3500/93 SYSTEM DISPLAY
40
New Alarm Overall Rack Status LEDs
Event LED
OK
Danger
Alert
Conditions
ON
New alarm event has been detected
since the last alarm event
acknowledgment. The LED can be
turned off by pressing the “Alarm
Event Acknowledgment” button.
OFF*
No new alarm event.
ON
All modules in the rack are OK.
OFF*
At least one module in the rack is not
OK.
ON
At least one of the active channels in
the rack is in Danger alarm status.
OFF*
None of the channels is in Danger
alarm status.
ON
At least one of the active channels in
the rack is in Alert alarm status.
OFF*
None of the channels is in Alert
alarm status.
= behavior of the LED is not related to the condition.
* = Off can also indicate that the Display Unit has lost communications with the
Display Interface Module, the Display Interface Module has lost SCI
communications with the Rack Interface Module, or the Display Interface
Module has lost Neuron
Communications.
