Well documented! I have to get to a 'thing' right now, but I will review all the data. You did a good job and this should help. If your cab was not cool, that compressor should not be cycling. I don't like it's pressures but it does have some subcooling.
As for the water, I think it is unrelated and there is a drip pan inside and I think the tubes are projected up, not flush with the bottom of the pan, so the pan can hold water. this may explain no water coming from unit, and water in the vents as the water level comes up where the blower fins can contact it.
Either way, it seems pretty obvious that the cover of the unit in the cab has to come off the figure that one out. may find other issues there as well. I want to know why it is cycling.
As for the water, I think it is unrelated and there is a drip pan inside and I think the tubes are projected up, not flush with the bottom of the pan, so the pan can hold water. this may explain no water coming from unit, and water in the vents as the water level comes up where the blower fins can contact it.
Either way, it seems pretty obvious that the cover of the unit in the cab has to come off the figure that one out. may find other issues there as well. I want to know why it is cycling.