With my very limited knowledge on vaping, I have a DNA200 and get this temp warning. Looking in Escribe I see it occurs when there is a conflict between temp setting and wattage setting.
If the wattage setting tries to push temp past the temp setting the temp protect warning triggers and lowers wattage to keep temp at set temp. Mostly this will occure with a low temp setting, occurring more and faster the higher the wattage setting.
Low wattage settings will take longer to hit temp warning high settings faster but once temp setting and temp protect warning pops the wattage setting is no longer relevant as the chip will drop wattage to protect the temp setting...
If I'm not mistaken this is True Temperature Control.