Check the "Inflatable Air Blower" shook his head, whether it is consistent with the panel marked speed and time switches. If the key switch, when you press a key should not be linked with two key phenomena; each key is pressed, the reset must be flexible. There shake the device depends on the "Inflatable Air Blower" fan head swing angle; shaking his head angle bigger, the better the effect of wind fan. Yang, depression adjust lightweight, reliable locking mechanism. Maximum elevation, pushing the appropriate body to hit the fan should not tip over backwards. Maximum angle of depression, nets should not collide with the column. Watch the axial gap motor around, as long as "Inflatable Air Blower" flexible rotor, the smaller the gap, the better. Check before you remove the fan grille, prominent part of the hand holding the blade in the middle, sliding a few times, the gap is less than 1