[Al Skierkiewicz]

Marshall,
I don't remember you mentioning a fault condition. It is possible that a particular fault will shutdown the voltage mode and the software may be written to report 0 volts under that condition. It is possible for the any of the sense circuits to have had a fragment causing a short to supply. Say for instance, a short at the input of the current monitor could have artificially raised the voltage input to beyond current rating. In the Tan Jag there is no feedback from the output terminals so the zero volt condition must be derived mathematically from internals.