Learn how to troubleshoot a blank screen and unlit LEDs on a Fronius Primo inverter.
Check the power supply and ensure the inverter is properly connected to the grid. If the issue persists, consult the user manual for further troubleshooting steps.
To reset your Fronius Primo inverter, turn off the inverter and disconnect it from the power source. Wait for a few minutes before reconnecting and turning it back on.
A blank screen and no LEDs lit typically indicate that the inverter is not receiving AC voltage from the Utility Grid or that there is an internal fault. Inverters are designed to operate within specific parameters, and if they detect conditions outside these limits—such as a loss of grid voltage, ground faults, or internal component failures—they will shut down to prevent damage. The inverter continuously monitors insulation resistance (RISO) and grid frequency, and if these parameters are not met, it will trigger a safety lockout.
The Fronius Primo inverter displays a completely blank screen with no LED indicators lit. This results in no power production, and monitoring applications may report a communication error or no data received.
Always consult a licensed electrician or certified solar installer for troubleshooting and repairs to ensure compliance with local codes and safety standards.
To prevent this issue from occurring in the future, ensure regular maintenance of the solar system, including visual inspections of all wiring, connectors, and junction boxes. Schedule periodic performance checks and insulation resistance tests to identify potential problems before they lead to inverter shutdowns. Additionally, ensure that the inverter firmware is up to date, as manufacturers often release updates to improve performance and reliability.