All of a sudden I'm not getting more than 100mV or so on the tool output when M3 S24000 (100% for my spindle). I've confirmed the wiring is correct still with no shorts or opens on either lead. Also the voltage measurement was taken with the leads disconnected from the VFD. I'm not sure what would have caused this. Does this sound like something that can be corrected or am I looking at a hardware failure.