Filter
Top Products
2. Address Setting and Group/Twin/Triple Control
<Definition of terms>
Indoor unit No. : N-n=O/U refrigerant line address N (30 max.) -I/U address n (64 max.)
Group address : 0=Individual (without group control)
1=Header unit under group control
2=Follower units under group control
Header indoor unit (=1) : A representative unit of multiple indoor units in group operation, which performs
communication between R/C and follower I/U. (* It does not mean an indoor unit
that communicates with O/U.)
Operation mode and setting temperature range (except flap air flow control) of
header unit are reflected on the LCD of remote controller.
Follower indoor unit (=2) : Indoor units except header unit in group operation.
It does not control communication with remote controller in principle (except
response to alarm/service data request).
Main unit :
In a minimal configuration of refrigerant cycle such as twin, triple or double twin, an indoor
unit which communicates with O/U among those with same refrigerant line address.
Communicates with sub indoor units and with O/U (instructions to compressor)
on behalf of cycle control.
Sub indoor unit : Indoor units except the main indoor unit in a twin, triple or double twin system.
Communicates with the main indoor unit with the same refrigerant line address,
and provides control in synchronization with the main indoor unit. It does not
communicate with O/U (no detection of serial signal alarm).
[1] System Configuration
a)Single b)Twin
c) Single group operation
d) Multiple single/twin/triple group operation (manual address setting)
(Representative)
(Twin header)
(Sub unit)
(Twin follower)
(H/M)
Outdoor unit
Indoor unit
R/C
1:1
individual
1-2
H/M
1-1
F/S
1-4
F/S
1-3
F/S
2-1
F/M
1-1
F/M
4-1
H/M
3-1
F/M
8-1
F/M
• Each indoor unit controls outdoor unit individually.
2-1
F/M
1-1
F/M
1-2
F/S
1-3
F/S
3-3
H/M
3-4
F/S
3-2
F/S
3-1
F/S
• Main indoor unit : Receives data (thermo status, etc.) from sub indoor units with same refrigerant line
address, and controls O/U compressor referring to the self thermo status. Transmits
this instruction to sub units.
• Sub indoor unit : Receives data from the main indoor unit with same refrigerant line address and serial
interface with O/U, and performs thermo operation in synchronization with the main
unit. Sends self thermo ON/OFF request to the main unit.
(Example) 1-1 main unit communicates with 1-2 and 1-3 sub units without being
affected by indoor units with refrigerant line address 2 or 3.
H : Header indoor unit
F : Follower indoor unit
M: Main indoor unit
S : Sub indoor unit
– 72 –