Enphase micro LED flashing red. Grid problem?

The short answer

Yes: grid absent or out of spec. Check AC breakers and utility voltage, then measure.

Plain explanation

From the Enphase manual for the IQ8 microinverter: Check AC breakers closed. Utility voltage in range. 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 AC breakers closed
Utility voltage in range
Installer measures
Enphase support

Source

Enphase IQ8 Series Installation & Operation Manual IOM-00068-3.0, §5, §5 p26-28enphase.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.