N
2
-Generator
– User Manual
22 / 31
7.2 Alarms and Signals
During normal operation the
red LED (3)
is OFF and the system carries out several
automatic checks.
In the event of minor anomalies or services request the yellow LED is ON when the
red LED flashes to signal a
pre-alarm
message
(the flashes number of red LED
identifies the type of founded problem)
in these cases the unit does not stop the N2
production.
In the case of serious anomalies, the red LED flashes to signal an
alarm
message
(the flashes number identifies the type of founded problem)
and nitrogen production
stops immediately.
The difference between pre-alarm and alarm signal is shown as follows:
Pre-alarm
→ yellow LED on steady when the red LED flashes.
Alarm
→ yellow LED off and red LED flashing.
7.2.1 Pre-alarm
When a pre-alarm is activated, the green LED in On steady, the yellow LED is On
steady when the red LED comes on in the following sequence:
Flashes (to indicate the pre-alarm)
– Off – On for 4 seconds.
The signal depends on the number of flashes, as shown in the table below:
Flashes
Description
Pre-
alarm
2
Column charge
x
