416
No communication possible between power stage set and control system
Fronius · Symo Advanced Manual
What does 416 mean?
Communication has been lost between the inverter's power conversion stage and its central control system. The inverter will automatically attempt to re-establish the connection and, if successful, resume feeding energy into the grid.
Common Causes
- Internal communication bus error or interruption
- Faulty connection between control and power stage boards
- Malfunction in either the control or power stage module
Repair Steps & Checklist
Click steps to track your progress.
- 1
If this status code is displayed all the time, notify a Fronius-trained service engineer.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Symo Advanced Manual