Learn about Fronius Error Code 106, its causes, and solutions for low mains frequency grid faults.
Error Code 106 indicates that the mains frequency is too low, which can affect inverter performance. This fault may arise due to grid issues or equipment malfunctions.
To troubleshoot Error Code 106, check the grid frequency with your utility provider. Ensure that your inverter settings are correct and that there are no external factors affecting the grid.
The Fronius inverter monitors the grid frequency to ensure safe and efficient operation. A fault 106 indicates that the inverter has detected a frequency below the acceptable threshold, which typically ranges from 47 Hz to 53 Hz for a 60 Hz grid. This trigger can occur due to the inverter's internal frequency monitoring circuitry detecting conditions outside these limits, which can compromise system safety and performance. The inverter is designed to disconnect from the grid to prevent damage to both itself and the connected solar array when such conditions are present.
When the Fronius inverter triggers error 106, users may observe a red LED indicator on the inverter, accompanied by alerts in the monitoring app indicating a grid fault related to low mains frequency. Additionally, solar production may drop significantly, leading to unexpected energy shortfalls.
Always consult a licensed electrician or certified solar installer when diagnosing or resolving inverter issues to ensure compliance with safety regulations and proper handling of electrical components.
To prevent recurrence of error 106, ensure regular maintenance checks on the inverter and associated electrical components. Monitor grid frequency trends through the inverter's app, and maintain open communication with your utility provider regarding any grid performance issues. Additionally, consider installing surge protection devices to safeguard against external disturbances.