reefer unit question...possible issue

The heat can really play havoc on these units. Two things come to mind... first you could have a coolant leak, or there's a problem with the pump or expansion valve. Just because it was recently serviced doesn't preclude the possibility of a failure in the system.

 

I've had a trailer like that the unit kept trying to defrost and it wouldn't... Dropped it at a shop lol

 

Coolant temp alarm needs to be fixed first. If the high coolant temp alarm is shutting down the unit, it won't matter what you set it at. Look for leaks around coolant hoses and check the water pump weep hole. Make sure the radiator is clear and it's fan and shroud are intact and working. If that doesn't reveal anything obvious, you need a shop to check the sensor and electronics, as well as look over things with a trained eye.

Now with that out of the way, assuming everything else is ok, you're still on track for a claim on the top layer of product. Cycle mode usually doesn't limit outlet temp and can freeze the top layer of product. Continuous mode will control outlet temp to within a few degrees of set point and should be used on a produce load anyway to circulate the air better and control heat/humidity coming off the product as it ripens.

Didn't anyone brief you on operating that equipment before sending you on your way to the onion shed?

 

Hahahahahaha.....don't talk stupid stuff....at 50 degrees at cycle there is no way that top layer will freeze smart #####....what the outlet temp.will go 17 degrees down...shut up.....and drive ur miles driver

 

Had the exact same problem with my 2012 unit....they replaced heat coils...she runs fine rite now...

 

RedForman is right. Under the right circumstances- especially a hot humid day that the reefer is having a hard time keeping up with, the cold outlet air will freeze the top layer.