Yaskawa Sigma II Series Servo System - Manual (Page 425)

Sigma II User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
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A.- -
A.- -: Normal Operation
This is not an alarm display.
Display and Outputs
Note: OFF: Output transistor is OFF (alarm state).
ON: Output transistor is ON.
9.2.2 Troubleshooting Problems with No Alarm Display
Use the tables below to identify the cause of a problem that causes no alarm display
and follow the described corrective procedure.
Turn OFF the servo system power supply before starting the shaded procedures.
Contact Yaskawa if the problem cannot be solved by carefully following the
described procedure.
Alarm Outputs
Alarm Code Output
ALM Output
ALO1 ALO2 ALO3
OFF OFF OFF ON