Troubleshooting Guide - Bernina L460 Instruction Manual

Troubleshooting Guide

Problem Cause
Irregular Stitch ̶ Incorrect thread tension(s).
̶ Incorrect needle size.
̶ Incorrectly threaded.
̶ Fabric has been pulled.
̶ Loose presser foot.
Needle breakage ̶ Needles are bent, blunt or points are
̶ Fabric has been pulled.
̶ Incorrect needle size.
̶ Incorrect insertion of the needle.
̶ Loose presser foot.
̶ Check the needle system 130/705H.
Unwanted pucker-
̶ Incorrect thread tension(s).
ing
̶ Bent or blunt needle.
̶ Differential feed is set incorrectly.
Unwanted waver-
̶ Differential feed is set incorrectly.
ing
Skipped stitches. ̶ Incorrect needle size.
̶ Incorrectly threaded.
̶ Bent or blunt needle.
̶ Incorrect setting of the needle.
Breaking threads
̶ Incorrectly threaded.
̶ Bent needle.
̶ Thread tension(s) too tight.
̶ Incorrect setting of the needle.
̶ Upper thread is tangled.
Doesn't sew ̶ No power supply
̶ Power and light switch off
̶ Overheating
̶ Sicherheitsanzeige leuchtet (L 460)
38
damaged.
Retractable thread stand is not fully
extended.
Maintenance
Solution
⦁ Adjust the thread tension(s).
⦁
Choose the correct needle size for
thread and fabric.
⦁
Re-thread the machine.
⦁
Do not pull the fabric; guide it gently.
⦁
Attach the presser foot.
⦁
Replace the needles.
⦁ Do not pull the fabric; guide it gently.
⦁ Choose the correct needle size for
thread and fabric.
⦁ Insert the needle to highest position.
⦁ Attach the presser foot.
⦁ Use needles of the system 130/705H or
HAx1.
⦁
Adjust the thread tension(s).
⦁
Insert a new needle to highest position.
⦁
Set the differential feed at less than 1.
⦁
Set differential feed at 1-2.
⦁ Choose the correct needle size for
thread and fabric.
⦁ Re-thread the machine.
⦁ Insert a new needle to highest position.
⦁ Insert the needle to highest position.
⦁
Re-thread in correct order.
⦁
Insert a new needle to highest position.
⦁
Adjust the thread tension(s).
⦁
Insert a new needle to highest position.
⦁
Check if spool threads are running freely.
⦁
Fully extend the retractable thread stand.
⦁ Check the power source.
⦁ Turn on the power and light switch.
⦁ Switch off the machine and let it cool
down for 10-15 minutes.
⦁ Close the looper cover and the sewing
table / lower the presser foot
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