We have recently replaced our aging HP access points with UniFi AP-AC-Pro and AP-Pro access points. They have all been setup and are working well with all client devices, with the exception of a single Acer ChromeBox CXi - attempting to connect to the SSID results in an "Out Of Range" error message. The AP is directly above the ChromeBox and ChromeOS shows around 75% signal strenth. Other devices in the area are fine.
I have tried powerwashing the ChromeBox - even starting it up after the powerwash the same error happens.
I have changed different security options on the SSID and also set up a new, open, SSID which has the same error message. I set up an open and secured hotspot on my phone, which the ChromeBox connected to absolutely fine. I have patched the machine in with a network cable and that also connects fine, but this is not suitable for permernant use.
There are a number of forum threads regarding issues with ChromeOS machines but there are no resolution threads posted. It was suggested to turn UAPSD (Unscheduled Automatic Power Save Delivery) on the WLAN network off, but this was not on in the first place.
The UniFi Controller is running software 5.0.6.3060.
The UniFi APS are all running software 3.7.5.4969.
The ChromeBox is running the latest version of ChromeOS.