A.71, A.72, Display and outputs – Yaskawa MP940 User Manual
Page 379: Status and remedy for alarm
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