Common faults and solutions of electric fans
2021-11-12
In the south of China, it is now approaching summer, and many families now have air conditioners, with many air conditioning diseases occurring. Therefore, many families are still willing to use electric fans when the weather is not very hot. "Electric fans sometimes haven't been used for a year, and it's not easy to take them out. Sometimes they can solve problems with their own hands.". Let's share with you common faults and solutions of electric fans.
Maintenance of electric fan motor not rotating
The main reasons for the motor not rotating include: open circuit in the winding, lack of oil to hold the shaft, abnormal capacitance, etc. According to the maintenance practice of electric fans, the latter two types of faults are most common. For non rotating electric fans, my maintenance steps are to measure the plug, rotating motor, capacitance, and reprocessing.
The first step is to measure the operation of the electric fan and the speed regulating winding. First, rotate the electric fan timer. When you hear a click, it indicates that the timer is normal. If there is no click, the timer is damaged. If there is no resistance value, it may be that the motor winding is burnt out and has an open circuit. For motors with thermal fuses in series, it may be that the thermal fuse is open. You should also disassemble the motor and take a look. If it is only an open circuit, short circuiting the thermal fuse can restore normal operation. All gear switches are damaged, but it is unlikely.
Step 2: Check whether the shaft is locked, remove the fan shield, and manually rotate the motor shaft. If it cannot rotate, it indicates that the motor shaft is seriously locked. When disassembling the motor, first remove the oil and rust from the front and rear shaft sleeves and motor shafts, and then add enough sewing oil to the felt of the front and rear shaft sleeves. Most electric fans can eliminate faults.
Step 3: Measure the starting capacitance. If the motor shaft rotates flexibly, measure the starting capacitance of the electric fan motor. First, use a multimeter R × At 100 Ω, measure the resistance values of both ends of the motor's starting capacitance and the entire electric fan motor's operating, starting, and speed regulating windings, that is, the resistance values of the black and yellow leads.
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