– 30 –
No.
Description of error detected
Cause of occurrence expected Items to be checked
E000 Execution of data ini-
tialization (This is not the
error.)
• When the machine head is changed.
• When the initialization operation is ex-
ecuted
E003 Disconnection of synchro-
nizer connector
• When position detection signal is not
input from the sewing machine head
synchronizer.
• When the synchronizer has broken.
• Belt is loosened.
• Check the synchronizer connector (CN33)
for loose connection and disconnection.
• Check whether the synchronizer cord has
broken since the cord is caught in the
machine head.
• Tension of the belt
E004 Synchronizer lower posi-
tion sensor failure
E005 Synchronizer upper posi-
tion sensor failure
E007 Overload of motor • When the machine head is locked.
•
When sewing extra-heavy material be-
yond 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.
E303 Woodruff plate sensor error • 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
machine head.
E730 Motor hole sensor failure
E731 Bobbin thread remaining
amount sensor unit failure
E808 Solenoid voltage abnor-
mality
• Short-circuit of solenoid cord • Check that cord is caught in the metallic
section.
E809 Presser lifter solenoid
switch abnormality
• When solenoid, the specication of
which is different is used
• Solenoid resistance
E810 Solenoid current abnor-
mality
• Solenoid rare short-circuit. • Solenoid resistance
E811 Overvoltage • When voltage higher than guaranteed
one is inputted.
• 400V is applied to the box of 220V (230V)
In these cases, there is the possibility that
the power circuit board has broken.
• Check whether the applied power voltage
is higher than the rated voltage + (plus)
10% or more.
• Check whether voltage setting of
220/230/240 V is improperly set.
E813 Low voltage • When voltage lower than guaranteed
one is inputted.
• 110V has been inputted to SC-810 of
220V specications.
• 110V is applied to the box of 220V.
• Inner circuit is broken by the applied
overvoltage
• Check whether the voltage is lower than
the rated voltage – (minus) 10% or less.
• Check whether regenerative resistance
connector (CN11) is disconnected.
• Check whether fuse or regenerative resist-
ance is broken.
E904
Solenoid power abnormality
• Solenoid power protection fuse has
broken.
• Conrmation of solenoid power protection
fuse
(Error indication is displayed only for
approximately 0.5 second immediately
after turning ON the power.)
E906 Operation panel transmis-
sion failure
• Disconnection of operation panel cord
• Operation panel has broken.
• Check the operation panel connector
(CN38) for loose connection and discon-
nection.
• Check whether the operation panel cord
has broken since the cord is caught in the
machine head.
E924 Encoder failure • Motor driver has broken.
• Motor overload operation • Motor driver heat is excessive.
Error code list
WARNING :
To prevent personal injuries caused by electric shock hazards or abrupt start of the sewing machine,
removethecoverafterturningOFFthepowerswitchandalapseof5minutesormore,andconrm
the trouble to manage.
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