APPENDIX
149
5
• This machine is equipped with a thread
detecting mechanism. If the machine is not
threaded with the upper thread, the machine
will not operate correctly, even if the “Start/
Stop” button is pressed after unlocking the
machine.
• If the machine suddenly stops:
• Turn off the machine, and unplug the
power cord.
• Restart the machine with the correct
operating procedure. (page 22)