Diagnosis Levels; Behaviour In Degraded Mode - Siemens FDS221-W Technical Manual

Structure and function
3
Function

3.2.4 Diagnosis levels

Indication
'No deviation'
Any fault message

3.2.5 Behaviour in degraded mode

18 | 50
Building Technologies
Fire Safety
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.
Meaning
Normal, no fault is present
The alarm sounder is fully functional
Fault present
Invalid parameter settings
Alarm function no longer ensured
(Piezo element defective)
Supply error
Software error (Watchdog error)
Memory error
Communication error involving device
and control panel
The status 'Any fault message' can be displayed together with another status, e.g.
'needed excha.' (replacement necessary).
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.
Measures
None
Set valid parameters
Replace alarm sounder
Check detector line voltage
Exchange device
Exchange device
Exchange device
Remedy cause
008109_m_en_--
2016-02-09