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Sewage pump failure analysis and treatment Daquan
First, the cause of the sewage pump failure and troubleshooting (a), the pump flow or lift down 1, pump reverse. 2, delivery lift is too high. 3 Aspirate the media by-pass. 4, the outlet pipe leaks. 5, the outlet pipe may be blocked by sediment. 6, the pump partially blocked. 7, impeller or base wear. 1, turn off the control box of the total power, exchange two-phase power cord. 2, check: the selection is correct; outlet pipe size is correct. 3, check whether the valve is shut down, and then full load test pump. 4, identify the leak, and maintenance. 5, check the pipeline, clean or replace. 6, inspection and cleaning pump (included in the filter used). 7, adjust the clearance or replacement parts. Ii, sewage pump start and stop too often 1, float switch selected distance is too short. 2, check valve failure, check valve is not only back, so that the liquid back into the sewage tank. 1, readjust the float switch, extend the running time. 2, check the valve and maintenance. Iii, no flow after the sewage pump operation 1, air plug. 2, pump reversal. 1, check the water discharge valve. 2, 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 the need to install the release valve; open the valve to check the valve installation direction is wrong; The total power, exchange two-wire power cord. Iv, sewage pump can not stop 1, float switch function failure. 2, floating float card in the work place. 1 Check and replace if necessary. 2, release, adjust the location as needed. ㈤, sewage pump can not start, fuse blown or circuit breaker jump 1 float fault winding. 2 Connector or cable shorted. 3 pump is blocked. 1, check whether the bypass float switch can start the pump, if so, check the float switch. 2, check with ohmmeter, so short circuit should check the winding, wiring terminals and cables. 3, cut off the power, the pump out of the sewage pool, remove obstacles, reset before the trial. ㈥, the pump can not start 1, no electricity. 2, winding, cable, terminal or control box open circuit. 1, check the control box power is normal. 3 Check the cables, motor connections and windings. ㈦, the pump starts, the circuit breaker, overload jump 1, the voltage is too low. 2, the voltage is too high. 3, the motor wiring error. 1, deposited in the bottom of the volute sediment. 2, check the voltage, if the voltage is too low you can not use; cable is too long, causing the pressure drop is too large, should try to shorten the cable, and the appropriate choice of thicker cables; use of transformers, the voltage adjusted to the normal range. 3 Check the cable color code and connector label in the control box and check the wiring; clean the pump and sump, see the relevant section in the installation instructions. Second, the sewage pump inspection and maintenance GW pipeline sewage pump, ZW self-priming sewage pump, WQ submersible sewage pump, YW liquid sewage pump product performance is excellent, stable and reliable operation, each pump at the factory have conducted a rigorous appearance test , Permanently lubricated ball bearings, and high-quality mechanical seals in the oil chamber provide maximum durability of the blowdown pump. However, to ensure the life of the blowdown pump, it is advisable to use the unit for periodic inspection and maintenance. 1, Regularly check the pump motor phase and the relative insulation resistance, the value should be greater than 2MΩ, or should be disassembled overhaul (for drying), should also check the grounding is solid. 2, sewage pump after repeated use must be placed in running water for a few minutes to prevent the pump chamber to leave sediment, affecting the normal use of sewage pump. 3, the sewage pump in the media used in the provisions of six months, the oil chamber should be sealed condition, replace the 10 # ~ 30 # oil, if necessary, replace the mechanical seal, for poor working conditions in the sewage pump should be used regularly . Change the oil as follows: Place the pump so that the oil chamber plug (inside the outlet) down, release the lubricating oil, and then wash the oil chamber with washing oil, re-injection of the right amount of oil (70% ~ 80% New O-ring and tighten the plug. 4, the gap between the impeller and the tearing mechanism (base cover) is 0.3 ~ 0.5mm, after long-term use in the medium, the gap may increase due to wear, this time should be adjusted, the method is as follows: Disconnect Power, loosen setscrew, the cover rotated at an appropriate angle to restore the original gap. 5. If there is water found in the waste oil (milk emulsion) according to the provisions of the oil chamber cleaning and re-loading, after three weeks of use must be re-examined once again found that the lubricant becomes emulsion, mechanical seal should be checked, if necessary To be replaced (contact with our maintenance department), if the site has replacement conditions, the seal should be replaced after the airtight test (air pressure 0.5kg / cm2).