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LG WM3670H A Series, Service Manual

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MODELS : WM3670H*A

WASHING MACHINE

SERVICE MANUAL

READ    THIS    MANUAL       CAREFULLY       TO       DIAGNOSE

PROBLEMS    CORRECTLY    BEFORE  SERVICING        THE      UNIT.

CAUTION

CONFIDENTIAL

Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication, modification, copying or 
transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity 
from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in 
this Service Manual.

Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

Summary of Contents for WM3670H A Series

Page 1: ...ctronic means publication modification copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual The material covered by this prohibition includes without limitation any text graphics or logos in this Service Manual Copyright 2016 2017 LG Electronics Inc All right...

Page 2: ...afety Caution 19 7 2 Error Mode Summary 19 20 7 3 Troubleshooting With Error 21 27 7 5 Before using the Tag On function 3 7 4 Troubleshooting Else 28 3 8 Component Testing Information 3 8 1 Filter Assembly Line Filter 3 8 2 Door Look Switch Assembly 3 36 8 3 Stator Assembly 3 8 4 Pump Motor Assembly 8 5 Inlet Valve Assembly 8 6 9 Disassembly Instructions 4 10 Exploded View 5 5 11 Wiring Diagram 5 ...

Page 3: ...42 PSI 100 980kPa Electronic 4 5 DOE 27 W X 29 3 4 D X 38 11 16 H 51 D door open up to 19 hours PTC Solenoid 10 steps by sensor Incorporated Incorporated Incorporated Incorporated 240 W 80 W 1000 W 46 rpm 0 1 300 rpm Blue White Silver AC 120 V 60 Hz 196 2lb 89kg To reduce therisk of inju ry topersons adhere toall industry recom flong o e s u e h t g n i d u l c n i s e r u d e c o r p y t e f a s ...

Page 4: ...tomatically detects the load and optimizes the washing time Child Lock The child lock prevents children from pressing any button to change the settings during operation SMART DIAGNOSIS TM Should you experience any technical difficulty with your washing machine is capable of producing multiple distinct different motions for optimal washing performance with very little noise and vibration The motor ...

Page 5: ...he water in the tub drains to a certain level water temperature washing time rinsing time the best washing performance spin rhythm time load size NEURO FUZZY selected washing temperature SENSING EFFECT PROCESSING DETERMINATION The door can be opened by pulling the door handle whenever washer is not in operation When the cycle is completed the DOOR LOCKED light will turn off If a power failure has ...

Page 6: ...rols of the washer while washing CHILD LOCK lasts after the end of cycle If you want to deactivate this function s d n o c e s 3 r o f n o t t u b h s a W e r P e h t d l o h d n a s s e r P 2 7 NFC Tag On Function The Tag On function can only be used with smart phones equipped with the NFC function and based on the Android operating system OS Position your smart phone so that the N FC antenn a on...

Page 7: ...G G G G G SG G G G G G G G G G G G G G G U w G Gh w G G z G w G k G G G k G G k t Gk G w j G G k G s G k G w O G P z Gr O G P h u T G j G G G G G G l G G O G G G P p Gh G v Gh y Gh GO G P ˍGG y G G G G UGp G G G G GsnG U G zaG U U V o V G G w Gu ˍG YX mkZ X GaGo G G ˍG YX mkZ X GaGj G G Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 8: ...ether it functions correctly STANDARD INSTALLATION The appliance should be installed as follows Remove the 4 shipping bolts with the supplied wrench Remove the lower bolts fist It is easier that way Keep the shipping bolts and spanner for future use Insert the 4 caps provided into the hole Turn clockwise to raise counterclockwise to lower Turn the leveling feet to adjust the appliance REMOVE THE S...

Page 9: ...prevent leaks Install the inlet hose to correct temperature water tap Otherwise it cause drips on the drawer panel handle and drawer panel HOW TO CONNECT THE INLET HOSE CONNECT THE DRAIN HOSE Make sure that the hose is not twisted The end of the drain hose should be placed less than 96 from the floor Avoid submerging the end of the hose Copyright 2016 2017 LG Electronics Inc All rights reserved On...

Page 10: ...ckwise 5 Check the automatic reverse rotation 4 Check the water supply Check if water is supplied through the detergent dispenser 7 Check the drain and spin functions Power off and the power on Press the SPIN SPEED button Press the START PAUSE button Check the spin and drain functions Listen for a click to determine if the door is unlocking 8 Press the START PAUSE button 9 Water removal If SERVICE...

Page 11: ...WM3670H A ENGLISH 5 OPERATION 5 1 CONTROL PANEL FEATURES Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 12: ...G G G G G Gv Vv U z Gp ˍ p G G G G G G G G G U j Gz Gr ˍ y G G j G G G G G G G G G G G G U z Vw ˍ G G G z Vz G G U Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 13: ...d Child Lock Use this option to prevent unwanted use of the washer or to keep cycle settings from being changed while the washer is operating Water Plus To add water during wash and rinse cycle event wrinkles Wash Temp Spin speed Soil Level Signal Button t 4FMFDU B XBUFS UFNQFSBUVSF CBTFE PO UIF UZQF PG MPBE ZPV BSF XBTIJOH t 5P DIBOHF UIF TQJO TQFFE QSFTT UIF 4QJO 4QFFE CVU tPO SFQFBUFEMZ UP DZDM...

Page 14: ...z z j VG u j SG SG SG SG SG S G l Go G o ୖ j Gj G l Go o ୖ t s u Gz o u ୖ s z z z z z z o Gk o G Gj m o Ì j Gj l Go ୖ o s u Gz o ୖ u s z z z z z z w Uw k G V S T G SG V G SG o ୖ j Gj o t ୖ s o u ୖ s z z z z z k k G V S SG G G G j ୖ Gj G t ୖ s u Gz o u ୖ s z z z z o G ୖ j Gj G l Go ୖ o t s u Gz o u ୖ s z z z z z z G s G G G o ୖ j Gj l Go ୖ o t s u Gz o u s ୖ z z z z TG G j G G G G G G G G G G S G G...

Page 15: ...G G G G G G UGw G G G GwylG hzoG G GZ G G G G G G G G G G G G G G G G G G UGh G G G G G G GvuVvmmG uv laGjopskGsvjrG G G G G G UGp G G G G G G S w G G G GwylG hzoG G GZG UG X G G G G G G G G G G G G G G G G G G G U G G G G G G G G GX G G G G UGw G Gz V w G Gw G G G G G G G U Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 16: ... becomes lower than selected because of re supplied water the heating starts again 7 Washing Fuzzy logic decides washing time according to the laundry load water temperature and other factors 8 Drainage A pump motor drains the water from the drum After sensing drained water amount by water level frequency spin starts When a heating course is selected stay cooling process is performed to decrease t...

Page 17: ...e Rinsing process 15 Last drainage After spin finishes and power is not supplied to motor the drum rotates by remaining spin power If rinse hold is selected the drainage is not proceeded after rinse finishes 16 Disentangling The same as item 9 17 Intermittent spin The same as item 10 18 19 20 21 22 Main spin1 The same as item 11 Main spin2 At the end of a main spin the spin speed will reach the se...

Page 18: ...6 TEST MODE SPIN SPEED SOIL LEVEL WASH RINSE DELAY WASH Turns on all lamps and locks the door TXU TYU TZU 18 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 19: ...7 TROUBLESHOOTING TXU TYU 4 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 20: ...jGohyulzzG G GumjGwjiG hzzltis G Gkpzwsh GwjiGhzzltis G G G G G O G PU GumjGwjiGhzzltis G G G G G G O G PU GumjGllwyvtG G G G U G jG G G G G G G G GGGG G Gt U umjG G G G U Gp G G G G U G G G G G G G G G GGGG G Gt U _ llwyvtG G G G U k G G G Gz hy Vwh zlG G G G G Gs G Gt U G G G SG G G G G UG XW umjGtvk sl lyyvy wv lyGmhps yl umjG lyzpvu lyyvy XX XY lyyvy z tw vt jh zl Copyright 2016 2017 LG Electr...

Page 21: ...7 3 TROUBLESHOOTING WITH ERROR INLET VALVE ERROR 54 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 22: ...55 55 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 23: ...agnet cracked part of wire part of motor Motor Yes No Yes Yes Magnet Replace the STATOR Is the resistance values in the range of 5 to 15 U V V W W V U 1 V 2 W 3 After pull out the RD4 connector check the terminal of the connector in wire Red 3P male No Replace the MAIN PWB ASSEMBLY Check the IPM in the controller No Is LE ERROR displayed t Gk Copyright 2016 2017 LG Electronics Inc All rights reser...

Page 24: ...ken Replace the DOOR SWITCH ASSEMBLY No Yes Does the spring of Latch Hook actuate Replace Door Assembly Yes No Note Environmental check list 1 The machine must operate with all the doors completely closed and locked 2 The washing area must operate with a water temperature not higher than 45 Celsius and must not have more amount of supplied water than it should Is dE ERROR displayed 57 Copyright 20...

Page 25: ...UNBALANCE ERROR OVER FLOW ERROR Note Installation check list WASH RINSE DELAY WASH 58 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 26: ...he resistance of the pressure sensor out of range pin 1 pin 3 21 23 10 Replace the pressure switch No Yes Is the AIR CHAMBER and the tube clogged Replace the MAIN PWB assembly Fix the air chamber and remove the foreign material Yes Is PE ERROR displayed 59 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 27: ... multi outlet power strip enough Avoid connecting several electric devices Is the supplied voltage 120V AC 10 15 Alternate with explanation Yes Yes No Is the connector connected to PCB Noise filter disconnected or disassembled Reconnect or repair the connector No Replace the MAIN PWB ASSEMBLY Yes No Is LED on while the power is on Replace the DISPLAY PWB ASSEMBLY Display PWB Connecting connector M...

Page 28: ...BUTTON DOESN T WORK 28 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 29: ...5 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 30: ... 3 Prewash Compartment 4 Main Wash Compartment Is the detergent caked or hardened Is water supplied Check the wiring No Are receptacles correctly connected to the terminals of the INLET VALVE ASSEMBLY Put the detergent in the correct place Clean the dispenser Yes Yes No Pre wash Main wash Detergent 1 4 3 2 63 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purp...

Page 31: ...ment of the drawer Put it in the correct compartment Clean the cap and container No Yes Yes Yes Secure the bolt Is there friction noise coming from the motor Check hall sensor Replace If defective Then check stator Replace if necessary Check rotor for broken magnets Replace rotor if necessary Yes No Yes 1 Liquid chlorine Bleach Compartment 2 Liquid fabric Softener Compartment 3 Prewash Compartment...

Page 32: ...umjG G G G UGy G G G G G G G G G U G G Gv G G侩G Gv G Gs G G G Gv G G G G GslkG G G G G UG G G G G G G G G G G G Gv G G G GsnGz Gk SGj G k SG Gs Gz G G G GsnG z Gs Mk G U G G G G Gv G SG G G G G G G GumjG G G G G G G G G G G G G G G v G G G G UGp G G G G G G G G GumjG SG G G G G G G G G G G G G G G G U i G G G G GumjSG G G G G G G SG G G G G G G G G G G G G G SG G G G G UGp G G SGumjT G G G G G GG ...

Page 33: ...ltage discharge sufficiently WARNING Wiring diagram Circuit in the MAIN PWB Wiring Diagram Vac MAIN PW B A SSE MBLY FUSE RD1 WH1 LI L2 R I C I C2 C3 3 2 1 3 2 1 Test points and Result Test Points Result WH 1 to RD 3 WH 3 to RD 1 0 0 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes OZP OXP oX OZP OXP ykX ...

Page 34: ...locked Door lock is detected when switches in terminal 4 5 are set closed CAM rotation will forcibly clear off the connection The maximum allowable number of impulse authorizations is 2 Upon the third authorization of the impulse the position of CAM goes back to the door open position Authorizing the impulse occurs in 4 5 seconds upon input for max performance and two authorization processes are a...

Page 35: ...est Points 2 to 4 3 to 4 4 to 5 2 to 4 Result 700 1500 60 90 Infinity 120 Vac Remarks At 77 F 25 C At 77 F 25 C Voltage Input 68 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 36: ...Result Windings steps in either direction Thereare36poleson the stator 12permanent magnetsspacedaround the rotor There are no brushesto wear out Unlike a more traditional brushlessmotor the rotor surrounds the stator rather than being attached to it Test Points Result 1 to 2 2 to 3 3 to 1 5 15 5 15 5 15 WINDINGS 1 2 3 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and ser...

Page 37: ...Vac 2 1 4 3 Pump Driving circuit Object Function Test points Result Each circuits of loads in wiring diagram are all same Two pump mot orsare used to drain the tub Drain Pump Drain Pump Test Points Result 1 to 2 10 20 Ω T P 1 2 1 2 37 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 38: ...8 5 INLET VALVE ASSEMBLY 6 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 39: ..._T UG olytpz vyGhzzltis Circuit in the MAIN PCB Wiring Diagram Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes 39 ...

Page 40: ...esult tolerance 5 39 5 k 26 1 k 12 1 k 8 5 k 3 8 k 2 8 k Remarks At 86 F 30 C At 104 F 40 C At 140 F 60 C At 158 F 70 C At 203 F 95 C At 221 F 105 C Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes 40 ...

Page 41: ... 2 screws 5 Remove one screw 6 Lift the side the control panel assembly and pull it out 7 Unscrew the 8 screws from the control panel assembly 8 Disassemble the display PWB assembly 9 Disconnect the NFC connector 10 Disassemble the NFC PCB from the PCB assembly display TOP PLATE ASSEMBLY CONTROL PANEL ASSEMBLY DRAWER CONTROL PANEL ASSEMBLY DISPLAY PWB ASSEMBLY 9 DISASSEMBLY INSTRUCTIONS Copyright ...

Page 42: ...d the pressure switch assembly Remove the protective cover Unscrew 1 screw on the back Remove the main PWB Disconnect the connectors PROTECT COVER 1 2 3 4 5 75 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 43: ...er Unscrew a screw from the top bracket Unscrew the clamp nut at the lower part of the dispenser Unscrew 2 screws from the back of the cabinet Disassemble the 4 connectors from the valves Wire Color Blue Housing YL BK White Housing WH BK Blue Housing GY BK Red Housing BL BK 1 2 3 4 DRAWER 1 3 2 4 5 6 1 2 76 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purpos...

Page 44: ...from the filter cover Put a flat screwdriver or putty knife into the hinge slots at the bottom of the cover and pry it out Unscrew the screw from the lower side of the cabinet cover 1 2 3 4 77 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 45: ...witch connector Disassemble the clamp assembly Disassemble the gasket Lift and separate the cabinet cover NOTE When assembling the cabinet cover connect the door switch connector 5 6 7 8 9 10 11 78 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 46: ... gasket using the special gasket pliers Unscrew the 2 screws Disassemble the door upward NOTE Reconnect the connector after replacing the door switch assembly 1 3 1 2 2 DOOR DOOR LOCK SWITCH ASSEMBLY 79 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 47: ...w tw k G G G U z G G G SG G SG G G G G G U k G G G U jpyj sh pvu ovzl w twGovzl ilssv z X Y Z Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 48: ...oreign objects wire coin etc by inserting a long bar in the opening LAMP ASSEMBLY Unscrew 2 screws on the back of the top plate Pull the top plate backward and upward as shown TOP PLATE ASSEMBLY 1 2 3 1 Disconnect the connector 3 2 7 Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 49: ... G G G SG G G G T UG i y khtwly opunlS khtwly k G G G U y G G U w G G G U X Y Z G GYG G G G G U y G G G G G G U G GXG G G G U X Y Z k G G G G G G G U X Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes 49 ...

Page 50: ...M410 F110 A104 A105 A106 A102 A103 A101 A100 A430 A440 A220 A200 A303 A310 A300 A133 A140 A130 A151 A153 A390 A131 A141 A152 A156 A410 A455 A485 A150 A154 A450 F210 F215 A110 A111 A175 A176 ...

Page 51: ... K123 K610 K360 K611 K200 K411 K410 K110 K111 K140 K142 K320 K510 K135 K530 K131 K344 K340 K346 K349 K342 K348 K347 F145 F468 K130 K520 K540 K550 K105 F468 F464 K190 K516 F464 F463 F310 K141 F315 F140 K570 ...

Page 52: ...F160 F300 F323 F322 F462 F321 F227 F226 F220 F225 F430 F120 F130 F432 F170 ...

Page 53: ...11 Wiring Diagram Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes 53 결선도수정 필요 ...

Page 54: ...P No MFL68588909 ...

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