I have used frostbite all threw the winter in my epiphany and honestly i could count on 1 hand the amount of breaks i have had, maybe see if you could get a hold of some?.
Make sure the green on button is flashing fast not double blinking (thats eyes off), next make sure you clean your barrel proply, use a squeegie then a fluffy, alot of the problems come from previous bursts that you try and shoot threw.
On this marker its dowtfull that the dwell has anything to do with it, it simply just wouldnt fire if it was to low and to high will make no diffrence really anyways except you get crap efficiancy.
Like i said at the start try some frostbite and dont keep it warm at all!
Hope this helps matey, if ya have any other probs with your epiphany feel free to pm me, i am sure i have hit just about everything with them and will help not a problem