CAN transmit buffer is full

What does 485 mean?

The CAN (Controller Area Network) bus transmit buffer is full, indicating excessive data traffic or a communication error. This prevents the inverter from feeding energy into the grid due to communication breakdown.

• Excessive data on the CAN bus
• Internal CAN bus communication fault
• Malfunction of a connected CAN device

Click steps to track your progress.

1. 1

   Perform an AC reset (switch the automatic circuit breaker off and on again).

2. 2

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