F) Storing; Troubleshooting - Kompernass LERVIA KH 4000 Operating Instructions Manual

Lervia KH 4000

f) Storing

Keep the sewing machine ...
- at a dry location so that no rust forms on
the metal mechanical parts,
- always under the supplied covers to prevent
dust from entering the sewing machine,
- outside the reach of small children or elderly
persons, so that they cannot endanger
themselves through unsupervised operation.
Fault / Problem:
Material is not being moved
through
Needle is breaking
Upper thread is breaking
Lower thread is breaking
Ripples in the material

13. Troubleshooting

If something is not working, you can use the
table below to try and correct the fault. If you
are unable to remedy the problem yourself,
please contact the customer service department
(see warranty card).
Make sure that the sewing machine is switched
off and the plug has been pulled out of the
socket to prevent accidents caused by uninten-
tional switching on.
Check:
Machine is not sewing - is only the
handwheel turning?
Stitch length wheel set to "0"?
Is the contact pressure of the sewing
foot too low?
Needle set incorrectly?
Needle is bent?
Do the needle + thread + material
comply with the table in Chapter 10?
Was it threaded correctly?
Zigzag setting too wide?
Upper thread tension too firm?
Scoring / scratches on the gripper?
Lower thread tension too taut?
Needle set incorrectly?
Was it threaded correctly?
Dust and fluff in the gripper?
Too much tension?
Contact pressure sewing foot too
high?
Do the needle + thread + material
comply with the table in Chapter 10?
- 30 -
Warning:
Possible remedy:
Press in the hadnwheel!
Set it at a value from "1" to "4".
Increase the contact pressure of
the sewing foot!
Set flat end towards the rear!
Insert a new needle.
Select the right needle for the
thread and the material!
It's best to re-thread from the
beginning!
Try with a smaller width!
Select the middle setting.
Replace the gripper.
Reduce the thread tension.
Set flat end towards the rear!
It's best to re-thread from the
beginning!
Clean the gripper area
Reduce the tension!
Reduce the contact pressure!
Select the right needle for the
thread and the material!