Yaskawa MP940 Reference Manual - Manual (Page 365)

Troubleshooting MotionSuite™ MP940 Machine Controller Reference Manual
10-12
A.41
A.41 is the alarm display for DC undervoltage error. The alarm output
appears below.
Note: The indicates the output transistor is ON; the x indicates the output transistor is OFF
(alarm state).
Status when Alarm Occurred
Alarm Output
Alarm Code Output ALM Output
ALO1 ALO2 ALO3
x x › _ x
Cause Remedy
A The power supply voltage is not within
the range of specifications.
Check power supply voltage.
B Fuse is blown. Replace servo amplifier.
C Rectifying diode defective
D Servo amplifier defective.
Alarm occurs with only
control power ON
D A, B, C
A, B, C
Alarm occurs during motor
operation
Alarm occurs at main
power ON