300A screen printer control panel shows "--"how to fix it?

2019-10-28 14:16:55 swprinter 3

300A screen printer control panel shows "--"how to fix it?

As the picture shows:

300A screen printer

The control panel shows "--"

and alarm with sound;

Check the air in or not;

As the picture shows;

300A screen printer

The blue ring is the fast switch;

Move to right is open;

Move to left is close;

Make sure the air is in, then turn on the power;