LG WM1377HW Service Manual and Repair Guide

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

P/No.: MFL62645352

CONTENTS 1. SPECIFICATION............................................................................................................................3 2. FEATURES & TECHNICAL EXPLANATION ................................................................................ 4 3. PARTS IDENTIFICATION ............................................................................................................ 6 4. INSTALLATION ............................................................................................................................. 7 5. OPERATION ................................................................................................................................10 6. WIRING DIAGRAM / PCB LAYOUT / PROGRAM CHART .........................................................12 7. TROUBLE SHOOTING ................................................................................................................14 7-1.BEFORE SVC CHECKING ..................................................................................................14 7-2.QC TEST MODE ..................................................................................................................14 7-3.HOW TO KNOW THE WATER LEVEL FREQUENCY.........................................................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 DISPENSER ASSEMBLY ............35 10-3. THE EXPLODED VIEW OF DRUM AND TUB ASSEMBLY .............................................36 2

1. SPECIFICATION ITEM POWER SUPPLY 120 V~, 60 Hz PRODUCT WEIGHT 67 kg WASHING 134 W SPIN 455 W DRAIN MOTOR 80 W WASH HEATER 1000 W WASH 50 rpm SPIN No Spin/400/600/800/1000/1200/1400 OPERATION WATER PRESSURE 1.0 - 9.8 kgf/cm2 (100 - 980 kPa) CONTROL TYPE Electronic WASH CAPACITY Refer to the Rating Label DIMENSION 600 mm(W)x640 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 OFF Adapted CHILD LOCK Adapted AUTO RESTART Adapted TIME SAVE Adapted ELECTRICITY CONSUMPTION REVOLUTION SPEED WM1377HW 3

2. FEATURES & TECHNICAL EXPLANATION 2-1.FEATURES Direct Drive System The advanced Brushless DC motor directly drives the drum without belt and pulley. Water Circulation Spray detergent solution and water over the load over continu. Clothes are soaked more quickly and thoroughly during wash cycle. The detergent suds can be removed more easily by the water shower during rinse cycle. The water circulation system uses both water and detergent more efficiently. Built-in 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 energy and water consumption. Low noise speed control system By sensing the amount of load and balance, it evenly distributes load to minimize the spinning noise level. Automatic Wash Load Detection Automatically detects the load and optimizes the washing time. 추가선택, 예약, 4

2-2.DETERMINE WASHING TIME BY FUZZY LOGIC To get the best washing performance optimal time is determined by sensing of water temperature, selected washing temperature and laundry amount. 2-3.WATER LEVEL CONTROL ● This model adopts a pressure sensor which can sense the water 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 the best washing performance SENSING PROCESSING DETERMINATION EFFECT 5

3. PARTS IDENTIFICATION (For detergent and fabric softener) Drawer Drain hose Transit bolts Power plug Control panel Drain pump filter Lower cover cap • If the supply cord 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

Before servicing ask the customer what the trouble is. Check the adjustment(power supply is 120 V, remove the transit bolts.... ) Check the troubles referring to the trouble shooting. Decide service steps referring to disassembly instructions. And then, service and repair. After servicing, operate the appliance to see whether it works O · Kor NOT. ■ 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: ① . 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 The appliance goes up by rotating the feet clockwise. The appliance come down by rotating the feet counter clockwise. 4. INSTALLATION 1 2 7

■ HOW TO CONNECT INLET HOSE Check that the rubber packing is inside of the valve connector. Connect the inlet hose 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

TEST OPERATION Connect the power plug to the outlet. In case of Coloreds program. Connect the inlet hose. Preparation Press the POWER button. Press the Start/Pause . n o t t u b r o f washing. · Check if the drum rotates · Check if water is supplied clockwise and counterclockwise. through the detergent dispenser. · Power 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 automatic reverse Check the water supply. turn. Check drain and spin Power off and open the Water removal door 9

LG WM1377HW Service Manual and Repair Guide

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