LG WM1377HW Series Service Manual Download

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WASHING MACHINE

SERVICE MANUAL

READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLES

CORRECTLY BEFORE OFFERING SERVICE.

MODEL : WM1377HW

CAUTION

Summary of Contents for WM1377HW Series

Page 1: ...WASHING MACHINE SERVICE MANUAL READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLES CORRECTLY BEFORE OFFERING SERVICE MODEL WM1377HW CAUTION ...

Page 2: ...P No MFL62645352 ...

Page 3: ...EQUENCY 14 7 4 HOW TO KNOW TO TEMPERATURE OF EACH THERMISTOR AT OPERATING CONDITION 14 7 5 ERROR DISPLAY 15 8 ERROR DIAGNOSIS AND CHECK LIST 17 8 1 DIAGNOSIS AND ANSWER FOR ABNORMAL OPERATION 17 8 2 FAULT DIAGNOSIS AND TROUBLE SHOOTING 20 9 DISASSEMBLY INSTRUCTIONS 26 10 EXPLODED VIEW AND PARTS LIST 34 10 1 THE EXPLODED VIEW OF CABINET ASSEMBLY 34 10 2 THE EXPLODED VIEW OF CONTROL PANEL AND DISPEN...

Page 4: ... mm D x850 mm H WASH PROGRAM Sanitary Bulky Large Cotton Normal Perm Press Baby Wear Delicates Hand Wash Wool Speed wash Drain spin RINSE Rinse Spin Extra Rinse WATER LEVEL 0 255 by sensor DOOR SWITCH TYPE Bi Metal type WATER LEVEL RESERVATION From 1 hours to 19 hours SENSING OF THE LAUNDRY AMOUNT Adapted FUZZY LOGIC Adapted DISPLAY OF THE REMAINING TIME Adapted ERROR DIAGNOSIS 10 items POWER AUTO...

Page 5: ... Heater Internal heater automatically heats the water to the best temperature on selected cycles Child Lock The Child lock prevents children 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 energ...

Page 6: ...r 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 2 4 THE DOOR CAN NOT BE OPENED While program is operating While Door Lock light turns on FUZZY LOGIC laundry amount selected washing temperature water temperature washing time rinsing time spin rhythm time ...

Page 7: ...is damaged it must be replaced by the manufacturer or its service agents or a similarly qualified person in order to avoid a hazard Drum Door Drain plug Adjustable feet Included Accessories Hot and Cold Water Hoses Wrench for removing shipping bolts and adjusting leveling feet Tie Strap for securing drain hose Elbow Bracket for securing drain hose Non skid pads or 6 ...

Page 8: ...STANDARD INSTALLATION The appliance should be installed as follows REMOVE THE TRANSIT BOLTS INSTALL THE APPLIANCE ON FLAT AND FIRM SURFACE ADJUST THE HORIZONTAL Remove the transit bolts Turn the leveling feet to 4EA y l l a t n o z i r o h e c n a i l p p a e h t t e s r e n n a p s d e i l p p u s h t i w Keep the transit bolts and spanner for future use Insert the provided 4 caps into the hole T...

Page 9: ...e firmly to prevent leak CONNECT DRAIN HOSE CONNECT POWER PLUG Make sure that the hose is not twisted The drain hose should be placed under 100cm from the floor Connect the power plug to the wall outlet Avoid connecting several electric devices It may be the cause of a fire Avoid submerging the end of the hose 8 ...

Page 10: ...wer off and then power on Check if the door can be opened after 3 minutes Turn off Wash and Rinse after pressing the Start Pause button and start the machine again Check drain and spin Press the Rinse Medic Rinse button simultaneously and the present temperature will be displayed If SVC is needed during check remove the remaining water by pulling out the hose cap Check the water heating Check auto...

Page 11: ...e washer Power Use this button to turn the power On Off Additional Programs Time Delay Allows the start of any cycle to be delayed for 1 19 hours Favorite Favorite program allows you to store a customized operation for next use Water Plus Select this option to add extra water to the wash and rinse cycles for superior results especially with large or bulky items Beep on off 10 ...

Page 12: ...ional cycle options and will light when selected Certain buttons also allows you to activate special function by processing and holding the button for 3 seconds Cycle setting buttons Use these buttons to select the desired cycle options for the selected cycle Press the button for that setting until the indicator light for the desired value is it Spin Selector knob To change the spin speed turn the...

Page 13: ...Drain Pump 152 170Ω Common Pressure S W PressureSwitch MeasureHzimpossible Here JustCheckcut off Circulation Pump Circulation Pump 152 170Ω Hall Sensor Control Common Ha 5 15kohm Ha 5 15kohm Inlet Valve Control Main Valve 3 5 4 5kΩ Pre Valve 3 5 4 5kΩ Motor Stator Control V U U W W V R 8 11Ω W U V 12 ...

Page 14: ...80 60 180 120 180 60 180 120 180 60 480 120 30 90 8 8 26 8 8 12 12 1 120 2 8 15 Approx Working Time Minute E N D A U T O O F F 1 02 1 47 1 02 57 58 2 03 47 15 1 47 Rinse Spin Drain Spin D T Extra Stain 4 6 W S Rinse 3 W S Rinse 2 W S Rinse Wash 1 W S Rinse Wash Pre Main W S Wash W S Rinse Spin Cotton Sanitary Bulky Large Hand Wash Wool Perm Press Speed Wash Baby Wear Drain Spin Delicate 42 4 2 8 2...

Page 15: ...y 241 10 kHz 1 24 1 kHz The digits means water level frequency 10 1 kHz s u t a t S y a l p s i D t n i o P k c e h C None Turns on all lamps and locks the door 1 time Tumble clockwise rpm 42 50 5 6 5 5 m p r n i p S d e e p s w o L s e m i t 2 137 m p r n i p S d e e p s h g i H s e m i t 3 4 times Inlet valve for prewash turns on Water level frequency 229 255 5 times Inlet valve for main wash tu...

Page 16: ... 0 2khz within 4 minutes not reached to water level 24 8 khz within 10 minutes or not reachd to the preset water level within 25 minutes Not fully drained within 10 minutes Water is over flowing less 213 If is displayed drain pump operates to drain water automatically The sensor pressure switch is out of order In case of operating the reservation function or the other function with door opened Clo...

Page 17: ...LEAD WIRE ASSEMBLY is not connected to the connnector of STATOR ASSEMBLY Reconnect or repair the connector The hall sensor is out of order defective Replace the STATOR ASSEMBLY Water leaks The washer ecperienced a power failure LOCKED MOTOR ERROR POWER FAILURE 16 ...

Page 18: ...s the power plug connected firmly to 120V outlet Power failure or Breaker opened Visit to check 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 check Clean the filter of inlet valve Symptom Guide for Service Call 17 ...

Page 19: ...L NO YES NO YES Started with door opened NO YES Is the debris filter clogged with foreign material such as pin coin and etc Is the drain hose frozen with water kinked or crushed Visit to check Restart the cycle Close the door Visit to check Check if the door switch is O K Is displayed Clean up the filter 18 ...

Page 20: ...he using amount of detergent Is softener put in the correct compartment of the drawer Is the drawer closed during wash Is the softener cap clogged Explain how to use softener Clean the compartment for softener Visit to check LOW SUDSING This appliance has the automatic suds sensing function which operates under much suds condition for good rinse and preventing overflow When much suds are sensed su...

Page 21: ...ring diagram 3 If you replace the PWB ASSEMBLY Put in the connectors correctly Check the fuse Replace MAIN PWB ASSEMBLY Reconnect the Noise Filter ASSEMBLY Reconnect the PWB ASSEMBLY When measuring the voltage of the outlet is the voltage AC 120V Is the led 1 on Is connector 2 disconnected or disassembled Is wire of the PWB ASSEMBLY disconnected Replace PWB ASSEMBLY NO POWER CAUTION 20 ...

Page 22: ... 2 QC TEST MODE Is water supplied Are replaceptacles correctly connected to the terminals of the INLET VALVE ASSEMBLY Is detergent put in the correct compartment of the drawer Is the detergent hardened Open the tap Check the AIR CHAMBER and the tube clogged with impurity Clean the filter Replace the INLET VALVE ASSEMBLY Replace the MAIN PWB ASSEMBLY Refer to NO WATER SUPPLY Check the wiring on the...

Page 23: ... the wiring on the dispenser Put it in the correct compartment Clean the cap and drawer Is the motor bolt loosened Is there friction noise from the motor Is water supplied Are receptacles correctly connected to the terminals of the INLET VALVE ASSEMBLY Is softener put in the correct compartment of the drawer Is the softener cap clogged 22 ...

Page 24: ... the water level frequency between 230 255 Checking voltage between two pins Connector RD YL as press the POWER button is the voltage 113 127 V 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 cut off resistance of coil is 80 150 Ω When checking voltage between connectors on spinning is the voltag...

Page 25: ...efer to the 7 2 QC Test Mode BLUE Option Left and Temp temperature button simultaneously HEATING CONTINUOUSLY ABOVE THE SETTINGWATER TEMPER WASH HEATER TROUBLE ATURE AC 120 V PCB 113 127 V MAIN PCB ASSEMBLY 24 ...

Page 26: ...on Right and Wash Temp POWER buttons at the same time after power off press the Start Pause button 1 times is the drum low speed spin Is it disconnected or disassembled Red 3pin 1 GY 4pin 2 Check the motor connector is the resistance of the terminal same as the figure MOTOR TERMINAL 1 Resistance of terminal About 5Ω 15Ω Replace the MAIN PWB ASSEMBLY Does the spring of Latch Hook actuate Is there c...

Page 27: ...led Pull out the drawer and unscrew 2 screws Lift the side the Control Panel Assembly and pull it out Two screws is unscrewed Push out PANEL ASSEMBLY CONTROL after Push the hook below The PWB assembly Display is disconnected When 7 screws are unscrewed on the PWB insulator and the PWB assembly Display is disassembled from the PWB insulator CONTROL PANEL PLATE ASSEMBLY TOP PWB ASSEMBLY DISPLAY DRAW...

Page 28: ...of PWB assembly Main is removed Disconnect connector from the wiring The plate assembly Top are disassembled Pull the drawer to arrow direction Two screws are unscrewed The hose clamps and the hose are disassembled The ventilation bellows are disassembled on the tub PWB ASSEMBLY MAIN DISPENSER ASSEMBLY Dispenser assembly Option 27 ...

Page 29: ...K BLACK VALVE NORMAL WASH GRAY BLACK VALVE HOT BLACK WHITE Open the door completely 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 Pull it out from hose First prepare a bucket to put in the remained water DOOR CAP REMAINING HOSE Removing method of remained water 28 ...

Page 30: ...sket is released Two screws are unscrewed Unscrew all the screws on the upper and lower sides of the CABINET COVER The plate assembly Top is disassembled Pull out the drawer and unscrew 2 screws Lift the side the Control Panel Assembly and pull it out Two screws is unscrewed Push out PANEL ASSEMBLY CONTROL after Push the hook below 29 ...

Page 31: ...net cover clamp is removed and the gasket is released Two screws are unscrewed The Door Lock S W is disconnected form the wiring connector and the strap SWITCH ASSY DOOR LOCK NOTE When assembling the CABINET COVER connect the Door S W connector 30 ...

Page 32: ...connectors Remove the hinges Damper at the Tub The Hinge Damper at the base is pulled off pressing on the snaps at the sharp end The hinge at the base is pulled off To arrow direction ROTOR ASSEMBLY STATOR ASSEMBLY FRICTION DAMPER Rotor Bolt Friction Damper Hinge Damper R OT OR ASSEMB LY S TA TOR ASSEMB LY FRICTION DAMPER 31 ...

Page 33: ...wed from the cabinet Remove the pump to arrow direction Loosen the nut Remove washing heater by pulling out When assembling the washing heater insert the heater to heater clip on the bottom of tub and check the position of wire color CAUTION Washing Heater Wire Color Red Wire Color Yellow Nut Ring Terminal PUMP HEATER 32 ...

Page 34: ... Remove washing heater Remove the foreign object wire coin etc by inserting long bar in the hole WHEN FOREIGN OBJECT STUCK BETWEEN DRUM AND TUB 33 ...

Page 35: ... OF CABINET ASSEMB LY 10 EXPLODED VIEW ANDPART LIST A102 A104 A106 A101 A110 A100 A430 A410 A450 A455 A200 A201 A220 A485 A133 A276 A275 A440 A134 A135 A310 A300 A130 A131 A141 A103 A303 A150 A140 A154 A153 A152 A151 34 ...

Page 36: ...10 2 THE EXPLODED VIEW OF CONTROL PANEL DISPENSERASSEMBLY F160 F220 F225 F300 F321 F462 F430 F441 F432 F324 F170 F210 F110 F216 F215 35 ...

Page 37: ...LY F464 K351 K350 K360 K143 K123 K361 K122 K121 K125 K320 K105 K610 K115 K135 K130 K611 K550 F468 K512 K131 K530 F461 K520 K540 F467 K410 K340 K345 K560 K510 K140 K410 K411 F140 F310 F320 F466 K141 K110 K111 K344 F145 K346 K342 K570 K571 K572 ...

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