Common faults of water pumps
please see the table below:
| Symptom | Possible Cause | Solution |
| Mechanical seal leakage | Impurities in the medium | Improve media filtration and replace or clean the filter (core) promptly. |
| Air mixed in the medium | Increase exhaust flow and install automatic exhaust valves in the pipeline. | |
| Pump inlet pressure too low, causing cavitation | Improve inlet conditions and increase inlet pressure. | |
| Flow rate deviation, pump head too high | Adjust the pump's operating point to an appropriate value. | |
| Incompatibility between the medium and the mechanical seal material, improper mechanical seal selection | Replace the appropriate type of mechanical seal. | |
| Improper flushing or cooling pipe installation | Re-adjust the installation. | |
| Pump noise and vibration | Air entering the pump | Install an automatic air vent at the highest point in the pipeline |
| Cavitation in the pump | Improve inlet conditions, increase inlet pressure, and reduce the outlet valve | |
| Foreign matter in the pump | Disassemble the pump and remove foreign matter | |
| Lack of oil in the pump or motor bearings | Lubricate more thoroughly and replace bearings if necessary | |
| Poor coupling alignment | Realign and replace damaged coupling components if necessary | |
| Motor temperature too high | Ambient temperature too high | Increase pump room ventilation |
| Pump flow rate deviation, causing motor overcurrent | Control the pump operating point within a reasonable range | |
| Voltage too low or too high | Improve power supply voltage | |
| Motor bearing failure | Lubricate or replace bearings | |
| Motor fan failure | Troubleshoot fan failure | |
| Coupling misalignment | Realign |
Maintenance of water pump system
- Regularly clean the exterior of the water pump and motor, and regularly clean the components inside the electrical control cabinet (using a vacuum cleaner is recommended).
- Regularly inspect the connections and fastenings of the water pump and piping, and regularly check the wiring inside the electrical control cabinet for loose connections.
- Regularly add or replace grease to the bearings of the water pump and motor. For components lubricated with thin oil, check the oil level frequently to ensure it is neither too high nor too low, and consider changing the oil if necessary. If bearings are deteriorating, replace them promptly.
- Regularly inspect the filter at the water pump inlet and replace or clean the filter screen (core) promptly.
- Regularly inspect the water pump mechanical seal for leaks. If leaks are detected, identify the cause, correct it, and replace a new mechanical seal.
- Regularly check the alignment of the water pump coupling and adjust it appropriately.
- Regularly inspect the motor insulation.
- Regularly check the actual operating point of the water pump to ensure it is normal. If not, adjust it appropriately.