JUKI SC-920, Engineer'S Manual, Page: 68 / 75

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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 operat ion is
executed
E003 Disconnection of
synchronizer connector
• When position detection signal is not
input from the sewing machine head syn-
chronizer.
• When the synchronizer has broken.
• Belt is loose.
• Machine head is not proper.
• Motor pulley is not proper.
• Check the synchronizer connector (CN33)
for loose connection and disconnection.
• 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.
• W h e n s e w i n g e x t r a - h e a v y m a t e r i a l
beyond the guarantee of the machine
head.
• When the motor does not run.
• Motor or driver is broken.
• C h e c k w h e t h e r t h e t h r e a d h a s b e e n
entangled 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.
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 Disconnect ion of motor
output connector • Disconnection of motor connector • Check the motor output connector for loose
connection and disconnection.
E072 Overload of motor at the
time of thread trimming mo-
tion • Same as E007 • Same as E007
E220
Grease-up warning • When the predeterm ined number of
stitches has been reached.
• Replenish the specified places with grease
and reset.
(For the details, refer to the data of the ma-
chine head.)
E221
Grease-up error • When the predeterm ined number of
stitches has been reached and the sew-
ing is not possible.
• Replenish the specified places with grease
and reset.
(For the details, refer to the data of the ma-
chine head.)
(1) Error code list (SC-920)