Internal fault (e.g. startup)
Fronius · Primo GEN24
What does 719 mean?
The Fronius Primo GEN24 208-240 inverter has detected an internal fault during its startup sequence. This means the inverter is unable to complete its initialization process and begin normal operation.
Common Causes
- Internal fault (e.g. startup).
Repair Steps & Checklist
Click steps to track your progress.
- 1
Perform a complete power cycle of the Fronius Primo GEN24 208-240 inverter: Open the AC circuit breaker, then the DC disconnector, wait for at least 5 minutes, and then reclose them in reverse order (DC first, then AC).
- 2
Ensure that both AC grid voltage and DC PV voltage are stable and within their specified operating ranges upon inverter startup.
- 3
Check for any external communication cables (e.g., Smart Meter, battery) that might be miswired or causing conflicts during startup; temporarily disconnect non-essential comms if possible.
- 4
Review the inverter's event log for any other transient errors that might have occurred just before or during the startup failure.
- 5
If the fault persists after multiple power cycles and external checks, this indicates a serious internal hardware or software issue preventing startup; contact Fronius service.