Yaskawa MP940 - Manual (Page 379)

SERVOPACK Inspection, Maintenance, and Troubleshooting
10.2.1 Troubleshooting Problems with Alarm Displays
10-12
„ 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 dis-
connected. Check wiring and connectors at servomotor.
B Load greatly exceeds rated torque. Reduce load torque and inertia. Otherwise,
replace with larger capacity servomotor.
C Circuit board (1PWB) defective. Replace SERVOPACK.
C A
B
B
When servo ON (/S-
ON) signal turned ON
When speed reference
input
No servomotor
rotation
During normal
operation
At power ON