1. The pump does not produce water.
Possible causes: a, the inlet and outlet valves are not open, the inlet and outlet pipes are blocked, and the flow path impeller is blocked.
b, the motor moves in the wrong direction, the motor is out of phase, and the number of revolutions is very slow.
c. The suction pipe leaks.
d. The pump is not filled with liquid, and there is air in the pump chamber.
e. The imported water supply is insufficient, the suction stroke is too high, and the bottom valve leaks.
f, the pipeline resistance is too large, the pump selection is not appropriate.
A considerable elimination method: a, check, remove the blockage.
b. Adjust the motor direction and tighten the motor wiring.
c. Tighten the sealing surfaces to remove air.
d. Open the upper cover of the pump or open the exhaust valve to drain the air.
e. Stop checking and adjusting (this phenomenon is easy to occur when the water pipe and the suction pipe are connected to the grid).
f. Reduce the curve of the pipeline and re-select the pump.
2. The pump flow is insufficient.
a, first check by 1, cause.
b. Part of the impeller of the pipeline and pump runner is blocked, scale is deposited, and the valve opening is insufficient.
c, the voltage is low.
d, impeller wear.
The corresponding elimination method: a, press 1, and exclude.
b. Remove the blockage and re-adjust the valve opening.
c, voltage regulation.
d. Replace the impeller.
3. The power is too large.
Possible causes:
a. Use more than the rated flow rate.
b, the suction stroke is too high.
c. Replace the bearing.
The corresponding elimination method: a, adjust the flow, close the small outlet valve.
b. Lower the mounting surface.
c. Replace the bearing.
4, noise vibration.
Possible causes: a, the pipeline support is unstable.
b, the liquid is mixed with gas.
c. Generate cavitation.
d, the bearing is damaged.
e, the motor is overloaded and running.
The corresponding elimination method: a, stabilize the pipeline.
b. Increase suction pressure and exhaust.
c. Reduce the degree of vacuum.
d, adjust according to 5.
5. The motor is hot.
Possible causes: a, the flow is too large, overload operation.
b. Rubbing.
c. The motor bearing is damaged.
d, the voltage is insufficient.
The corresponding elimination method: a, close the small outlet valve.
b. Check and exclude.
c. Replace the bearing.
d, voltage regulation.
6. The pump leaks.
Possible causes: a, mechanical seal wear.
b. The pump body has sand holes or cracks.
c. The sealing surface is not flat.
d. The mounting bolts are loose.
The corresponding elimination method: a, replacement.
b. Solder or replace.
c, trimming.
d. Fasten.
Maintenance of pipeline pump operation:
1. The inlet pipe must be filled with liquid, and the pump is prohibited from running for a long time under cavitation.
2. Check the motor current value regularly and do not exceed the rated current of the motor.
3. After long-term operation of the pump, due to mechanical wear, when the noise and vibration of the unit increase, stop the inspection and replace the vulnerable parts and bearings if necessary. The overhaul period of the unit is generally one year. 
MDVR Camera SystemsMDVR Camera SystemsMDVR Camera SystemsMDVR Camera SystemsMDVR Camera Systems
Mdvr Camera Systems,4G Vehicle Mdvr Recording System,Mobile Digital Video Recorder System,4G Mobile Digital Video Recorder
Vsstech Co.,Ltd. , https://www.vsstechcctv.com