Plain explanation
From the Fronius manual for the Primo/Symo SnapINverter: Check the inverter AC breaker in the distribution board is ON. Check for a power cut in the area (temporary outage clears itself). 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
- Check the inverter AC breaker in the distribution board is ON
- Check for a power cut in the area (temporary outage clears itself)
- If permanent → installer checks the AC connection
Source
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.