JUKI SC-956, Instruction Manual

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Error
code
Description of error Cause Item to be checked
E731 Motor hole sensor fault ・ In the case the motor signal is not
input properly.
・ Check whether the motor signal connector
has loosened or slipped off.
・ Check whether the motor signal cord has
broken by being caught under the machine
head.
・ Check whether the insertion direction of the
motor encoder connector is correct.
E733 Reverse rotation of motor ・ When the motor runs at a speed
of 500 sti/min. or more, the motor
runs in the reverse direction of the
indicated direction of rotation.
・ Check whether the main shaft motor encod-
er wire connection is correct.
・ Check whether the main shaft motor wire
connection for power is correct.
E750 Sewing machine stops ・ In the case the optional-input safe-
ty switch is pressed.
E811 Over-voltage ・ In the case a voltage that is equal
to or more than the guaranteed
voltage is input.
・ In the case a voltage of 200 V is
applied though the voltage is set to
100 V.
・ In the case a voltage of 220 V is
input to the box of "JA: 120 V".
・ In the case a voltage of 400 V is
applied to the box of "CE: 230 V".
・ Check whether the supply voltage of "rated
supply voltage ±10 % or more" is applied.
・ Check whether the 100 V/200 V change-
over connector is set correctly.
In the above-described cases, the power PCB
has broken.
E813 Low voltage
E815 Regenerative resistor is
not connected
・
In the case the regenerative resis-
tor is not connected.
・
Check whether the regenerative resister
is connected to the regenerative resistor
connector (CN11).
E900 Main shaft motor IPM
overcurrent protection ・ Maloperation of the main shaft
motor.
E901 Main shaft motor IPM
overload
E903 85-V power supply fault
・
In the case the 85-V voltage is not
properly output.
・
Check whether the stepping motor is faulty.
・ Check the F2 fuse.
E904 24-V power supply fault ・ In the case the 24-V voltage is not
properly output.
E910 The presser motor origin
retrieval error ・ In the case the presser motor has
failed to return to its origin.
・ Check whether the presser setting is correct
(memory switch No. 23).
・
Check whether the presser motor origin has
been correctly adjusted.
E912 Main shaft motor speed
detection error
E915 Failure of communication
with operation panel ・ In the case communication with the
operation panel cannot be carried
out.
E918 Main shaft temperature
error ・ In the case the temperature of the
CTL PCB is excessively high.
E922 Main shaft control failure ・ In the case the main shaft motor is
out of control.
E924 Motor driver fault ・ In the case the motor driver has
broken.
E946 Machine-head EEPROM
write error ・ In the case the machine head PCB
is not correctly connected.
・ Check whether CN32 has loosened or
come off.