Rolling shutter motor no load can not start the reasons:
1, fuse blown.
2, three-phase power cord or stator winding has a power outage.
3, knife switch or start the device poor contact.
4, stator three-phase winding end of the wrong end.
5, stator winding short circuit.
6, the shaft bending.
7, bearing serious damage.
8, stator core loose.
9, shutter doors motor cover or bearing cover assembly properly.