ive got eleaf 40w kit with gs tc atomizer, when ive got it set at 600f, bottom left says 40.0w and 0.15ohms, some times it will say on the screen low atomizer, and temp proection? what dose that mean , if anyone with same set up can tell me whats best for my setting please thanks , why at some point dose it say low atomizer and temp proction, and I doinging something wrong, and is this safe