Sigma II User’s Manual
Chapter 9: Inspection, Maintenance, and Troubleshooting
9 - 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 Output
ALM Output
ALO1
ALO2
ALO3
OFF
OFF
ON
OFF
Cause of the Problem
Solution
A
The power supply voltage
exceeds specified range.
Check power supply voltage.
B
Fuse blown.
Replace servo amplifier.
C
Defective rectifying diode.
D
Defective servo amplifier.
A, B, C
D
A, B, C
During servomotor
operation.
When main circuit
power is turned ON.
When control power
is turned ON.
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