VESDA by Xtralis
VESDA VLF-500 Product Guide
www.xtralis.com
35
Fault
Type
Explanation
Action
3
High flow
High flow fault present (urgent or
non-urgent). Flow readings are
above user set flow limits or the
detector maximum flow
Check the pipe network for
breakages. Also check the
suitability of the pipe network in
ASPIRE.
4
Low flow
Low flow fault present (urgent or
non-urgent). Flow readings are
below user set flow limits or the
detector maximum flow
Check the pipe network for
blockages. Also check the
suitability of the pipe network in
ASPIRE.
5
Not in use
6
External Device / Power
Supply Unit
External equipment signaling a
fault via the General Purpose
Input.
Inspect the external device and
also check that the GPI is set to
the correct mode.
Also check that the EOL resistor
is correctly connected.
7
Interface card
Interface Card needs
replacement.
Replace the Interface Card.
8
Field wiring
General Purpose Input or
Interface Card wiring.
If no interface card is installed
check the GPI wiring for an open
circuit.
If an interface card is installed
refer to the card manual.
Refer to Section 2.7.2 on page 13
for further information.
9
AutoLearn fail
AutoLearn Smoke or Flow failed.
Repeat AutoLearn Smoke or Flow
process. Inspect logs if repeated
failures occur. AutoLearn Flow
will fail if there is an airflow fault
on the detector. Fix airflow fault
and restart AutoLearn.
10
Detector failure
A fault has occurred that cannot
be fixed.
Contact the supplier and replace
the detector.
Table 6-2: Instant fault finder diagnosis (continued...)
