NSK M-EGA-15A2301, User Manual

Page: 209 / 237

8.Maintenance Trouble shooting when alarm activated
8-19
■
Alarm Code A3 (Serial Encoder Internal Error 3)
Status at the time of alarm
Cause
1 2 3
Issued when power supply control is turned ON.
✔ ✔
Issued while stopping the motor.
✔ ✔
Issued while rotating the motor.
✔ ✔ ✔
◆
Corrective actions
Cause Investigation and corrective actions
1
■
Defect in internal circuit of converter.
■
Turn ON the power supplies again; if not
restored, replace the converter.
2
■
Malfunction due to noise.
■
Confirm proper grounding of the driver.
■
Add ferrite core or similar
countermeasures against noise.
3
■
Number of motor rotations exceeds
the permitted velocity.
■
Check the operation condition and
reduce the maximum number of
rotations.
■
Alarm Code A4 (Serial Encoder Internal Error 4 )
■
Alarm Code AA (Serial Encoder Internal Error 10)
■
Alarm Code AC to AF (Serial Encoder Internal Error 12 to 15)
Status at the time of alarm
Cause
1
2
Issued when power supply control is turned ON.
✔
Issued during operation.
✔
✔
◆
Corrective actions
Cause Investigation and corrective actions
1
■
Defect in internal circuit of converter.
■
Turn ON the power supplies again; if not
restored, replace the converter.
2
■
Malfunction due to noise.
■
Confirm proper grounding of the driver.
■
Add ferrite core or similar
countermeasures against noise.