Fermax 94891EIc Manual De Instrucciones página 61

Select Contrast
The contrast of the Guard Unit graphic display can be adjusted for optimum
viewing. To do so, proceed as follows:
1. Enter code A55555
To do so, enter the sequence: 0 A 5 5 5 5 5
Note: The number of '5' digits that we have to enter (3, 4 or 5) will
depend on the length of the access code configured in the system (4,
5 or 6)
2. Use the arrows to select contrast
3. Press 'B' to validate
The contrast value selected is stored in a non-volatile memory, so that
even when the power is off, the set value will be kept.
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