S-series PacketShaper is in "Hang State" and there is no Management Access to the unit, not even via Console.

If S-series PacketShaper is in "Hang State" , with no management access, then connect Serial cable directly to the unit and from console you should be able to  'Ctrl+\' , which  should release and refresh any hung console sessions.  

Note:  Rebooting the S-series will get back the Management access, but if you want to generate "Core Files" for the Engineering team to investigate the cause, then the core- dump data will be overwritten with the reboot.