2021
AFCI self-check failure
Huawei · SUN2000 Solar Inverter
What does 2021 mean?
The Arc-Fault Circuit Interrupter (AFCI) self-check function within the solar inverter has failed. This indicates a potential issue with the arc detection capabilities of the device, which are critical for safety in PV systems.
Common Causes
- The AFCI self-check fails.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Turn off the AC output switch and DC input switch.
- 2
Turn on the AC output switch and DC input switch after 5 minutes.
Verified technical data. Last updated: March 2026
Related Faults
Source: Huawei SUN2000 Solar Inverter