Carrier KJR-120 Serie Installationshandbuch Seite 13

3. Installation method
For some units, one wired controller can support
multiple units (a maximum of 16 units). In this case,
the wired controller and unit need to be connected
to the HA and HB ports at the same time. In group
control, there will be no error displayed on the wired
controller. SeeFig. 3-9
Wired Controller 1
Indoor Unit 1
HA HB
0
Fig 3-9
Indoor Unit 2
HA HB
1
Indoor Unit n
(n<=16)
HA HB
2
.....
10-GB