Learn how to troubleshoot and fix the isolation fault in Aero-Sharp inverters with flashing red lights.
A flashing red light typically indicates an isolation fault, which may require immediate attention to ensure safety and functionality.
To reset your Aero-Sharp inverter, turn off the power supply, wait for a few minutes, and then turn it back on.
The isolation fault is triggered when the inverter detects an abnormality in insulation resistance (RISO) between the DC circuit and the ground. This may occur due to moisture ingress, damaged wiring, or a ground fault. The inverter continuously monitors the insulation resistance to ensure safety and compliance with NEC standards. If the resistance falls below a predetermined threshold, the inverter will enter a fault state to prevent potential electric shock or fire hazards.
Homeowners will notice a red light flashing on the Aero-Sharp inverter, indicating an isolation fault. Monitoring apps may display alerts, and there may be a noticeable drop in energy production, often with the inverter showing a fault code related to isolation issues.
Always consult a licensed electrician or certified solar installer when diagnosing and repairing electrical faults to ensure safety and compliance with local codes.
To avoid isolation faults in the future, conduct regular inspections of the solar array and inverter, ensuring all connections are tight and free from corrosion. Implement routine insulation resistance testing and keep the inverter's firmware updated to mitigate internal faults. Additionally, ensure the system complies with NEC guidelines to prevent grounding issues.