Submersible pumps often fail in service, many of which are caused by the use of stainless steel submersible pumps, which are not properly maintained. Submersible pumps in the installation and use of the maintenance process must pay attention to the following questions. 1, submersible pump can not be dehydrated. Test run in anhydrous conditions, the time shall not exceed 5 minutes. During the pumping process, if the water level keeps dropping, care must be taken not to expose the pump body to the surface of the water. 2, the submersible pump can not be restarted immediately after shutdown, must be within the tube after the return of water storage can be started. If the water can not be started after the start-up, it should stop immediately to find out the reason and eliminate it. 3, different types of submersible pumps, should be used in accordance with the provisions of lift; supporting the rubber pipe, metal pipe or canvas pipe diameter should meet the technical requirements. Submersible pump installation and use 4, submersible pump into the water or raised water, you must pull the "ear climbing" on the rope, never pull the cable. To transport, disassembly or maintenance, you should first cut off the power. 5, the submersible pump diving depth is generally 0.5 to 3.0 meters, submersible pump diving into the water, should be lifted vertically, can not be lying, but can not fall into the mud. 6, submersible pumps should not be started frequently, shall not be used for drainage and sediment high water or muddy water. When used outside the pump can be used bamboo or wire mesh Cui live to prevent water weeds plug the submersible pump grid or stuck pump impeller. 7, boot, if the impeller reversal (when the amount of water is greatly reduced or no water), should immediately shut down, replace the three-phase cable in the core of any two phases, so that the water is positive. Personnel should be in charge of the work and find abnormalities to stop immediately check. 8, submersible pump should be used DFA - 25/330 automatic air circuit breaker as a control device. In the absence of such switches, three-phase knife switches are also available, provided 6 Amp electrical fuses are fitted. 9, the power supply should be selected according to regulations, if the power supply and the pump using the short distance, the wire cross-sectional area of ​​the cable should be appropriately increased, the joint should be minimal to ensure the normal use of submersible pump voltage between 342-418 volts . To ensure safety, a metal rod with a length of 1 meter or more can be buried in the wet place near the power supply or water pump as a ground wire.