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First, the sewage pump inspection and maintenance of AS sewage pump, ZW sewage pump, WQ sewage pump product performance, stable and reliable operation, each pump at the factory have a rigorous appearance test, permanently lubricated ball bearings and oil chamber operation Of the high-quality mechanical seal 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 be greater than 2MΩ, or should be disassembled overhaul (for drying), should also check the grounding is solid.
2. The clearance between the impeller and the tearing mechanism (base cover) is 0.3 ~ 0.5mm. After long-term use in the medium, the clearance may increase due to wear and tear and should be adjusted at this time. Disconnect Power, loosen setscrew, the cover rotated at an appropriate angle to restore the original gap.
3. 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 the sewage pump.
4. 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 maintenance . 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.
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).
Second, sewage pump failure reasons and troubleshooting 1, the pump flow or lift down
Reason analysis and elimination method
Pump reversal.
Transport lift is too high.
Aspirated medium bypassed.
Outlet pipe leak.
Ports may be blocked by sediment.
Pump partially blocked.
Impeller or base worn.
Turn off the control box of the total power, exchange two-phase power cord.
Check: Selection is correct; outlet pipe size is correct.
Check if the valve is shut off and test the pump at full load.
Find leaks and repair.
Check the pipeline, clean or replace.
Check and clean the pump (included in the filter).
Adjust clearance or replace parts.
2, no flow after pump operation
Reason analysis and elimination method
Gas plug.
Check out the water discharge valve.
Pump reversal.
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; check the valve installation direction is wrong;
Turn off the main power, replace the second-line power cord.
3, pump start and stop too often
Reason analysis and elimination method
Float switch selected distance is too short.
Check valve failure, check valve is not only back, so that the liquid back into the sewage tank.
a, readjust the float switch to extend the running time.
B, check the valve and maintenance.
4, the pump can not stop
Reason analysis and elimination method
Float switch malfunction.
Float float card in the work place.
Check and replace as needed.
Release, adjust the position as needed.
5, the pump starts, the circuit breaker, overload device jump open
Reason analysis and elimination method
The voltage is too low.
The voltage is too high.
Motor wiring error.
Sediment deposits on the bottom of the volute.
Check the voltage, if the voltage is too low you can not use; cable is too long, causing pressure drop is too large, should try to shorten the cable, and the appropriate choice of thicker cable.
Using a transformer, adjust the voltage to the normal range.
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.
6, the pump can not be started, blown fuse or circuit breaker jump open
Reason analysis and elimination method
Float fault.
Winding, connector or cable is shorted.
Pump blocked.
Check whether the bypass float switch can start the pump, if so, check the float switch.
Check with ohmmeter, if the short circuit should check the windings, terminals and cables.
Turn off the power, remove the pump from the sump, clear the obstruction, and try it out before resetting.
7, the pump can not start
Reason analysis and elimination method
No electricity.
Winding, cable, terminal or control box open.
Check the control box power is normal.
Check cables, motor connections and windings.
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