Terminal Board Connection Error

What does CPF08 mean?

There is a faulty connection between the terminal board and the control board. This critical connection is necessary for processing all input/output signals (e.g., start/stop commands, speed references, fault outputs). A poor connection can lead to unreliable control, intermittent operation, or a complete lack of response from the drive, affecting machine safety and performance. This fault may also indicate an EEPROM serial communication fault within the terminal board itself.

Complete Troubleshooting Guide

1. 1

   Turn off the power to the drive and firmly reconnect the terminal board to ensure a secure and stable connection with the control board.

2. 2

   If the problem continues after reconnecting, contact Yaskawa technical support for guidance on replacing either the control board or the entire drive unit.