R700 fails when speed 6000sh/h

Our R700 machine is having an error: when it runs up at 6000sh/h, Input paper stop machine.
It's okay to run at 5900sh/h
Has anyone ever made such a mistake? Thank you.

 

what is your machine series and the error displayed on the screen?

 

Check how this valve works.

 

The machine's serial number is: 723
The paper misalignment error display after the input paper supply suction is cut off

 

Thank you, I'll check this valve again.

 

We found the cause, due to valve error Y002 at the paper input

Thank you all for your support.