2021
AFCI self-check failure
Huawei · SUN2000-(3KTL-10KTL)-M1 Solar Inverter
What does 2021 mean?
The Arc Fault Circuit Interrupter (AFCI) self-check function fails. This indicates a potential malfunction of a critical safety feature designed to detect and mitigate electrical arcs.
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, then turn them on after 5 minutes.
Verified technical data. Last updated: March 2026
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Source: Huawei SUN2000-(3KTL-10KTL)-M1 Solar Inverter