Red Ping-Pong Light: Motion in Drawer | Litter-Robot 4 

Litter-Robot is equipped with the SafeCat system that uses the Cat Presence motion sensor to detect motion in the Waste Drawer.
If your unit displays a red ping-pong light bar, this indicates that motion was detected in the Waste Drawer and the Globe will cycle to the Dump position to allow the object to escape.
You will also receive a notification on your phone if you use the Whisker App.
This video will show you what to do when you experience this light pattern or app notification. For additional information or support, please visit whiskersupport.com.