CAME LHS A/01 Installation And Configuration Manual page 29

SETTINGS
Audio and electric lock time settings
Call button brightness level control
Remove the rubber cap to access the settings.
Use a screwdriver and turn the screws clockwise (to increase) or
anticlockwise (to decrease).
The opening time of the electric lock can be set from 1 to 10
seconds (Default 1 second).
In [Programming calls], press any call button.
Every time you press the button, the fi ve brightness levels will show in
sequence (off , low, medium, high, maximum).