Yocan hive 2.0 blinking 3 times means no cartridge.
When the Hive 2.0 is charging, three blue lights will flash in a loop. If the battery is charged to 35%, the first blue light will stay on, while the other two lights keep flashing in a loop. When the Yocan Hive 2.0 is charged to 70%, the first and second lights stay blue while the third light continues flashing.

So, if you Yocan hive 2.0 blinking 3 times, please check the contact points.
Or reload a new cartridge.

If you want to learn more information about
Yocan Hive 2.0 User Manual Download - Yocan Tech
https://www.yocantech.com/yocan-hive-2- ... nload.html