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This document describes the LG Washing Machine, models WD1412RTAB (1~9) and WD1412RTB (1~9), providing a comprehensive service manual with specifications, features, troubleshooting, part inspection, and disassembly instructions.
The LG Washing Machine is designed to perform various washing, rinsing, and spinning actions for laundry. It incorporates an Inverter Direct Drive system, which uses a brushless DC motor to directly drive the drum, eliminating the need for a belt and pulley. This system contributes to reduced noise and increased durability. The machine features "6 motion" technology, allowing for diverse drum actions or combinations thereof, tailored to specific wash programs. This, combined with controlled spin speeds and the drum's ability to rotate both left and right, enhances washing performance. A built-in heater automatically heats the water to optimal temperatures for selected cycles, improving cleaning efficiency. The Intelligent Wash System detects the load amount and water temperature to determine the most efficient water level and washing time, minimizing energy and water consumption. For safety, a Child Lock function prevents unintended changes to settings during operation. The low noise speed control system senses load amount and balance to evenly distribute the load, reducing spinning noise. The machine also includes a pressure sensor for water level control, stopping water supply once the preset level is reached and preventing spinning until the water in the tub reduces to a certain level. The door remains locked during operation and when the "Door Lock" light is on.
The washing machine offers a variety of wash programs including Cotton, Cotton Eco, Mix, Easy Care, Duvet, Baby Care, Skin Care, Sports Wear, Wool, Quick 30, Silent Wash, Rinse+Spin, Dry Only, and Wash+Dry. Rinse options include Normal, Rinse+, Rinse++, Rinse++Hold, and Normal+Hold. The cycle selector knob allows users to choose cycles based on fabric type and soil level. Additional programs include Time Delay (3-19 hours), Steam Wash, Favorite (for storing customized cycles), and Pre Wash (adds 19 minutes pre-wash and drain). Option buttons provide further customization: Rinse+ for additional rinsing, Time Save to reduce wash program duration, Intensive for heavily soiled laundry, Temp. to select water temperature, and Spin to change spin speed. Rinse Hold keeps clothes suspended in water after the last rinse without spinning. The display shows estimated time remaining and error indications (e.g., IE, dE, UE, tE, LE, AE, dHE, PF, PS). A Beep on/off function can be set by pressing and holding Temp. and Spin buttons. The Child Lock function disables all buttons except Power when activated. Dry programs (Lower Temp., Iron, Cupboard, Eco, Time) can be selected by rotating the dry button. A Tub Clean course is available to clean the inside of the washer.
The manual provides detailed troubleshooting steps for various errors, including Water Inlet Error (IE), Unbalanced Error (UE), Water Outlet Error (OE), Overflow Error (FE), Pressure Sensor S/W Error (PE), Door Open Error (dE), Thermistor (Heating) Error (tE), Motor Lock Error (LE), Water Leakage (AE), Dry Heater Error (dHE), and Power Failure/Supply issues (PF, PS). It also addresses common problems like vibration and noise during spin, detergent/softener not flowing, and water leaks. Part inspection procedures are outlined for the Filter Assembly (Line Filter), Door Lock Switch Assembly, Stator Assembly, Pump Motor Assembly, and Inlet Valve Assembly, including resistance checks for components like the Hall Sensor and thermistors. Disassembly instructions are provided for the Control Panel Assembly, PWB Assembly (Main), Dispenser Assembly, Inlet Valve, Door, Cabinet Cover, Switch Assy (Door Lock), Rotor Assembly, Stator Assembly, Friction Damper, Pump, and Heater, facilitating repair and replacement of parts. The manual emphasizes safety precautions, such as unplugging the power cord before servicing and using only LG-supplied service parts. It also advises applying insulation tape after servicing electrical wires to prevent shorts.
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