System Options MenuPage 58Mains Fail DelayThis option allows you to specify the length of time (0 to 60 minutes) that the control unitmust wait after detecting a mains supply failure before reporting Mains Fail to the ARC.When the mains supply fails, the control unit lights the red alert LEDs around thenavigation key within a few seconds of the failure, activates any output programmed asGeneral Fault and logs the Mains Fail event (in the mandatory log).Note: Keypads do not show alerts while the system is set.The control unit does not report mains interruptions of less than 9 seconds to the ARC. Ifmains is restored within that time, the control unit switches off the red LEDs, deactivatesthe General Fault outputs and logs Mains Restore.If a mains interruption lasts for longer than 9 seconds, the subsequent additional actionsdepend on the value in Mains Fail Delay: If Mains Fail Delay is set to 0, the control unit starts an alert tone ten seconds afterthe mains fail at the keypads and communicates a mains fail signal to the ARC(provided a communicator is fitted). At the same time, the control unit activates anyoutputs (including plug-by outputs) of type AC Fail. If Mains Fail Delay is set to 1-60 minutes, the control unit starts the mains fail delaytime ten seconds after the mains fail.If mains power is restored before the end of the mains fail delay, the control unitswitches off the red LEDs, deactivates any General Fault outputs and logs themains restore. The control unit does not send any report to the ARC.If the mains fail condition is still present at the end of the mains fail delay, thecontrol unit starts an alert tone at the keypads and communicates a mains fail signalto the ARC (provided a communicator is fitted). At the same time, the control unitactivates any outputs of type AC Fail.A user can silence the alert by pressing the navigation key and entering a validaccess code. The keypad displays details of the alert. The General Fault and ACFault outputs remain active.Once mains power is restored, the control unit deactivates any AC Fail outputs andlogs the mains restore. A user can reset the alert and deactivate any General Faultoutputs by pressing the navigation and entering the access code again.Linked Zone TimeThis defines the time within which two zones that have the Linked Zone attribute mustactivate to trigger an alarm. See page 31. This option is available only if there is a zonethat has the Linked Zone attribute.Panel Tamper ReturnThis option allows you to select either CC or FSL for the Tamper Return (TR) terminal onthe control unit's PCB. By default, the terminal is CC. If you select FSL, you should insert a2k2 resistor in series with the tamper return wire from the sounder.