Analysis: Inverter internal BUS voltage over range
Solution: 
1. Check if the inverter’s DC side connection is correct, check if the DC voltage is in rated range
2. Restart inverter(disconnect DC&AC switch, wait for 5 mins, then turn it on), observe if it can return to normal running.
3. Check if the AC “N” and “PE” cable be connected well , and complied with the standard requirements