
Engineering Manual Engineer Menu 1-9
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Option 12 AC Bypass must be set to “Always” (default) to allow a telecommand to override
Control unit Mains Fail, Remote PSU Mains Fail, PSU Power Zone Type alerts.
Option 14 LF Bypass must be set to “Always” (default) or “User” to allow a telecommand to
override PSTN faults.
Option 19 Battery Fault Override must be set to “Always” to allow a telecommand to
override battery faults.
07 – 4k4 = Masking
Masking – The control unit treats a resistance of 4k4 on a wired detector as a Masking
signal.
Fault – The control unit treats a resistance of 4k4 on a wired detector as Fault Signal.
Note: Compliance with PD6662/prEN51031-1:2006 Grade 3 requires that detectors report fault
conditions.
08 – Mask Override / Mask Inhibit
Mask Override – Users can set a ward that has a mask fault (page 26).
Mask Inhibit – Users cannot set any ward if there is a mask fault anywhere on the system
(page 26).
09 – Mask Unset Fault / Mask Unset Tamp / Mask Unset Alarm
Mask Unset Fault – The system will consider a masking condition (page 26) when the zone
is unset as a fault condition. Outputs programmed as Mask Fault (system output; page 49)
or Mask Flt (ward output; page 57) will activate.
Mask Unset Tamp – The system will consider a masking condition when the zone is unset
as a tamper condition. Outputs programmed as Mask Tamper (system output; page 49 or
Mask Tamp (ward output; page 57) will activate.
Mask Unset Alarm – The system will consider a masking condition when the zone is unset
as an alarm condition. Outputs programmed as Mask Alarm will also activate.
10 – Mask Set Fault / Mask Set Tamper / Mask Set Alarm
Mask Set Fault – The system will consider a masking condition (page 26) when the zone is
set as a fault condition. Outputs programmed as Mask Fault (system output; page 49) or
Mask Flt (ward output; page 57) will activate.
Mask Set Tamper – The system will consider a masking condition when the zone is set as a
tamper condition. Outputs programmed as Mask Tamper (system output; page 49 or
Mask Tamp (ward output; page 57) will activate.
Mask Set Alarm – The system considers a masking condition when the zone is set as an
alarm. Outputs programmed as Mask Alarm will also activate.
11 – AC Fail:No Reset / User / Engineer
No Reset – An AC Mains Fault alert will exist while the mains supply is switched off, but
will automatically disappear when the mains is restored. The control unit monitors its own
power supply, any remote PSU connected to a network, and any PSU reporting back to the
control unit by means of a zone with type PSU Power. No resetting of the alert is required.
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