1. Self-priming pump pump body did not add liquid storage or insufficient liquid storage: add enough.

2. Suction pipeline leakage: : eliminate pipeline leakage phenomenon, within the range of allowable suction check method pump startup 4-5 minutes water has not been sucked up, please use your ear close to the inlet pipe suspected of leakage to listen for the sound of inhalation, or suspected of leakage in the place of coating white latex to repair the method.

3. The suction distance is too high or the suction line is too long: reduce the suction distance or shorten the line.

4, the outlet pipe installation is not correct elbow too much: the pipeline into the n-shaped pipe too much it is recommended to install the automatic exhaust valve at the highest point.

5. The filter screen in the pump body or the inlet pipe is blocked by debris and stones: check and clear the blockage.

6. Excessive mechanical seal leakage: repair or replace.

7. Impeller damage or wear: replace the impeller with a new one.

8. Since the backflow hole of self-priming pump is blocked, the soda can't be separated: check and clean it up.

9. Reverse connection of three-phase motor: switch the two phases.

10. Voltage too low: adjust voltage.