Structure and function
Function
3
18 | 50
Building Technologies
008109_m_en_--
Fire Safety
2016-02-09
3.2.4 Diagnosis levels
The device monitors its operation largely autonomously. The following diagnosis
levels are derived from the different control measurements:
Normal
Fault
For details, see table below.
When a fatal error occurs, which impairs the proper function of the alarm sounder,
a fault message is signaled.
To correct the cause of the fault, additional information is available in the device.
The additional information can be displayed using e.g. the detector exchanger and
tester FDUD292 or the intelligent detector tester FDUD293.
You will find more information in documents 007227 and 009718.
Indication
Meaning
Measures
'No deviation'
Normal, no fault is present
The alarm sounder is fully functional
None
Any fault message
Fault present
Invalid parameter settings
Alarm function no longer ensured
(Piezo element defective)
Set valid parameters
Replace alarm sounder
Supply error
Check detector line voltage
Exchange device
Software error (Watchdog error)
Exchange device
Memory error
Exchange device
Communication error involving device
and control panel
Remedy cause
The status 'Any fault message' can be displayed together with another status, e.g.
'needed excha.' (replacement necessary).
3.2.5 Behaviour in degraded mode
Applicable for the FDnet/C-NET:
When the main processor of the fire control panel fails, the control panel works in
degraded mode operation. Depending on the control panel type, the fire control
panel can continue to perform the most important alarming and signaling functions
in degraded mode operation.
Alarm sounders with product version 30 are also activated and deactivated in
case of a fire alarm in degraded mode.
Degraded mode operation on the FDnet/C-NET is not supported in the same way
by all control panels. The information in the 'List of compatibility' and in the
corresponding control panel documentation must be taken into account during
project planning.
