Learn about the Fronius Riso error code, its meaning, causes, and solutions for troubleshooting.
The Riso error code indicates an isolation fault in the inverter, which can affect performance. It is essential to check the insulation resistance to ensure safety and functionality.
To resolve the Riso error, inspect the wiring and connections for any damage or wear. If necessary, consult a qualified technician to perform a thorough check of the system.
The Riso error code is triggered when the inverter detects a low insulation resistance value, which is crucial for the safety and performance of the solar system. The inverter continuously monitors the insulation resistance between the DC circuit (solar array) and ground. If this resistance falls below a predefined threshold, it could indicate that current is leaking to ground, posing a risk of electric shock or fire. The inverter's isolation monitoring unit evaluates this resistance and, upon detecting a failure, shuts down the system to prevent further issues.
Upon encountering the Riso fault code on a Fronius Symo State 112 inverter, users typically observe a flashing red LED indicator on the inverter display. The monitoring app may also show a production drop or an alert indicating an isolation fault. This fault signifies that the inverter's insulation resistance measurement has fallen below acceptable levels, indicating a potential ground fault or insulation failure in the system.
Always ensure that a licensed electrician or certified solar installer performs any troubleshooting or repairs on the solar system to maintain safety and compliance with local electrical codes.
To avoid encountering the Riso fault in the future, ensure regular maintenance checks are performed on the solar array and inverter system. This includes inspecting wiring for wear and tear, ensuring proper sealing of junction boxes, and verifying that grounding connections remain secure. Additionally, consider implementing moisture barriers where necessary and regularly cleaning the array to prevent debris accumulation that could lead to insulation issues.