VESDA VLF-500 Product Guide
VESDA by Xtralis
34
www.xtralis.com
6.4
Smoke level & Instant Fault Finder displays
Under normal operating conditions the circular Smoke Dial displays smoke levels in sampled air. Through
Instant Fault Finder, the Smoke Dial temporarily changes the segments into fault indicators, with each
segment corresponding to a specific fault condition.
6.4.1
Smoke level display
The smoke level is displayed on the Smoke Dial (A) and provides incident information essential for effective
response in very early warning situations. This display provides you with an instant understanding of the
smoke event relative to the Fire 1 Alarm Threshold. Between 1 and 10 segments may illuminate. Each
segment is equivalent to 1/10 of a Fire 1 warning.
Legend
A
Smoke Dial and Fault Type indicator.
C
Disable button.
B
Reset button.
D
Fault light.
Figure 6-5: Smoke level and fault condition display
6.4.2
Instant Fault Finder
When a fault is registered on the detector, the fault light (D) remains on for Major Fault situations and flashes
for Minor Fault.
The Instant Fault Finder function is operated by pressing the Reset and Disable buttons together. Instant
Fault Finder provides rapid fault diagnosis and is an additional function of the Smoke Dial display. One or more
segments of the Smoke Dial will illuminate, indicating the fault by number. The table below provides fault
details and recommended actions.
6.4.3
VESDA VLF Troubleshooting with Instant Fault Finder
The Instant Fault Finder function aids rapid diagnosis of faults.
Fault
Type
Explanation
Action
1
Filter
Air filter needs replacement due
to dust or smoke contamination
or has reached the end of its life.
Replace the air filter with a new
unit remembering to reset the
filter fault.
2
Aspirator
Aspirator fault has occurred.
Initially replace the aspirator. If
the fault remains replace the unit.
Table 6-2: Instant fault finder diagnosis
