The DC charging gun is used to connect the charging port of the electric vehicle and the DC fast charging pile to provide fast charging services for the vehicle. However, it may not be charged after being inserted during use. There are many reasons involved here.

1. The charging pile itself may be faulty or damaged, resulting in failure to provide power to the vehicle. In addition, if the charging port or charging gun of the vehicle fails or is damaged, it may also cause failure to charge normally.

2. The connection status between the DC charging gun and the vehicle will also affect the charging effect. If the vehicle is not properly inserted into the charging gun, or the charging gun is poorly connected to the vehicle, the connection may cause charging failure.

3. The power supply problem is also an important factor affecting charging. If there is a problem with the power supply of the DC charger, or the power supply voltage is insufficient or unstable, the charger will not work properly, which will affect the charging effect.

4. The matching problem between the vehicle and the charging pile may also cause charging failure. If the communication protocol of the vehicle and the charging pile does not match, or the charging parameters are incompatible, the charging process may not proceed normally.

5. It is necessary to consider the operational factors. If the user does not operate properly during the charging process, such as pulling out the gun directly without stopping charging, or the gun head is locked due to operational errors, it may also cause charging failure.

In summary, the reasons why the DC charging gun cannot be charged after being inserted may involve multiple aspects such as the charging pile, vehicle, charging gun, power supply, and operation. When encountering this situation, it is recommended that the user first check the status of the charging pile and charging gun, then check the power supply, and finally confirm whether the operation is correct. If the problem persists, it is recommended to contact a professional maintenance personnel for inspection and repair.