1. Open the cover of the auxiliary water tank.
2. Check the water level to ensure that the water level is higher than the minimum mark line.
3. If the water level is lower than the minimum mark line, use a clean bucket or water pipe to add water to the auxiliary water tank.
4. When adding water, slowly inject it to avoid water splashing.
5. After adding water, close the cover of the auxiliary water tank.
6. Note: The water quality of the auxiliary water tank should be kept clean. It is recommended to clean it once a month to avoid dirt and impurities affecting the normal work of the water pump and engine.