Kentec Electronics Sigma XT Plus, Руководство по эксплуатации и обслуживанию

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Man-1112 Sigma XT+_23 Page 39 of 52
16.12 System fault – Extinguishant modules
The System Fault and general fault LEDs will light if the configuration memory has not been set or has become
corrupted.
16.13 General fault – Detection section
The General fault LED will be illuminate under any fault condition.
This LED will also light if the write enable switch has been left in the access level 3 position and the Enable
Controls keyswitch is turned off.
16.14 Lamp test
All LED indicators on the panel can be tested at any time by pressing the Lamp Test button on the Detection part.
The Enable Control keyswitch does not need to be operated test the indicators.
Indicators on individual extinguishant modules cam be lamp tested by holding down the EXIT button for more than
2 seconds.
16.15 Hold condition
Activation of the Hold input or a fault on the monitored wiring of the Hold circuit on a module or at a remotely
mounted status unit will cause the Hold Activated indicator to light on the module and on any status units or
ancillary boards connected to it.
If the extinguishant module is in the Activated condition and the pre-release timer is running then the
extinguishant release sequence will be halted and the pulsing, 2
nd
stage sounders shall change to 1 second on, 2
seconds off.
Release of the Hold input will re-start the pre-release timer from maximum.
16.16 Released condition
The released pressure switch input will be connected to a pressure switch mounted on the extinguishant cylinder
which operates when the extinguishant has been released. This will activate the released indicator on the control
panel. If the extinguishant has been released by mechanical means i.e. the control panel is not in the activated
condition, operation of the released pressure switch input will establish the Released condition. (See also 15.2.8)
16.17 Low pressure switch
The low pressure switch input will be connected to a pressure switch on the extinguishant cylinder which will
operate if the pressure in the cylinder falls below a set point. This will happen after the extinguishant has been
released but may happen before release through a leak. The fault LED on the module and on the detection part
will light and the buzzer will sound when this input is operated.
16.18 Manual only mode
The mode of the system can be toggled between Manual Only and Automatic & Manual by operating the Mode
select keyswitches on the modules.
When a module is in Manual Only mode, the extinguishant cannot be released by the operation of automatic
detectors.
The mode can also be changed to manual by the external mode select input or a keyswitch on a status unit. Any
mode select input that is switched to Manual only mode will override any keyswitches switched to Automatic and
Manual mode. All inputs must be switched to Manual and Automatic mode for a module to be in Automatic and
Manual mode.
16.19 Manual Release
Extinguishant modules may be activated by Manual release inputs via the manual release control on the front of
each module, a remotely mounted Manual release control connected the monitored manual release inputs or by a
manual release control mounted on a status unit.
Activation of any of these Manual release controls will immediately activate the extinguishant module and begin
the pre-release timer if the module is configured to have a time delay for Manual release inputs.
16.19 Abort input
Each module has the facility for connection of an Abort control. Operation of the Abort input or a fault on the
monitored wiring of the Abort circuit during the pre-release delay time or before activation will light the Abort
indicator on the module and the extinguishant release timer will be canceled i.e. the extinguishant will not be
released. The module can be immediately reset from this condition.