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SIMPLEX 4120 NETWORK FIRE INDICATOR PANEL
OPERATOR MANUAL
2.3
ESSENTIAL ALARM CONDITION KEYS
The essential keys for alarm conditions are the <ALARM ACK>, <ALARM SILENCE> and
the <SYSTEM RESET> keys. The remaining keys are concealed by the access door and
are associated with advanced functions of the system. (See Advanced Functions Section
6.)
2.3.1 Alarm Ack (Acknowledge)
The <ALARM ACK> key is located directly under the SYSTEM ALARM LED. Pressing the
<ALARM ACK> key (twice for Individual Acknowledge or once for Global Acknowledge) will
cause the LED to change from flashing to a steady ON condition and silence the tone-alert.
Pressing the <ALARM ACK> key will:
• Select the next unacknowledged alarm point in the list for display (Individual
Acknowledge).
• Acknowledge the displayed point or acknowledge all points on the list (Global
Acknowledge).
• Scroll the points chronologically after all points have been acknowledged.
2.3.2 System Reset
The <SYSTEM RESET> key is used to return the system to its normal state after an alarm
condition has been cleared. When the <SYSTEM RESET> key is pushed, it will cause the
latched circuits to clear automatically. All circuits include initiating devices, relays, indicating
appliances, and all LEDs and indicators which are programmed to reset with the reset key.
The message, "SYSTEM RESET IN PROGRESS", will be displayed when the <SYSTEM
RESET> key is pressed.
With the Individual Acknowledge systems, when the alarm condition has reset, the SYSTEM
ALARM LED flashes and the system requires that the <ALARM ACK> key be pressed. The
message "SYSTEM IS NORMAL" followed by time and date should be displayed. This
process will take about 45 seconds.
If a zone stays in alarm during the reset period, the message, "SYSTEM RESET IN
PROGRESS", will be followed by the message:
ALARM PRESENT, SYSTEM RESET ABORTED
When "SYSTEM RESET ABORTED" is displayed, the system will remain in an alarm state.
The display will indicate the total number of alarms present in the system along with a
prompt to use the <ALARM ACK> key to review the points. These points do not require
acknowledgment. The tone-alert and the alarm LED will be on.
Document No: 4100-M004
June 1997
Page 13
Issue 1.0
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