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. 1

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

Browse all codes in this manual (60)
Verified technical data. Last updated: March 2026

Related Faults

Source: Fronius Symo Advanced Manual