I just built a 1.4 ohm coil on my kayfun lite and fired it on my ProVari. It fired a couple times and then I got the E1 error message. (Damaged atomizer or lower voltage.) I was firing at 3.6 volts. I tried to change the voltage, and then I got a "LO" message and the device wouldn't function. Finally it let me change the settings, I lowered the voltage to 3.5 and now it seems to work fine. Does anyone have any idea what happened? My primary concern is that I could be damaging something. If anyone has any ideas-please help! I'm brand new to rebuilding and need all the assistance I can get. Thanks!