Unable to start

Firstly, the power supply situation should be checked: whether the connector connection is secure; Check if the switch contacts are tight; Whether the fuse is blown; Is the three-phase power supply lacking equality. If there is an open circuit, poor contact, blown fuse, or missing phase, the cause should be identified and promptly repaired. Secondly, check if it is a mechanical fault of the water pump itself. Common reasons include: too tight packing or blockage between the impeller and the pump body caused by debris; Rust on the pump shaft, bearings, and leakage reducing ring; Severe bending of the pump shaft, etc. Elimination method: Loosen the filling material and dredge the drainage channel; Disassemble the pump body to remove debris and rust; Remove the pump shaft for calibration or replace it with a new one.

Water pump heating

Reason: Bearing damage; The clearance between rolling bearings or bracket covers is too small; The pump shaft is bent or the two shafts are not concentric; The tape is too tight; Lack of oil or poor oil quality; The balance hole on the impeller is blocked, causing the impeller to lose balance and increasing the thrust to one side. Troubleshooting: Replace the bearing; Remove the rear cover and install a gasket between the bracket and the bearing seat; Investigate the pump shaft or adjust the concentricity of the two shafts; Adjust the tightness of the tape appropriately; Add clean butter, which accounts for about 60% of the clearance in the bearing; Remove any blockages from the balance hole.

Unable to absorb water

The reason is that there is air in the pump body or air accumulation in the inlet pipe, or the bottom valve is not tightly closed, the water supply is insufficient, the vacuum pump packing is severely leaking, and the gate valve or flap valve is not tightly closed. Solution: First increase the water pressure, then fill the pump body with water, and then turn it on. At the same time, check whether the check valve is tight and whether there is any air leakage in the pipeline and joints. If any air leakage is found, apply lubricating oil or mixed paint to the joint after disassembly, and tighten the screws. Check the oil seal ring of the water pump shaft and replace it with a new one if it is severely worn. Pipeline leaks water or air. The nut may not be tightened tightly during installation. If the leakage is not severe, cement can be applied to the leaking area or cement slurry mixed with asphalt oil. Temporary repairs can be done with damp mud or soft soap. If there is water leakage at the joint, a wrench can be used to tighten the nut. If the leakage is severe, it must be reassembled and replaced with a cracked pipe; Reduce the head and press the nozzle of the water pump 0.5m underwater.