Communication error between the processors

What does 452 mean?

This code indicates a communication error between the inverter's internal processors. This is a critical internal fault that prevents the control system from functioning correctly and will halt energy feeding.

• Faulty internal communication bus or interface between processors.
• Malfunction of one or more internal processors.
• Electromagnetic interference affecting sensitive communication lines.

Click steps to track your progress.

1. 1

   If the status code is displayed continuously, notify a Fronius-trained service engineer for internal diagnosis and repair.

2. 2

   Perform an AC reset by cycling the automatic circuit breaker to attempt to re-establish inter-processor communication.

3. 3

   Check for stable power supplies to all internal processors.