Ahmet,

You are correct that if the screen capture was taken fast it might have caught the pressure gauge as shown.

When you turn off the pumps the pressure goes to zero fast! I know, I've played with the system in the real plane. When the pumps are turned off, even if there is some pressure indication, there is really no work that can be done because as soon as you place a demand on the system the pressure drops to accumulator pressure. The brakes, however have a very large accumulator and you can get a few (one or two) applications of brake in an emergency.

My second point was that the system "B" low pressure lights should NOT be illuminated when the switches are OFF.

I know that the CS model is not 100% faithful to the real plane, but for the most part it is pretty good. Still one of my favorite planes!  :)

Lou