ERR Mini Cmd ACC in Hot Box Reefer not working properly...

The car may be seeing a DC offset that is triggering the conventional shutdown of the car.  A non-polarized cap would be a good start to see if it has an effect.  Try measuring the power getting to the electronics and see if there's a DC offset.  For testing, I just work on my bench with a short piece of track, I roll the car back and forth to "simulate" continuous motion.

Oh that's an idea, didn't read that shut down paragraph, but that's quite how it sounds over and over.

Thanks, I'll give that a try.

FIXED! Thanks John for the fix. The DC was the issue and it was caused by the LED I had on the output of the Mini Cmd ACC. I guess I need an incandescent or another LED turned around .

I have never had this problem before with the same Mini Cmd ACC, maybe this HBReefer is more sensitive or needs a resistor somewhere to decrease the gain of the DC sensing.

I guess I was super-smart when I used an incandescent!   Truthfully, I'm surprised the low current of the LED had enough influence, but all's well that ends well.

One of my ham friends in KY (I was on 80 meters just now) told me to turn the LED around after I explained what the issue was. Works fine. Two great hobbies! He reminded me that once on the air I fixed his scope. I guess that's paying it forward. Thanks again John.

Interesting, I guess it looks like a bell now and doesn't trigger the shutdown.