Reference voltage source for the digital signal processor (DSP) is working out of tolerance

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The internal voltage reference used by the Digital Signal Processor (DSP) is unstable or outside its specified operating range. This can lead to inaccurate measurements, unstable control, and overall system malfunction.

• Faulty internal voltage regulator
• Component aging affecting reference voltage stability

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