The Configuration Interface will indicate the reason for self-test failure. Follow the appropriate troubleshooting steps below and reset the inverter (via Configuration Interface or AC power cycle) to trigger a new self-test.

Inverter Ground Fault Self-Test Failed

Check DC wiring, connections, panels, and rapid shutdown devices for ground fault detection issues.

MCI Self-Test Failed - MPPT 1, MPPT 2, MPPT 3, or MPPT 4

Check DC wiring and MCIs, focusing on the MPPT indicated. Ensure all MCIs are properly connected.

DC Isolation Self-Test Failed, or DC Isolation Issue - MPPT 1, MPPT2, MPPT3, or MPPT 4

Check DC wiring, connections, panels, and system grounding for isolation issues, focusing on the MPPT indicated. Ensure all MCIs are properly connected.

Inverter Relay Self-Test Failed

Check AC wiring and grid connection. Check grounding.

AC Grounding Self-Test Failed

Check AC system grounding. The AC PE conductor should be terminated in the inverter grounding.