Fault Diagnosis - Bosch Fireray 50 Product Information

Product Information Linear Smoke Detector Fireray 50/100RV

11.2. Fault diagnosis

Fault indicator
Fault LED
illuminated illuminated
permanently
Fault LED flashes
Alarm LED
illuminated illuminated
permanently
No fault message
when IR beam is
disrupted
Alarm triggered
when IR beam is
disrupted
Triggering of false
alarms
Possible cause
Beam path blocked by an obstacle
Reflector is contaminated/covered/
has fallen down.
Supply voltage too low.
Mode sliding switch in upper position
« »
( Direct )
Detector set-up changed on switch-
« »
ing to Operation .
The limit of automatic gain control has
been reached
« »
MODE Switch sliding switch in up-
« »
per position ( Direct ) and incom-
plete detector set-up
DIP switch 1 at OFF
« »
( Save alarm ),
the alarm display remains saved
Beam path (partially) blocked by an
obstacle
Detector receives partial IR signal,
e.g. via reflective surfaces near the
beam axis.
An object placed in the beam path for
testing has acted as the reflector.
Sensitivity to existing environmental
conditions set too high
Seite 21 von 22
Action
Check and/or ensure free visual line
in the area between the detector and
the reflector.
Check the status of the reflector and
clean it if necessary.
Measure supply voltage directly at de-
tector.
«
Set the switch to Operation
wait until the 60 s activation routine is
complete.
When operating the sliding switch
following the correct adjustment,
make sure that the setting is not
changed.
Clean detector lens and reflector and
correct mechanical adjustment!
Align detector vertically and horizon-
tally until the fault LED is permanently
illuminated. Then continue using fine
adjustment (switch in center position)!
Reset the detector by disrupting the
supply voltage for at least 5 s or
« »
select Reset on the fire panel
Ensure a free visual line in the area
between the detector and the reflec-
tor!
Cover reflector with a dark material to
test! Check detector's range of vision
for reflective objects!
For testing, use a non-reflective
material, maintain a greater distance
to the detector, cover the reflector as
directly as possible.
Set a less sensitive alarm threshold
(DIP switches 3 and 4):
normal= 35%, less sensitive= 50%
ST-FIR/ PRM1/ zab
PI - 34.85
»
and
601-F.01U.002.705
A1.en / 29.12.2004