My first night with a brand new APU

I have old tk unit. It is tied into truck coolant but it has shut off valve on coolant line. When it runs at night to charge batteries it also warms up coolant.
You got one of the worst apu's trying to save a few bucks. You'll lose that money you tried to "save" by spending time at the shop trying to fix your dinasys.

 

Open up the covers like Chuck Norris, unplug and reconnect every connection to every sensor on the motor, and try again.

 

I think today diesel APUs particularly TK and Carrier are superior to battery-powered, but I also believe that battery-powered are the future. They probably need some 5 more years to make it as practical as diesel APUs, and the trucks need to have solar panels on the roof.

 

My 2020 Cascadia has the 8 battery system from Freightliner. It has an electric a/c for sleeper and then coolant heater for the winter. Everything runs on the 8 batteries. When they get down to 12.2 the computer start the engine to recharge them. When the engine is running it will use the engine a/c system or the coolant for heat. They system will last about 6 hours before the engine need to start. Then it runs 2 hours to recharge the batteries. So 2 hours of engine time per night to sleep 8 or 10 hour break

 

You only need one cable unless truck has plastic spacer on fifth wheel .. it’s already grounded . I’ve split cables into halves and joined them together to get the length needed one time.

 

Sounds like a Great install job