Any ideas on what these should be set at (G0911,G0912)?

What exactly does it affect (I know, "If the A/C pressure is above this value, then turn on fan #1)?

What are the effects if the enable is set very low vs very high?

My fans are (still after many a month) coming on at idle when the AC/Fan is on. I'm wondering if raising the "A/C pressure enable" will keep the fans from coming on until the enable pressure is reached.