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ErrorLib — Industrial Fault Code Library

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2003

DC arc fault

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

What does 2003 mean?

Arcing or poor contact exists in the PV string power cables for PV1 (Cause ID 1) or PV2 (Cause ID 2). This indicates an electrical safety hazard.

Common Causes

  • The PV string power cables arc or are in poor contact (PV1).
  • The PV string power cables arc or are in poor contact (PV2).

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check whether the PV string cables arc or are in poor contact.

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

Related Faults

2001High string input voltage2002DC arc fault2011String reverse connection
Source: Huawei SUN2000-(3KTL-10KTL)-M1 Solar Inverter
Open Manual (Page 94)Search more codes in this manual