Hello,

I have a very surprising problem with my KH Director.
When asking for a measurement, nothing happen except that I get a noise from the pump. The pump doesn't run but only issue a noise.
Please note that when the pumps are used separately, they work properly (all 3). I have open and checked the KHD and everything look normal. The vent tube is OK.
Don't understand.
To illustrate, please look at the 20 seconds video through the link below.
Thanks


https://www.dropbox.com/s/t76jrnhvod..._1281.MOV?dl=0