The FB is equipped with eight LED indicator lights.
Signalling unit has been turned off or is in test
mode
Signalling unit is in operation
Signalling unit has no power supply or is not in
operation
Signalling unit is in battery-test mode
Battery is malfunctioning
One or more phases have been interrupted
(phase signalling)
The audio or visual signal and the telephone
dialler output are temporarily inactive (+/- 15
min.). (After pressing the reset button)
Telephone dialler output is inactive
The audio or visual signal is inactive
If none of the LEDs is on continuously or flashing, then the signalling unit is not in operation. In this case,
check to see whether the signalling unit is connected correctly and whether the power supply / battery are
OK.