How to solve Err07 in the inverter?

Err07 means overvoltage at constant speed. Please follow the step below to check:
1.Measure the input voltage, too high input voltage will cause error07.

2.Ensure that there is no external force driving when the motor is running at a constant speed， or install the braking unit and braking resistor.

3.Set F0.20 = 1 to restore to factory default setting.