During firmware upgrades, the network gateway stops communicating with the user interface. As a side effect, the user interface will display an error code. When the network gateway is fully upgraded, communication will restart and the error will disappear from the user interface.
BRP069A6x:
It’s expected that error code “U8-01” will appear on the user interface temporarily.
DRGATEWAYAA:
It’s expected that error code “U4-66” will appear on the user interface temporarily.