Bosch Appliances 3.5 Fault events list, Fault events in alphabetical order, Amplifier failure

Models: 3.5

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54 Fault events list

Praesideo 3.5 Installation and User Instructions 10 Events

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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.

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.

Bosch Security Systems 2011-02

Page 419
Image 419
Bosch Appliances 3.5 Fault events list, Fault events in alphabetical order, Amplifier failure, Amplifier ground short