Electrical Grounding Fault

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A major fault indicating that the neutral wire or PGND cable is not connected to the SUN2000, or an isolation transformer is missing at the output side when PV strings are grounded. This prevents proper electrical grounding of the inverter, posing a safety risk and operational instability.

• The neutral wire or PGND cable is not connected to the SUN2000.
• An isolation transformer is not connected to the SUN2000 at the output side when the PV strings are grounded.

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1. 1

   Verify that the neutral wire and PGND cable are properly connected to the SUN2000.

2. 2

   Confirm that an isolation transformer is connected to the SUN2000 at the output side if the PV strings are grounded.