Clean, dry, and reseal the terminal box; replace damaged connectors.
Use a Megohmmeter (Megger) to check insulation resistance between the motor phases (U, V, W) and the ground. fanuc 414 servo alarm z axis detect error
Use rubber boots, heat-shrink tubing, or silicone self-fusing tape around the Z-axis motor connectors to shield them from high-pressure coolant. Clean, dry, and reseal the terminal box; replace