Learn about Fronius Error Code 104, its causes, and solutions for mains frequency issues.
Error Code 104 indicates that the mains frequency is outside the acceptable limits. This can affect the inverter's performance and connection to the grid.
To troubleshoot Error Code 104, check the grid frequency with your utility provider. Ensure that your inverter settings are correctly configured for your region.
The Fronius inverter is designed to monitor and maintain the grid frequency within specified limits to ensure safe operation. When the inverter detects that the mains frequency is outside the permissible range, it triggers fault 104. This is a protective measure to prevent potential damage to the inverter and connected systems. The inverter utilizes internal sensors to measure the grid frequency, and if these readings fall outside the range of 59.3 Hz to 60.5 Hz, the inverter will cease operation to protect itself and the solar array. This can occur due to fluctuations in the utility grid, grounding issues, or faulty monitoring components.
Homeowners may observe that the Fronius inverter displays a fault 104 on its LED interface. This may be accompanied by a significant drop in energy production as indicated on the monitoring app. The inverter may also show a blinking red LED, signaling an operational issue. Additionally, the system may not respond to commands from the monitoring app, indicating a communication breakdown due to the fault.
Always consult a licensed electrician or certified solar installer when troubleshooting electrical issues. Working with high-voltage systems can be dangerous and should only be performed by qualified licensed technicians.
To prevent future occurrences of this issue, regularly maintain the inverter and ensure that all grounding and electrical connections are secure. Schedule periodic inspections to verify that the utility grid frequency remains stable. Additionally, keep the inverter's firmware updated to benefit from the latest enhancements.