). The drive expects these signals to change state at nearly the same time. Faulty Wiring
Contact Yaskawa technical support if:
To determine if the issue lies inside the drive or out in the field wiring, you must isolate the drive. Disconnect the external safety wiring from , H2 , and HC . yaskawa error code h66
: The digital operator itself or the drive's communication port is faulty. 2. Troubleshooting Steps
Comprehensive Troubleshooting Guide for Yaskawa Error Code H66 Disconnect the external safety wiring from , H2 , and HC
Troubleshooting Yaskawa Error Code H66: Causes, Fixes, and Prevention
Troubleshooting Yaskawa Error Code H66: Causes and Solutions Disconnect the external safety wiring from
If the error persists upon power-up, disable the custom program to verify if the base drive hardware is functional.
The internal contacts of the safety monitoring relay may be welded shut or failing to respond simultaneously.
