Can you please translate to English?, So I can better help you.
When you turn on a/c, the 30 amp fuse blows?
Is it a manual (lever) or automatic (push button) a.c system?
What fuse is it? I dont show any 30 amp fuses in a/c system
swap the NO2 and no3 fan relay and tell me if it makes a difference
I dont understand.