Section 4: Operating Instructions; Panel Control Buttons; 1: Acknowledge/Step; 2: Alarm Silenced - Honeywell GF505 Manual

Fire alarm control panels

page of 124

/ 124
Contents
Table of Contents
Bookmarks

Table of Contents

4.1 Panel Control Buttons

4.1.1 Acknowledge/Step

The first press of the Acknowledge/Step key silences the piezo sounder, changes flashing LEDs to steady and also changes the status field

on the LCD display from capital letters to small letters (TROUBL to Troubl). When the piezo is silenced, an acknowledge message is sent

to the printer and the history file. Acknowledge also sends a silence piezo command to the optional annunciators connected to the FACP.

The Acknowledge key will have no effect on the Notification Appliance Circuits.

When more than one event exists, the first press of the Acknowledge/Step key functions as described in the preceding paragraph. Subse-

quent pressing of the key steps through each active event.

4.1.2 Alarm Silenced

The Alarm Silenced key performs the same functions as Acknowledge/Step except it will not step through each event when multiple

events are present at the panel. If an alarm exists, the Alarm Silenced key turns off all silenceable NACs (Notification Appliance Cir-

cuits) and causes the Alarm Silenced LED to turn on. It also sends an 'alarm silenced' message to the printer, history file and optional

annunciators. A subsequent new alarm will resound the system NACs. The Alarm Silenced LED is turned off by pressing the Reset key,

the Drill key or subsequent activation of the NACs.

Note that if Silence Inhibit has been enabled, NACs cannot be silenced for one minute following initiation of an alarm.

4.1.3 Drill/Hold 2 Sec

When the Drill key is held for a minimum of two seconds (time required to prevent accidental activations), the FACP turns on all NAC

outputs and turns off the Alarm Silenced LED if it was previously on. The EVAC IN SYSTEM message is shown on the LCD display. The

same message is sent to the printer and history file. The Alarm Silence key can be used to turn off all silenceable NAC outputs following

activation by the Drill key.

4.1.4 Reset

Pressing and releasing the Reset key turns off all NACs, temporarily turns off resettable power to 4-wire detectors, causes a RESET IN

SYSTEM message to be displayed on the LCD and sends the same message to the printer and history file. It also performs a lamp test by

turning on all LEDs, piezo sounder and LCD display segments after the Reset key is released. Any alarm or trouble that exists after a

reset will resound the system.

Note that if Silence Inhibit has been enabled, the FACP cannot be reset for one minute following initiation of an alarm.

4.2 LED Indicators

The five LED indicators, which are located on the front panel, operate as follows:

AC Power

This is a green LED which illuminates if AC power is applied to the FACP. A loss of AC power will turn off this LED

Fire Alarm

This red LED flashes when one or more alarms occur. It illuminates steady when the Acknowledge/Step or Alarm Silence key is pressed.

The Fire Alarm LED turns off when the Reset key is pressed. The LED will remain off if all alarms have been cleared.

Supervisory

This is a yellow LED that flashes when one or more supervisory conditions occur, such as a sprinkler valve tamper condition. It illumi-

nates steady when the Acknowledge/Step or Alarm Silence key is pressed. It turns off when the Reset key is pressed and remains off if all

supervisory alarms have been cleared.

Trouble

This is a yellow LED that flashes when one or more trouble conditions occur. It stays on steady when the Acknowledge/Step or Alarm

Silence key is pressed. The LED turns off when all trouble conditions are cleared. This LED will also illuminate if the microprocessor

watchdog circuit is activated.

Alarm Silenced

This is a yellow LED that turns on after the Alarm Silence key is pressed while an alarm condition exists. It turns off when the Drill or

Reset key is pressed.

4.3 Normal Operation

With no alarms or troubles in the system, the display message is System All Normal along with the current time and date as shown below.

To set the time and date, refer to the appropriate section in this manual.