Fault phenomenon | Possible causes | Exclusion method |
b.The running direction of the motor is wrong, and the speed of the motor is very slow. c. Air leakage of suction pipe d. The pump is not filled with liquid and there is air in the pump chamber e. The inlet water supply is insufficient, the suction head is too high, and the bottom valve leaks f. The pipeline resistance is too large and the pump selection is improper | a check and remove the obstruction b. Adjust the motor direction and tighten the motor wire. c. Tighten all sealing surfaces to remove air d. Open the pump cover or open the exhaust valve to exhaust the air e。 Shutdown inspection and adjustment (this phenomenon is easy to occur in grid connected water pipe and use with suction head) f. Reduce the pipeline bend, re select the pump | |
a. check according to 1 reason first b. The pipeline and the impeller of pump passage are partially blocked, and the valve opening is insufficient due to scale deposition c. The voltage is low d. Impeller wear | A first press 1 to exclude b. Remove the obstruction and readjust the valve opening. c. Steady voltage d. Replace impeller | |
a. Use in excess of rated flow b。 Suction head too high c. Bearing wear | a. Adjust the flow and turn down the outlet valve b. Check and eliminate c. Replace the bearing | |
a. Unstable pipeline support b. Liquid mixed with other c. Cavitation occurs d. Bearing wear f。 Overload heating operation of motor | a. Secure the piping b. Increase suction pressure. Exhaust c. Reduce the vacuum d. Replace the bearing | |
a. Excessive flow, overload operation b。 Rubbing c. Motor bearing damage d. Insufficient voltage | a. Turn down the outlet valve b. Check and eliminate c. Replace the bearing d. Voltage stabilization | |
6. Water pump leaking | 6. Water pump leaking | a. Replacement b. Welding repair or replacement c. Trimming d. Fastening |