The reason of variable frequency pumps can't stop the pump automatically

can't stop pump pumps, variable frequency pumps cannot stop pump, variable frequency pumps cannot be automatically stopped pumps

recently in debugging process of no negative pressure water supply equipment for the user variable frequency pump reaches the preset pressure does not automatically stop after running the phenomenon of pump, after the company engineers carefully check found the cause of variable frequency pumps cannot stop pump is due to the users to install pressure gauge with frequency conversion control cabinet preset pressure value can't be caused by, for example of frequency conversion control cabinet preset online is pressure reaches 0. Stop the pump automatically after 4 kg, and variable frequency pump outlet pressure gauge display reaches 0. Has not stopped after 4 kg of variable frequency pump, the engineers have high frequency adjustable speed to variable frequency water pump speed after the discharge pressure reached 0. 45 kg, horizontal centrifugal pump quickly stopped running, it shows that pressure gauge between the inverter and a certain interval error.

the other tests to the user when installing the hot water circulating pump due to the wrong the outlet valve, lead to work stop working when the pump is a pump in the reversal of the it shows the wrong direction of cut-off valve, which can cause a lot of liquid after stop running of pump back into the water tank is constantly cycle, this also is frequency conversion water pump can not be automatically stop the pump. Suggest user in the event of a failure so please communicate with engineers and engineers proposed relevant way a careful examination of all kinds of water pump products may be the cause of the problem.

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