From the dna30 data sheet:
Error Messages
The
dna 30 will indicate a variety of error states.
Check Atomizer: The DNA does not detect an atomizer, the atomizer has shorted out, or the atomizer resistance is incorrect for the power setting.
Shorted: The atomizer or wiring are short circuited.
Check Battery: The battery is below 3.1 volts. It probably needs to be charged.
Weak Battery: The battery sags excessively when firing. This typically means the user is not using a high rate battery, or the battery is old and degraded. It can also mean the battery is not making good contact.
Too Hot: The DNA 30D has onboard temperature sensing. It will shut down and display this message if the internal board temperature becomes excessive.
Too low power setting: The DNA 30D puts out a minimum of 4 volts. With low power settings (7 to 8 watts) and low resistance atomizers (below 2 ohms) the DNA will sometimes be unable to provide a low enough power output to be power regulating. If this is the case, the Ohms display will be flashing. The device will still operate.
Device resets: If the battery is not able to power the device at the desired setting, or the battery is excessively discharged, the device may go immediately into a low voltage shutdown. If firing the device causes the screen to blank out and then display the welcome screen, you should charge, replace or upgrade your battery. This is especially common at power settings above 20 watts.
