Fermax ADS Manual De Introducción página 56

Main Menu - Display
This menu lets you modify the contrast of the Guard Unit LCD screen.
To access "Display" from the main menu:
The contrast value selected is stored in a non-volatile memory, so that
even if the power is cut off, the set value will be kept.
Pag 24
1. Press "3"
The Display Menu offers two options:
Display Menu
CONTRAST
M1 decrease
M2 increase
B- Exit
2. Press the "Left Arrow (M1)" button to lower the screen
contrast.
Press the "Right Arrow (M2)" button to increase the
screen contrast.
Press "B" to confirm and exit the Display menu.
Display Menu
CONTRAST
M1 decrease
M2 increase
B-Exit