Bedienungsanleitung Juki DDL8700B-7 (Seite 50 von 51) (Englisch)

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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 operation is exe-

cuted.

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.

E071 Disconnection of mo-

tor 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 motion

• Same as E007. • Same as E007.

E079 Continuous opera-

tion with the motor

applied with a higher

load

• The machine has been operated with the

motor applied with a load which is higher

than the normal load.

• Check whether the thread has been entan-

gled in the motor pulley.

• Check whether there is any holdup when

turning the motor by hand.

E302 Fall detection switch

failure

(When the safety

switch works)

• When fall detection switch is input in the

state that the power is turned ON.

• Check whether the machine head is tilted

without turning OFF the power switch

(sewing machine operation is prohibited for

safety sake).

E303 Semicircular plate

sensor error

• Semicircular plate sensor signal cannot

be detected.

• Check whether the motor encoder connec-

tor is disconnected.

E499

E704

Data fault • The stored data have broken.

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.

• Check whether the inserting direction of the

motor encoder connector is wrong.

E731 Motor hole sensor

failure

E733 Inverse rotation of

motor

• This error occurs when the motor is run-

ning at 500 sti/min or more in the oppo-

site direction 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.

E799 Thread trimming

operation time-out

• The thread trimmer control operation is

not completed within the predetermined

time period.

E808 Solenoid short circuit • Solenoid power does not become normal

voltage.

• Check whether the machine head cord is

caught in the cover or the like.

E809 Holding motion

failure

• Solenoid is not changed over to holding

motion.

• Check whether the solenoid is abnormally

heated. (CTL circuit board asm. circuit is

broken.)

E810 Solenoid current

abnormality

• Solenoid rare short-circuit. • Solenoid resistance.

E811 Overvoltage • When voltage higher than guaranteed

one is inputted.

• 220V is applied to 120V box.

• CE : 400V is applied to 230V box.

• Check whether the applied power voltage is

higher than the rated voltage + (plus) 10%

or more.

• The power PCB may have broken.

Error code list

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