Error #15 SM52

Hello
I need help. I have this error #15 suddenly after a printing. We don’t find where it’s come yet. Somenody can help us please ?

 

this is the error that is displayed on the screen

 

It looks like low air pressure. Do you have enough air on the machine? Check the gauge at feeder.

 

Thanks Mathew.
We always try this but it’s the same message

 

Can you send me a photo from malfunctions menu? Press # bottom to see.

 

Hi sir;

Test the following please;

Blessing

 

hi dear sir, error 15 means a lot of things. can you press the # button and send us the information, as mr Matthew said above. thank you very much