A C90 troubleshooting answers
1 question with answers cited from the manufacturer manuals.
- 0Yaskawa Sigma-7 A.C90 at power-up, what to check first?
Alarm A.C90 on a Yaskawa Sigma-7 SERVOPACK indicates an Encoder Communications Error, meaning the SERVOPACK cannot communicate with the encoder. This is a Gr.1 alarm that requires the underlying cause to be resolved befo…