I just wish I knew more about the KBox 200 so I could help you.
I did a Quick search and came across this...
Adjusting the wattage/temperature:
"Adjusting the wattage/temperature on your Kangertech KBOX
200Wis easy.
Simply press the up or down button on the device to adjust the wattage/temperature to the desired setting. Make sure the wattage/temperature and ohms of your setup does not exceed the Amp limit of your batteries, you can do this by using ohms law. For more info please refer to this
ARTICLE.
When in temp control mode, you are only able to change the max temp. The device will adjust the wattage accordingly to keep from going over the max temp."
Kangertech KBOX 200W TC Box Mod Instructions
So it sounds like the Mod will run at Max Watts while in TC. That's kinda Scary.
Because I have an early TC Mod that worked the same way. No Wattage control while in TC Mode. And it Wasn't a Reliable way to Vape. Because when the Mod did TC Wrong, I would get ALL the watts dumped onto the Coil. And then would get a Nasty Burnt hit like you are getting.