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9-2. Address Setup & Group Control
<Terminology>
Indoor unit No. : N – n = Outdoor unit line address N (Max. 30) – Indoor unit address n (Max. 64)
Group address :0 = Single (Not group control)
1 = Header unit in group control
2 = Follower unit in group control
Header unit (= 1) : The representative of multiple indoor units in group operation sends/receives signals to/
from the remote controllers and follower indoor units.
(*It has no relation with an indoor unit which communicates serially with the outdoor units.)
The operation mode and setup temperature range are displayed on the remote controller
LCD. (Except air direction adjustment of louver)
Follower unit (= 2) : Indoor units other than header unit in group operation
Basically, follower units do not send/receive signals to/from the remote controllers.
(Except errors and response to demand of service data)
Master unit : This unit communicates with the indoor unit (sub) which serial-communicates with the
(Representative unit) outdoor units and sends/receives signal (Command from compressor) to/from the outdoor
(Header Twin) units as the representative of the cycle control in the indoor units of the identical line
address within the minimum unit which configures one of the refrigerating cycles of Twin,
Triple, Double twin.
Sub unit : Indoor units excluding the header unit in Twin, Triple, Double twin
(Subordinate unit) This unit communicates with (Master) indoor unit in the identical line address and performs
(Follower Twin) control synchronized with (Master) indoor unit.
This unit does not perform the signal send/receive operation with the outdoor units.:
N judgment for serial signal error.
9-2-1. System configuration
1. Single 2. Single group operation
Outdoor
Indoor
(Header/Master)
Remote controller
1-1
Header/Master
1-2
Follower/Sub
1-3
Follower/Sub
1-1
Individual
1-1
Header/Master
1-2
Follower/Sub
3. Triple