Unable to start
First, check the power supply situation: whether the connector is firmly connected; whether the switch is in close contact; whether the fuse is blown; whether the three-phase power supply is equal. If there is an open circuit, poor contact, blown fuse, or missing phase, the cause should be found out and repaired in time. Secondly, check whether it is a mechanical failure of the pump itself. Common reasons include: packing is too tight or the impeller and pump body are jammed and blocked by debris; the pump shaft, bearing, and leakage reduction ring are rusted; the pump shaft is severely bent, etc. Remedy: loosen the packing, dredge the water channel; disassemble the pump body to remove debris and rust; remove the pump shaft for correction or replace with a new pump shaft.
The pump heats up
Reason: bearing damage; rolling bearing or bracket cover gap is too small; pump shaft is bent or two shafts are not concentric; tape is too tight; lack of oil or oil quality is not good; the balance hole on the impeller is blocked, the impeller loses balance and increases the direction Thrust on one side. Remedy: replace the bearing; remove the back cover, install a gasket between the bracket and the bearing seat; investigate the pump shaft or adjust the concentricity of the two shafts; appropriately loosen the tape tightness; add clean butter, and the butter occupies the bearing About 60% of the inner gap; clear the blockage in the balance hole.
Can't suck water
The reason is that there is air in the pump body or the gas in the water inlet pipe, or the bottom valve is not closed tightly, and the water is not fully filled, the vacuum pump packing is seriously leaking, and the gate valve or the flap door is not closed tightly. Remedy: First press the water up, 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 air leakage in the pipelines and joints. If air leakage is found, apply lubricating oil or mixed paint to the joints 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. Water or air leakage in the pipeline. The nut may not be tightened tightly during installation. If the leakage is not serious, apply cement or cement slurry mixed with asphalt oil on the leaking or water leaking place. Temporary repairs can be coated with wet mud or soft soap. If there is water leakage at the joint, you can use a wrench to tighten the nut. If the water leakage is serious, you must re-disassemble and replace the cracked pipe; reduce the head and press the nozzle of the pump into the water 0.5m.
Severe vibration
The main reasons are as follows: the electric rotor is unbalanced; the coupling is not well connected; the bearing is worn and bent; the parts of the rotating part are loose or broken; the pipeline support is not strong and so on. Measures such as adjustment, repair, reinforcement, straightening, and replacement can be taken separately.