Carrier apu comfort pro 200INT

Hi y'all

I have a carrier comfort pro 200INT dated 2021 build. It has started doing this funky crap where it will idle down as if shutting off but come right back up again. It has also started acting up while cranking as if it was starving for fuel (doesn't always do it). My company just put this unit in a couple months ago. Now when it idles down, sometimes my AC shuts off even though the fans are blowing (but not cold). Then I hear the AC compressor kick back on and get cold. But this can take a couple minutes. The only lights that are on are the sol hold and alt power (I believe this to be normal) from what I've read. Any help would be great thanx

 

The idle down is just a symptom that I'm experiencing. The AC works great. No the AC system hasn't changed. It's just when the APU idle drops, sometimes the AC compressor stops as well. Doesn't always do it. I'm just trying to figure the RPM dropping issue. I've been watching the DC voltage on my power inverter and it doesn't change. I have been running my microwave when this happens and it keeps working. So I'm not losing AC power either. I'll have to check the fuel filter again. It did seem OK last time I looked.