Thanks for sharing. My question is, why are you running your reefer while the doors are open and backed to a dock? The reason the alarm comes on is that you shouldn't run a reefer unit when doors are open as it causes warmer air to be returned to the heat exchanger in the trailer. The way a reefer works is it blows air warm or cooled air based on your set point through the upper shout. While the doors are shut, the air hits the back door and is forced down to the floor where the return suction air flows under the pallets, hence the grooved floors back to the unit. And it continues the cycle. If the doors are open , it doesn't allow the cycle to return at the set point. Have you ever experienced the running unit go into a defrost mode when the door is open? It's due to icing at the condenser. We are required to cool or heat the unit prior to pickup and keep product at temp while tranporting. If a shipper or receiver isn't ready to load or unload, you should keep doors closed. Once they are ready to offload, you should shut the unit down, and they can then transfer product to their cooler storage.
That’s all good and well. Now that you’ve explained this, can you answer what to do when you’re called to a door and the shipper waits an hour to load you and your reefer temp has risen ten degrees because the alarm shut off the reefer motor and now they refuse to load you?
