Bernina 790 PRO Manual page 183

Message on the Display Cause
The bobbin thread is used up.
The bobbin thread has broken.
The main motor is not running.
Incorrect presser foot for the
BERNINA Dual Feed.
The fabric under the presser foot
is too thick.
The contact between the
machine and the embroidery
module is interrupted as a result
of vibrations.
The needle position doesn't
correspond with the center of the
hoop.
Solution
> Rethread.
> Clean the hook.
> Rethread.
> Turn the handwheel clockwise until the needle is at its
top position.
> Remove the sewing project. Do not pull on the fabric or
the thread.
> Remove the stitch plate.
> Remove the thread remnants.
> Clean the hook.
> Remove the hook and make sure that there are no
pieces of broken needle points on the magnetic back of
the hook.
> Insert the hook correctly.
> Fit a presser foot with the designation «D».
> Reduce the fabric thickness.
> Make sure that the embroidery module and the machine
are standing on a stable, even surface.
> Connect the embroidery module to the machine.
> Calibrate the hoop.
Errors and Faults
183