Some of your chicken skin will blacken and char… this is part of the flavor, it’s ok. Just be sure that when this starts to happen you move it to the not so hot side of the grill… you want the chicken to cook too… if it chars too quickly you may think it is ready before it really is. This process should take a good 45 minutes, but if you have concerns, just get a meat thermometer and when the fleshy part of your chicken registers 160°F, it is all set to be taken off the grill.