What Does This Sign Mean On The Vectron?

Here it is. Surely it means something is deactivated but what? Electric brakes?(they seem to work fine)

 

Coaches are not powered (electrification for lights, AC and other things), turn on the ZS switch. Expert 101 players may be familiar with this "issue"

 

Train power line. Heating and electric supply to the wagons.

 

... and there I was thinking that this symbol meant the anti-gravity system was disabled