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LG WM3360H*CA, Service Manual

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LG WM3360H*CA Service Manual Download Page 48

47

9-8. STEAM GENERATOR ASSEMBLY

Wiring
diagram

Steam generator Water level sensor
circuit in the MAIN PWB / wiring diagram

Heater & Thermistor : Refer to the 9-6 / 9-7

MAIN PWB

MICOM

PHOTO
COUPLER

IC 2

5V

IC 1

YL2

PK

VT

NA

NA

GND  L   S

  AG

  SENSOR

DC5V

Input A
(long)

Input B
(short)

12

3

4

12

3

4

1

2

3

1

2

3

Original

Test
points

1. Steam generator

1) Construction of steam generator

Inlet valve that controls supplying water, Water level sensor that sense amount
of water supply, thermistor ASSEMBLY the sense inner temperature of steam
generator, heater assembly that heats water supply, steam generator CASE
that is container of water supply, nozzle, hose of water supply.

WATER LEVEL SENSOR

THERMISTOR
ASSEMBLY

HEATER
ASSEMBLY

Summary of Contents for WM3360H*CA

Page 1: ...WASHING MACHINE SERVICE MANUAL CAUTION READ THIS MANUAL CAREFULLY TO DIAGNOSE PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT MODEL WM3360H CA Website http biz lgservice com ...

Page 2: ...OCT 2009 PRINTED IN KOREA P No MFL30599175 ...

Page 3: ...Troubleshooting 21 35 8 1 Safety Caution 21 8 2 Error Mode Summary 21 22 8 3 Troubleshooting Summary 23 8 4 Troubleshooting With Error 24 30 8 5 Troubleshooting Else 31 35 9 Component Testing Information 36 48 9 1 Filter Assembly Line Filter 36 9 2 Door Look Switch Assembly 37 38 9 3 Stator Assembly 39 41 9 4 Pump Motor Assembly 42 9 5 Inlet Valve Assembly 43 9 6 Heater Assembly 44 9 7 Thermistor ...

Page 4: ...IONS ELECTRIC POWER CONSUMPTION REVOLUTION SPEED WASHING DRAIN MOTOR WASH HEATER WASH SPIN Cycle 12 5 5 STEAM COLD WASH DELAY WASH PREWASH FRESH CARE EXTRA RINSE STAIN CARE Incorporated 14 5 116 psi 100 800 kPa Electronic 3 89 4 5 IEC 27 W X 293 4 D X 3811 16 H 51 D door open up to 19 hours PTC Solenoid 10 steps by sensor Incorporated Incorporated Incorporated Incorporated Incorporated 280 W 80 W ...

Page 5: ...a Large Door Opening Tilted drum and extra large opening make it possible to load and unload clothing more easily Steam Washing and SteamFresh TM Steam washing features upgraded washing performance with low energy and water consumption SteamFreshTM cycle removes wrinkles from dry clothes Automatic Wash Load Detection Automatically detects the load and optimizes the washing time Built in Heater Int...

Page 6: ...m then proceeds Spinning does not proceed until the 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 L...

Page 7: ...ton for 3 seconds to lock unlock control When child lock is set CHILD LOCK lights and all buttons are disabled except the POWER button You can lock the controls of the washer while washing CHILD LOCK lasts after the end of cycle If you want to deactivate this function Press and hold the STAIN CARE button for 3 seconds 2 8 WATER CIRCULATION When washing and rinsing function of shower at the upper p...

Page 8: ...ater Circulation Steam Nozzle Drum Light Drum Door Seal Cold Water Inlet Drain Pump Filter Drain Plug 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 Hoses 1 Hot and 1 Cold Door Dispenser Hot Water Inlet Air Vent for Safety Back of Washer ...

Page 9: ... After servicing operate the appliance to see whether it functions correctly STANDARD INSTALLATION The appliance should be installed as follows Remove the 4 shipping bolts with the supplied wrench Remove the lower boits 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 le...

Page 10: ...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 CONNECT POWER PLUG The end of the drain hose should be placed less than 96 from the floor Avoid submerging the end of the hose Connect the power plug to the wall outlet Avoid connecting several electric devices as doing so may cause a fire Hot Cold ...

Page 11: ...Check if the drum rotates clockwise and counterclockwise 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...

Page 12: ...11 WM3360H CA 5 OPERATION 5 1 CONTROL PANEL FEATURES ...

Page 13: ...f Status Indicator It shows elapsed time of the cycle the washer is operating Cycle Selector Knob Rotate the Cycle selector knob to select the cycle designed for different types of fabric and soil levels Start Pause Use this button to Start Stop the washer ...

Page 14: ...s option for heavily stained clothes such as play clothes or work clothes 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 FRESH CARE Use this function when you are not able to unload your clothes son after the wash cycle ends Wash Rinse Spin speed Soil Level Signal Button Select a water temperature based on...

Page 15: ...e cycle guide below shows the options and recommended fabric types for each cycle NOTE To protect your garments not every wash rinse temperature spin speed soil level or option is available with every cycle Available option ...

Page 16: ...e disabled except the ON OFF button NOTE CHILD LOCK lasts after the end of cycle If you want to deactivate this function Press and hold the STAIN CARE button for 3 seconds TUB CLEAN A buildup of detergent residue can occur in the wash tub over time and can lead to a mildewy or musty smell The TUB CLEAN cycle is specially designed to remove this buildup After the cycle has ended safely and convenie...

Page 17: ...only the drum rotates If water temperature 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 ...

Page 18: ...supply Water supply for rinse process E Rinse Rinsing process F 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 G Disentangling The same as item 9 H Intermittent spin The same as item A I Main spin1 The same as item B J Main spin2 At the end of a main spin the ...

Page 19: ...18 6 WIRING DIAGRAM PROGRAM CHART ...

Page 20: ... Steam Refresh 420 600 120 420 420 120 60 420 360 720 4 120 120 59 65 23 20 117 69 110 66 54 56 25 84 76 89 19 Allergiene Perm Press 70 12 15 25 2 60 60 60 60 18 14 20 Bright Whites 15 21 Heavy Duty 40 55 15 15 15 10 17 17 17 ...

Page 21: ...n repeatedly to cycle through the test modes None 1 time 2 times 3 times 4 times 5 times 6 times 7 times 8 times 9 times 10 times 11 times 12 times 13 times 14 times 15 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...

Page 22: ...use Electro Static Discharge plastic pack when delivering or keeping it ERROR SYMPTOM CAUSE WATER INLET ERROR Correct water level 24 6kHz is not reached within 8 minutes after water is supplied or it does not reach the preset water level within 20 minutes 1 UNBALANCE ERROR The load is too small The appliance is tilted Laundry is gathered to one side Non distributable things are put into the drum 2...

Page 23: ...e MOTOR HARNESS and 4 pin female white connector in the MAIN PWB ASSEMBLY is bad or unstable The MOTOR HARNESS between the STATOR ASSEMBLY and MAIN PWB ASSEMBLY is cut open circuited The hall sensor is out of order defective 8 EEPROM is out of order Displayed only when the START PAUSE button is first pressed in the Load Test Mode 9 POWER FAILURE After the power supply is stopped while washing mach...

Page 24: ... to 3 3 to 1 Result Test Points 8 12 k Ω 8 12 kΩ 10 15 Vdc 10 Vdc 10 Vdc Remarks Voltage Input Pulsing Signal Pulsing Signal 1 to 2 1 to 3 1 to 4 2 to 4 3 to 4 Result Test Points 700 1500 Ω 60 90 Ω Infinity 120 Vac Remarks At 77 25 At 77 25 Voltage Input 2 to 4 3 to 4 4 to 5 2 to 4 Pump Drain pump 10 20 Ω Circulation pump 18 30 Ω Result Test Points 0 Ω 0 Ω WH 1 to RD 3 WH 3 to RD 1 Heater 12 18 Pi...

Page 25: ... valve connector 120 V AC Check the all terminal of INLET VALVE ASSEMBLY while the power is on Replace the INLET VALVE ASSEMBLY No Yes Is the connector connected to MAIN PWB assembly disconnected or dis assembled NA2 NA4 BL3 Reconnect or repair the connector No Yes Yes Is Electrical connection correct Refer to 9 5 wiring diagram Replace the MAIN HARNESS No No After checking connector is the water ...

Page 26: ...2 pin1 BL3 pin1 After remove Terminal Position Assurance TPA of connector check as follows Pump running 120V 5 Stopped Motor Pump 0 1V Method 1 Press the Power button while the SPIN SPEED button and SOIL LEVEL button is pressed simultaneously 2 Press Start Pause button 1 time Pump slow speed running 2 times Pump mid speed running 3 times Pump high speed running 4 times Stop the Motor Pump Note Env...

Page 27: ...ace the THERMISTOR ASSEMBLY Yes No Check the trans of water infiltration into thermistor terminal Does the water infiltrate thermistor terminal Note Chances that the cause occurs from the main controller are very little Sensing part of the circuit tE consists of only resistors and capacitors Replace the THERMISTOR ASSEMBLY Yes Steam generator heater Wash heater Is the connector connected to thermi...

Page 28: ...net cracked Hall sensor Motor Drive Hall Sensor 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 Ω 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 Hall sensor Is hall sensor out of order Refer to 9 3 Stator assembly Hall sensor Yes No Replace the...

Page 29: ...t the cycle Replace the PCB ASSEMBLY No Is DOOR SWITCH ASSEMBLY broken 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 ...

Page 30: ...ry evenly In the DRUM assembly Yes Is the washing machine installed at an angle Adjust the height of washing machine to be kept horizontally Yes No Is displayed Yes When you press both WASH RINSE button and DELAY WASH button simultaneously is the water level frequency over 21 3kHz Check the AIR CHAMBER and the tube clogged No Does the inlet valve work when the power is not applied Replace the INLE...

Page 31: ... Reconnect or repair the connector No No Yes Is the resistance of the pressure sensor out of range pin 1 pin 3 21 23 Ω 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 ...

Page 32: ...e circuit breaker Yes No Is the current rating of 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 DISPLA...

Page 33: ...WB Display PWB disconnected or disassembled Reconnect or Repair the connector Yes Is the display PCB broken check the buzzer sound and LED light while push the button Replace the DISPLAY PWB ASSEMBLY Yes Is the button of panel stuck Repair the button Yes No No ...

Page 34: ...nd start QC test mode and run in high spin Refer to section 7 2 When the machine is spinning in high speed verify that it is stable If you do not have the unbalance part put 4 5 to 6 5 lbs 2 to 3 kg of clothing Once loaded press power Rinse Spin and the start pause button in sequence When the machine is spinning in high speed verify that it is stable If it is not stable adjust feet accordingly Aft...

Page 35: ...id fabric Softener Compartment 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 Prewash Hot water Main wash Steam Bleach 1 4 3 2 ...

Page 36: ...ch put in the correct compartment 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 Comp...

Page 37: ...he Component be sure to turn the power off and do voltage discharge sufficiently WARNING Wiring diagram Circuit in the MAIN PWB Wiring Diagram Vac MAIN PWB ASSEMBLY FUSE RD1 WH1 LI L2 RI CI 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 Ω 0 Ω 3 1 WH1 3 1 RD1 ...

Page 38: ...ough terminal 3 4 PTC solenoid will make the door 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...

Page 39: ...38 Test points Result Test Points 2 to 4 3 to 4 4 to 5 2 to 4 Result 700 1500 Ω 60 90 Ω Infinity 120 Vac Remarks At 77 F 25 C At 77 F 25 C Voltage Input 2 3 4 5 ...

Page 40: ...3 4 1 2 3 4 Hb Function Test points Windings Result Windings The Direct Drive 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 Unlike a more traditional brushless motor the rotor surrounds the stator rather than being attached to it Test Points Resul...

Page 41: ...o the Hall Sensor use the following steps 1 Unplug power cord 2 Remove rear washer panel 3 Locate Hall sensor connector on the stator behind the rotor 4 Place meter leads on terminals 5 to 4 white to gray 5 Plug in power cord close door and press power button DO NOT PRESS START 6 You should measure 10 to 15 VDC If 10 to 15 VDC is present control board white wire and gray wire are OK If not follow ...

Page 42: ... but does not pulse or change Hall sensor has failed and must be replaced IF zero 0 voltage is measured on either test check red blue wires for continuity Repair or replace harness as needed Voltage Testing Hall Sensor from the Main PCB Assembly 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 ...

Page 43: ... 4 1 2 3 4 BL3 SB SB SB BK BN BN DRAIN PUMP CIRCULATION PUMP BK Object Function Test points Result Each circuits of loads in wiring diagram are all same Two pump motors are used to drain the tub and to circulate the water detergent solution Drain Pump Drain Pump Circulation Pump Circulation Pump Test Points Result 1 to 2 10 20 Ω Test Points Result 1 to 2 18 30 Ω T P For Drain For Circulation 1 2 2...

Page 44: ...t or cold water valve solenoids to meet the selected water temperature After pull out the connector of defective valve check the resistance Test points 1 2 Result 0 8 1 2 kΩ Wiring Diagram MAIN WASH AG VALVE PRE WASH BLEACH HOT VALVE 1 2 1 2 1 2 1 2 1 2 RD BL BL RD NA WH NA4 VT GY YL BL NA2 BL3 4 3 2 1 1 2 3 1 2 3 4 3 2 1 4 3 2 1 4 3 2 1 COMMON BK MIAN PWB INLET VALVE Each circuits of loads in wir...

Page 45: ...YL F U S E F U S E Function Test points Result 1 The wash heater is designed to raise the wash water to the desired temperature selection during certain wash cycles 2 The steam generator heater is designed to make the water to the steam during steam cycles Wash Heater Steam Generator Heater Each circuits of loads in wiring diagram are all same Wash Heater Steam Generator Heater Test Points Result ...

Page 46: ...NA3 BL BN WH 1 2 1 2 1 2 1 2 WH WASH THERMISTOR STEAM GENERATOR THERMISTOR 1 2 3 4 5 6 1 5V 5V R R R R C C C C 2 3 4 5 6 Function Test points The thermistor temperature sensor is used to monitor water temperature in the tub or steam generator Wash Thermistor 2 1 Steam Generator Thermistor 1 2 1 2 ...

Page 47: ... C At 158 F 70 C At 203 F 95 C At 221 F 105 C Steam generator Thermistor Test Points 1 to 2 Result tolerance 5 39 5 kΩ 26 1 kΩ 12 1 kΩ 8 5 kΩ 3 8 kΩ 2 8 kΩ 2 1 kΩ 1 4 kΩ 1 0 kΩ 0 7 kΩ 0 4 kΩ 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 At 241 F 116 C At 266 F 130 C At 293 F 145 C At 320 F 160 C At 356 F 180 C ...

Page 48: ... Input B short 1 2 3 4 1 2 3 4 1 2 3 1 2 3 Original Test points 1 Steam generator 1 Construction of steam generator Inlet valve that controls supplying water Water level sensor that sense amount of water supply thermistor ASSEMBLY the sense inner temperature of steam generator heater assembly that heats water supply steam generator CASE that is container of water supply nozzle hose of water supply...

Page 49: ...arts like the water level sensor thermistor or heater cannot be replaced individually Diagnosis is limited to determining malfunction and replacing as an assembly The steam generator does not have to be removed from the machine to be drained Be sure to let the water cool to avoid a burn Have a hose available to slip onto the connector or a large towel to catch the water so it doesn t run down into...

Page 50: ...sconnect the Display PWB assembly connector from the cabling 4 Pull out the drawer and unscrew 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 TOP PLATE ASSEMBLY CONTROL PANEL ASSEMBLY DRAWER CONTROL PANEL ASSEMBLY DISPLAY PWB ASSEMBLY 10 DISASSEMBLY INSTRUCTIONS ...

Page 51: ...AIN PWB ASSEMBLY Disconnect the POWER connector and 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 ...

Page 52: ... or three connectors from the noise filter 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 Red Housing VT BK White Housing WH BK Blue Housing GY BK Red Housing BL BK 1 2 3 4 5 DRAWER 1 3 2 4 5 6 1 2 ...

Page 53: ...s from upper of the cabinet cover Unscrew the screw from 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 ...

Page 54: ...embly Tilt the cabinet cover Disconnect the door switch 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 ...

Page 55: ...rews from the hinge Use the 8mm tool DOOR LOCK SWITCH ASSEMBLY Open the door and disassemble the CLAMP ASSEMBLY Unscrew the 2 screws Disassemble the door upward NOTE Reconnect the connector after replacing the DOOR SWITCH ASSEMBLY 1 3 1 2 2 ...

Page 56: ...onnectors from the heater Loosen the nut and pull out the heater THERMISTOR Disassemble the cabinet cover Unplug the white connector from the thermistor Pull it out by holding the bracket of the thermistor CAUTION When assembling the heater insert the heater into the heater clip on the bottom of the tub Tighten the fastening nut so the heater is secure CIRCULATION HOSE PUMP HOSE BELLOWS 1 2 3 1 2 ...

Page 57: ...ver Separate the heater from the tub Remove any foreign 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 ...

Page 58: ...hem they can be re used Bolt Rotor DAMPER HINGE DAMPER Disassemble the back cover Remove the bolt Pull out the rotor 1 2 3 Unscrew the 2 screws from the tub bracket Remove the 6 bolts on the stator Unplug the 2 connectors from the stator 1 2 3 Disassemble the damper hinges from the tub and base 1 ...

Page 59: ...To check out the fault diagnosis of TSG you can pull out the plug and let the water drain away 1 Be cautious in case of the TSG is hot 2 Remove the housing attached to the TSG Heater Water level frequency sensor Thermistor 1 Remove the screw of the TSG and body frame 2 ...

Page 60: ...59 Body Frame Remove the screws from both ends of the frame rail 3 Separate the hoses from the TSG 4 Remove the body frame and then separate the TSG from the washer 5 ...

Page 61: ...A152 A130 A131 A390 A310 A300 A133 A303 A200 A140 A150 A110 F210 A104 A105 A106 F215 A141 A151 A153 Printed materials Description Owner s Manual Energy Label Loc No Tech Sheet Service Manual Quick Start Guides Installation Sheet G001 G002 G003 G004 G006 G007 The following parts are not illustrated Non Skid pads G010 M400 A410 A175 A156 ...

Page 62: ...K572 K570 K141 K611 K610 K142 In case of replacing THERMISTOR of HEATER ASSEMBLY K320 replace HEATER ASSEMBLY K320 HEATER ASSEMBLY K320 includes THERMISTOR In case of replacing BEARING BALL K121 K122 and GASKET K125 replace TUB ASSEMBLY OUTER K105 TUB ASSEMBLY OUTER K105 includes BEARING BALL K121 K122 and GASKET K125 Part Assembly K142 includes 10 screws K346 K348 K344 K347 K345 K349 K340 K342 K1...

Page 63: ...A276 67 11 3 DISPENSER ASSEMBLY F300 F327 F462 F225 F432 F130 F120 F441 F430 F160 F220 F227 F226 F323 F322 F321 F170 F180 Inlet Valve Filter SVC COLD BLUE HOT ORANGE A275 ...

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