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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

3515

Ground fault detected by Soft Grounding has been ignored

SMA · SUNNY CENTRAL 500CP XT / 630CP XT Solar Inverter

What does 3515 mean?

A ground fault was detected by the Soft Grounding feature but has been ignored, possibly due to system configuration. While ignored, it still indicates a potential issue.

Common Causes

  • Ground fault in the PV array.
  • Soft Grounding configured to ignore certain ground faults.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the PV array for ground faults.

  2. 2

    Review the configuration of the Soft Grounding parameter to understand why the fault was ignored.

Browse all codes in this manual (29)
Verified technical data. Last updated: April 2026

Related Faults

0103*Grid voltage is too high (redundant monitoring)0104*Grid voltage is too high (standard monitoring)0203*Grid voltage is too low (redundant monitoring)
Source: SMA SUNNY CENTRAL 500CP XT / 630CP XT Solar Inverter
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