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WARNING :
When it is necessary to open the control box containing electrical parts, be sure to turn the power off and wait for ve minutes or more before opening the cover in
order to prevent accident leading to electrical shock. If the work is performed while the power is ON, never touch other than necessary parts.
Trouble Cause (1) Cause (2) Check and corrective measures
From the previous page
13-2) Thread trimming sensor signal
does not enter.
2-A) Connection defective Check the connection of CN72 of the machine head INT board.
2-B) Sensor mounting position is
inadequate.
Check the status that the sensor slit is entering to the thread
trimming position sensor.
2-C) The sensor is out of order. If there is no problem in connections, check the sensor signal
at the input check mode.
If there is no change in the sensor signal, replace the sensor.
14. Error E733 appears. 14-1) The main shaft is vibrating. 1-A) AB-phase signal of the main
shaft motor is not stable.
The coupling that connects the main motor and main shaft is
too far. Re-adjust it to the proper clearance.
Encoder signal of the main shaft motor is not stable. Replace
the main motor.
15. Error E811 appears. 15-1) Power supply voltage is too
high. (AC280V or more)
1-A) The supplying power is high. Check the supplying power.
Change the connection of power supply.
1-B) Detecting circuit is out of order. Replace the SDC board.
16. Error E813 appears. 16-1) Power supply voltage is too
low. (AC160V or less)
1-A) The supplying power is low. Check the supplying power.
Change the connection of power supply.
1-B) Detecting circuit is out of order. Replace the SDC board.
17. Error E901 appears. 17-1) The main motor driving circuit
of SDC board is generating an
error signal.
1-A) IPM heat generation is exces-
sive.
Check the status of connections or the adhesion of dust at
CN33 (fan) of the MAIN board.
1-B) The main motor is out of order. Disconnect CN17 of the SDC board and check the winding
resistance value of main motor.
If there is a problem with the resistance value, replace the
main motor.
1-C) Driving circuit is out of order. Replace the SDC board.
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