LG WM2277HW Service Manual - Page 29

HEATING WITHOUT WATER When pressing SPIN SPEED and SOIL LEVEL at the same time after draining, is the water level frequency 255? When pressing SPIN SPEED and SOIL LEVEL buttons NO at the same time while washing, is the water level frequency between 230 - 243 ? YES Replace the SENSOR SWITCH ASSEMBLY. Check the voltage between two pins while pressing the POWER button. Is the voltage 120 V AC? YES Replace the MAIN PWB ASSEMBLY. DRAIN MALFUNCTION Is the drain hose twisted or frozen? NO Is the impeller of the drain pump clogged? NO Is the connector disconnected, disassembled? NO Is the coil of the drain pump too high or low? (resistance of the coil is 10-20 Ω) NO YES Repair the DRAIN HOSE ASSEMBLY. YES Remove foreign material. YES Reconnect or repair the connector YES Replace the DRAIN PUMP ASSEMBLY. When checking voltage between connectors during NO spin, is the voltage 120 V AC as in the figure? Replace the MAIN PWB ASSEMBLY. 28