Quad 0.15 is a high power coil. Not sure of range in wattage as not used a smok in around 5 years.
You should get something out of it at over 50watts but at a guess that coil may take up to 80-90watts.
Could you tell us what you have on the screen. Does it show say 50w or something with farenhite or centigrade which is TC temp control mode which should only be used with certain coils.
If you could upload a picture of the screen it might be easier.
You may need 1 or 2 more posts though until you can upload a pic.