Cause: Fuse blown comes when the fuse inside the inverter blew. This means that one or more of the internal fuses within the VFD's power circuit have opened.

fus fault in fuji FRENIC MEGA drive indicates a Fuse Blown Fault within the inverter. This means one or more of the internal power circuit fuses in the drive have blown.

• Check whether there has been any excess surge or noise coming from outside.
• Take measures against surges and noise.
• Remove the front cover and locate the blown fuse(s) if accessible.
• Look for burn marks, damaged components, or melted insulation.