Brother S-7200B Instruction Manual page 70

14. TROUBLESHOOTING
Error code
Err 5
(Safety switch
operated)
Err 6
(Voltage drop)
Err 7 This is displayed when there is a problem communicating with the operation panel
CPU.
(Panel
communication
error)
Err 8
(Over time)
Err 9
(Motor
overheating
abnormally)
Err 10
(Solenoid
overcurrent)
Err 11
(Problem with
motor over-
heating sensor)
63
Is the machine connector inside the control
box disconnected?
Insert the connector securely.
the
Is machine head tilted back?
Return the machine head to its normal position.
Check the operation of the safety switch.
Was the power turned on while the treadle was still depressed?
Return the treadle to the neutral position, and then turn on the power switch.
Is the power supply voltage too low?
Check the power supply voltage.
Is the operation panel connector inside the control box disconnected?
Insert the connector securely.
Problem with operation panel or control box.
Replace the operation panel or control box.
This appears on the display when the sewing machine has been operating
continuously for 3 minutes or more.
Turn the power switch off and then back on again, and then operate the
sewing machine normally.
This is displayed when the motor becomes abnormally hot and the temperature
protection has activated.
After the temperature has dropped, turn the power switch back on and operate
the sewing machine as normal.
Problem with motor.
Replace the motor.
This is displayed when there is overcurrent in any of the solenoids (thread trimming,
thread wiping, quick reverse or presser lifter).
Check the resistances of the solenoids.
Problem with control P.C. board.
Replace the control box.
Is connector CN5 inside the motor disconnected?
Insert the connector securely.
Possible cause
S-7200B
Page
10*
49*
3157M
*
*
**
3154M
**
**
**
*
3116M