Learn about Solis Error Code 1039, its meaning, causes, and solutions for low isolation resistance.
Error Code 1039 indicates that the isolation resistance is too low, which can affect system safety and performance.
You can check isolation resistance using a multimeter or insulation resistance tester to ensure it meets manufacturer specifications.
The Solis inverter triggers Error 1039 when it detects that the insulation resistance (RISO) is below acceptable levels. This measurement is critical for the safe operation of the inverter, as it indicates the integrity of the electrical insulation between the live conductors and ground. A low RISO measurement suggests that there may be a ground fault or leakage current, which poses risks of electrical shock or fire. The inverter's internal ground fault detection mechanism monitors this resistance continuously and will initiate a shutdown if it falls below the manufacturer's specified threshold.
Upon encountering Error 1039 on a Solis inverter, users may observe the inverter's LED indicator flashing in a specific pattern, often accompanied by alerts on the monitoring app indicating a fault condition. Additionally, there may be a noticeable drop in power production, as the inverter will automatically shut down or limit output to prevent damage.
Always ensure that work on the solar array and inverter is performed by a licensed electrician or certified solar installer to comply with safety standards and local electrical codes.
To prevent the recurrence of Error 1039, conduct regular inspections of the PV array, wiring, and junction boxes to identify any signs of wear, damage, or moisture ingress. Implement proper system techniques, including sealing connections and protecting cables from UV exposure and physical damage. Additionally, schedule routine maintenance checks to verify insulation resistance and overall system performance.