What does a ‘External Power Low’ message mean?
This message is displayed on Inogen oxygen concentrators. It means that the external power supply is too low to run on the unit, which is running on battery power despite being plugged in. You should check your external power supply connections and use a difference power plug if able. If the message persists the concentrator may need a service.
This is a low-priority alert message and is accompanied by a double beep and a solid red light.