Siemens FC901-U3 Installation, Operation And Maintenance Manual page 67

Ground Fault
Audibles On
The buzzer operates as follows:
Normally OFF – indicates that the system is in normal condition or all events in the system
have been acknowledged.
ON (200 pulse per minute) – indicates that at least ONE unacknowledged alarm is present in
the system.
ON (85 pulse per minute) – indicates that at least ONE unacknowledged non-alarm (trouble,
supervisory) event is present in the system.
OFF
Flashing
Steady ON
OFF
Yellow
Flashing
Steady ON
Red
OFF
This indicates that there is no supervisory
event in system.
This indicates that there are supervisory events
in system, but some of them have not been
acknowledged.
This indicates that there are Ground Fault
events in system.
This indicates that there is no Ground Fault
event in system.
This indicates that there are ground fault
events in system, but some of them have not
been acknowledged.
The Audibles On LED can only be steady on
when any of the following conditions are met:
1. There are activated NACs and some of
them are not silenced.
2. There are silenceable devices activated
and some of them are not silenced.
The Audibles On LED will be OFF when above
conditions are not met.
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