Troubleshooting Guide - Premier MCO-4992 Manual De Instrucciones

TWIN NEEDLE INSTRUCTIONS
1. Set the stitch selector dial to stitches"1,2,or 3"
2. Insert the twin needle in the same way as a single needle.
3. Follow instructions for single needle threading .To thread the left needle ,pass the thread through the
left side of the needle clamp screw. To thread the right needle , pass the thread form the right side of
the needle clamp screw.

Troubleshooting guide

Fault
Upper 1.Incorrect threading;
thread 2.Thread is over tensioned;
breakages 3.Thread is too thick to the needle;
4.Sewing
incorrectly;
5.Defective bobbin;
6.Damaged needle.
Skipped stitch 1.Sewing needle is inserted
incorrectly;
2.Damaged needle.
3.Incorrect size of needle;
4.Improper cooperation of presser
foot;
5.Threading
requirement.
Needle 1.Damaged needle;
breakages 2.Sewing
incorrectly;
3.Incorrect
texture);
4.Improper cooperation of presser
foot;
5.Over tension of thread feeding;
6.It is forbidden to pull the fabric
strongly during operation;
7.Threading
requirement.
Loose stitch 1.Incorrect threading;
(looping 2.Incorrect installation of bobbin
stitches) thread bobbin;
3.Unreasonable adjustment of
stitch length;
P-14
Reason
needle is inserted
didn't follow
needle is inserted
size of needle (for
didn't follow
Correction
1.Re-threading;
2.Reduce tension;
3.Choose a bigger needle;
4.Remove and reinsert the needle;
5.Replace with a better bobbin;
6.Replace with better needle.
1.Change needle and reinsert;
2.Replace with good needle.
3.Choose a needle appropriate to
thread and texture.
4.Check and correct presser foot
configuration.
5.Re-threading according to the
above correct method.
1.Replace with good needle;
2.Insert needle correctly (flat part backwards)
3.Choose appropriate needle;
4.Install presser foot correctly;
5.Adjust appropriate tension;
6.Do not operate like this;
7.Re-threading according to the above
correct method.
1.Check threading;
2.Put bobbin correctly;
3.Choose sewing needle with
right specification;
4. Adjust tension;