Omron OMNUC W Series Manual page 223

9 Troubleshooting
9
A.40
A.40: Main Circuit DC Voltage Error Detected: Overvoltage
Display and Outputs
Alarm Outputs
Alarm Code Outputs
ALO1 ALO2
OFF OFF
Note OFF: Output transistor is OFF (alarm state). ON: Output transistor is ON.
Status and Remedy for Alarm
During Servomotor
operation
Occurred when main
circuit power turned ON
Cause
A The power supply voltage is not within the
range of specifications.
B
Load exceeds capacity of the Regenerative
Unit.
C Regenerative transistor is abnormal.
D Rectifying diode is defective.
E The Servo Driver is defective.
9-12
ALM Output
ALO3
ON OFF
Occurred when the control
A, B, C, D
circuit power turned ON
A, D
Check power supply.
Check specifications of load inertia and
overhanging load.
Replace the Servo Driver.
E
Remedy