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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.

2037

Grid Underfrequency

Huawei · SUN2000 Solar Inverter

What does 2037 mean?

The actual power grid frequency is lower than the standard requirement for the local power grid. This condition indicates an unstable grid frequency, which can cause the inverter to disconnect for protection.

Common Causes

  • Power grid exception: The actual power grid frequency is lower than the standard requirement for the local power grid.
  • The power grid may be abnormal temporarily.
  • The grid underfrequency protection threshold is set incorrectly.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check whether the grid frequency is within the acceptable range.

  2. 2

    Log in to the mobile phone app, SmartLogger, or NMS to modify the grid underfrequency protection threshold with the consent of the local power operator.

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

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2001High String Input Voltage2002DC Arc Fault2003DC arc fault
Source: Huawei SUN2000 Solar Inverter
Open Manual (Page 69)Search more codes in this manual