Fronius Symo Hybrid Inverter Code 515 — Unable to communicate with filter

What does 515 mean?

A warning message on the display indicates that the inverter is unable to communicate with its internal or external filter unit. This can impact system performance or safety functions.

• Communication cable fault to filter
• Filter unit malfunction
• Internal communication bus error

Click steps to track your progress.

1. 1

   Acknowledge the status code on the display.

2. 2

   Perform a full AC and DC power cycle of the inverter: Disconnect both AC and DC power, wait 5 minutes, then reconnect.

3. 3

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