Product Overview
2.6.2
Response to Fault Indication
If a failure is found, the detector indicates by:
•
Fault relay:
•
Opens in wiring options 1, 2, and 4
•
Closes in wiring options 3 and 5
•
0-20mA: indicates fault (0mA or 2mA) in wiring options 1, 2, and 3
•
LED
–
yellow flashes (4Hz)
•
Correcting the fault
The fault indications remain until the detector’s power is removed. The fault
indications return if the fault is still found when power is restored.
2.6.3
Built-In-Test (BIT)
The detector’s Built
-In-Test (BIT) also checks the following:
•
Electronic circuitry
•
Sensors
•
Window cleanliness
The detector can be set to perform the BIT in the following modes:
•
Automatically and manually
•
Manually only
Note:
In Manual BIT, the outputs may also be tested and Control System
“inhibit” should be applied if this could initiate other systems.
2.6.3.1
How the BIT Operates
•
The detector's status remains unchanged if the result of a BIT is the same as
the current status (normal or BIT fault).
•
The detector
’
s status changes (from normal to BIT fault or vice versa) if the
BIT differs from the current status.
Note:
In BIT fault status the detector can continue to detect a fire.
