Overload: If the flow rate of the pump is too large or the head is too high, which exceeds the bearing capacity of the motor, the winding may overheat and eventually burn down.Therefore, it is necessary to select the appropriate pump according to the parameters of the motor to avoid overloading operation.

The ground wire is connected to the wrong power supply.There are four cores in the cable of the submersible pump. Be careful not to connect the ground wire as a power cord.

The temperature rise of the winding coil increases: due to the high-order harmonics of the inverter output, the loss of the winding coil increases, resulting in an increase in temperature rise.Especially at low speeds, this problem is even more serious.

Poor power quality: If the power frequency is too low, the power quality may be affected, which may affect the normal operation of the submersible pump.

Leakage problem.The characteristic of the submersible pump is that the machine pump is one body and does not enter the water together, so the problem of leakage is one of the important factors affecting the normal operation of the submersible pump.