Internal fault (e.g. arc fault detection)

What does 716 mean?

The Fronius Primo GEN24 208-240 inverter has detected an internal fault within its arc fault detection (AFCI) or Arc Guard circuit. This system is essential for detecting dangerous electrical arcs in the PV array and shutting down for safety. A fault means this protection is compromised.

• Internal fault (e.g. arc fault detection).
• Faulty AFCI sensor or circuit.

Click steps to track your progress.

1. 1

   Perform a full power cycle of the Fronius Primo GEN24 208-240 inverter by disconnecting both AC and DC power, waiting several minutes, and then reapplying power.

2. 2

   Ensure that all DC connections in the PV array, including module connectors and string combiner box terminals, are secure and free from potential arcing points.

3. 3

   Check the inverter's event log for any preceding or related arc fault events (if a specific AFCI trip code exists).

4. 4

   Verify that the AFCI function is not being erroneously triggered by external electromagnetic interference; relocate any nearby problematic devices if suspected.

5. 5

   If the fault persists, this indicates a failure in the internal arc fault detection hardware; contact Fronius service for specialized diagnostics and repair.