First, the inspection and maintenance AS sewage pump, AV sewage pump, WQ sewage pump series, excellent product performance, stable and reliable operation, each pump in the factory have a rigorous appearance testing, permanently lubricated ball bearings and in the oil chamber operation Of the quality mechanical seal so that the sewage pump has the greatest durability, however, in order to ensure the life of the sewage pump, it is recommended to use the unit for regular inspection and maintenance .1, Regularly check the pump motor phase and the relative insulation resistance, the value should More than 2MΩ, or should be disassembled overhaul (for drying treatment), and should check the grounding is solid. 2, the gap between the impeller and the tearing mechanism (base cover) is 0.3 ~ 0.5mm, long-term use in the medium, This gap may increase due to wear and tear, this time should be adjusted, as follows: Disconnect the power, loosen the set screw, the cover plate rotated an appropriate angle to restore the original gap. Must be placed in clean water after a few minutes to run, to prevent the pump chamber to leave the sediment, affecting the normal use of sewage pump 4, the sewage pump in the media used six months after the inspection should seal the oil chamber, replace 1 0 # ~ 30 # oil, if necessary, replace the mechanical seal, for poor working conditions in the case of sewage pump should be regularly overhauled. Oil change method is as follows: Place the pump so that the oil chamber plug (located inside the outlet (70% ~ 80%), replace the new O-ring and tighten the screw plug. If the waste oil found in the water (milk Shaped emulsion) Clean the oil chamber as required and re-install the oil, the use of three weeks must be re-examined once again found that the lubricant into an emulsion, the mechanical seal should be checked, if necessary, be replaced (contact with our maintenance department) If there are replacement conditions in the field, airtight test (air pressure 0.5kg / cm2) should be carried out after the seal is replaced 5. If the blowdown pump is faulty and the cause can not be determined and the solution still can not be provided according to the following, please Do not take a temporary casual approach, not to disrupt the mess disorderly, should contact with our maintenance department, we will be the fastest and best service for you to solve the problem. Second, the sewage pump failure reasons and troubleshooting 1, the pump Flow or head down Analysis of the reasons for the elimination of a, anti-pump b, the delivery lift is too high c, the suction of the media take the bypass d, the outlet pipe leak e, the outlet pipe may be blocked by sediment f, pump partially blocked g, impeller or base wear a, Turn off the control box of the total power, replace the two-phase power cord. B, check: the selection is correct; outlet size is correct c, check the valve is shut down, and then full load test pump d, , And maintenance. E, check the pipeline, cleaning or replacement. F, check and clean the pump (included in the filter used in the) g, adjust the gap or replace the parts 2, no flow after the pump operation Analysis and troubleshooting a , Air plug. B, check the water discharge valve. C, pump reversal. A, frequently open and close the valve; start and stop the pump several times, start / stop the pump time between 2 to 3 minutes; according to the installation method, check whether Need to install the release valve. B, open the valve; check the valve installation direction is wrong; c, turn off the total power supply, exchange the second-line power cord. 3, stop moving too frequently Cause analysis and troubleshooting a, float switch selected distance is too short. b, check valve failure, check valve is not only back, so that the liquid back into the sewage pool. A, readjust the float switch to extend Running time b, check the valve and maintenance 4, the pump can not stop the cause of the analysis and troubleshooting a, float switch function failure b, floating float card in the work place a, check and replace as needed b, release, According to the need to adjust the position. 5, the pump starts, the circuit breaker, overload jump cause analysis and troubleshooting a, the voltage is too low. B, the voltage is too high c, the motor wiring error d, deposits in the bottom of the volute a, check the voltage, if the voltage is too low, can not be used; the cable is too long, causing the pressure drop is too large, should try to shorten the cable, and the appropriate choice of thicker cable. b, the use of transformers, the voltage is adjusted to the normal range Check the cable color code and connector label in the control box and check the wiring d, Clean the pump and sump, see the relevant part of the installation instructions 6, The pump can not start, the fuse blown or circuit breaker jump Cause analysis and exclusion A, check whether the bypass float switch can start the pump, if so, check the float switch b, check with the ohmmeter, If the short circuit should be checked windings, lugs and cables. C, cut off the power, the pump out of the sewage pool, Remove obstacles, reset before the first trial. 7, the pump can not start Reason Analysis and Troubleshooting a, no electricity b, winding, cable, wiring or control box open circuit a, check the control box power is normal b, check the cable , Motor connector and winding.