It could be one of several safety or battery-related reasons:
Your Vuse ePod 2+ is designed to automatically stop producing vapour if activated for more than five seconds.
It will also stop producing vapour and automatically lock if you vape for a total of more than 40 seconds in a 60 second period. If you vape after this has happened, the LED will flash red and no vapour will be produced. Wait 30 seconds and then unlock to vape again.
Your Vuse ePod 2+ device is designed to automatically stop producing vapour if a short circuit is detected. The LED will flash red three times, If the problem persists contact consumer care.
If you've locked your Vuse ePod 2+ (either via the button or the MyVuseApp), the LED will light red and vibrate to remind you to unlock the device, no vapour will be produced. Simply unlock by pressing the button quickly three times or unlock from the MyVuseApp (when phone is in range).
Your Vuse ePod 2+ needs charging.