The first gear of the fan is right, and the second and third gears are reversed

Maybe the switch is reversed, or the circuit is reversed after the switch, and the resistance of the blower is also problematic, you can try another one.

Hello! 1. Check whether the mechanical part of the fan is stuck and whether it rotates flexibly. 2. Check whether the capacity of the starting capacitor is reduced, and if possible, replace it with a capacitor of the same specification.

Generally, if there is no problem with these two eggplants, it should be able to operate normally. 3. In the case of no power-on, dial the blades of the fan by hand to see if the rotation is flexible, if the rotation is flexible, the fault is probably caused by the decrease in the capacity of the starting capacitor, and the new capacitor of the same capacity should be replaced. 4. If there is resistance to the rotation of the fan blades, it is mostly caused by the wear or drying of the motor bearing, and the new bearing should be replaced or the lubricating oil should be cleaned.

Hello pro, the electric fan does not turn in gear.

The phenomenon that the second and third gears can be turned has the following reasons for the dullness: 1Electric Fan Speed Controller Issues:

The speed of the first gear is the lowest, and the speed of the second and third gears gradually increases, because the speed controller of the electric fan fails in the first gear, causing the motor to not work normally. But because.

The voltage is higher when the second and third gears are working, which can make up for the inertia when the motor starts, so it is in.

The second and third gears can be made normally. 2.Motor problem: If there is a problem with the motor of the electric fan itself, such as broken wire, poor contact, aging of the brush, etc., it will cause the speed of the first gear to be too low to start, but.

After the acceleration of the second and third troubles, the motor can be driven to rotate normally. 3.Power issues:

Electric fans require a specific power supply, and if the power supply is unstable, it will affect the fan start and speed. The first gear requires a lower starting voltage and is more susceptible to the power supply that causes it to fail to start.

The second and third gears can start the motor to work normally due to higher voltage.

The electric fan does not rotate when the first gear is opened, only the second or third gear is opened first, and then it is turned when it is lowered to the first gear, which is the speed control capacitor of the electric fan is broken, and the normal state of the electric fan can be restored by replacing the speed control capacitor, the specific operation steps are as follows:

1. Remove the fixing screws on the back cover of the electric fan.

2. Open the back cover of the electric fan.

3. Find the capacitors that sell the silver to work internally.

4. Replace the new cracked capacitor according to the pin position.

5. Resume the installation experiment, everything is normal.

Hello, I am glad to answer for you: the second gear circuit is not through, first check whether the key switch in the cavity is due to poor oxidation contact, whether the spring prestress is weakened, etc., and secondly, whether the winding lead is desoldered and disconnected. Note:

Low-power motors such as DC motors and brushless DC motors are also being widely used in small fans. When the electric fan is working (assuming that there is no heat transfer between the room and the outside world), the temperature in the room will not only not decrease, but will rise. Let's analyze the reasons for the increase in temperature:

When the electric fan is working, because there is an electric current through the coil of the electric fan, the wire is resistive, so it will inevitably generate heat to the outside, and the temperature will naturally rise to the top of the high. But why do people feel cool? Because there is a lot of sweat on the surface of the human body, when the electric fan works.