What's the matter with the exhaust port of two-position five-way solenoid valve exhausting all the time?

a 1-year-old electrician has come to answer your questions. I have seen this a lot. First of all, the new solenoid valve you replaced is still leaking. It must be a cylinder problem. Detection method: there must be wind pressure when one solenoid valve is connected, and there should be no wind pressure on the other. You should remove the pipe without wind pressure to see if there is air. If the cylinder seal is not broken, there is no air at all. In addition, the weather is cold, and many cylinders with worn seals suddenly leak air after cold, so they should be replaced in advance. I used to be on duty at night, and it was very cold in the early morning, and suddenly several cylinders stopped working, which kept me busy. Although the cylinder is not owned by the electrician, the operator will find an electrician no matter if it is broken, which will make me angry.