I have a 2017 unit on my 17 cascadia and it threw the orange triangle and shut off the ac but the unit was still running so I would reset it and it would work for a few hours and shut off again. Yesterday it threw the red triangle and the ALT light and would shut off after 2-5 mins. Took it to Thermo king they said alternator was bad changed it and did a full PM. One day later and it’s throwing the orange triangle again shutting off the ac but the unit is still running. On a side note my apu no longer goes into standby when I cycle the key in the ignition. I can turn on the truck engine and the apu will still be running. What could this be, please help.

