Yaskawa Large Capacity Sigma II Series - Manual (Page 351)

8 Inspection, Maintenance, and Troubleshooting
8.2.1 Troubleshooting Problems with Alarm Displays
8-12
„ A.41
A.41: Main Circuit DC Voltage Error Detected: Undervoltage
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
OFF OFF ON OFF
Cause Remedy
A The power supply voltage is not within the
range of specifications. Check power supply voltage.
B Fuse blown. Replace SERVOPACK.
C Rectifying diode defective.
D SERVOPACK defective.
D A, B, C
A, B, C
Occurred when the
control power turned ON. During servomotor
operation
Occurred when main
circuit power turned ON.