Cause: Overspeed comes when the motor rotates in an excessive speed. This is a protective fault to prevent mechanical damage or unsafe conditions if the motor runs faster than expected.

0s fault in fuji FRENIC MEGA drive indicates Overspeed condition. This means the motor speed has exceeded the overspeed detection limit set in the drive.

• Check the maximum frequency setting.
• Check the setting of speed limit function.
• Check whether the actual speed overshoots the commanded one in higher speed operation.
• Check whether appropriate noise control measures have been implemented.