Learn about Sungrow Error Code 320, its causes, and how to fix it effectively.
Error Code 320 indicates a leakage current CT self-check fault in the inverter. This can affect the inverter's performance and safety.
To troubleshoot Error Code 320, check the wiring and connections for any damage. Ensure that the current transformer is functioning properly.
The Sungrow Error 320 is triggered during the leakage current self-check process, which is designed to ensure the safety and integrity of the inverter and connected solar array. When the inverter performs an insulation resistance (RISO) measurement, it checks for any leakage current that could indicate insulation failure or ground faults. If the measured insulation resistance falls below a predetermined threshold, the inverter interprets this as a potential safety hazard, leading to a fault condition to prevent electric shock or fire risks. Ground fault detection mechanisms are also in place to identify any unintended current paths to the ground, which can occur due to damaged wiring or environmental factors.
Upon encountering the Sungrow Error 320, users may observe the inverter's LED indicators flashing in a specific pattern, typically indicating a fault condition. Additionally, the monitoring app may display alerts regarding a self-check failure, and users may notice a significant drop in energy production, as the inverter may shut down to protect itself from potential damage.
Always ensure that any troubleshooting or repairs are conducted by a licensed electrician or certified solar installer to maintain safety and compliance with local electrical codes.
To prevent recurrence of the Error 320, ensure regular maintenance checks are performed on the inverter and associated components. This includes routine inspections for moisture ingress, ensuring all connections are tight and free of corrosion, and verifying that the system complies with NEC standards. Additionally, consider installing surge protection devices to mitigate the risk of damage from electrical surges.