The 169.x.y.z addresses aren't from any range the WPA4220 may have -- Check RFC 5735. It's for link-local auto-config, and it's specifically used when a node CANNOT get an IP of its own (none...

Vincent wrote WPA4220 will obtain IP address from the DHCP server in the LAN.. Not according to a tshark located directly between the unit and everything else, specifically looking for port67/68...