Thanks all for your feedback!
I have investigated deper and have done those thinks:
Chassi 1 BIOS : 1,69 -> 1,70 = ok
Chassi 2 BIOS : 1,69 -> 1,70 = ok
Chassi 1 ESM/BMC : 1,29 -> 1,30 = ok
Chassi 2 ESM/BMC : 1,29 -> 1,30 = ok
Chassi 1 PIC/FBC : 1,16 -> 1,18 -> 1,20 = ok
Chassi 2 PIC/FBC ...