Brother International S-7200B Service Manual - Page 77

TROUBLESHOOTING, Error code, Possible cause, Err

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13. TROUBLESHOOTING Error code Err 5 (Safety switch operated) Possible cause Is the machine connector inside the control box disconnected? Insert the connector securely. Page 52 Err 6 (Voltage drop) Is the machine head tilted back? Return the machine head to its normal position. Check the operation of the safety switch. 25 3157M 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. 54 Err 7 This is displayed when there is a problem communicating with the operation panel CPU. (Panel communication error) Is the operation panel connector inside the control box disconnected? Insert the connector securely. 52 Err 8 (Over time) Err 9 (Motor overheating abnormally) Err 10 (Solenoid overcurrent) Err 11 (Problem with motor overheating sensor) Problem with operation panel or control box. Replace the operation panel or control box. 49 3154M 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. 39 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. 55 Problem with control P.C. board. Replace the control box. 49 Is connector CN5 inside the motor disconnected? Insert the connector securely. 3116M S-7200B 70

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S-7200B
13. TROUBLESHOOTING
70
Error code
Possible cause
Page
Err
5
(Safety switch
operated)
y
Is the machine connector inside the control
box disconnected?
Insert the connector securely.
y
Is
the
machine head tilted back?
Return the machine head to its normal position.
Check the operation of the safety switch.
52
25
Err
6
(Voltage drop)
y
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.
y
Is the power supply voltage too low?
Check the power supply voltage.
54
Err
7
(Panel
communication
error)
This is displayed when there is a problem communicating with the operation panel
CPU.
y
Is the operation panel connector inside the control box disconnected?
Insert the connector securely.
y
Problem with operation panel or control box.
Replace the operation panel or control box.
52
49
Err
8
(Over time)
y
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.
Err
9
(Motor
overheating
abnormally)
y
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.
y
Problem with motor.
Replace the motor.
39
Err
10
(Solenoid
overcurrent)
y
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.
y
Problem with control P.C. board.
Replace the control box.
55
49
Err
11
(Problem with
motor over-
heating sensor)
y
Is connector CN5 inside the motor disconnected?
Insert the connector securely.
3157M
3154M
3116M