YASKAWA SGMAH - Troubleshooting; Troubleshooting Problems with Alarm Displays

Sigma II User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
9 - 5
9.2 Troubleshooting
This section describes causes and remedies for problems which generate an alarm display
and for problems which result in no alarm display.
9.2.1 Troubleshooting Problems with Alarm Displays
Problems that occur in the servodrives are displayed on the panel operator as
“A.
” or “CPF”. Refer to the following sections to identify the cause of an
alarm and the action to be taken.
Contact Yaskawa if the problem has not been solved after following the described
procedures.
Note: “A.- -: Normal Operation”, is not an alarm. Additional information appears on 38.
 A.02
A.02: Parameter Breakdown
Display and Outputs
Note: OFF: Output transistor is OFF (alarm state).
Status and Remedy for Alarm
Alarm Outputs
Alarm Code Output
ALM Output
ALO1 ALO2 ALO3
OFF OFF OFF OFF
Cause of the Problem Solution
A
Power turned OFF during param-
eter write. Alarm occurred at next
power ON.
• Initialize parameters using
Fn005 then reenter settings .
• Replace the servo amplifier.
B Circuit board (1PWB) defective. Replace the servo amplifier.
At power ON.
A, B