Bernina 990 - Machine Not Starting; Needle Breaks; Faulty Stitching

Maintenance
15 Troubleshooting 104
The Machine doesn't start
The machine is not connected to the power supply.
►
Insert the mains plug into the socket and into the
machine.
►
Check the socket for power.
Room temperature is too warm or too cold.
►
Place the machine in a warm room one hour before
use.
►
Connect the machine and switch it on.
The machine is damaged.
►
Contact your BERNINA dealer.
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 was pulled.
►
Feed the fabric evenly.
Thick fabric has been pushed.
►
Use a suitable presser foot for thick fabric,
e.g.Jeans Foot#8.
►
Use the height compensation tool when sewing
over a thick seam.
Knotted thread.
►
Use quality thread.
Sewing Light and/or the Light on the Free Arm do not light up
Sewing light and/or light on the free arm not switched
on.
►
Switch on the sewing light and the light on the free
arm in the Settings. [}see page44]
Sewing light and/or free arm light defective.
►
Contact your BERNINA dealer.
Faulty Stitching
Thread remnants between the thread tension discs.
►
Fold a piece of thin material and slide the folded
edge (not the raw edges) between the thread
tension discs.
Incorrectly threaded.
►
Rethread the upper and lower thread.
Thread remnants below the bobbin case spring.
►
Remove the bobbin case.
►
Remove the thread remnants under the spring.
Upper Thread Breaks
Incorrect needle/thread combination.
►
Match the needle with the thread size.
Upper thread is too tight.
►
Reduce the upper thread tension.