The slide controller can have 2 power sources. One for the motors and one for the switch.
Your diagram shows power from a battery source, which would be the 30 amp higher current required to operate the slide motors. That power sits at the controller waiting for you to push the retract or extend side of the switch. Your diagram shows the power from the battery source also goes through the switch then to the controller. That’s to direct the power already sitting there through the controller and to the correct side of the motors.
So, what I’m suggesting is that the battery source in the diagram is your 30 amp power and is only connected to the controller to power the motors. The switch power might be from the same 5 amp source as your LP/CO detectors. The switch power probably goes to a relay circuit in the controller only needed to allow the higher current power to route through the controller and to the correct side of the motor. Relays usually only require low current to energize.
Just a theory, but the problem might be an intermittent short in the 5 amp LP/CO circuit or a faulty detector drawing too much current. I too have experienced the issue with a screw driven through a wire, although it was a 120VAC wire, same issue.
__________________
|