LG WM4070HVA Service Manual and Repair Guide

WASHING MACHINE SERVICE MANUAL CAUTION READ THIS MANUAL CAREFULLY TO DIAGNOSE PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT. MODEL: WM4070H*A Website : http://biz.lgservice.com

MFL67307926 : . o N / P JULY 2012 PRINTED IN KOREA

4 CONTENTS 1. Specifications .................................................................................................................................. 3 2. Features and Technical Explanation ............................................................................................ 4-6 3. Parts Identification ........................................................................................................................... 7 4. Installation and Test ................................................................................................................... 8-10 5. Operation ................................................................................................................................. 11-17 5-1. Control Panel Features ..................................................................................................... 12-13 5-2. Cycle Guide ........................................................................................................................... 14 5-3. Special Functions ................................................................................................................... 15 5-4. Explanation of Each Process ............................................................................................ 16-17 6. Wiring Diagram / Program Chart .............................................................................................. 18-19 7. Test Mode ...................................................................................................................................... 20 7-1. Safety Caution ....................................................................................................................... 20 7-2. Load Test Mode ..................................................................................................................... 20 7-3. How To Read the Display in Load Test Mode ........................................................................ 20 8. 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 Assembly ........................................................................................................ 45-46 9-8. Steam Generator Assembly .............................................................................................. 47-48 10. Disassembly Instructions ......................................................................................................... 49-59 11. Exploded View ......................................................................................................................... 60-62 11-1. Cabinet and Control Panel Assembly ................................................................................... 60 11-2. Drum and Tub Assembly ...................................................................................................... 61 11-3. Dispenser Assembly ............................................................................................................. 62

WARNING: Wash hands after handling

6 2.FEATURES & TECHNICAL EXPLANATION 2-1. FEATURES Ultra Capacity The larger drum enables not just higher head drop and stronger centrifugal force, but also less tangling and wrinkling of the laundry. Heavier loads, such as king size comforters, blankets, and curtains, can be washed. Direct Drive System The advanced brushless DC motor directly drives the drum without belt and pulley. Tilted Drum and Extra Large Door Opening Tilted drum and extra large opening make it possible to load and unload clothing more easily. Steam Washing Steam washing features upgraded washing performance with low energy and water consumption. RollerJets Washing ball enhances the wash performance and reduces damage to the 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 washing time. Built-in Heater Internal heater helps to maintain water temperature at its optimum level for selected cycles. Child Lock The child lock prevents children from pressing any button to change the settings during operation.

7 2-2. NEURO FUZZY WASHING TIME OPTIMIZATION To get the best washing performance, optimal time is determined by the water temperature, the selected washing temperature, and the size of the load. 2-3. WATER LEVEL CONTROL This model incorporates a pressure sensor which can sense the water level in the tub. The water supply is stopped when the water level reaches the preset level, the washing program 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 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 locked/unlocked. 2-4. DOOR CONTROL

8 2-5. THE DOOR CAN NOT BE OPENED While program is operating. When a power failed and power plug is taken out in operation. While Door Lock lights turn on. White the motor is in the process of inertial rotating, through the operation is paused. 2-6. DOOR LOCKED LAMP LIGHTS When the frequency of water level is lower than 22.9 kHz. (It can be canceled when the frequency is more than 23.8 kHz.) When the temperature inside the tub is higher than 45°C and 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 STAIN CARE 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 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 part of Gasket. When washing, it continuously operates for 3 minutes and intermittently. When rinsing, it continuously operates after completion of water supply. 2-9. STEAM For tough stained clothes, sick room linens, or baby clothes. Steam Wash is available with Sanitary, Bulk/Large, Perm. Press, Cotton/Normal, and Baby Wear cycles. This option features upgraded washing performance with low energy and water consumption. Do not load delicates such as wool, silk, and easily discolored clothes.

9 3.PARTS IDENTIFICATION NOTE Contact LG Customer Service at 1-800-243-0000 (1-888-542-2623 in Canada) if any accessories are missing. For your safety and for extended product life, use only authorized components. The manufacturer is not responsible for product malfunction or accidents caused by the use of separately purchased unauthorized components or parts. The images in this guide may be different from the actual components and accessories, and are subject to change by the manufacturer without prior notice for product improvement purposes. Parts and Accessories Parts Accessories Water inlets Shipping bolts Power cord Drain hose NCLUDED Accessories OPIONAL Accessories Detergent dispenser drawer (See page 20) Door Magnet Door Plunger (see page 3) Control panel (See page 9) Door seal Water circulation and steam nozzles Tub Leveling feet Drain pump ﬁlter cover Drain pump ﬁlter Drain hose

10 1 2 3 4 5 6 7 Before servicing, ask the customer what the trouble is. When installing or repairing the washer, put on long gloves and safety glasses. Check the setup (power supply is 120 VAC, remove the transit bolts, level the washer, etc.) Check with the troubleshooting guide. Plan your service method by referring to the disassembly instructions. Service the unit. 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. આ 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 leveling feet to adjust the appliance. Lower Higher REMOVE THE SHIPPING BOLTS INSTALL THE APPLIANCE ON A FLAT AND FIRM SURFACE ADJUST THE LEVELING 4.INSTALLATION & TEST Keeping

11 Verify that the rubber washer is inside of the valve connector. Tighten the inlet hose securely to 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. CONNECT POWER PLUG આ 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

LG WM4070HVA Service Manual and Repair Guide

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