Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Manual (Page 297)

9 Troubleshooting
9-32
Position Error
(Without Alarm)
(cont’d)
Noise interference due to length of
I/O signal cable
Check the I/O signal cable length.
The I/O signal cable length must be
less than 3 m.
An encoder fault occurred. (The
pulse count does not change.)
– Replace the servomotor.
A SERVOPACK fault occurred. – Replace the SERVOPACK.
Servomotor
Overheated
Ambient temperature too high
Measure the servomotor ambient
temperature.
Lower the ambient temperature to
40 °C or less.
Servomotor surface dirty Visually check the surface. Clean dust and oil from the surface.
Servomotor overloaded Check the load status with monitor.
If overloaded, reduce load or
replace with larger capacity servo-
motor.
(cont’d)
Problem Probable Cause Investigative Actions Corrective Actions