8. TROUBLESHOOTING

Error code

Possible cause

Page

E701

・ Does the power supply voltage match the control box voltage specifications?

 

Check that the voltage matches.

*

Abnormally high

Check the connection of the 5-pin transformer connector inside the control box.

 

power supply

(220 V AC: P12, 230 V AC: P13)

*

voltage.

・ Is the power supply voltage abnormally high?

 

 

Check the power supply voltage.

**

 

・ Problem with control box.

 

 

Replace the control box.

 

E705

・ Is the power supply voltage abnormally low?

*

Check the power supply voltage.

Abnormally low

Check the connection of the 5-pin transformer connector inside the control box.

 

power supply

(220 V AC: P12, 230 V AC: P13)

**

voltage.

・ Problem with control box.

 

 

Replace the control box.

 

E710

・ Is the electrical equipment connector inside the control box disconnected?

 

Turn off the power switch and then turn the machine pulley by hand and check

*

Motor

that it turns easily.

overcurrent.

・ This is displayed if the machine pulley moves stiffly when it is turned by hand, or if

 

 

the sewing machine locks up and an abnormal current is flowing.

 

 

Turn off the power switch and then turn the machine pulley by hand and check

*

 

that it turns easily.

 

・ This is displayed if there is some problem with the motor and an abnormal current is

 

 

flowing.

 

 

Replace the motor.

**

 

・ Problem with control box.

 

 

 

Replace the control box.

**

 

 

 

 

NOTE:

 

 

 

 

 

 

 

 

 

 

 

 

 

When the power supply voltage is abnormally low, E710 may be displayed

 

 

 

 

 

 

instead of E705.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E790

 

・ This is displayed when there is no power for solenoid, or if the power level is

 

 

 

abnormally low.

 

Problem

with

 

 

Check the connection of the 2-pin transformer connector inside the control box.

*

solenoid

power

・ Problem with main P.C. board or transformer.

 

supply

 

 

 

Replace the control box.

**

 

 

 

 

 

 

 

 

 

 

 

E791

 

・ This is displayed when there is overcurrent in any of the solenoids (thread trimming,

 

 

 

thread wiping, quick reverse or presser lifter).

 

Solenoid

 

 

 

Check the resistances of the solenoids.

*

overcurrent.

・ Problem with main PCB.

 

 

 

 

 

Replace the control box.

**

 

 

 

 

 

 

 

If an error code that is not listed above appears or if carrying out the specified remedy does not solve the problem, contact the place of purchase.

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S-7000DD