The short answer
Occasional trips self-recover; if frequent, log grid voltage, contact the grid operator and check AC switch and cables.
Plain explanation
From the Huawei manual for the SUN2000 inverter: Occasional trips recover automatically. If frequent, log grid voltage and contact the grid operator. The rest of the checklist is below; work through it in order. Installer only: DC and AC work on a live PV system is dangerous, so owners should note the code and call their installer. Grid limits depend on your country, so check your national code and grid operator rules.
Steps from the source
- Occasional trips recover automatically
- If frequent, log grid voltage and contact the grid operator
- Thresholds only changed with grid-operator consent (installer)
- Installer checks AC switch and cables
Source
Huawei Inverter Alarm Reference, Issue 09 (2024-11-01), EDOC1100345192, Alarm 2033, §20, p24files.keno-energy.com ↗
Where installers ask this
- brand new Huawei inverter not working (r/solar)
- reddit.com/r/solar/comments/1gu8nvu/
- reddit.com/r/SolarDIY/comments/1kajaqx/
General guidance based on the manufacturer's manual or the named source. Always follow the current manual for your exact model and your national code. DC and AC electrical work is for qualified installers only. Not affiliated with or endorsed by any brand named; trademarks belong to their owners.