Automatic back-washing mode:When the pump sucks the water from the fish pond to the inlet bin of the micro-filter and flows into the drum, the drum filter net accumulates foreign matter to a certain amount to block, resulting in reduced water output, the inlet bin water level rises, the liquid level sensing switch automatically opens, concurrently,the controller opens the back-washing mode。1： Put the water pump into the fish pond，connect the outlet pipe with the micro-filter inlet pipe 2: The water outlet is a natural outflow to the fish pond, the pipe diameter can not be less than the factory configuration, otherwise the micro-water level is too high, the machine starts continuously 3: The sewage pipe can be connected to the sewer or stored for use as fertilizer 4: After the pipe is connected, plug in the controller power supply, display (--) Note: 1. When the drum is rotating, do not press the drum by hand, otherwise the motor gear will be damaged 2, do not start the equipment before water, otherwise the cleaning pump dry burn damage. 3. When the device is delivered, the controller has been adjusted to automatic mode by default. 4, when there are too many impurities in the water, the equipment will continue to work until the impurities are filtered, and the equipment will start to reduce accordingly. Common faults: 1. The cleaning nozzle tube can be manually rotated to a suitable Angle. lf the cleaning nozzle is blocked, the stainless steel nozzle needs to be twisted out for cleaning.2. The drum filter is dried for a long time or the particles are solidified in the filter for a long time.which will also cause the equipment to work frequently, and can be cleaned with a soft toothbrush inside diameter Specification ： Inlet diameter 1-1/2“(48.25mm) outlet diameter 2-1/2”(73mm) Sewage diameter1-1/2“(48.25mm) Product size：26“*13”*15“