110824
Fault 5:
The motor keeps running by itself when the power is turned ON.
Check if parameter M is set correctly. When parameter M is set to 1 but NO synchro is used the
motor will start to run automatically when the power is turned ON. For use WITHOUT synchro
parameter M must be set to 0.
If parameter M is set correctly, check if the position of the magnet on the end of the swinging
arm inside the speed control unit is good. This magnet moves across a Hall sensor on the
electronic board to vary the motor speed. Do this the following way:
1. turn OFF the power of the control box
2. open the plastic cover of the speed control unit and loosen the bolt of the swinging arm.
3. move the swinging arm in the position of picture 6
4. turn ON the power of the control box, take care not to touch the electronic components on
the electronic board.
5. move the swinging arm back in the direction of picture 7, first the speed will go up but as
soon as the magnet goes over the Hall sensor the speed will go down again.
6. At the point where the motor stops running, secure the bolt of the swinging arm.
7. put the cover of the speed control unit back in the original position and secure the screws of
the cover.
Picture 6
Picture 7
swinging arm
Hall sensor
bolt of the swinging arm
Fault 6:
The display shows “E1”
“E1” means the motor has an operational failure, check if the sewing material is too heavy, the
machine is stuck or some other reason that makes the load heavier. Also check if all plugs are
connected properly and check the pins inside the plugs (pin drawn back).
Fault 7:
The display shows “E2”
“E2” means the motor has an over-current or under-voltage failure. Check if the power supply if
the range is within 200-240 Volts.
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
