1, too much water or too little water. Generally, transparent cups can see the water level line, so pay attention to the water quantity. Add the right amount of water, throw it away if it is too much, and add the right amount of water if it is too little.
2, the nose is not smooth, not close to the wall, the lights will flash after power-on, and an alarm will be issued from time to time. It is necessary to adjust the nose wing to a suitable position to make the nose wing closely fit the wall.