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ErrorLib — Industrial Fault Code Library

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2011

String reverse connection

Huawei · SUN2000-(3KTL-10KTL)-M1 Solar Inverter

What does 2011 mean?

The polarity of the PV string is reversed (PV1 for Cause ID 1, PV2 for Cause ID 2). This prevents proper power generation and can potentially damage the inverter.

Common Causes

  • The PV string polarity is reversed (PV1).
  • The PV string polarity is reversed (PV2).

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check whether the PV string is reversely connected to the SUN2000. If so, wait until the PV string current decreases to below 0.5 A, then turn off the DC switch and correct the PV string polarity.

Browse all codes in this manual (24)
Verified technical data. Last updated: April 2026

Related Faults

2001High string input voltage2002DC arc fault2003DC arc fault
Source: Huawei SUN2000-(3KTL-10KTL)-M1 Solar Inverter
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