Output DC Component Overhigh

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The DC component of the SUN2000 output current exceeds the specified upper threshold. An excessive DC component can cause transformer saturation in the grid and affect other grid-tied equipment.

• The DC component of the SUN2000 output current exceeds the specified upper threshold.

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1. 1

   Verify grid voltage and frequency at the inverter's AC output terminals are stable and within specified operating limits.

2. 2

   Check inverter grid-tie parameters and local grid code settings, especially those related to DC injection limits, to ensure proper configuration.

3. 3

   Inspect all AC output cabling and grounding connections from the inverter to the grid for secure termination, absence of corrosion, and physical integrity.

4. 4

   Monitor the inverter's diagnostic logs and real-time output current data for any other correlating error messages or abnormal waveform characteristics.