4 Alarm Conditions
4.1 Introduction
An alarm condition occurs when an initiating device (such as a manual pull station, or a smoke detector) activates. The FACP indicates the
presence of the alarm condition through messages it displays on the LCD screen, by flashing the ALARM indicator, and by activating the
building's notification appliances (horns and strobes).
Note:
An alarm condition is a serious event, indicating the possibility of fire danger. In addition to using the FACP operator interface panel
to investigate and manage alarm conditions as described in this chapter, you should also be aware of any facility-specific procedures that
you may be required to follow.
4.2
Acknowledging an Alarm
When an alarm condition is detected by the FACP, the panel does the following to indicate the presence of the alarm.
• The red LED and the labeled Fire Alarm flashes
• The tone-alert (piezo buzzer) pulses
• The LEDs on the remote annunciators may illuminate
• The LCD on the interface panel indicates an alarm condition. The exact manner in which the display reports information for the alarm
condition depends on which system display is enabled. There are six ways that InfoAlarm can display an alarm.
4.2.1 How the FACP Indicates that an Alarm has Occurred
The following display options are available for all alarm (Priority 2 and Fire), Supervisory, and Trouble conditions:
•
Display First-Last
: In an alarm situation in which first-last display has been selected, the first alarm will appear on the screen
followed by the most recent alarm below it. Each device that reports an alarm condition will identify the time and date of the report
followed by the point type and the custom label.
Figure 5: First-Last Display
•
Display First-5-Last
: In an alarm condition in which “first-5-last” display has been selected, the first 5 alarm situations will appear on
the screen followed by the most recent. Each alarm report displays the custom label followed by the point type, starting with the first
alarm, and moving down the list until the fifth, and finishing with the most recent. If fewer than 5 devices report an alarm condition,
the most recent device appears in the most recent alarm space with the preceding alarms added from the top until all five reports are
present. Only the times of the first and most recent alarm appear in the list.
Figure 6: First-5-Last Display
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579-685 Rev. D
InfoAlarm Operator’s Manual 4100U, 4100ES, 4010ES
