I have an Eltee Pulsitron TRM21/EP300CP EDM machine that has a small problem (I hope). I haven't had it long, but when I first set it up, I could control the Z axis with the jog controls. Now I can't. If I switch the auto switch to on in the control cabinet, Z travels full extend. Switch it to manual, Z travels to full contract. The jog buttons do nothing.

In other words, I have no control over the movements of Z axis.

Any ideas?