LG ThermaV Owner's Manual page 49

Child Lock
This function is to prevent children or other people from using controller.
1
Press Function Setting Button to enter
user setting mode.
(The segment will be flashed)
2 Press set / clear button to finish the selection.
The segment will be disappear.
3
During Child Lock,
displayed during 3 seconds whenever
entering any kind of buttons except for view
temperature button and setting/clear button .
4 To release this setting, pressing
function Setting button until
icon flash and then enter
setting/clear button.
Owner's instruction
icon and 'CL' will be
Owner's Manual 49