SMA · Sunny Boy Inverters
The inverter's internal insulation measurement process has failed to complete successfully. This may indicate an issue with the measurement system itself or an underlying insulation problem in the PV array.
Click steps to track your progress.
If this problem recurs, contact your installer for a diagnostic check.
If the issue persists, contact the SMA Serviceline for further assistance.
Ensure all connections are secure and there is no visible damage to the PV system wiring or inverter.