There are two kinds of switch on the ceiling fan, one is inductance and the other is capacitance. Both of them can achieve the speed of speed by selecting the size of the inductor and the capacitance of the access circuit. The ceiling fan reduces the current by adjusting the voltage and controls the speed. The transfer position changes the voltage and current of the supply circuit to change the speed of the motor and changes the speed of the fan. The governor of the coil silicon chip is an inductor, which is equivalent to the resistance in the AC circuit, and divides the partial voltage and current. The new governor is bidirectional thyristor, chopping the wave, and almost no power consumption. The relatively simple way to test the switch is to directly dismantle the direct power supply of the governor control line. The direct power supply is not through the governor to adjust the rotation degree is the fast gear. If the speed is raised, then the governor damage and replacement of the new, then the opposite is no problem.
Because of the bearing, the ceiling fan needs refueling, which can be added once a year or two years. When refueling, remove the fan out of the rotor, and then use gasoline to clean the bearings on the oil scale, lubricating oil selection of high quality "butter", use the hand to move the fan leaves if a few circles to stop, then the need to refueling, if the more than 10 circles can be slowly stopped, that means no refueling.