[jsr]

The HK 150A ESC is made by ZTW, which is a different company and thus isn't the same firmware or programming as the Hobbywing ESCs. That may be your problem. HK started carrying the ZTW/HK 150A specific program card not long ago, so if you don't have that, you might want to pick it up. The items are completely different between the ZTW/HK program card and the HW program cards.