Errors And Faults; Troubleshooting - Bernina L 890 QUILTERS EDITION User Manual

11 Errors and Faults

11.1 Troubleshooting

Fault
Screen reacts poorly to touch
The stitch is irregular
Needle breaks
Unwanted puckering
Unwanted wavering
Skipped stitches
Cause
The screen is misaligned.
The thread tension is incorrect.
The needle size is incorrect.
Threading is incorrect.
Fabric was pulled.
The presser foot is loose.
Air threader pipes are dirty.
The needle is defective.
Fabric was pulled.
The needle size is incorrect.
The needle insertion is incorrect.
The presser foot is loose.
The needle system is incorrect.
The thread tension is incorrect.
Needles are defective.
The Differential Feed is incorrect.
The Differential Feed is incorrect.
The needle size is incorrect.
Threading is incorrect.
The needle is defective.
The needle insertion is incorrect.
Solution
> Calibrate the screen. (see page 106)
> Adjust the thread tension. (see page 70)
> Match the needle size with the fabric/thread. (see
page 55)
> Rethread the machine. (see page 78)
> Don't pull the fabric; guide it only lightly.
> Attach the presser foot properly. (see page 40)
> Clean the air threader pipes. (see page 108)
> Replace needles. (see page 41)
> Don't pull the fabric; guide it only lightly.
> Match the needle size with the fabric/thread. (see
page 56)
> Replace the needle. (see page 41)
> Attach the presser foot properly. (see page 40)
> Insert needle of the system ELx705 CF or HAx1. (see
page 56)
> Adjust the thread tension. (see page 70)
> Insert a new needle. (see page 41)
> set the Differential Feed to 0.7 − 1. (see page 71)
> set the Differential Feed to 1 − 2. (see page 71)
> Match the needle size with the fabric/thread. (see
page 56)
> Rethread the machine. (see page 78)
> Insert a new needle. (see page 41)
> Insert the needle correctly. (see page 41)
Errors and Faults
109