LaserCOMPACT Product Manual
VESDA
®
4
Version 1.0
2.3 Operation
2.3.1 LED and Reset/Isolate Push Button Switch Functions
Refer to Figure 5 for the location of the LED indicators. The functions of the LED indicators on
the front panel from top to bottom and the push button Reset/Isolate switch are:-
Fire
This
RED LED
lights up when the Fire alarm threshold is initiated.
Pre-Alarm
This
RED LED
lights up when the Pre-Alarm threshold is initiated.
This LED flashes when the
Alert
alarm threshold is initiated and
*
Alert Overlay
in ON.
*The option to have an Alert warning is set in the programming as
Alert Overlay
. When this condition is ON the LED will flash and the
fault relay changes states in an Alert condition.
Fault
This
YELLOW LED
lights when a fault condition occurs.
It is also lit during airflow normalisation.
OK
This
Green LED
stays lit during normal operation; showing the unit is
healthy.
This LED flashes twice repeatedly during air flow normalisation and/or
three times repeatedly during AutoLearn.
Reset/Isolate
This
Yellow LED
is lit when the unit is Isolated. During this condition
the Pre-Alarm and/or Fire relay is de-energised (unlatched) if the
relays have previously been energised (latched).
(The default setting for the Fault relay is the energised (latched) state
unless altered during programming).
Reset/Isolate
Push Button
Switch
To Reset the unit, press this switch once.
To Isolate the unit, press and hold the switch for 2 seconds.
To De-isolate the unit, press and hold the switch again for 2 seconds.
While the detector is Isolated, any faults may be cleared by pressing
this switch once.
If a remote Reset switch has been fitted to the Reset terminals and is
set to the Isolate position
OR
If the Reset/Isolate button has been locked out in the programming,
this switch
will not operate
. Refer to Section 2.8 and 4.7.
