: Using the incorrect ground terminal (such as using SC instead of SN for internal power supply sinking mode) can inadvertently trigger this fault.
: Check the external sequence or controller sending the baseblock command to the digital inputs. Yaskawa America How to Reset yaskawa error code h66
Which (e.g., A1000, H1000, V1000) are you using so I can provide the exact manual reference? : Using the incorrect ground terminal (such as