Reverse currents detected in the PV array or DC connection polarity reversed

What does 4003 mean?

Reverse currents have been detected in the PV array, or the DC connection polarity is reversed. This is a critical fault that can damage the inverter and PV modules. The inverter will shut down for 30 seconds and wait for acknowledgement.

• Short circuits within PV modules.
• Incorrect module wiring or system design.
• Reversed polarity of DC terminals during connection.
• Malfunction of a PV string.

Click steps to track your progress.

1. 1

   Check individual PV modules for short circuits.

2. 2

   Verify the module wiring and overall system design for correctness.

3. 3

   Inspect the DC terminals for correct polarity.

4. 4

   Check the functionality of the entire PV string for anomalies.