Brother S-7200B Instruction Manual page 71

Error code
Is solenoid fuse F2 (5A) blown?
Err 12
(Solenoid power
supply error)
Problem with control P.C. board.
Err 13 Is the treadle unit connector inside the control
box disconnected?
(Treadle unit
error)
Is there an open circuit in the treadle
connector harness?
Err 14 Problem with head detector unit
(Head detector
unit error)
Problem with motor.
Err 15
(Problem with
Problem with power P.C. board.
sewing machine
motor operation)
Err 16 This is displayed if the sewing machine motor locks during thread trimming.
(Thread trimming
solenoid timeout)
Err 18 This is displayed if data could not be correctly read from or written to the memory
element on the control P. C. board.
(EEROM error)
Err 19 This is displayed when the control box becomes abnormally hot. (Three-phase
high-voltage specifications only)
(Control box
overheating)
The settings in "Setting method for standard depression stroke" may be incorrect.
Err 20
(Treadle pedal
Problem with treadle unit.
position error)
Replace the fuse.
Replace the control box.
Insert the connector securely.
Replace the treadle unit.
Check that the head detector unit
connector inside the control box is
securely inserted.
Replace the head detector unit.
Replace the motor.
Replace the control box.
Remove any thread scraps that may be blocking the motor.
Check that there are no problems with the thread trimming mechanism.
Replace the control box.
Check that there are no problems with the cooling fan.
If there is a problem, replace the cooling fan.
Redo the settings in "Setting method for standard depression stroke".
Replace the treadle unit.
Possible cause
S-7200B
14. TROUBLESHOOTING
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3702M
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