Troubleshooting
72
2020-09 EN 5220105.00A.04
Fault
Cause
Solution
Upper thread breaks
Incorrect needle/thread
combination.
> Match the needle with the thread size.
Upper thread is too tight.
> Reduce the upper thread tension.
Incorrectly threaded.
> Rethread.
Poor quality thread.
> Use quality thread.
The stitch plate or the hook tip is
damaged.
> Contact a specialized bernette dealer to have the
damages repaired.
> Replace the stitch plate.
Lower thread breaks
The bobbin is not inserted
correctly.
> Remove and reinsert the bobbin and pull on the thread.
– The thread should run easily.
The bobbin is wound incorrectly.
> Check bobbin and thread correctly.
The stitch hole in the stitch plate
is damaged.
> Contact a specialized bernette dealer to have the
damages repaired.
> Replace the stitch plate.
Needle blunt or bent.
> Replace the needle.
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.
The fabric has been pulled.
> Feed the fabric evenly.
Thick fabric has been pushed.
> Use a presser foot that is suitable for thick fabric.
> Use the height compensating tool when sewing over a
thick seam.
The thread is knotted.
> Use quality thread.
The machine doesn't start
The machine is switched off.
> Switch the machine on.
The machine is not plugged in.
> Plug in the power plug.
The machine is defective.
> Contact a specialist bernette dealer.
Unfavorable room temperature.
> Place the machine in a warm room one hour before use.
> Connect the machine and switch it on.
The presser foot is raised.
> Lower the presser foot.
Neither the sewing light nor
the light on the free arm
lights up
The sewing light is defective.
> Contact a specialist bernette dealer.
