Bernina 720 - Page 175

Errors and faults
175
Fault Cause Solution
Needle breaks
The needle is incorrectly inserted. > Insert the needle with the flat side to the back as far up
as it will go into the needle holder and tighten the
screw.
Fabric has been pulled. > Feed the fabric evenly.
Thick fabric has been pushed. > Use a suitable presser foot, e.g.Jeans Foot#8, for thick
fabric.
> Use the height compensating tool when sewing over a
thick seam.
Knotted thread. > Use quality thread.
Display is inactive
Incorrect calibrating data. > Recalibrate the display. (see page60)
The eco Mode is active. > Tap «eco Mode».
Stitch width not adjustable
The selected needle and stitch
plate cannot be used in
combination.
> Replace the needle.
> Replace the stitch plate.
The «Presser foot indicator /
presser foot selection» prevents
the adjustment of the stitch
width.
> Select the fitted presser foot. (see page38)
Speed too low
Unfavorable room temperature. > Place the machine in a warm room one hour before use.
Settings in the Setup Program. > Adjust the sewing speed in the Setup Program.
> Adjust the slide.
The machine doesn't start
Unfavorable room temperature. > Place the machine in a warm room one hour before use.
> Connect the machine and switch it on.
The machine is damaged. > Contact a specialized BERNINA dealer.
The light of the button
«Start-/Stop» doesn't light up
Light is defect. > Contact a specialized BERNINA dealer.
Neither the sewing light nor
the light on the freearm lights
up
Settings in the Setup Program. > Activate it in the Setup Program.
The sewing light is defect. > Contact a specialized BERNINA dealer.
Upper thread monitor doesn't
react
Settings in the Setup Program. > Activate it in the Setup Program.
The upper thread indicator is
defect.
> Contact a specialized BERNINA dealer.