Nest Learning Thermostat Adapter on Twitter: "Dropair Mini6s solution for OG/Fujitsu to connect with smart thermostat can be used for all of the 3-wired remote controller indoor unit except ARG series. If
Fujitsu UTY-RSNUM Simple Wired Remote Controller
Fujitsu Wired Remote Control - UTY-RNNUM | HVACDirect.com