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Praesideo 3.5 | Installation and User Instructions | 10 | Events
54
Fault events list
Fault events in alphabetical order:
Event message:
Amplifier failure
Originator:
Amplifier channel in which the fault occurred.
Extra information:
The LBB4428/xx Power Amplifier combines the
messages Amplifier failure and Amplifier overload.
Resetting of faults may take up to 20 seconds for the
LBB4428/00 Power Amplifier, because of the re-
calibration of the pilot tone. The LED of a fault reset
key on a call station keypad is not switched off until
the re-calibration is finished.
Description:
Logs the failure of an amplifier channel. This fault
event can only occur when the amplifier channel is
enabled with the configuration software.
Resolve:
When the unit disconnects or when the fault is
resolved manually.
Recommended action:
•
Check the amplifier output load or disconnect the
loudspeaker lines.
•
Switch the amplifier off and on again.
•
Acknowledge and reset the fault.
•
If the fault is persistent, replace the amplifier.
Bosch Security Systems | 2011-02
Event message:
Amplifier ground short
Originator:
Amplifier channel in which the fault occurred.
Extra information:
----
Description:
Logs the short-to-ground of an amplifier channel. This
fault event can only occur when the amplifier channel
is enabled with the configuration software.
Resolve:
When the fault disappears or when the unit
disconnects.
Recommended action:
Check the cabling of the loudspeaker line and its
insulation. This event can, for example, be generated
when uninsulated parts of the cabling are in contact
with the housing of the unit or the 19" rack.
Event message:
Amplifier loudspeaker line failure
Originator:
Amplifier channel in which the fault occurred.
Extra information:
----
Description:
Logs the end-of-line failure of an amplifier channel
(detected by LBB4442/00). This fault event can only
occur when the amplifier channel is enabled with the
configuration software.
Resolve:
When the fault disappears or when the unit
disconnects.
Recommended action:
Check the cabling of the loudspeaker line. If
necessary, repair it.
en | 419
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