Yaskawa Large Capacity Sigma II Series - Manual (Page 353)

8 Inspection, Maintenance, and Troubleshooting
8.2.1 Troubleshooting Problems with Alarm Displays
8-14
„ A.71
A.71: Overload: High Load
The alarm output, status, and remedy for A.71 are the same as for A.72.
„ A.72
A.72: Overload: Low Load
Display and Outputs
Note: OFF:Output transistor is OFF (alarm state). ON: Output transistor is
ON.
Status and Remedy for Alarm
Alarm Outputs
Alarm Code Outputs ALM Output
ALO1 ALO2 ALO3
ON ON ON OFF
Cause Remedy
A Servomotor wiring incorrect or discon-
nected. Check wiring and connectors at servomotor.
B Load greatly exceeds rated torque. Reduce load torque and moment of inertia.
Otherwise, replace with larger capacity ser-
vomotor.
C Circuit board (1PWB) defective. Replace SERVOPACK.
C A
B
B
At power ON
When servo ON (/S-ON)
signal turned ON
When speed reference
input
During normal
operation
No servomotor
rotation