1. After the electric actuator receives the switch signal from the control system, the motor does not rotate and there is a humming sound. The reasons may be:
1) The planetary gear part of the electric actuator reducer is jammed, damaged or deformed;
2) The helical gear transmission part of the electric actuator reducer is deformed or excessively worn or damaged;
3) Deformation and damage, jamming, etc. of the turbine worm or screw nut transmission part of the electric actuator reducer;
4) The overall mechanical part of the electric actuator is not well coordinated and inflexible, and needs to be adjusted and refueled.
