YASKAWA SGMAH User Manual page 395

Sigma II User's Manual
A.40
A.40: Main Circuit DC Voltage Error Detected: Overvoltage
Display and Outputs
Status and Remedy for Alarm
During servomotor
operation.
When main circuit
power is turned ON.
Power supply voltage is not within
A
the range of specifications.
Load exceeds capacity of the regen-
B
erative unit.
Malfunctioning regenerative transis-
C
tor.
D Defective rectifying diode.
E Defective servo amplifier.
Alarm Outputs
Alarm Code Output
ALO1 ALO2
OFF OFF
Note: OFF: Output transistor is OFF (alarm state).
ON: Output transistor is ON.
A, B, C, D
A, D
Cause of the Problem
Chapter 9: Inspection, Maintenance, and Troubleshooting
ALM Output
ALO3
ON OFF
When control power
is turned ON.
Solution
Check power supply.
Check specifications of load iner-
tia and overhanging load.
Replace servo amplifier.
9 - 11
E