We just got a 22A wire feeder at my work and I am having some problems getting the voltage read-out to work. The manual says connent the volt sense lead to the work, which I did, but I still get no read out. If I switch between wire speed and voltage really quickly while not welding I get random readings for a split second( 54.9, 3, 11.5, random numbers). Has anyone else had this happen or know how to properly use the volt sense lead?