VESDA
®
LaserPLUS Product Guide
5
OK LED
The OK LED stays illuminated during normal operation indicating the unit is
functioning normally. When this LED is off a warning beep sounds, indicating a
Fault condition is active.
Isolate LED
This LED is illuminated when the detector is Isolated and relays are de-
activated disabling alarm outputs of the detector. The display can be
programmed to beep every 60 seconds.
Alarm Levels
ALERT: When illuminated this LED indicates that the
smoke level is above the alert threshold. This means
the detector has identified very early stages of a fire
condition and/or that the smoke level in the area is
above normal.
ACTION: When illuminated this LED indicates that the
detected smoke level has passed the threshold value
fixed for Action, but is not intended to initiate a general
fire alarm response procedure.
FIRE 1: When illuminated this LED indicates that the
detected smoke level is above the threshold value set
to initiate a general fire alarm response procedure.
This indicates a fire may be imminent or is in
progress. When interfaced with a Fire Alarm Control
Panel (FACP) it can generate an automatic fire alarm.
FIRE 2: When illuminated this LED indicates a fire is in progress. The detector
can be interfaced with an FACP to activate automatic suppression systems
and evacuation procedures.
Bar graph
The Bar graph is a 20 step indicator where each indicator represents an
increase in the detected level of smoke, relative to the preset fire alarm level.
Threshold
Indicators
The illuminated LEDs represent visual settings for ALERT, ACTION, and FIRE
1 alarm levels. The FIRE 1 indicator is always at the top.
Fault LEDs
The Fault LEDs illuminate to indicate:
URGENT: A serious fault requiring immediate attention
SYSTEM: A fault affecting the network to which the Display Module is
connected
ZONE: A fault in the VESDA Zone monitored by the Display Module
POWER: A fault in the power supply if the GPI function is used
NETWORK: A communications fault on VESDAnet
AIRFLOW: Higher or lower than acceptable levels of air flow through the inlet
pipe(s)
FILTER: The air filter requires changing
Figure 4 - IllumInated lights showing faults
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