SERIES-B DNA 75w Troubleshooting & Common Questions

Created by Emma Logan, Modified on Wed, 07 Dec 2022 at 12:59 PM by Emma Logan

How do I clean my SERIES-B DNA 75w?

From time to time, the 510 connector on the SERIES-B DNA 75W may need to be cleaned. A build-up of e-liquid residue may develop through general use, which can inhibit power delivery, or prevent the device from getting a clear resistance reading from the attached tank.


To clean, simply:

  • Remove the attached tank from the device.
  • Use a pin/needle to clear the connector and battery threads.
  • Doing this will clear away any dirt or debris that may be preventing a good connection. Use some paper towel or cotton wool to wipe away any leftover residue that may be left on the connector and battery threads.


What do the error messages on the screen mean?

Occasionally, you may find that your SERIES-B DNA 75w box mod kit isn't performing as it usually does, and will be presenting one of the following error messages:


  • Check atomiser: If there is no tank connected to the device, pushing the power button will cause the OLED screen to display the ‘CHECK ATOMIZER’ error message. This error can also be caused by dirty connectors/threads, or a problem with the fitted coil.


  • Shorted: If the device detects a short circuit within the atomiser or wiring, it will display the ‘SHORTED’ error message. Check your coil build for shorts. This can also be caused by overtightening your atomiser onto the device.


  • Weak battery: When the remaining voltage in the fitted IMR battery drops below 3.4v, the OLED screen will display a ‘WEAK BATTERY’ error message. This can also be caused by using a battery with a low max. amperage rating. The device will continue to fire the atomiser, but will automatically step down the wattage to safe levels until the battery is charged/replaced.


  • Check battery: If the fitted battery has heavily discharged (beyond around 3.0v) and is in immediate need of recharging, or has been damaged, the ‘CHECK BATTERY’ error message will be displayed. The error message will flash for a few seconds each time the fire button is pushed, but the device will not fire the atomiser until the battery has been charged/replaced.


  • Temperature protected: When using a TC atomiser, if the device detects that the maximum temperature has been reached (as set by the user), the ‘TEMPERATURE PROTECTED’ error message will be displayed. The device will continue to fire, but at a lower wattage until the temperature drops below the maximum level again.


  • Ohms too high: When the resistance of the fitted coil is too high for the current wattage setting, the OLED screen will display the ‘OHMS TOO HIGH’ error message. The device will continue to fire, but not in the desired setting. Check the coil build and the desired wattage setting.


  • Ohms too low: When the resistance of the fitted coil is too low for the current wattage setting, the OLED screen will display the ‘OHMS TOO LOW’ error message. The device will continue to fire, but not in the desired setting. Check the coil build and the desired wattage setting.


  • Too hot: The device is fitted with onboard temperature sensors. Should the internal temperature of the device become too high, it will shut down and display ‘TOO HOT’ until the temperature drops back to a safe level.


What is Voltage/Resistance/Wattage?

High school physics may be a distant memory for some, so let us quickly explain what each means.

  • Voltage – The force of the current (Amps) applied to your atomiser. 
  • Resistance – How much resistance is applied to that power, with lower resistances(Ω) reaching higher temperatures than higher resistances.
  • Wattage – The final power outputted by the device.


Wattage mode enables you to set your desired output and the device will supply the correct voltage based on the resistance reading of the attached atomiser. Higher wattages will produce more heat, so it’s important to use an atomiser with plenty of airflow to help keep the coil cool and to avoid dry burning.



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