The short answer
Use Maintenance > Optimizer layout in the app, note position and serial, and get the optimizer replaced.
Plain explanation
From the Huawei manual for the SUN2000 + optimizers: In the app go to Maintenance > Optimizer layout. Find the optimizer marked as malfunctioning. The rest of the checklist is below; work through it in order. This is a warranty/support case: note the code, time and serial number before calling the manufacturer.
Steps from the source
- In the app go to Maintenance > Optimizer layout
- Find the optimizer marked as malfunctioning
- Note its position and serial
- Vendor/installer replaces the optimizer
Source
Huawei Inverter Alarm Reference, Issue 09 (2024-11-01), EDOC1100345192, Alarm 2081, §45, p57files.keno-energy.com ↗
Where installers ask this
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.