NORTHROP GRUMMAN NAVIGAT X MK 1, Operation, Installation And Service Manual

Page: 38 / 110

056343/C NAVIGAT X MK 1
3-2 Acknowledging Alarms/Muting the Audible Alarm
3.2 Acknowledging Alarms/Muting the Audible Alarm
Alarm Acknowledge
Alarm Mute
To acknowledge a pending alarm at the NAVIGAT X MK 1:
Press Shift-F1 .
The alarm message is cleared and the audible
alarm is muted.
As long as the cause of the alarm is present, the
alarm remains “active”. The currently active
alarms may be viewed in the error list in the
Service Setup 2.
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Note When an alarm has been acknowledged, the ext. alarm status output
remains active until the cause of the alarm is eliminated.
When the cause of an alarm is eliminated, the alarm is acknowledged
automatically and the alarm status is cleared.
The NAVIGAT X MK 1 does not keep a history of past (inactive) alarms.
To mute the audible alarm at the NAVIGAT X MK 1:
Press Shift-Reset .
The audible alarm indication is muted.
The visible alarm indication is not cleared and
the alarm remains in the pending state until it is
acknowledged by the operator.