Operation Manual

35
TROUBLESHOOTING GUIDE
Problem Cause Correction
Upper thread
breaks
1.The machine is not threaded correctly
2.The thread tension is too tight
3.The thread is too thick for the needle
4.The needle is not inserted correctly
5.The thread is wound around the spool
holder pin
6.The needle is damaged
1. Rethread the machine
2. Reduce the thread tension (lower number)
3. Select a larger needle
4. Remove and reinsert the needle (À at side
towards the back)
5. Remove the spool and thread again
6. Replace the needle
Lower thread
breaks
1.The bobbin case is not inserted cor-
rectly
2.The bobbin case is threaded incorrectly
3.The lower thread tension is too tight
1. Remove and reinsert the bobbin case and
pull on the thread. The thread should pull
easily
2. Check both bobbin and bobbin case
3. Loosen lower thread tension as described
Skipped
stitches
1.The needle is not inserted correctly
2.The needle is damaged
3.The wrong size needle has been used
4.The foot is not attached correctly
1. Remove and reinsert needle (À at side
towards the back)
2. Insert a new needle
3. Choose a needle to suit the thread and
fabric
4. Check and attach correctly
Needle
breaks
1.The needle is damaged
2.The needle is not correctly inserted
3.Wrong needle size for the fabric
4.The wrong foot is attached
1. Insert a new needle
2. Insert the needle correctly (À at side to-
wards the back)
3. Choose a needle to suit the thread and
fabric
4. Select the correct foot
Loose
stitches
1.The machine is not correctly threaded
2.The bobbin case is not correctly
threaded
3.Needle/ fabric/ thread combination is
wrong
4.Thread tension wrong
1. Check the threading
2. Thread the bobbin case as illustrated
3. The needle size must suit the fabric and
thread
4. Correct the thread tension
Seams gather
or pucker
1.The needle is too thick for the fabric
2.The stitch length is wrongly adjusted
3.The thread tension is too tight
1. Select a ¿ ner needle
2. Shorten the stitch length
3. Loosen the thread tension
Uneven
stitches,
uneven feed
1.Poor quality thread
2.The bobbin case is wrongly threaded
3.Fabric has been pulled
1. Select a better quality thread
2. Remove bobbin case and rethread and
insert correctly
3. Do not pull on the fabric while sewing, let it
be fed by the feed dogs
The machine
is noisy
1.The machine must be lubricated
2.Fluff or oil have collected on the hook or
needle bar
3.Poor quality oil has been used
4.The needle is damaged
1. Lubricate as described
2. Clean the hook and feed dog as described
3. Only use good quality sewing machine oil
4. Replace the needle
The machine
jams
Thread is caught in the hook Remove the upper thread and bobbin case,
turn the handwheel backwards and forwards
by hand and remove the thread pieces.
Lubricate as described
Intellectual Property
VIKING, KEEPING THE WORLD SEWING & design and H|CLASS, are trademarks of
KSIN Luxembourg II, S.ar.l. HUSQVARNA and the “crowned H-mark” are trademarks of
Husqvarna AB. All trademarks are used under license by VSM Group AB.