LG WM2077CW Service Manual - Page 18

7. TROUBLESHOOTING 7-1. BEFORE PERFORMING SERVICE Be careful of electric shock when disconnecting parts while troubleshooting. The voltage of each terminal is 110/120 V AC and DC when the unit is plugged in. 7-2. QC TEST MODE. The washer must be empty and the controls must be in the off state. 1. Press the SPIN SPEED and SOIL LEVEL buttons simultaneously. 2. Press the Power button, while the above condition. Then buzzer will sound twice. 3. Press the Start/Pause button repeatedly to cycle through the test modes. Number of times the Start/Pause button is pressed None Check Point Turns on all lamps and locks the door. 1 time Tumble clockwise. 2 times Low speed Spin. 3 times High speed Spin. 4 times Inlet valve for prewash turns on. 5 times Inlet valve for main wash turns on. 6 times Inlet valve for hot water turns on. 7 times Inlet valve for bleach turns on. 8 times Tumble counterclockwise. 9 times Heater turns on for 3 sec. 10 times Circulation pump turns on. 11 times Drain pump turns on. 12 times Power off and unlock the door. Display Status rpm (40~50) rpm rpm Water level frequency (25~65) Water level frequency (25~65) Water level frequency (25~65) Water level frequency (25~65) rpm (40~50) Water temperature Water level frequency (25~65) Water level frequency (25~65) Turn off all lamps. 1) : WM2277H*/WM2177H* : WM2077CW : WM2677H*M 7-3. HOW TO CHECK THE WATER LEVEL FREQUENCY Press the SPIN SPEED and SOIL LEVEL button simultaneously. The digits indicate the water level frequency ( x.1 kHz ). So, for example a display indicating 241: a Water level frequency of 241 x.1 kHz = 24.1 kHz 17