Analysis: Inverter lost the connection with grid
1. Check if AC terminal and distribution box internal connection is correct, check if any connector is loose or disconnected. Check if the breaker was tripped in distribution box.
2. Use a multimeter to check if the connection with grid is correct ; and check if grid voltage and frequency is in the rated range
3. Check if the inverter’s safety code be set correctly and Grid protection value be set to match actual situation.
4. Please Wait for a while until the grid recovered, then check if the inverter can return to work