JUKI MO-6904S - Error code list

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7-15.Errorcodelist
No. Descriptionoferrordetected Causeofoccurrenceexpected Itemstobechecked
E000 Execution of data initialization
(This is not the error.)
• When the machine head is changed.
• When the initialization operation is execut-
ed.
E003 Disconnection of synchro-
nizer connector
• When position detection signal is not input
from the sewing machine head synchro-
nizer.
• When the synchronizer has broken.
• Belt is loose.
• Machine head is not proper.
• Motor pulley is not proper.
• Check the synchronizer connector (CN33,
CN43) for loose connection and discon-
nection.
• Check whether the belt is loose.
• Check whether the synchronizer cord has
broken since the cord is caught in the ma-
chine head.
• Check the belt tension.
• Check the setting of the machine head.
• Check the setting of the motor pulley.
E004 Synchronizer lower position
sensor failure
E005 Synchronizer upper position
sensor failure
E007 Overload of motor
• When the machine head is locked.
• When sewing extra-heavy material beyond
the guarantee of the machine head.
• When the motor does not run.
• Motor or driver is broken.
• Check whether the thread has been entan-
gled in the motor pulley.
• Check the motor output connector (4P) for
loose connection and disconnection.
• Check whether there is any holdup when
turning the motor by hand.
E050 The pause switch is
pressed
• The connector of the switch has come off. • Check the connector of the pause switch
for loose connection and disconnection.
E070 Slip of belt
• When the machine head is locked.
• Belt is loose.
• Check whether there is any holdup when
turning the motor by hand.
• Check the belt tension.
E071 Disconnection of motor
output connector
• Disconnection of motor connector • Check the motor output connector for loose
connection and disconnection.
E302 Opening of the cloth plate
is detected.
• The cloth plate is not installed on the table. • Check whether the cloth plate is set on the
table
E333 The material is inserted on
the start sensor.
• Dust on the sensor
• Sensitivity of the sensor
• Dust around the sensor
• Adjustment of the sensitivity of the sensor.
• Setting of the L/D
E334 The material is inserted on
the curve sensor.
E730 Encoder failure
• When the motor signal is not properly
inputted.
• Check the motor signal connector (CN30)
for loose connection and disconnection.
• Check whether the motor signal cord has
broken since the cord is caught in the ma-
chine head.
E731 Motor hole sensor failure
E733 Inverse rotation of motor
• This error occurs when the motor is run-
ning at 500 rpm or more in the opposite di-
rection of that of rotation indication during
motor is running.
• Connection of the encoder of main shaft
motor is wrong.
• Connection for the electric power of main
shaft motor is wrong.
E811 Overvoltage
• When voltage higher than guaranteed one
is inputted.
• 220V has been inputted to SC-510 of 110V
specications.
• 400V is applied to the box of 220V (230V).
• Check whether the applied power voltage
is higher than the rated voltage + (plus)
10% or more.
• Check whether 110V/220V changeover
switch is improperly set.
In the aforementioned cases, POWER p.c.b
is broken.
E813 Low voltage
• When voltage lower than guaranteed one
is inputted.
• 110V has been inputted to SC-510 of 220V
specications.
• 110V is applied to the box of 220V.
• Inner circuit is broken by the applied over-
voltage.
• Check whether the voltage is lower than
the rated voltage – (minus) 10% or less.
• Check whether 110V/220V changeover
switch is improperly set.
• Check whether fuse or regenerative resis-
tance is broken.
E924 Motor driver failure
• Motor driver has broken.