TriPac APU

[bdmj989900]

What’s the reason for the APU to shut off when you turn the key on? There is a wire going to the fuse box that is plugged into a “ignition on” spot. So whenever you turn on the key to start the truck the apu will shut off. Can I unplug this wire with no damage to the unit? Would be nice to leave the heater on while truck warms up or just waking up the QC. Any thoughts.

 

[davekc]

It is likely a low voltage cut off switch. It also prevents a overcharge of the batteries as you would have two alternators running.

 

[bdmj989900]

It is likely a low voltage cut off switch. It also prevents a overcharge of the batteries as you would have two alternators running.

Thanks for the response Dave. Guess I'll leave everything as is.

 

[rfields200]

your APU is connected to the trucks cooling system so you would have 2 water pumps working against each other.