What's up with these new carrier units ?

I haven't pulled any 2017 units yet and have not seen one run like that in our newer fleet. Sounds like this may be an effect of the new system mentioned a few posts earlier.

 

Even when I'm driving 70 miles an hour down the road I can tell when the reefer goes into high extreme idle.

 

Are the new Carrier units still with that super low frequency noise in heat mode that rattles the sleeper and resonates through to scramble your brain?

 

Being belt driven it's dependent on settings. High air flow. If the load is too high or air shoots installed to tight can play a key also why the unit is trying to move more air.

 

I have to say agree w/the thought here...not the unit per say....26set is fresh.....and most likely loaded warm/moist....imho its a humidity deal....amount of moisture inside trl....giving slightly false ambient temp readings to sensors....so unit wants to rapidly readjust to readings....one of the reasons on field loaded produce loads....many of us disconnect the hi speed circuit....so it doesn't drive itself bat#### crazy constantly defrosting

 

Units should be off anyways whenever the trailer doors are open. It's the first question I always ask when dealing with a call out for an alarm. Follow up question is, have you done a manual defrost or has the unit ran through a defrost on its own. Usually the case.

 

Yeah they seem to Rev up after the first few seconds when it cuts back on when not set to continuous. They need to program them to not auto defrost when the doors are open.