Fujitsu ADUH09LUAS1 Service Manual page 39

Exterior
5-1. Indoor unit
Part name Model name
KN↓ converter UTY-VKS↓
Thermostat
UTY-TTR↓
converter
External switch
UTY-TER↓
controller
- (02-21) -
Summary
For connection between indoor unit
with UART interface and a KN↓ open
network.
This converter can control Fujitsu
General products using a third-party
thermostat controller.
Air conditioner switching can be
controlled by connecting other external
sensor switches.
5. Optional parts