is supplied through the detergent dispenser 7 Check drain and spin Turn off Wash and Rinse after pressing the Start Pause button and start the machine again Check drain and spin Power off and then power on Check if the door can be opened after 3 minutes 8 Power off and open the door 9 Water remo...

Page 13: ...l Hold If you desire to leave fabrics in the machine without spinning after rinse to prevent wrinkling you may select Normal Hold by pressing the Option button Rinse Spin Use this option to rinse and then spin Additional programs Time Delay Allows the start of any cycle to be delayed for 3 19 hours Steam Wash By pressing the Steam Wash button Steam Function is selected light on Steam Wash button I...

Page 14: ...ept the Power button You can lock the washer while it is operating Dry Selector knob Dry programs selected by rotating dry knob Lower Temp Iron Dry Cupboard Dry Eco Dry Time 30 60 120 can be selected Tub Clean Tub Clean course can be set by pressing and holding Intensive and Pre Wash button simultaneously Tub Clean is special cycle to clean the inside of the washer Spin Temp Button To change the s...

Page 15: ...14 6 WIRING DIAGRAM PCB LAYOUT PROGRAM CHART ...

Page 16: ...asure Hz impossible Here Just check cut off Common Common Short Long Door Switch Drain Pump V U U W W V R 8 11Ω W U V Common Door Switch Measure R impossible here Ha 5 15 kΩ Hb 5 15 kΩ Pre Valve 3 5 4 5 kΩ AG Valve 3 5 4 5 kΩ LCD Display LCD Display LCD Display LCD Display LCD Display PCB Power LCD Display LCD Display Heater Next Page Thermistor for AG Common Pressure Switch AQUA Thermistor for Wa...

Page 17: ...16 PCB Layout Power Common Power Cord Noise Filter DRY AG Wash DRY AG Resistance 42 5 49 5 Ω Resistance 24 5 28 5 Ω Only For Dry Combo Wash ...

Page 18: ...17 Program Chart ...

Page 19: ...s 7 times 8 times 9 times 10 times 11 times 12 times 13 times 14 times 15 times 16 times Turns on all lamps and locks the door Tumble clockwise Low speed Spin High speed Spin Inlet valve for prewash turns on Inlet valve for main wash turns on Inlet valve for hot water turns on Inlet valve for steam turns on Inlet valve for bleach turns on Tumble counterclockwise Heater turns on for 3 sec Circulati...

Page 20: ... EACH THERMISTOR AT OPERATING CONDITION The digits means water level frequency 10 1 kHz ex 241 Water level frequency 241 x 10 1 kHz 24 1 kHz Press the Intensive and Option Left button simultaneously Press the Temp and Option Left button simultaneously Thermistor in tub temperature ...

Page 21: ...s over flowing over 8 level If is displayed the drain pump operates to drain the water automatically Page 25 4 PRESSURE SENSOR S W ERROR The sensor pressure switch is out of order Page 26 5 DOOR OPEN ERROR In case of operating the reservation function or the other function with door opened Close the door then the error display is resolved The door switch is out of order Page 27 6 THERMISTOR HEATIN...

Page 22: ...2KHz Reconnect or repair the Connector Or replace the Harness Replace the Inlet Valve Is the Connector connected correctly to the Main PCB and the Inlet Valve Or is the Harness alright Check the Air Chamber and the Tube clogged And When you check the water level frequency again if it is over 26 2KHz you replace the Pressure switch YES YES NO NO Replace the Main PCB NO YES YES NO NO Is the each res...

Page 23: ...ly Page 7 Is the laundry mixed The few items of clothing will clump together and their weight will be in one place on the drum throwing the weight off during spin mode So add some laundry to overcome UE error And rearrange load to allow proper spinning Try rearranging the laundry in drum Or the laundry is separated by size type and color Separate by size type and color YES YES NO NO YES ...

Page 24: ...prevents proper drainage but also will promote bacteria growth and cause odors This drain filter should be cleaned once a month How to disassemble and clean pump filter Open the Cover by coin or finger only new model Cover Drain water by removing the hose cap Disassemble the pump filter by turning the filter cap counterclockwise Filter clogged by foreign objects Assemble close cap Pump Filter filt...

Page 25: ...ut water adequately if the standpipe exceeds 1 0 m In this case water may flow back into the washer Check the Air Chamber and the Tube clogged And When you check the water level frequency again if it is over 25 5KHz you replace the Pressure switch YES NO Reconnect or repair the Connector Or replace the Harness NO Replace the Main PCB NO Replace the Pump Motor Is the resistance of the Pump Motor ou...

Page 26: ...line and is the water level frequency 26 2Khz Water level frequency Press and Hold Intensive Option Left simultaneously Replace the Inlet Valve assembly YES If FE is displayed again then replace the Pressure Switch If FE is displayed again then replace the Main PCB Check the Air Chamber and the Tube clogged NO NO YES Over Flow Error FE The digits means water level frequency 10 1 kHz ex 241 Water l...

Page 27: ...in PCB and the Pressure Switch Or is the Harness alright Reconnect or repair the Connector Or replace the Harness Check air chamber and remove the foreign material Replace the Pressure Switch YES YES NO Is the resistance of the Pressure Switch out of range Pin1 Pin3 21 23Ω NO NO YES Pressure Sensor S W Error PE ...

Page 28: ...witch NO Does the Spring of Latch Hook actuate Door Open Error dE YES YES YES NO Scratch by Latch Hook Touching or Is the Connector connected correctly to the Main PCB and the Door Switch Or is the Harness alright Does the Door Switch operate as follows Door Locking time 1 8 sec Check the time between from input the power to parts move up then Door locked Door Releasing time 25 100 sec Check the t...

Page 29: ...or Or replace the Harness Replace the Thermistor YES Replace the Heater YES NO Is the resistance of the Heater out of range 24 5 28 5Ω for Washing or 42 5 49 5Ω for Steam Page 19 Note Thermistor Spec NO NO Thermistor Heating Error tE S P E C Temp 30 C 40 C 60 C 70 C 95 C 105 C Resistance kΩ MIN 36 35 39 45 42 72 24 20 26 05 27 97 11 43 12 12 12 82 8 088 8 514 8 940 3 544 3 791 4 045 2 617 2 816 3 ...

Page 30: ...g the hall sensor Is the Connector connected correctly to the Main PCB and the Motor Or is the Harness alright YES NO YES YES YES YES NO Disassemble the Rotor Are the Magnet of rotor cracked or broken Ha Common 5 15 kΩ Hb Common 5 15 kΩ Replace the Main PCB Press the Power button Start Pause button Does the Drum stop when the start pause button is pressed to start the cycle Or Sometimes does the D...

Page 31: ...the hooks of stator as picture red circled 2 Push down the Hall sensor and assemble to the hook for sure Caution If you disassemble by force not following the directions the hooks of stator red circled might broke up Hence need change of stator assembly So disassemble cautiously 1 Assemble the Hall Sensor 2 Note Hall Sensor Part No 24 25 6501KW2001A 27 6501KW2002A ...

Page 32: ... Fan Assy and Dry Duct Upper and clean foreign object in Duct and Fan Is the Connector connected correctly to the Main PCB and the Dry Heater or Fan Motor Or is the Harness alright Reconnect or repair the Connector Or replace the Harness Replace the Thermistor Clean the Bellows YES NO Check for Dry Heater trouble Page 24 Check for Dry Fan Motor trouble Page 25 Dry Heater Error dHE YES YES NO NO ...

Page 33: ...stance of Dry Heater out of range 33 37Ω Replace the Dry Heater Dry Heater Trouble YES YES NO Replace the Thermostat NO Replace the PWB assembly main NO When checking voltage between connectors 1 2 on drying is the voltage AC 220 240V as the figure 1 2 ...

Page 34: ... PCB and the Dry Heater or Fan Motor Or is the Harness alright Reconnect or repair the Connector Or replace the Harness Replace the Dry Fan Motor When checking voltage between connectors 1 2 on drying is the voltage DC 20 30V as the figure Dry Fan Motor Trouble YES YES NO NO Replace the PWB assembly main NO V U W 1 2 ...

Page 35: ...e Connector connected correctly to the Main PCB and the Noise Filter Or is the Harness alright Noise Filter Main PCB Noise Filter PCB Reconnect Power Plug firmly Check the fuse or reset the circuit breaker Don t use Multi plug socket Use Single Plug socket for washing machine YES YES Reconnect or repair the Connector Or replace the Harness Check connectors otherwise Replace Display PCB Check and r...

Page 36: ... Vibration Noise In Spin Have all the Transit Bolts and the Base Packing been removed NO Remove the Transit Bolts and the Base Packing Washer Base Packing Packing Support YES Refer to INSTALLATION Page 7 ...

Page 37: ...er put in the correct compartment of the drawer NO Refer to Water Inlet Error IE page 21 NO Put it in the Correct Position Reference Amount of Detergent Softener Detergent NO OK YES YES Is water supplied Is the Detergent caked or hardened Pre Wash Powder YES Softener YES Main Wash Powder Only softener ...

Page 38: ...k Is detergent softener put in the correct compartment of the drawer NO Put it in the Correct Position Replace the Dispenser Tray Reference Amount of Detergent Softener Detergent NO OK Is the Dispenser Tray Damaged or warped 1 Water Leak from Dispenser Is the Detergent caked or hardened Softener YES YES NO ...

Page 39: ...cked split Replace the damaged parts Replace the Inlet Hoses Clean the periphery of Gasket and Door regularly 3 Unknown Water on Floor YES Is the washer horizontal Adjust the height of washing machine to be kept horizontally Page 7 NO Are the drain filter and manual drain hose open YES NO Check Turn the filter cap clockwise to close YES YES NO ...

Page 40: ...pulled back and then upward to arrow direction 1 Pull out the drawer and unscrew 2 screws 2 Lift the side the Control Panel Assembly and pull it out 1 Two screws is unscrewed 2 Push out PANEL ASSEMBLY CONTROL after Push the hook below 1 The PWB assembly Display is disconnected 2 When 7 screws are unscrewed on the PWB insulator and the PWB assembly Display is disassembled from the PWB insulator CON...

Page 41: ...EMBLY MAIN 1 The plate assembly Top disassembled 2 The cover of PWB assembly Power is removed Push the hook bellow 4 Disconnect connector from the PWB 5 Two screw is unscrewed PWB ASSEMBLY POWER 1 The plate assembly Top are disassembled 3 Two screws are unscrewed 2 Pull the drawer to arrow direction 1 The hose clamps and the hose are disassembled 2 The ventilation bellows are disassembled on the t...

Page 42: ...nt 3 5 4 5kΩ When reconnecting the connector 1 Open the door completely 2 Remove the three screws from the hinge When removing the Door Assembly it is necessary to hold the Bracket that is inner of the Cabinet Cover First prepare a bucket to put in the remained water Pull it out from hose WH BK BK GY WH BK VT BK YL BK BK BK WH BK INLET VALVE DOOR Removing method of remained water ...

Page 43: ...crews 1 Two screws is unscrewed 3 Unscrew the screws from the lower cover 2 The cabinet cover clamp is removed by special jig for service and the gasket is released 3 Two screws are unscrewed 4 Unscrew all the screws on the upper and lower sides of the CABINET COVER 1 2 3 Lift the side the Control Panel Assembly and pull it out CABINET COVER ...

Page 44: ... Check the time between from off the power to parts move down then Door released 1 1 1 1 Lift and separate the cabinet cover 1 The cabinet cover clamp is removed and the gasket is released 2 Two screws are unscrewed 3 The Door Lock S W is disconnected form the wiring connector and the strap NOTE When assembling the CABINET COVER connect the Door S W connector SWITCH ASSY DOOR LOCK ...

Page 45: ...ck cover 2 After loosening the bolt Rotor pull out the rotor 1 Remove the 6 bolt from the stator 2 Disconnect the 2 connectors 1 Remove the hinges Damper at the Tub 3 The hinge at the base is pulled off To arrow direction 2 The Hinge Damper at the base is pulled off pressing on the snaps at the sharp end TSG TURBO STEAM GENERATOR ROTOR ASSEMBLY STATOR ASSEMBLY FRICTION DAMPER Heater for STEAM Rati...

Page 46: ...r insert the heater to heater clip on the bottom of tub and check the position of wire color 3 Remove cap Remaining Hose 4 Disconnect the wiring 5 Three screws are unscrewed from the cabinet 6 Remove the pump to arrow direction PUMP HEATER Rating 220 240V 50Hz Resistant 162 176Ω Heater for Washing Rating 230V 2000W Resistant 24 5 28 5Ω CAUTION ...

Page 47: ...oin etc by inserting long bar in the hole WHEN FOREIGN OBJECT STUCK BETWEEN DRUM AND TUB 1 Unscrew 4 screws from the back cover 2 Disconnect the wiring connector 3 First Press hook and turn the safety switch assembly switch assembly safety SWITCH ASSEMBLY SAFETY ...

Page 48: ...VIEW AND PART LIST 10 1 THE PART LIST OF CABINET ASSEMBLY A141 A150 A131 A130 A440 A134 A133 A303 A300 A310 A270 A140 A154 A153 A103 A102 A104 A110 A101 A100 A430 A410 A455 A450 A135 A200 A201 A220 A460 A152 A151 A240 ...

Page 49: ...48 10 2 THE EXPLODED VIEW OF CONTROL PANEL DISPENSER ASSEMBLY F225 F220 F215 F210 F216 F110 F120 F441 F430 F328 F432 F160 M400 F327 F300 F330 F462 F322 F321 F340 ...

Page 50: ...UB ASSEMBLY F140 K411 K140 K510 K512 K560 F145 K135 K130 K131 K530 K340 K550 F467 K611 K610 K105 K410 F464 K123 K143 K360 K350 K351 K122 K121 K125 K320 K115 K346 K344 K342 F468 F466 K520 K540 F461 K141 M105 K146 K110 K111 K410 F310 F320 ...

Page 51: ...50 10 4 THE EXPLODED VIEW OF DRYER M130 M120 M230 M215 M210 M216 M100 M240 M101 M220 M111 M110 M140 ...

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