The fan of the electric car charger is not turning, what should I do!

How to repair the electric car charger fan does not turn:

Remove the fan with a screwdriver, scrape a small hole with a knife in the center of the stator side, that is, at the tip of the shaft, expose the tip of the shaft, drip in lubricating oil, wait for a while, dial the fan blade with your hand, and turn it for a while. When it is easy to turn it by hand, it means that it has been repaired, and you can continue to use it when you install the machine.

1. First use a multimeter.

Measurement—The triode that controls the fan down.

Whether it is damaged, if the tube is not damaged, it may be that the fan itself is damaged, you can unplug the fan from the circuit board and connect it to a 12V direct current.

Pay attention to the positive and negative poles) to see if they rotate, and also to see if there are foreign objects stuck.

2. If the fan rotates after swinging the wire a few times, it means that there is a broken wire inside the wire or the joint is not in good contact. If it still does not rotate, the fan will be broken, replace the electric fan.

3. For chargers with intelligent heat dissipation, in addition to the above checks, the thermistor should also be checked.

Whether it is in poor contact or damage, open welding, etc. However, it should be noted that this thermistor has a negative temperature coefficient and should be taken care of when replacing it.

The main cause of the fault is that the triode that controls the fan (usually 8550 or 8050) is damaged, or the fan itself is damaged or the fan blade is stuck by debris. However, some chargers use intelligent heat dissipation, and for chargers that use this way to dissipate heat, the probability of thermistor damage is very high.

If there is a matching fan that can be replaced, replace it, if not, then you need to replace the entire charger.

Battery car charger repair.

First of all, check whether the fan motor has a mechanical card (hold) shaft? Check the winding and wiring again? Check if the input voltage is normal?

Yes, it doesn't cost much to replace the fan.

Can the transistor 8050 be replaced by the 8550.

Went for a change and it was good.

If the fan is broken, it is best to replace it, otherwise it will cause the power device inside to heat up and dissipate, resulting in too high temperature rise and damage, especially when the temperature is high, the temperature is very high

If the fan doesn't turn at the beginning of charging, then the charger cannot be used.

It may be caused by damage to the fan controller, which can be detected with a multimeter; It may be that the fan's wires are in poor contact, try to refix the wires or solder the wires to the plug position; It may be that the thermistor is damaged and the weld is opened, try to replace the resistor.

1. Use a multimeter to measure whether the triode of the lower control fan is damaged, if it is not damaged, then it may be that the fan itself is damaged, you can unplug the fan from the circuit board, and connect a 12V direct current to see if it will rotate;

2. You can also check the wire of the fan, if the fan rotates after fiddling with the wire, it means that the inside of the wire is broken or the joint is not in good contact, if it still does not rotate, it also means that there is a problem with the fan and the electric fan needs to be replaced;

3. For chargers with intelligent heat dissipation, in addition to the above inspections, you should also check whether the thermistor is in poor contact or damaged, open welding, etc.

If the fan blades of the electric vehicle charger do not rotate, it will affect the heat dissipation effect of the electric vehicle, and the temperature of the battery and charger will increase during charging, which will greatly reduce the charging efficiency, and even produce spontaneous combustion in serious cases. It is the transistor that controls the fan blade is damaged, causing the charger fan blade to not operate normally. The easiest way to deal with this problem is to replace the transistor.

Do not turn. When fully charged, the charger will stop working.

Electric bikes.

When the battery is saturated, the control circuit of the charger will automatically turn off the cooling fan, and the center core lights up green to indicate that the charger can be removed.

It is normal for the fan to stop after the battery of the electric excavator has been fully charged and the charging indicator light turns green; The charging indicator is red, and the fan does not rotate during charging, which should be a problem with the fan or the return fan circuit; If the battery is not full, the charger does not show a red light (the fan does not rotate), and it cannot be charged normally, it should be that the charger is damaged or the relevant line of the electric vehicle is faulty.