The fully automatic self-cleaning filter has the function of filtering raw water and automatically cleaning and discharging the filter element, and the system supplies water continuously during cleaning and discharging. There are two control methods for the cleaning of the fully automatic self-cleaning filter: automatic control and manual control. Automatic control: There are two ways of automatic control: timing and pressure difference. Set the filtration time on the filtration time timer. When the filtration time is up, start the sewage discharge, and the sewage discharge time is set by the sewage discharge time timer; at the same time, the control system compares the system pressure difference with the pressure difference set by the user in real time. When the system pressure When the pressure difference reaches the set pressure difference, the filter is also cleaned and discharged, and the blowdown time is set by the blowdown time timer. When the blowdown time is up, the cleaning is stopped, and the system returns to its original state, ready for the next filtration process. Manual control: Turn the manual/automatic selection switch on the operation panel to the manual position, and the filter will be drained. Users can choose two control methods according to their needs.