Brother Innov-is NV1100 Operation Manual page 140

Error Messages
12
13
14 F**
This message is displayed when the motor locks due to tangled thread or for other
reasons related to thread delivery.
This message is displayed when you try to sew with a stitch other than a straight
stitch (middle needle position) while the straight stitch needle plate is installed.
This message is also displayed when the needle plate is removed while the machine
is still turned on.
If error message "F**" appears in the LCD while the machine is being used, the
machine may be malfunctioning.
Contact your nearest Brother authorized service center.
Troubleshooting
Cause/Solution
Appendix A-19
A