The power system works by extending a lift rod mounted externally next to the CoolCat and Water Fill. Look closely at the picture Here
and you can see it.
After parking / stabilizing / and everything you do to any trailer the first step in "raising the roof" is to undo the two side latches just like on any other A-Frame.
Next, there is a switch on the outside, beside the door, for the power lift.
Note: My dealer recommended manually pushing up on the front roof section slightly to get it "loose" before using the power lift. I take tips like this one from service techs seriously as it can save me money later.
When you raise the roof it is being lifted from the rear section and it does go all the way up and "lock" in place. After it reaches the top of the front section the jacking arm is fully extended so it does automatically shut off as such.
When lower the roof you give the front section a push, using the handle to break it loose. After that using the power lift, in Down Mode, pulls down the front down with the "bungee cords" just like on a non-powered roof.
Couple of tips:
To lock the roof down for transport use one arm to apply downward pressure, leaning on the roof, while closing the latch with your other hand.
I keep a microfiber towel handy to wipe off the support rods before lowering the roof. That way no excess dirt, water, or other crude is forced in to the units. I suspect the power lift unit won't be cheap to replace...
As I mentioned in another post the power lift unit has an in-line fuse collocated in the CoolCat compartment.
If the unit should fail while on a trip I was advised to remove it using the pivot nuts at the top and bottom mounts. You will also need to disconnect the wiring harness, at the fuse, to take the unit off the trailer.