Error Codes - JUKI FLS-350N Series Engineer's Manual

8. ERROR CODES

If any error is detected while the machine is in operation, the detector buzzer sounds and the corresponding error
code is given on the display panel. Even when the error code is given, however, there is a case that the error is
simply caused by the disconnection of connector. Be sure to check the error according to the following table.
Error code
8A fuse in control box broken.
Is the power voltage too low?
Is the power supply capacity too small?
Note : It does this display when power supply is turned OFF,
E 1 Is the wire to the motor short-circuited?
Is the sewing machine load torque too high?
E 2 Is the power voltage too high?
Is the sewing machine inertia too high?
E 3 Is the connector to the motor encoder securely inserted?
Are the signals from the motor encoder correct?
Is the sewing machine locked?
Is the motor locked?
E 4 Is the motor connector (4-pin) securely inserted ?
Are the signals from the motor connector (4-pin) correct ?
E 6 Is an extraordinary signal inputted?
(The signal as it repeats ON/OFF at the high frequency.)
Does the noise from outside enter an input signal.
E 8 Is the position detector connector securely inserted?
Are the signals from the detector correct?
(UP/DOWN signal interruption)
E 9 Is the solenoid connection (thread trimming, presser foot lifter, etc.)
short-circuited ?
Is the solenoid wiring short-circuited ?
Probable cause
but this is not an error.
56
− −
Inspection
Replace the 8A fuse.
Check the power voltage.
Check the power supply capacity.
Check the motor wiring.
Check the sewing machine.
Check the power voltage.
Lengthen the deceleration time.
Check the connector insertion.
Check the encoder signals.
Check the sewing machine.
Check the motor.
Check the motor connector insertion.
Check the motor connector.
Check the input signal.
Removes a noise source.
Check the detector connector insertion.
Check the detector UP/DOWN signals.
Check the solenoid wiring.
Replace the solenoid.