Problem Description：Peculiar smell / smoky
Reason Analysis：
1）Check The fan edge of the motor is not worn
2）The small belt is skewed causing sharp heterodyne sound
3）Motor wind blade broken
Solutions：
1）There are two lock screw holes below the motor cover . first of all, the left screw counterclockwise rotation to loosen the screw, and then the right screw clockwise locking screw, so that the motor body and the spacing between the running belt 10mm or so, and then clockwise locking the left screw，Note: When locking, the main body of the motor needs to be level with the running belt, not skewed, otherwise it will affect the life of the small belt or produce a strange sound. Then install the motor cover, starting the treadmill again to confirm whether there is an abnormal sound of friction.
2）Open the motor cover and make sure the small belt is parallel to the motor pulley. If it is not parallel, turn the motor pulley by hand and adjust the small belt to parallel position.
3）Replace the motor air blade.