The 2 yellow error sequence indicates that the unit is overheating. This can be caused by the unit running sessions back to back or if the unit was calibrated at a temperature too far from 77 F. To resolve the issue resync your atomizer by following the steps below:

1. Turn off the device and cool the atomizer to 77° F.

2. Turn the device back on.

3. Press the power button 4x. On the 4th press, hold down the power button for 20 seconds or white LEDs appear.

3 white LED blink indicates failure, 4 indicates successful resync

If you are still experiencing this issue please register your device [https://focusv.com/apps/product-registration] and submit a warranty claim here: https://support.focusv.com/hc/en-us/requests/new