Troubleshooting

Fault

Possible Cause

Troubleshooting

Uneven Stitch Formation

Upper thread too tight or too loose.

  1. Adjust the upper thread tension. Adjusting the Upper Thread Tension

Needle blunt or bent.

  1. Replace the needle, make sure that a new BERNINA quality needle is used. Changing the Needle

Poor quality needle.

  1. Use a new needle.

Poor quality thread.

  1. Use quality thread.

Incorrect needle/thread combination.

  1. Match the needle with the thread size.

Incorrectly threaded.

  1. Rethread.

Fabric was pulled.

  1. Feed the fabric evenly.

Dust or thread remnants under the tension spring of the bobbin case.

  1. Cleaning the bobbin case. Cleaning the Bobbin Case

Skipped Stitches

Incorrect needle.

  1. Use needles from the needle system HLx5. Overview Needles

Needle blunt or bent.

  1. Replace the needle. Changing the Needle

Poor quality needle.

  1. Use a new needle.

The needle is incorrectly inserted.

  1. Insert the needle with the flat side to the right as far up as it will go and tighten the screw.

Incorrect needle point.

  1. Match the needle point to the texture of the material.

Light on the button "Bobbin Winder" does not light up

Lighting Defective.

  1. Contact your bernette dealer.

Light on the button "Needle Stop Up/Down" does not light up

Lighting Defective.

  1. Contact your bernette dealer.

Needle Breaks

The needle is incorrectly inserted.

  1. Insert the needle with the flat side to the right as far up as it will go and tighten the screw. Changing the Needle

Fabric was pulled.

  1. Feed the fabric evenly.

Thick fabric has been pushed.

  1. Use a suitable presser foot for thick fabric, e.g.  roller foot.
  2. Use the height compensation tool (optional accessory) when sewing over a thick seam. Sewing thick Areas using the Height Compensation Tool

Knotted thread.

  1. Use quality thread.

Upper Thread Breaks

Incorrect needle/thread combination.

  1. Match the needle with the thread size.

Upper thread is too tight.

  1. Reduce the upper thread tension. Adjusting the Upper Thread Tension

Incorrectly threaded.

  1. Rethread.

Poor quality thread.

  1. Use quality thread.

The hook tip or the stitch hole in the stitch plate is damaged.

  1. Replace the stitch plate.
  2. Contact your bernette dealer.

Lower Thread Breaks

The bobbin is not inserted correctly.

  1. Remove and reinsert the bobbin and pull on the thread.
  2. The thread should run easily.

The bobbin is wound incorrectly.

  1. Check the bobbin and wind it correctly. Winding the Bobbin Thread

The stitch hole in the stitch plate is damaged.

  1. Replace the stitch plate.
  2. Contact your bernette dealer.

Needle blunt or bent.

  1. Replace the needle.

Faulty Stitching

Thread remnants in the thread pretension.

  1. Fold a piece of thin fabric (don't use outer edges) and pull it through the thread tension discs several times.

Incorrectly threaded.

  1. Rethread.

Thread is caught in the hook.

  1. Remove the upper thread and the bobbin case, turn the handwheel backwards and forwards by hand and remove the thread remnants.

Incorrect needle/thread combination.

  1. Match the needle with the thread size.

Thread is not cut

Thread is too thick.

  1. Cut the thread manually.

The Machine doesn't Start

The machine is switched off.

  1. Switch the machine on. Switching the Machine On

The machine is not connected to the power supply.

  1. Connect the machine or plug in the power cable. Connecting the Machine and Foot Control

The machine is defective.

  1. Contact the specialized bernette dealer.

Unfavorable room temperature.

  1. Place the machine in a warm room one hour before use.
  2. Connect the machine and switch it on.

The presser foot is raised.

  1. Lower the presser foot. Raising/Lowering the Presser Foot

Foot control is not connected.

  1. Connect the foot control. Connecting the Machine and Foot Control