The side brush rotates slowly or does not rotate during operation?

(1) When the robot is in low power, it will automatically turn to "return to charging" mode, in "return to charging" mode, the side brush rotates slowly, after the robot is fully charged on the base station, it can work normally, and the side brush rotates normally;
(2) There is a foreign matter on the side brush, so it can't run, just clean up the foreign matter;
(3) The side brush is not installed in place, remove the side brush reinstallation can be;
(4) side brush fixed screw plastic parts have rupture or screws have been loosened, replace the side brush can be.