Vigilant MICROVAC Owner's Manual
Document: LT0109
Operation
Page 3-2
5 April 2000
Issue 1.31
This pushbutton does not operate in AUTOMATIC mode. In ISOLATE mode, the LED will
illuminate but no signals will be produced.
3.1.4 ALERT
PUSHBUTTON
The ALERT pushbutton has a toggle action : pushing it once will turn the ALERT function on,
and pushing it again will turn the ALERT function off. When the ALERT function is on, as
indicated by the yellow LED, the ALERT tones will be generated and the ALERT strobe
output turned on.
This pushbutton does not operate in AUTOMATIC mode. In ISOLATE mode, the LED will
illuminate but no signals will be produced.
In the event that two or more of the three functions ALERT, EVACUATE, and PA are
selected a priority method is used to select the output - PA has highest priority, EVACUATE
second highest, and ALERT lowest priority.
3.1.5 LAMP TEST PUSHBUTTON
The LAMPTEST pushbutton will illuminate all LED indicators and sound the beeper. (NB the
MAINS ON indicator is derived directly from mains input, and is not affected by the LAMP
TEST facility.)
3.1.6 SILENCE
PUSHBUTTON
The SILENCE pushbutton, when pressed briefly, will silence the beeper and cause any
flashing fault/alarm indicators to become steady. In MANUAL mode, if held in for 2 seconds,
it will clear any latched fault/alarm indicators if the fault or alarm no longer exists.
3.2
FRONT PANEL FAULT/ALARM INDICATORS
All fault and alarm indicators flash and the beeper sounds while the associated fault or alarm
is active and not acknowledged. (Conditions are acknowledged by a brief press on the
silence button.) Once the fault or alarm has been acknowledged or goes away the indicator
will be steady. Steady indicators can be cleared (for those conditions which have been
removed) by holding the SILENCE button for 2 seconds.
BGA Alarm
Indicates an alarm condition on the BGA input.
FIP Alarm
Indicates an alarm condition on the FIP input.
BGA/FIP Fault
Indicates a fault condition on the BGA or FIP input wiring.
Battery/Charger Fault
Indicates a fault in the battery or charger circuitry.
Audio Fault
Indicates a fault in the amplifier circuitry, output transformer, or in the speaker line
wiring.
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