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Group combination
When executing group control on multiple unit system
Group control of up to 8 units is available with single remote controller.
Use wired remote controller for group control.
• For wiring and wiring procedures for individual system (using the same refrigerant), refer to the installation manual
of each combination.
• Wiring between systems should be done by the following procedures:
Connect the remote-controller terminal plate (A, B) on the indoor unit, to which the remote controller is connected,
to the terminal plate (A, B) on each of other indoor units by linking them with each other with remote controller wiring.
• Automatic address setting commences when the power is turned on. After 3 minutes, “SETTING” will be indicated
on the display panel to show that the address is being set.
Automatic address setting takes approximately 5 minutes until completion.
(Group Control of Single System)
• Change and check of address should be carried out by the following procedures.
• Length of wires for remote controller (L) should be 200 m (in case of using wireless remote receiver), 300 m
(another controller) or less.
• Length of wires for remote controller should be 200 m or shorter in total (i.e., L1 + L2 +…. Ln).
NOTE
Some group control system configuration requires manual address change after automatic address setting.
• System configuration that requires address change is the combined system where twin and triple system of
multiple units are controlled by group control with single remote controller.
(Group Control on Combined System)
(For example)
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Indoor unit
Remote controller
After the power is turned on, address setting will be completed
L1
3
L
2
L
L
Ln
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(up to 8 units)
Control line
Other connecting line
System
Unit No.
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Remote controller
Outdoor unit
Outdoor unit
(Example of
random setting)
(Example of address
setting change)
Unit on which
automatic
address is set
After changed
by manual
address setting
)
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(
Block of dotted lines
represents each system.
Sample
procedure
Address : 1-1-1
Address : 2-1-2
Address : 3-3-1
Address : 3-1-2
Address : 2-2-2
Address : 1-1-1
Address : 2-1-2
Address : 3-1-2
Address : 3-2-2
System address
(Remote controller
indicated “R.C.”)
Group address
Indoor address
When the power is turned on, the above addresses are
set by automatic address setting. However, system
address and indoor unit address are randomly set and
thus the address setting should be changed by manual
address setting so that system address and indoor unit
address are matched.
Address : 2-2-2
7
INDOOR UNIT OPERATION WHEN CONNECTED TO
MULTIPLE UNITS
