Fault phenomenon

Cause analysis

Exclusion method

Insufficient traffic

Or no water will come out

1. Impeller rotation error

2. Is the valve open and intact

3. The pipeline is blocked

4. Low speed

5. Head too high

6. The density of the pumping medium is relatively high

7. High viscosity of the medium

8. Damaged sealing ring (at the mouth ring)

1. Adjust the rotation direction of the impeller

2. Check, repair, and eliminate

3. Clean up debris

4. Check electrical equipment and circuits

5. Change the pump or reduce the head

6. Dilute with water to reduce concentration

7. Reduce viscosity

8. Replace

Unstable operation

1. Unbalanced impeller

2. Bearing damage

1. Send to the manufacturer for replacement or calibration

2. Replace the impeller

The pump cannot start

1. Lack of phase

2. Impeller stuck

3. Winding, connector or cable open circuit

4. Stator winding burnt out

5. Electrical control malfunction

1. Check the circuit for repair

2. Remove debris

3. Use an ohmmeter to check and repair

4. Repair and replace the winding

5. Repair or replace

Excessive current

1. Low working voltage

2. Pipeline and impeller blockage

3. Transporting liquids that have passed or have high viscosity

4. Using a lift that is too high

1. Adjust the working voltage

2. Clean the pipeline and replace the winding

3. Change density or viscosity

4. Reduce traffic and increase traffic

Low insulation resistance

1. Leakage at the power supply terminal of the cable

2. Cable damage

3. Mechanical seal wear leads to leakage

4. Failure of each O-ring seal

5. The casing is corroded by the medium and leaks water

1. Tighten the compression nut

2. Replace

3. Replace

4. Replace

5. Repair