Yaskawa MP940 Reference Manual - Manual (Page 370)

MotionSuite™ MP940 Machine Controller Reference Manual Troubleshooting
10-17
A.7A
A.7A is the heat sink overheat alarm display. 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
Note: This alarm display occurs only in 30W ~ 1000W servo amplifiers.
Alarm Output
Alarm Code Output ALM Output
ALO1 ALO2 ALO3
x
Cause Remedy
A The ambient temperature of the
servo amplifier exceeds 55ºC. Lower the ambient temperature to
below 55ºC.
B Poor airflow around heat sink. Make the mounting, peripheral
space as per manual.
C Fan stopped. Replace servo amplifier.
D Running above rated load. Lighten load.
E Servo amplifier defective. Replace servo amplifier.
Alarm occurs only at power
ON
E
Alarm occurs during motor
operation
A, B, C, D