Brother 888-F50 Operation Manual page 139

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 middle
needle position stitch while the straight stitch needle plate is installed.
This message is displayed when the needle plate is removed with the machine 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