SM 74-5-p3+L Error #15

Dear sir,
Plz see the attachments photo.
Error coad 15 come, machine not run.
Air presser 1714.
Plz help me.

 

defect # 15 is air.
you have to see the air detector and see if the air is entering the machine.
SEK Either a door is open Either the SEK card has a problem.
thank you.

 

Hello,
One gaurd switch is not working properly, I think it is the delevery glass gaurd.
Try to open all machine gaurds one by one and watch the screen, once the SEK error disappeared the gaurd you open is the problem

 

sek input 32 should be zero. Check magnetic read switch (paper removal door, handle door).

 

Thank you. It's now ok boss

 

Thank you so much.