Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Manual (Page 279)

9 Troubleshooting
9.1.2 Troubleshooting of Alarms
9-14
A.860:
Encoder Overheated
(Only when an absolute
encoder is connected.)
(Detected on the encoder
side.)
The ambient operating tempera-
ture around the servomotor is too
high.
Measure the ambient operating tem-
perature around the servomotor.
Reduce the ambient operating tem-
perature of the servomotor to 40
°C
or less.
The servomotor load is greater
than the rated load. Check the accumulated load ratio
monitor (Un009) to see the load.
Operate the SERVOPACK so that
the motor load remains within the
specified range.
An encoder fault occurred. −
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the servomotor may be
faulty. Replace the servomotor.
A SERVOPACK fault occurred. −
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.8A0 *2 :
External Encoder
Error of Scale
Setting of the zero point position
of absolute external encoder
failed because the servomotor
rotated.
Before setting the zero point posi-
tion, use the fully-closed feedback
counter monitor (Un00E) to con-
firm that the servomotor is not rotat-
ing.
The servomotor must be stopped
while setting the zero point posi-
tion.
An external encoder fault
occurred.
− Replace the external encoder.
A.8A1 *2 :
External Encoder
Error of Module
An external encoder fault
occurred.
− Replace the external encoder.
A serial converter unit fault
occurred.
− Replace the serial converter unit.
A.8A2 *2 :
External Encoder
Error of Sensor
(Incremental)
An external encoder fault
occurred.
− Replace the external encoder.
A.8A3
*2
:
External Encoder
Error of Position
(Absolute)
An absolute external encoder
fault occurred.
−
The absolute external encoder may
be faulty. Refer to the encoder man-
ufacture’s instruction manual for
corrective actions.
A.8A5 *2 :
Encoder Overspeed
The overspeed from the external
encoder occurred.
− Replace the external encoder.
A.8A6 *2 :
Encoder Overheated
The overheat from the external
encoder occurred.
− Replace the external encoder.
A.b31:
Current Detection
Error 1
(Phase-U)
The current detection circuit for
phase U is faulty.
−
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.b32:
Current Detection
Error 2
(Phase-V)
The current detection circuit for
phase V is faulty.
−
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.b33:
Current Detection
Error 3
(Current detector)
The detection circuit for the cur-
rent is faulty.
−
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
The servomotor main circuit
cable is disconnected. Check for disconnection of the
motor main circuit cable.
Correct the servomotor wiring.
A.bF0:
System Alarm 0
A SERVOPACK fault occurred. −
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
∗2. This alarm may occur when a fully-closed option module is mounted.
(cont’d)
Alarm:
Alarm Name
Cause Investigative Actions Corrective Actions