Err30 fault in Emotron VS Series Drive indicates Instantaneous overvoltage. This means a sudden, extreme spike in the internal DC bus voltage was detected, exceeding the maximum safe limit.

Possible Causes:

1: Input voltage is too high;
2: There is external force drag the motor to run in deceleration process;
3: The deceleration time is too short;
4: No installation of braking resistor.

Solutions:

1: Adjust the voltage to normal range;
2: Cancel external force or install brake resistor;
3: To increase the deceleration time;
4: Install braking resistor.