Some ATV900 drives are built without an internal braking transistor or external braking module
If a braking module is not connected, the drive may show "DB unit sh. circuit" by default.

It is necessary to disable this function on those ATV930 series drives that do not have a braking module connected.

Navigate from the main menu to [ Complete settings] - [Error/Warning handling] - [Braking Resistor monit] and change Braking Resistor monit parameter to Ignore.

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