WD1316ADA7 - LG Washing Machine Service Manual (repair manual). Page 15

5-3. SPECIAL FUNCTIONS

The option buttons also activate special functions, including CHILD LOCK, LOAD SIZE, TUB CLEAN, and

SIGNAL ON/OFF. Press and hold the option button marked with the special function for 3 seconds to activate.

Use this option to prevent unwanted use of the washer or to keep cycle settings from being

changed while the washer is operating. Press and hold the PRE WASH button for 3

seconds to activate or deactivate The child lock function The child lock indicator will be 

shown in the display. And all buttons are disabled except the ON/OFF button
NOTE: CHILD LOCK lasts after the end of cycle. If you want to deactivate this function,

Press and hold the PRE WASH button for 3 seconds. 

PRE WASH