Turn on the power-on button, it shows that both fast charging and slow charging can complete the physical connection, but after turning off the power-on button, fast charging and slow charging cannot be connected, and the BMS activation relay should be checked first;

If the vehicle shows that only one charging mode can be physically connected, and no matter whether the power-on button is activated, the physical connection of another charging mode cannot be achieved, and the charging relay should be checked first, including checking whether the relay is in good condition. Whether the on-board charger outputs the activation voltage, etc.