A.40, Display and outputs, Status and remedy for alarm – Yaskawa Sigma II Series Servo System User Manual
Page 399
Sigma II User’s Manual
Chapter 9: Inspection, Maintenance, and Troubleshooting
9 - 11
A.40
A.40: Main Circuit DC Voltage Error Detected: Overvoltage
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
Power supply voltage is not within
the range of specifications.
Check power supply.
B
Load exceeds capacity of the regen-
erative unit.
Check specifications of load iner-
tia and overhanging load.
C
Malfunctioning regenerative transis-
tor.
Replace servo amplifier.
D
Defective rectifying diode.
E
Defective servo amplifier.
A, B, C, D
E
A, D
During servomotor
operation.
When main circuit
power is turned ON.
When control power
is turned ON.