Yaskawa Sigma Mini - Manual (Page 225)

5.2 Error Diagnosis and Troubleshooting
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Status when Alarm Occurred
At power ON
A
,
B
Cause Remedy
A An out-of-range parameter was previously
set or loaded.
Reset all parameters in range. Otherwise,
re-load correct parameters.
B Circuit board (1PWB) defective Replace Servopack.
3. A.10
Display and Outputs
Digital Operator Display Alarm Name Alarm Output
A.10 Overcurrent Output transistor is OFF
(alarm state)
Status when Alarm Occurred
During Servomotor
operation
When servo ON (/S-ON)
signal turned ON
A
,
B
, C, D C,
D
At power ON
C
Cause Remedy
A Wiring grounded between Servopack and
Servomotor.
Check and correct wiring.
B Servomotor phase-U, -V, or -W grounded. Replace Servomotor.
C • Circuit board (1PWB) defective
• Power transistor defective Replace Servopack.
D Current feedback circuit, power transistor,
or circuit board defective.
Replace Servopack.
4. A.31
Display and Outputs
Digital Operator Display Alarm Name Alarm Output
A.31 Position error pulse overflow
(position control only)
Output transistor is OFF
(alarm state)
5