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I don't know what to do.
Each time when i try print with ABS i get large warping at the bottom side.
I tried print with 80 , 90 , 100 C. But second fan prevents set temp higher 80 C

You do not typically want to run a part cooling (layer) fan with ABS. The accelerated cooling rate makes the warping worse.

And ABS will always be a challenge to prevent warping. Large flat parts are the hardest to manage. ABS shrinks as it cools, so putting a fresh hot layer on a cooler layer results in a curling force.