Bosch Appliances 3.5 en, Amplifier missing, Amplifier initialization failure, Amplifier overheat

Praesideo 3.5 Installation and User Instructions 10 Events

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Event message:

Amplifier missing

Originator:

Amplifier channel of a basic amplifier in which the fault occurred.

Extra information:

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Description:

Logs the absence of an amplifier channel (based on missing battery and mains power supply).

Resolve:

When the fault disappears or when the unit disconnects.

Recommended action:

Check whether both CAT-5 cables between the multi channel interface and the basic amplifier channel are correctly connected.

Event message:

Amplifier initialization failure

Originator:

Power amplifier channel in which the fault occurred. Extra information:

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Description:

Logs the inability of a power amplifier to return from the standby mode.

Resolve:

When the fault disappears or when the power amplifier disconnects.

Recommended action:

Switch the power amplifier off and on again.

Event message:

Amplifier overheat

Originator:

Amplifier channel in which the fault occurred. Extra information:

This fault event cannot be generated by LBB4428/xx Power Amplifiers.

Description:

Logs the overheat (> 85 °C) of an amplifier channel. The system decreases the audio level with 3 dB. This fault event can occur even when the power amplifier is disabled with the configuration software.

Resolve:

When the fault disappears or when the power amplifier disconnects. If this fault is acknowledged/reset, any Redundant Supply 24V in the same amplifier channel will also be acknowledged/reset.

Recommended action:

Check if the fans of the power amplifier operate correctly. Also check the ambient temperature of the rack. If necessary, use forced cooling.

Event message:

Amplifier overheat: (amplifier channel) muted Originator:

Amplifier channel in which the fault occurred. Extra information:

This fault event cannot be generated by LBB4428/xx Power Amplifiers.

Description:

Logs the overheat (> 90 °C) of an amplifier channel. The system mutes all amplifier channels in the power amplifier. This fault can occur even when the power amplifier is disabled with the configuration software. Resolve:

When the power amplifier disconnects or when the fault is resolved automatically.

Recommended action:

Check if the fans of the power amplifier operate correctly. Also check the ambient temperature of the rack. If necessary, use forced cooling.

Bosch Security Systems 2011-02