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LG WM3677HW, Service Manual, Page: 22 / 45

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LG WM3677HW Service Manual Download Page 22

2

1

NO

YES

YES

YES

YES

NO

NO

NO

NO

YES

Connector

Is the supplied voltage 120 V AC?

Is the voltage between the 2 FILTER ASSEMBLY
connectors 120 V AC?

Is the LED (1) on?

Are the connectors (2) on the PWB loose?

Is wire of the DISPLAY PWB ASSEMBLY  
broken?

Replace  DISPLAY PWB ASSEMBLY 
or repair wire.

Check the fuse or reset
the circuit breaker.

Replace the FILTER
ASSEMBLY (CIRC).

Replace MAIN PWB
ASSEMBLY.

Reconnect.

Replace the MAIN PWB
ASSEMBLY.

NO POWER

8-2. FAULT DIAGNOSIS AND TROUBLESHOOTING

1. Be careful of electric shock if disconnecting parts while troubleshooting.

2. First of all, check the connection of each electrical terminal with the wiring diagram.

3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.

CAUTION

Summary of Contents for WM3677HW

Page 1: ...ICE MANUAL READ THIS MANUAL CAREFULLY TO DIAGNOSE PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT MODEL WM3677HW WD 12270RD WD 13276RD WD 14276RD CAUTION Website http www LGEservice com E mail http www LGEservice com techsup html ...

Page 2: ...101 APR 2004 PRINTED IN KOREA P No 3828ER3027G ...

Page 3: ...ERFORMING SERVICE 15 7 2 QC TEST MODE 15 7 3 HOW TO CHECK THE WATER LEVEL FREQUENCY 15 7 4 ERROR DISPLAY 16 8 ERROR DIAGNOSIS AND CHECK LIST 18 8 1 DIAGNOSIS AND SOLUTION FOR ABNORMAL OPERATION 18 8 2 FAULT DIAGNOSIS AND TROUBLESHOOTING 21 9 DISASSEMBLY INSTRUCTIONS 32 10 EXPLODED VIEW 41 10 1 CABINET CONTROL PANEL ASSEMBLY 41 10 2 DRUM TUB ASSEMBLY 42 10 3 DISPENSER ASSEMBLY 43 10 4 DRYER 44 ...

Page 4: ...OM PROGRAM Incorporated WATER CIRCULATION Incorporated OPERATIONAL WATER PRESSURE 4 5 145 psi 30 1000 kPa CONTROL TYPE Electronic WASH CAPACITY 3 22 cu ft 3 72 cu ft IEC DRY CAPACITY Max 11 lbs 5 kg DIMENSIONS 27 W X293 4 D X3811 16 H 5013 16 D dooropen 686mm W x767mm D x982mm H 1291mm D D dooropen DELAY WASH up to 12 hours DOOR SWITCH TYPE PTC Solenoid WATER LEVEL 10 steps by sensor LAUNDRY LOAD ...

Page 5: ...minated more easily by the water shower during rinse cycle The water circulation system uses both water and detergent more efficiently RollerJets The washing ball enhances wash performance and reduces damage to clothing The jets spray and help tumble clothes to enhance washing performance while maintaining fabric care Automatic Wash Load Detection Automatically detects the load and optimizes the w...

Page 6: ...m then proceeds Spinning does not proceed until the water in the tub drains to a certain level 2 4 DOOR CONTROL 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 occurred while in operation the door will unlock after 5 minutes Clicking sounds can be heard when the door is lock...

Page 7: ... water level is not 25 5 kHz It can be canceled when the water level is 25 5 kHz or the temperature inside the tub is lower than 40 C 2 7 CHILD LOCK Use this option to prevent unwanted use of the washer Press and hold PRE WASH button 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 washer while it is...

Page 8: ...7 3 PARTS IDENTIFICATION ACCESSORIES 란제리 란제리 Water Circulation Nozzle ...

Page 9: ...to see whether it functions correctly STANDARD INSTALLATION The appliance should be installed as follows REMOVE THE SHIPPING INSTALL THE APPLIANCE ADJUST THE BOLTS ON A FLAT AND FIRM SURFACE LEVELING Remove the 4 shipping bolts Turn the leveling feet to adjust with the supplied wrench the appliance Do first lower side to remove easily Keep the shipping bolts and spanner for future use Insert the 4...

Page 10: ...rely to prevent leaks CONNECT THE DRAIN HOSE CONNECT POWER PLUG The end of the drain hose should be placed less than 96 from the floor Connect the power plug to the wall outlet Avoid connecting several electric devices as doing so may cause a fire Make sure that the hose is not twisted Avoid submerging the end of the hose ...

Page 11: ...d If SVC is needed during check remove the remaining water by pulling out the hose cap Preparation for Press the POWER button Press the Start Pause washing button Press the WASH RINSE button Check if the drum rotates Check if water is supplied and the present temperature will clockwise and counterclockwise through the detergent dispenser be displayed Check the water heating Check the automatic Che...

Page 12: ...5 WIRING DIAGRAM PROGRAM CHART 11 ...

Page 13: ...12 ...

Page 14: ...Select the desired Options 4 Press and hold the Custom Program button for 3 seconds 2 beep sounds The Custom Program is now stored for future use To reuse the program select Custom Program and press Start Pause Use this option to prev Press and hold PRE W lock unlock control When Child lock is set buttons are disabled e can lock the washer w Use this button to Start Stop the washer This display sh...

Page 15: ...nse Quick Cycle The Quick cycle offers a quick cycle time Lights whenever the door of the washer is locked The door can be unlocked by pressing the Start Pause button to stop the washer Dry program can be selected by pressing the DRY button By pressing the DRY button NORMAL MORE 30 60 90 120 LOW TEMP LESS can be selected Allows the start of any cycle to be delayed for 1 12 hours Select a water tem...

Page 16: ... water level frequency x 1 kHz Check Point Display Status None Turns on all lamps and locks the door 1 time Tumble clockwise rpm 40 50 2 times Low speed Spin rpm 3 times High speed Spin rpm 4 times Inlet valve for prewash turns on Water level frequency 25 65 5 times Inlet valve for main wash turns on Water level frequency 25 65 6 times Inlet valve for hot water turns on Water level frequency 25 65...

Page 17: ...ithin 8 minutes after water is supplied or it does not reach the preset water level within 25 minutes The load is too small The appliance is tilted Laundry is gathered to one side Non distributable things are put into the drum 1 2 IMBALANCE ERROR Not fully drained within 10 minutes 3 DRAIN ERROR Water is overflowing water level frequency is over 213 If is displayed the drain pump will operate to d...

Page 18: ... cut open circuited The hall sensor is out of order defective 8 9 LOCKED MOTOR ERROR Loose Ball Sensor Connector Ball Sensor is out of order Displayed only when the START PAUSE button is first pressed in the QC Test Mode 10 BALL SENSOR ERROR The washer experienced a power failure The Dry Heater is out of order Replace the Dry Heater The connector of the Dry Heater is not connected properly to the ...

Page 19: ... YES YES NO NO YES NO NO Is the power plug connected firmly to 120 V AC outlet Power failure or Breaker opened Is the outlet controlled by a switch Visit to service Is displayed Is the tap opened Is the tap frozen Is the water supply shut off Is filter in the inlet valve clogged with foreign material Visit to service Clean the filter of inlet valve ...

Page 20: ...19 SYMPTOM GUIDE FOR SERVICE CALL Door error Drain trouble Was the load too large Visit to service Visit to service ...

Page 21: ... amount of detergent Is liquid laundry product put in the correct compartment of the dispenser Is the cap clogged Explain proper use of liquid laundry products Clean the compartment Visit to service LOW SUDSING This appliance has an automatic suds sensing function which prevents overflow When excessive suds are sensed the suds removing implementations such as drain water input pause will operate w...

Page 22: ...B ASSEMBLY or repair wire Check the fuse or reset the circuit breaker Replace the FILTER ASSEMBLY CIRC Replace MAIN PWB ASSEMBLY Reconnect Replace the MAIN PWB ASSEMBLY NO POWER 8 2 FAULT DIAGNOSIS AND TROUBLESHOOTING 1 Be careful of electric shock if disconnecting parts while troubleshooting 2 First of all check the connection of each electrical terminal with the wiring diagram 3 If you replace t...

Page 23: ... that the washer is stable Put an unbalance part rubber inside of drum and 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 VIBRATION NOISE IN SPIN If it is not stable adjust feet accordingly After the washer is level tighten the lock nuts up against of the base of the washer All lock nuts must be tightened If you do n...

Page 24: ...ed 6 Press the Start Pause button 7 Press the Dry button repeatedly to set spin speed 600 900 1020 1120 rpm and check if there is vibration and noise 8 If there is no vibration and noise increase the spin speed by pressing Dry button 9 If there is vibration and noise rotate the Cycle selector knob clockwise to reduce the Spin Speed reduce by 50 and 100 rpm In case of 600 rpm it can not reduce the ...

Page 25: ...the inlet valve connector is 120 V AC Refer to 7 2 QC TEST MODE Is water supplied Are receptacles correctly connected to the terminals of the INLET VALVE ASSEMBLY Has detergent been put in the correct compartment of the dispenser Is the detergent caked or hardened Open the tap Check the AIR CHAMBER and the tube clogged Clean the filter Replace the INLET VALVE ASSEMBLY Check electrical connection R...

Page 26: ...r to NO WATER SUPPLY_ Check the wiring on the dispenser Put it in the correct compartment Clean the Cap and Container Is the motor bolt loosened Is there friction noise coming from the motor Is water supplied Are the plugs correctly connected to the terminals of the INLET VALVE ASSEMBLY Is liquid detergent softener bleach put in the correct compartment of the drawer Is the liquid detergent softene...

Page 27: ...ency 255 When pressing SPIN SPEED and SOIL LEVEL buttons at the same time while washing is the water level frequency between 230 243 Check the voltage between two pins while pressing the POWER button Is the voltage 120 V AC Is the drain hose twisted or frozen Is the impeller of the drain pump clogged Is the connector disconnected disassembled Is the coil of the drain pump too high or low resistanc...

Page 28: ...27 1 Extra Hot 70 C Push the THERMISTOR tightly to the rubber When checking the THERMISTOR on the tub is the THERMISTOR loose HEATING CONTINUOUSLY ABOVE THE SETTING WATER TEMPERATURE WASH HEATER TROUBLE ...

Page 29: ...or Hose clogged Is the connector disconnected disassembled Is the coil of the right side of drain pump open or short circuited Coil R is 18 30 Ω When checking voltage between the connectors during spin is the voltage 120 V AC as the figure Remove foreign material Remove foreign material Reconnect or repair the connector Replace PUMP MOTOR ASSEMBLY Replace the MAIN PWB ASSEMBLY ...

Page 30: ...inning at low speed Is it disconnected or disassembled Red 3pin 1 NA 4pin 2 Check the motor connector Is the resistance of the terminal the same as the figure MOTOR TERMINAL Resistance of terminal About 5 Ω 15 Ω Replace the MAIN PWB ASSEMBLY Does the spring of Latch Hook actuate Is there clicking sound once or twice when the START PAUSE button is pressed to start the cycle Is DOOR SWITCH ASSEMBLY ...

Page 31: ...AY CHECK FOR DRY HEATER TROUBLE CHECK FOR DRY FAN MOTOR TROUBLE NO YES Replace the thermistor 6322FR2046C Dry Duct YES NO Disassemble the dry fan assembly and dry duct upper and remove foreign objects in duct and fan Dry duct Condensing duct Condensing bellows Thermistor Is the resistance of thermistors on dry duct 2 5kΩ 180kΩ at 100 C 0 C ...

Page 32: ...31 ...

Page 33: ...sembling and repairing the parts Unscrew 2 screws on the back of the top plate Pull the top plate backward and upward as shown Disconnect the Display PWB Assembly connector from Trans cable Pull out the drawer and unscrew 2 screws Lift the left side of the Control Panel Assembly and pull it out Unscrew the 9 screws from the Control Panel Assembly Disassemble the Display PWB Assembly ...

Page 34: ... Disconnect the POWER connector and SENSOR SWITCH ASSEMBLY Remove the Protect Cover Disconnect the connectors Unscrew 1 screw on the back Disassemble the Main PWB CONNECTOR PROTECT COVER MAIN PWB ASSEMBLY ...

Page 35: ...er part of the dispenser Disassemble the 4 connectors from the valves Unscrew 2 screws from the back of the cabinet Unscrew a screw from the TOP BRACKET Disassemble two connectors from the POWER CORD Wire Color Blue Housing YL BK White Housing WH BK Blue Housing GY BK Red Housing BL BK White Housing OR BK 5 DISPENSER ASSEMBLY NOISE FILTER ...

Page 36: ...upper of the canbinet cover Unscrew the screw from filter cover Put a flat screwdriver or putty knife into the both sides of the filter cover and pull it out Unscrew the screw from the lower side of the cabinet cover CABINET COVER ...

Page 37: ... the clamp assembly Tilt the cabinet cover Disconnect the door switch connector NOTE When assembling the CABINET COVER connect the connector Lift and separate the cabinet cover Disassemble the clamp assembly Disassemble the Gasket ...

Page 38: ...hinge and pull out the hinge cover Unscrew a screw from the lower side of door Disassemble the door upward DOOR Open the door and disassemble the CLAMP ASSEMBLY Unscrew the 2 screws DOOR LOCK SWITCH ASSEMBLY Be careful The door is heavy NOTE Reconnect the connector after replacing the DOOR SWITCH ASSEMBLY ...

Page 39: ...ection Disassemble the cabinet cover Separate 2 connectors from the heater Loosen the nut and pull out the heater 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 ...

Page 40: ...ssemble the cabinet cover Separate the heater from the tub Remove any foreign objects wire coin etc by inserting a long bar in the opening Unscrew the 4 screws from the back cover Unscrew the single screw from the lower right side of the cabinet Disconnect the connector from PWB Harness ...

Page 41: ...t Pull out the Rotor Unscrew the 2 screws from the tub bracket Remove the 6 bolts on the stator Unplug the 2 connectors from the stator Disassemble the damper hinges from the tub and base Separate the dampers NOTE Once removed replace the damper with new one ...

Page 42: ...ONTROL PANEL ASSEMBLY 10 EXPLODED VIEW A140 A130 A152 A410 A455 A154 A150 A450 A110 A111 F210 F215 F110 A101 A100 A430 A440 A155 A105 A104 A102 A490 A103 A485 A151 A153 A131 A141 A133 A201 A220 A495 A303 A200 A300 A310 ...

Page 43: ...351 K350 K360 K115 K140 K111 K110 K420 K411 F140 K131 K512 K510 K560 F315 F465 K125 F466 F467 K550 K520 F461 K540 F463 K130 K530 F464 F310 K121 K122 K611 K141 K610 F145 F468 K105 K135 K511 K340 K344 K346 K342 K320 K571 K572 K570 K345 K124 ...

Page 44: ...43 10 3 DISPENSER ASSEMBLY HOT RED COLD BLUE F300 F227 F220 A275 A276 F226 F432 F130 F120 F441 F225 F430 F160 F170 F321 F322 F323 F462 ...

Page 45: ...44 10 4 DRYER M230 K311 M121 M120 K311 M310 M312 M311 M100 M210 M215 M240 M101 M220 M260 M235 M130 M110 M111 ...

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