The 5 yellow error sequence is caused by concentrate debris interrupting your connections. To resolve this remove your atomizer from the unit and use an isopropyl wipe to clean the base and atomizer connections.

Note: If the atomizer is stuck on the base and will not turn do not force. Pour isopropyl into the base's airflow port and into the atomizer chamber. Allow 30-45 seconds for the isopropyl to loosen the concentrated debris and then remove it.

After cleaning, reinstall the atomizer. When installing ensure the threads are connecting properly and the atomizer is sitting flush into the base, not crooked.

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