Man-1112 Sigma XT+_23
Page 38 of 52
16.4 Single zone Fire condition
Upon receipt of a fire condition by activation of a detector or call point, the Common Fire indicator on the detection
section will light, the fire buzzer will sound and the zonal Fire indicator(s) will flash at around 2Hz.
The fire and local fire relays will also operate and signal any systems to which they are connected.
Any sounders connected to the sounder circuits S1 & S2 on the detection section will operate. These sounders may
be silenced by operation of the silence alarm button with the enable keyswitch operated such that the panel is at
access level 2.
If the zone that has activated is contributing to the extinguishant release sequence on an extinguishant module
and the module is configured for coincidence activation, the Release Imminent LED on the module will flash, the
first stage relay contact will operate, the first stage sounder output will operate and the display will show:
preactivated
►
Pressing the Silence alarm button on the detection section will turn off the sounder outputs on the detection
section and the first stage alarm outputs on the extinguishant module.
16.5 Double zone Fire condition
Upon receipt of a second fire condition that contributes to extinguishant release on modules that are switched to
Automatic and Manual mode with their Hold inputs not active and the Disable Extinguishant function has not been
invoked, the detection section will respond as above and extinguishant modules will respond as listed below:
a)
The second stage alarm output will operate. (Sounder circuit S3)
b)
The 2
nd
stage contact will operate.
c)
The Activated indicator will operate
d)
The display will indicate
Activated
and show the time remaining until release in seconds.
e)
The extinguishant output will operate after the configured delay time and for the configured duration.
f)
The display will show
Activated Discharging
for the duration of the release time.
When detection zones have activated and the activated condition is reached (i.e. the Activated indicator is lit) it
shall not be possible to reset the extinguishant section of the panel until the Reset Inhibit timer has elapsed.
16.6 Silence/sound alarms
The Silence/Sound alarm button can only be operated at access level 2. (Enable Control keyswitch operated).
To silence the sounders, insert the Enable Control key, turn to the right and press the Silence/Sound alarm button.
When the sounders have been silenced, the Zone Fire LEDs will change from flashing to a steady state.
Pressing the Silence/Sound alarm whilst the control panel is in this silenced condition will cause the sounders to
operate again.
The sounders can be toggled on and off with the Silence/Sound alarm button as required.
16.7 Reset
To reset the panel, insert the Enable key, turn to the right then press the Reset button.
The extinguishant section will reset only after the Reset Inhibit timer has expired once the activated condition has
been established.
16.8 Detection Zone fault
Removal of a detector from its base or a fault on any of the zone wiring will cause the Fault LED and Zone Fault
LEDs to flash, indicating the zone in which the fault has occurred.
16.9 Sounder fault
A fault on the wiring to the detection section sounder circuits will cause the Fault LED to light and the Sounder
Fault LED to flash. A fault on the sounder circuits of extinguishant modules (alarm devices as required by
EN12094-1) will light the Fault LED on the detection section and on the extinguishant module. The extinguishant
module will display:
stage 1 alarms
fault
or
stage 2 alarms
fault
16.10 Power fault
Failure of the mains power or disconnection of the standby battery will cause the Fault and Power Fault LEDs to
light on the detection section indicating an abnormality in the power supply to the control panel. There will be no
indication of this condition on the extinguishant modules.
16.11 System fault – Detection section
The System Fault and general fault LEDs will light if the configuration memory has not been set or has become
corrupted.
