This thing has a few computers and it is normal for computer controlled machines to show some draw on the battery when the ignition is off, the drain is not so much that it will make a good battery dead over a week. why are you looking at that? (what prompted your concern and have you load tested the battery)
I think if you get the operators manual, you will find that the "hydraulic interlock" is from no one in the seat (no operator presence detected) and the hydraulic controls are correctly locked out.
does the machine run?
code 190-8 is a crank-cam synchronization error (did anyone change the timing belt?) is this code one you see in the dash if you sit on the seat, or is this a "historical" code that was never cleared? or is this a code you introduced while checking and disconnecting plugs?
522593-12 is the electronic pressure regulator unplugged
522766-4 is Ignition 3 Relay (RL1) Driver Output Out Of Range Low