Fault phenomenon

cause analysis

Troubleshooting

Insufficient flow or no water output

1Wrong rotation direction of impeller

2Is the outlet valve open and intact

3The impeller of the pipeline is blocked

4The speed is too low

5The head is too high

6High density of pumping medium

7High viscosity of the medium

8Wear at the sealing ring mouth

1Adjust the rotation direction of the impeller

2Check, repair, and eliminate

3Clean up debris

4Check electrical equipment and circuits

5Change the pump or reduce the head

6Dilute with water to reduce concentration

7Reduce viscosity

8Replace

Unstable operation

1Unbalanced impeller

2Bearing damage

1Send to the manufacturing plant for replacement or calibration

2Replace

The pump cannot start

1Lack of phase

2The impeller is stuck

3Winding, connector or cable open circuit

4The stator winding is burnt out

5Electrical control malfunction

1Check the circuit for repair

2Remove debris

3Check and repair with an ohmmeter

4Repair and replace the winding

5Repair or replace

Excessive current

1Low working voltage

2Pipeline and impeller are blocked

3The height or viscosity of the liquid being pumped is relatively high

4Using a low head

1Adjust the working voltage

2Clean up pipeline and impeller blockages

3Change density and viscosity

4Reduce flow and increase head

Low insulation resistance

1Leakage at the power supply terminal of the cable

2Cable damage

3Mechanical seal wear leads to leakage

4EachOFailure of the sealing ring

5The casing is corroded by the medium and leaks water

1Tighten the compression nut

2Replace

3Replace

4Replace

5Repair