SMA Manual Recommendation
| Error No. | Explanation | Corrective measures |
| 3501 | The insulation monitoring device has measured an excessively low grounding resistance. For 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. . |
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