Smeg FC200UXE Detailed Instructions page 18

ECO FUNCTION
SAFETY BLOCK (CHILD SAFETY LOCK)
18
To activate the Eco function, press the G
key. With this function activated, appliance
will operate with optimum settings.
Use this function if you do not wish to
manually adjust the appliance settings.
To activate, press and hold the B key (for
three seconds); LL will appear on the
display E.
This will lock all keys except B.
To deactivate the safety lock, press the B
key and hold it for three seconds.