Clear-Com HX System Frames - Manual (Page 68)

5.7.3 Alarm reset button
When the alarm reset button is pressed the following events take place, even if the alarm
condition has not been corrected:
• The internal audible alarm buzzer stops buzzing.
• Any wired relay contacts return to their inactive state. If these relays are connected to
external alarm lights or alarm buzzers, those lights or buzzers shut off.
• If the original alarm condition still exists, the red main alarm light on the matrix’s front
panel continues to flash. The red main alarm light only stops flashing when all
original sources triggering the alarm are corrected.
• If a new alarm condition or conditions occur before the original alarm conditions are
corrected, the internal buzzer and relay contacts will not reactivate. They will only
reactivate after all original alarm conditions are corrected.
5.7.4 Auxiliary alarm lights
When an alarm condition occurs, any of the six auxiliary red alarm lights may switch on, in
addition to the main alarm light, to help diagnose the alarm condition. The following sections
describe the six auxiliary alarm lights.
External alarm (EXT ALARM)
The red external alarm (labeled EXT ALARM) light switches on to indicate that an alarm
condition has triggered the built-in relay outputs to turn on any externally installed alarms
such as lights or bells.
The external alarm is connected to the matrix through the 9-pin D-type connector on the
matrix’s rear panel labeled Alarm I/O.
Temp alarm (Temperature alarm)
The red Temp (temperature) alarm light switches on to indicate one or both of the
following:
• The active CPU card has detected a temperature in the matrix above a threshold.
• One of two CPU cards has been removed from the matrix.
Note:
This feature only operates if there are two CPU cards installed in the matrix. If there
is only one CPU card, the Temp alarm light does not switch on if the card is removed.
Fan-fail alarm
The red fan-fail alarm light illuminates when either fan in the power-supply module stops
rotating correctly.
68 Eclipse HX-Median User Guide