Operating instructions

35. Troubleshooting
Error description Possible cause Error remedy
The automatic sewing
machine does not start
A symbol, which gives the
possible cause appears in the
display.
Adjacent symbol in the display
The needle is not at the upper
dead center.
Turn the handwheel in the direction
of rotation so that the needle is at
the upper dead center.
With frequent repetition of the
message, the proximity switches
must be adjusted anew (see
Chapter “Setting the Upper Dead
Center” and “Setting of the Upper
Dead Center for the Sewing Drive”)
Adjacent symbol in the display
Before the start of sewing, the
needle is in front of the wrong
needle entry point
Correct position before the
beginning of sewing:
With subclass -121, -141,-151:
The needle lies in front of the
left needle entry point
With subclass -112
The needle is in front of the right
needle entry point.
Turn the handwheel in the direction
of rotation so that the needle is in
front of the correct needle entry
point.
With frequent repetition of the
message, the proximity switches
must be adjusted anew (see
Chapter “Setting the Upper Dead
Center” and “Setting of the Upper
Dead Center for the Sewing Drive”)
Adjacent symbol in the display
The machine was stopped
during the sewing cycle and
then the handwheel was turned.
Turn the machine off at the main
switch and then on again after a
short waiting period
The air pressure for the
pneumatic component is too
low.
- Check the air pressure at the
pressure gauge
- Was the air pressure hose
connected
- Check air pressure
fluctuations
- Check all air pressure hoses and
air pressure connections
Safe Stop is turned on.
Turn the Safe Stop off.
An error message with error
number is shown in the control
panel.
The error remedy is described in
the Service Instructions under
“Error Messages”
Missing stitches The needle is blunt, bent or not
correctly inserted in the needle
bar.
Insert a new needle
Insert the needle correctly in the
needle bar.
The threading of the needle and
looper threads was not done
correctly.
Check the threading path of the
needle and looper threads.
(see Operating Instructions
“Threadung the Needle Thread”
and “Threading the Looper
Thread”)
Yarn stand is mounted
incorrectly
Check the yarn stand (see
Installation Instructions “Mounting
the Yarn Stand”)
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