sigelei 30w won't fire? Help

[Zizih]

I'm new to vaping and I decided on buying a sigelei 30w with a davide bdc tank. It was working well for about an hour when the mod read "check atomizer" after not knowing what to do, I changed the coil head and it worked again however shortly after the same thing happened. what's causing this to happen? How can I fix it? Any advice will be greatly appreciated

 

[suprtrkr]

It's not making connection somehow. Often this is caused by over tightening the tank to the mod. And get a q-tip and some alcohol and clean the 510 connectors. Good luck and let us know how it works.