Lifting rear suckers and governed foot not working

Hi,
As of this afternoon my MOZP printing machine is faced with the issue where, the rear suckers don't have suction and the governor foot doesn't blow air.
I checked,

• The pnuematic controllers switch on and off on the DS controller.
• The suction is abit low, it's at 4.

Any suggestions?
Regards,
Charith

 

Fuse on the compressor?

 

check all air lines from the compressor to the feeder head for good connections and or leaks

 

There was a piece of muck stuck in the feeder head, and when we removed head, I realized that piece was jamming the head and that's why the vacuum only coming from the front suckers.
Thank you.