Fujitsu AJ 126LELDH Series Design & Technical Manual page 681

Prohibited uses:
(1) Group connection of indoor units with wired remote controller
Indoor unit
(2) Group connection of indoor units
Indoor unit
(3) Group connection of indoor units with WLAN
adapter cable.
Indoor unit
Junction box
3-11. Wireless LAN adapter (UTY-TFSXZ1)
Indoor unit
3 wire
3 wire type
remote
controller
Indoor unit
3 wire
(4) Extended wiring
Extending the cable is prohibited.
Indoor unit
Adapter cable
- (05-181) -
Indoor unit Indoor unit
Indoor unit Indoor unit
Indoor unit
Junction box
2 wire
2 wire type
remote
controller
2 wire
3. Adaptor/Convertor units