4 Operations
4.1 Normal operation
Normal condition is the standard condition of operation. When no alarm or trouble conditions exist, the control unit's operator interface
shows the following:
• Green AC POWER LED is on steady.
• All other control unit indicator LEDs and local piezo are off.
• All NACs are off.
• All relays are in their normal state.
4.2 Fire alarm operation
An alarm condition occurs when an initiating device, such as a smoke detector or heat detector, activates.
When an alarm occurs, the control unit's operator interface shows the following:
• The respective zone’s red FIRE LED starts flashing.
• The local piezo produces a pulse tone.
• Alarms latch and are not allowed to clear automatically.
• Activates the general alarm relay and NAC.
• Communicates the alarm condition to the central station, and the remote station if programmed.
• The system stores an alarm event in the history file.
When you press the ACK key, the following actions occur:
• The respective zone’s FIRE LED illuminates steady.
• The local piezo turns off.
• The system stores an acknowledged event in the history file.
When you press the SILENCE key, the following actions occur:
• The yellow ALARM SILENCED LED turns on. There is no effect on any other LEDs.
• The system turns off the NAC, if programmed as SSIG.
• The system stores an alarm silence event in the history file.
• If a subsequent alarm occurs, the respective FIRE LED starts flashing, the Alarm Silenced LED turns off and the NACs and local piezo
resounds.
When you press the RESET key, the following actions occur:
• The system returns to its normal state if an alarm condition has been cleared and the respective zone’s FIRE LED turns off.
• All latched circuits reset automatically.
• Turns off all devices and circuits that are programmed to turn off when this key is pressed. For example, the NAC’s configured as RSIG
and Alarm relay (RRELAY).
• The system stores a system reset event in the history file.
• If a device remains in alarm state during the reset period, the system reset is aborted, and the system remains in the alarm state.
page 7 579-1403 Rev A
2004 Foundation Series Fire Alarm Control Unit Operation Guide
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