Add coolant.
Open the water tank cover when the machine is cold and check the liquid level inside the water tank. If the liquid level is lower than the low liquid level warning line marked on the water tank, you should add an appropriate amount of pure liquid to the water tank. In winter, it is necessary to mix and add water proportionally to prevent the water in the water tank and the body from freezing and cracking the body and the water tank. The function of antifreeze is to reduce the freezing temperature of water in the body. water reservoir. Generally, anti-rust liquid is added to the water tank in summer and anti-freeze liquid is added to the water tank in winter.
In the water tank, you can add water but the effect is not very good. Adding antifreeze or similar will have a better cooling effectidition.