Learn about Solis Error Code UN-G-F02, its meaning, causes, and solutions for underfrequency issues.
Error Code UN-G-F02 indicates an underfrequency condition during grid instability events, affecting inverter performance.
To resolve underfrequency issues, check grid stability and ensure proper inverter settings are configured.
The Solis inverter is designed to operate within specific grid frequency limits, typically around 60 Hz in the U.S. When the grid frequency drops below the acceptable threshold, the inverter triggers the UN-G-F02 fault code to protect both itself and the connected solar array from potential damage. This fault is a safety feature that prevents the inverter from operating under conditions that could lead to overheating or electrical instability. The inverter continuously monitors the grid frequency and may utilize RISO (insulation resistance) measurements to ensure safe operation. If the grid frequency is deemed unstable, the inverter will disconnect from the grid until normal conditions are restored.
Users may observe an LED indicator on the Solis inverter displaying a fault code UN-G-F02, which typically corresponds to an underfrequency condition. Additionally, monitoring apps may show a drop in energy production or indicate that the inverter has entered a protective shutdown state. Users may also notice fluctuations in household power supply or appliances behaving erratically during grid instability events.
Always consult with a licensed electrician or certified solar installer when troubleshooting electrical issues to ensure safety and compliance with applicable codes.
To avoid future occurrences of the UN-G-F02 fault, ensure regular maintenance of the inverter and its components. Schedule periodic inspections of the grounding system and electrical connections, and keep the inverter firmware updated. Additionally, monitor local grid conditions and consider installing surge protection devices to safeguard the system from electrical anomalies.