PS5 Bernina Route

On PS5 with a keyboard connected is there a key for acknowledging the ZSI alarm? There is a button on the loco dash but I prefer to do most things by the keyboard. I tried pagedown key on the keyboard as that is used for acknowledging pzb on German loco's but this doesn't work.
Thanks.

 

Q. Q is also used to acknowledge sifa, aws, dsd, vigilance devices sort of thing

 

I tried Q. It acknowledges the SISTE vigilance system but not the ZSI alerter. On the HUD it is the traffic light symbols. So yellow light comes on then red and emergency brakes are applied if not acknowledged.

 

After playing a bit more of the route I think I've got the hang of the safety systems. Q key does acknowledge both SISTE and ZS alerters. When the yellow traffic light on the HUD flashes twice I had to press Q a few times to acknowledge the ZS alerter as the yellow traffic light flashed a few times before clearing.

 

Believe you only need to acknowledge the short beep/light. The long one seems to serve as a reminder only.

 

The Q key acknowledges both with ZSI you must keep pressing the Q key until you pass the signal.

 

Thanks. I found that out last night getting to know the route more. Another learning curve.