Motor repair: If there is no fault in the motor, you can check the bearing of the motor. The insulation resistance and DC resistance of the motor have been measured, so the insulation should be checked. If possible, it can withstand voltage, turn-to-turn and so on.

Pump failures are:? The motor is hot, water can't be sucked in, it can't be started, and the water pump is hot.

Motor heating: the power supply problem is generally high or low voltage, and the voltage fluctuates widely.

When the motor is overheated. The power used by the water pump does not match, and the motor itself is wrongly connected. The working environment is also one of the reasons. At present, the working temperature of the environment exceeds 35℃. These problems are the causes of motor heating.

Can't absorb water: the first judgment is that there is gas in the pipeline. You can first open the excuse in the pipeline to make sure that the gas in the pipeline has been exhausted, and then rule out whether it is caused by air leakage. This general water pump user will not explain much.

Unable to start: First, determine whether the power supply is normal and whether it is the corresponding three-phase power supply, which is the problem of the motor itself.

Water pump heating: In general, water pump heating is more likely to damage bearings. In general, consider the cause of the bearing first, eliminate the blockage and try again.