TriPac APU not cranking

Hmmm maybe the starter is gone on it, test your starter

 

did you find the toggle switch that is underneath the engine cover? And is it in the on position?

 

So I had my APU serviced yesterday along with the truck, got to the truck stop this afternoon, went to flip it on, and got the en9 code. Went outside reset the fuse block, nothing, then went out to flip the toggle switch from on to off and back on again, and when I touched the box it was very hot. Tried resetting all switches and nothing. Any thoughts as to why it would be so hot? And why the en9 code?

 

The En9 code means the run circuit is dead while the run relay is energized, normally because the reset switch is tripped. The reset switch trips because of one of two things: low oil pressure or high coolant temperature.

The En9 code will stay on even after the reset switch is reset until the controller is turned off and back on.

Normally, the mechanic will turn off the toggle switch to service the unit, then you have to flip it back on, then reset the reset switch, then turn the controller off then back on. That should clear the En9 code, allowing the engine to start when the run relay is energized.

 

So dummy me, turns out the regen rocker button was turned off. Lol. Mechanic flipped it on and the darn thing fired right up. Rofl.

 

i have issue engine wont crank at all turn control panel on to start in any configuration bout 30 sec hear a click under bunk then a few sec later throws breaker on side of box under bunk, had this unit 4 years never failed to crank till now, oil full, coolant full, belts good, on/off switch on and good, no blown fuses i can find