Sounds like a low voltage issue to controller
I would start by checking voltage drop across battery then look at connections, fuses and relays
I had an older one that the negative cable was corroded and that caused a low voltage issue
Battery will show 12-13 volts until you turn on key then drop to 9-10 volts which is not enough when trying to start
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.