Causes of abnormal noise during Ariea charging:

1. The charger cooling fan bearing is short of oil. When the charger is working, the fan will make noise due to rotation and friction.

2. When an electric vehicle is charging, it will generate a lot of heat. At this time, the fan will start to run to ensure heat dissipation. Charging an electric vehicle in a high-temperature environment will cause the charger's cooling fan to rotate faster, which will make the noise louder.

3. Once the charger has components falling off, its charging parameters will change, which will cause uneven charging voltage, heat up the charger, cause the cooling fan to rotate abnormally, and generate noise.