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ErrorLib — Industrial Fault Code Library

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2001

High String Input Voltage

Huawei · SUN2000 Solar Inverter

What does 2001 mean?

The open-circuit voltage of the PV array exceeds the maximum input voltage limit of the SUN2000 due to an excessive number of PV modules connected in series. This indicates a potential overvoltage condition for the inverter's DC input.

Common Causes

  • Excessive PV modules are connected in series in the PV array. Therefore, the open-circuit voltage exceeds the maximum input voltage of the SUN2000.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the number of PV modules connected in series in the PV string.

  2. 2

    Ensure that the PV string open-circuit voltage is no greater than the maximum operating voltage of the SUN2000.

Browse all codes in this manual (33)
Verified technical data. Last updated: April 2026

Related Faults

2002DC Arc Fault2003DC arc fault2011String Reversed
Source: Huawei SUN2000 Solar Inverter
Open Manual (Page 67)Search more codes in this manual