Call Engineer; Device Isolated; Loop Monitoring - Kidde Fire Protection ANTARES Manual

date and time on the top line and panel status on the bottom line.
TUE 15 MAR 21:45

2.4.14 Call Engineer

All fault conditions will remain indicated until a panel reset is carried out. If the fault condition
still exists the fault condition will be re-activated. Hence if a fault is intermittent the panel can
be cleared by a simple reset and the system left in an apparently healthy condition. Hence for
certain faults the panel will revert to the CALL ENGINEER mode on reset. The buzzer will beep
every twenty seconds until the panel is cleared. This requires a special four digit code to be
entered via the keypad. The LCD/VFD display is illustrated below.
TUE 15 MAR 21:45

2.4.15 Device Isolated

Apart from the DEVICE ISOLATED LED being illuminated the condition where one or more
devices are isolated is confirmed by the LCD/VFD. Instead of displaying STATUS NORMAL
or PANEL IN ACCESS, the second line of the display will read DEVICES ISOLATED.
2.5

LOOP MONITORING

Each loop is fed back, in a ring, to the panel, where it is continually monitored for any break or
short circuit. If this occurs, the panel then communicates in both directions round the loop in
order to maintain integrity to the system. In order to meet the requirements of BS5839 Part 1
Paragraph 6.6.2, it is necessary to use line isolators. Each fire compartment that the loop passes
through requires an isolator to be fitted at the boundary.
With isolators fitted the panel records a loop fault for the appropriate loop whilst all the other
loops remain operational. The panel then drives the loop in both directions. When the loop fault
is an open-circuit no further indication is recorded as all the devices will be maintained. With
a short-circuit fault the devices located on the section of wiring containing the short will be
shutdown and hence will be recorded as faulty devices.
Note Due to the scanning nature of addressable systems, that even when isolators are
fitted, spurious operational of devices can occur when an intermitted short-circuit
is applied to the loop, i.e random fires or operation of loop output devices can be
caused.
TM0064
PANEL RESET
Fig 1.4.14
*PLEASE CALL ENGINEER*
Fig 1.4.15
Page 39 of 91 Issue 2.01