Common Faults of Electric Fans and Solutions
In the south of our country, it is almost summer now. Now many families have air conditioning. At the same time, there are many air conditioning diseases. So many families are willing to use electric fans when the weather is not very hot. Sometimes the electric fan has not been used for a year, so it is difficult to take it out. Sometimes it can solve problems by itself. Next, I will share with you some common faults and solutions of electric fans.
Maintenance of fan motor without turning
The main reasons why the motor does not turn are: winding break, oil shortage, abnormal capacitance and so on. From the maintenance practice of electric fans, the latter two kinds of faults are mostly. For non-rotating fans, my maintenance steps are to measure plugs, rotating motors, capacitance measurement, and reprocessing.
The first step is to measure the fan operation and speed regulating winding. Turn the fan timer first. When you hear the click, it shows that the timer is normal. If there is no ticking, the timer is damaged. If there is no resistance value, it may be that the motor winding is burnt out and the circuit is broken. For a motor with a series of hot fuses, it may be that the hot fuse opens the circuit, and the motor should be dismantled to have a look. If the motor is only open, the short connection of the hot fuse can restore normal. All gear switches are damaged, but there is little possibility.
The second step is to check whether or not to hold the shaft, remove the fan shield, and rotate the motor shaft manually. If it does not move, it means that the motor holds the shaft seriously. Remove the motor, first remove the oil stain and rust on the front and rear axle sleeve and motor shaft, then add enough sewing oil on the front and rear axle sleeve felt, most of the fans can remove the fault.
The third step is to measure the starting capacitance. If the motor shaft rotates flexibly, it is necessary to measure the starting capacitance of the fan motor. Firstly, the resistance values of the whole fan motor's running, starting and speed regulating windings, i.e. the resistance values of black and yellow leads, are measured with the multimeter R * 100 gear.