I just bought what seems to be a non working XMT 304 CC/CV. After connecting up the 240V AC to the black and white input leads, with ground on the green lead, and the red lead insulated, powering it up produces nothing. No display or lights at all. My understanding of this unit is that it auto detects the 240/480 V single phase or 3 phase.
I just downloaded the manual, and will be studying the schematics for voltages I might check to locate the problem. So far, all I know is that the 240V AC gets through the power switch.
I am just asking at this point if anyone has or can recommend any additional diagnostic information that might be useful.