Learn about SolarEdge Error Code 18x7A, its causes, and how to resolve fan issues.
Error Code 18x7A indicates that fan 2 is blocked or has failed, affecting inverter performance.
Inspect the fan area for obstructions and ensure it spins freely when powered on.
The SolarEdge inverter triggers Error 18x7A when it detects that fan 2 is blocked or has failed. This can occur due to insufficient airflow, which is essential for maintaining optimal operating temperatures within the inverter. The inverter employs thermal management systems, including fans, to regulate internal temperatures and prevent overheating. If fan 2 is inoperative, the inverter’s internal temperature can exceed safe limits, leading to protective shutdowns and error codes. The inverter continuously monitors its thermal conditions and will trigger a fault if it cannot maintain a safe operating environment.
Upon encountering Error Code 18x7A, the user may observe the inverter's LED indicator flashing a specific pattern indicating a fault. In addition, the monitoring app may display alerts regarding reduced production levels or a complete halt in output. Users might notice that the inverter is not responding to commands or showing reduced efficiency.
Always ensure that any troubleshooting or maintenance work is carried out by a licensed electrician or certified solar installer to adhere to safety standards and regulations.
To prevent future occurrences of Error 18x7A, regularly inspect and clean the inverter's cooling fans and ensure that the system site allows for adequate airflow. Monitor ambient temperatures and avoid placing the inverter in enclosed spaces where heat can accumulate. Consider scheduling periodic maintenance checks with a certified solar installer to ensure all components are functioning optimally.