EL
ErrorLib
Brands
||
  1. Home
  2. SMA
  3. SUNNY CENTRAL 500CP XT / 630CP XT Solar Inverter
  4. 3511
About·Privacy·Terms

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.

3511

Inverter detected insulation error

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

What does 3511 mean?

The inverter has detected a general insulation error. This indicates a potential safety risk due to compromised insulation.

Common Causes

  • Ground fault in the PV array.
  • Degraded insulation in PV modules or wiring.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the PV array for ground faults using an insulation resistance tester.

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
Open Manual (Page 36)Search more codes in this manual