Siemens FDL241-9, Technical Manual

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Structure and function 3
Function
26
Building Technologies
007016_i_en_--
Fire Safety 2012-09-07
3.3.5 Diagnosis levels
For the most part, the linear smoke detector monitors its functionality
autonomously.
The following diagnosis levels are derived from the different control measurements:

Normal

Observe information

Fault
For details, see table below.
When a fatal error (one which impairs the detector's function) occurs, a fault
message is signaled. To correct the cause of the fault, additional information is
available in the detector. This can be displayed by the detector exchanger and
tester FDUD292 or the intelligent detector tester FDUD293, for example.
Information displayed on the
detector exchanger and tester
Meaning Measures
'no deviation' Normal, no fault is present
The detector is fully functional None
'maybe excha.'
1
Observe information
Compensation value is too high or too low
Detector is fully functional, reflection or dirt
cannot however be compensated for

In the case of dirt, clean the detector
and reflector and re-initialize them

In the case of reflection, remove or
cover reflecting objects
'In 1 problem 3'
1
Observe information
Repeated ray interruption Prevent interruption or position detector in
another place
'In 1 trouble 1'
1
Fault
Detection is no longer ensured
Signal interruption: Signal <10 % of the
compensation value

Remove obstacle

Clean the detector and reflector and re-
initialize them
'In 1 trouble 2'
1
Fault
Detection is no longer ensured
Distance interruption: distance measuring
less than 40 % of the detection distance
during initialization
Remove obstacle