POS Carrier 7300 X4s keep shutting down after defrost.

Every unit my company has bought since 2013 does this, doesn't matter what the outside temp or weather conditions.

Reefer will finish defrosting, it will run for about 5 minutes and not cool then will eventually shut off due to not maintaining temp. Only code it will show is "check refrigeration system." Eventually after that it will clear the code on its own, and it starts up and run fine.

It is NOT icing up, it will do this randomly no matter what the weather is like outside.

Carrier has no explanation for why their noisy rattle traps keep acting up.

 

Trust me buddy, I've already tried everything you've mentioned. I'm not saying every unit that carrier produced, LOL we only have about 30 trailers in our Fleet.

Every time I pre-trip one it passes fine. Chutes are clear, hung correctly, nothing is blocking the front, no smash bulkheads in any of our trailers. If that were the problem it would be acting up constantly, not just after the defrost.

I think that something is randomly hanging up after it finishes defrosting.

It will shut down and display the orange fault light for maybe five or ten minutes, then it will simply start back up and clear the codes on its own.

Something is not opening or closing correctly causing it to eventually shut down. This is not something a pre-trip would catch anyway, since the unit doesn't defrost in pre-trip mode.

90% of the drivers at refrigerated companies are too stupid to actually watch or pay attention to their equipment anyway. I notice any time one of our units so much as hiccups the wrong way.