No communication possible with the power stage set

Was bedeutet 401 ?

Communication has been lost between the inverter's control system and its power stage module(s). The inverter will automatically attempt to re-establish the connection and, if successful, resume feeding energy into the grid.

• Internal communication bus error or interruption
• Faulty connection between control and power stage boards
• Malfunction in either the control or power stage module

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   If this status code is displayed all the time, notify a Fronius-trained service engineer.