SMA Manual Recommendation
| Error No. | Explanation | Corrective measures |
| 3501 | The insulation monitoring device has measured an inadequate grounding resistance. With the options "GFDI and insulation monitoring device" and "Remote GFDI and insulation monitoring device", the insulation monitoring device is only active when the GFDI or the remote GFDI is open | • Check the PV array for ground faults. |
Fault Description - The insulation monitor has detected an insulation fault. This fault can be inductive to a ground fault or insulation wiring error.
Troubleshooting Actions - Monitor the array and check for insulation errors that may cause additional ground faults.