VESDA VLC-400 Product Guide
VESDA by Xtralis
40
www.xtralis.com
Fault No.
Description
Cause
Action
Fault Classification
54
Urgent low airflow
The airflow in the
detector is below the
‘Urgent Low’ threshold.
Inspect pipe work and
sampling holes for
blockages and rectify.
Blocked pipe work
renders the system
much less sensitive to
smoke in the protected
area. Re-normalize if
necessary. Perform
’Normalize Airflow’ via
Xtralis VSC.
Urgent
56
Clock failed
The real time clock is
not functioning properly.
Contact your authorized
Xtralis representative to
rectify the unit.
Minor
59
Fault test
A fault test is in
progress.
This fault will clear when
the test has finished.
Note:
A fault test can
only be started using
Xtralis VSC. The fault
can be cleared by
prematurely ending the
test.
Urgent
73
Filter clogging
The detector is overdue
for a filter change.
Change the filter
immediately.
Urgent
75
Normalization has failed There was an error
during the
Normalization process.
Investigate whether
there are differential
pressures between the
protected area and the
detector that exceed
50Pa.
Ensure that there are
enough sampling holes
– the minimum for
standard configurations
is 3 holes. Ensure the
exhaust bung is
removed. Introduce
backventing if
necessary.
Minor
76
Filter replaced but not
acknowledged
The filter has been
removed and replaced
but not acknowledged in
the software.
From the ‘Device’ menu,
select the ‘Reset Filter
Settings’ command.
Urgent
77
Normalizing in progress Normalization is
currently in progress on
one or more detectors
on the network.
This fault is generated
as a reminder that the
detectors normalizing
the airflow. This will
clear when
normalization
completes.
Minor
80
No factory flow
calibration
Flow calibration has not
been performed at the
factory as expected.
Contact your supplier for
a replacement unit.
Minor
81
Default variant
configuration
Detector type, current
band, sensitivity and
delay configuration
remain at factory default
settings.
Finish detector
configuration.
Urgent
Table 10-2: VLC-400 Applicable Faults and Classification List (continued...)
The Troubleshooting section in the Xtralis VSC online help contains a comprehensive listing of faults including
probable cause and action to be taken to rectify the fault.