Kentec Electronics Sigma XT Plus Operation And Maintenance Manual

Also see for Sigma XT Plus: Operation and maintenance manual

Contents

Kentec Electronics Sigma XT Plus Operation And Maintenance Manual Manual pdf 39 page image

Man-1112 Sigma XT+_23 Page 39 of 5216.12 System fault – Extinguishant modulesThe System Fault and general fault LEDs will light if the configuration memory has not been set or has becomecorrupted.16.13 General fault – Detection sectionThe 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 EnableControls keyswitch is turned off.16.14 Lamp testAll 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 than2 seconds.16.15 Hold conditionActivation of the Hold input or a fault on the monitored wiring of the Hold circuit on a module or at a remotelymounted status unit will cause the Hold Activated indicator to light on the module and on any status units orancillary boards connected to it.If the extinguishant module is in the Activated condition and the pre-release timer is running then theextinguishant release sequence will be halted and the pulsing, 2 nd stage sounders shall change to 1 second on, 2seconds off.Release of the Hold input will re-start the pre-release timer from maximum.16.16 Released conditionThe released pressure switch input will be connected to a pressure switch mounted on the extinguishant cylinderwhich operates when the extinguishant has been released. This will activate the released indicator on the controlpanel. If the extinguishant has been released by mechanical means i.e. the control panel is not in the activatedcondition, operation of the released pressure switch input will establish the Released condition. (See also 15.2.8)16.17 Low pressure switchThe low pressure switch input will be connected to a pressure switch on the extinguishant cylinder which willoperate if the pressure in the cylinder falls below a set point. This will happen after the extinguishant has beenreleased but may happen before release through a leak. The fault LED on the module and on the detection partwill light and the buzzer will sound when this input is operated.16.18 Manual only modeThe mode of the system can be toggled between Manual Only and Automatic & Manual by operating the Modeselect keyswitches on the modules.When a module is in Manual Only mode, the extinguishant cannot be released by the operation of automaticdetectors.The mode can also be changed to manual by the external mode select input or a keyswitch on a status unit. Anymode select input that is switched to Manual only mode will override any keyswitches switched to Automatic andManual mode. All inputs must be switched to Manual and Automatic mode for a module to be in Automatic andManual mode.16.19 Manual ReleaseExtinguishant modules may be activated by Manual release inputs via the manual release control on the front ofeach module, a remotely mounted Manual release control connected the monitored manual release inputs or by amanual release control mounted on a status unit.Activation of any of these Manual release controls will immediately activate the extinguishant module and beginthe pre-release timer if the module is configured to have a time delay for Manual release inputs.16.19 Abort inputEach module has the facility for connection of an Abort control. Operation of the Abort input or a fault on themonitored wiring of the Abort circuit during the pre-release delay time or before activation will light the Abortindicator on the module and the extinguishant release timer will be canceled i.e. the extinguishant will not bereleased. The module can be immediately reset from this condition.