76
L
N
L
N
1
2
1
2
1 2
2
1
1
2
0
L
N
L
N
2
1
N
L
L N
1 2
Ground
Ground
Ground
Ground
Ground
Ground
Wireless remote
controller
*
Connection to
lead wire (white/black)
For group control (wiring locally supplied)
Wired remote
controller
white black
(Field
supply)
Outdoor unit
Inter-unit control wiring
Wall-
mounted
type
Indoor
unit No. 1
2P
(white)
Wall-
mounted
type
Indoor
unit No. 2
Wall-
mounted
type
Out-
door
unit
Indoor
unit
4P
terminal
plate
Indoor
unit No. 3
Remote controller crossover wiring
(Dia. 0.5 to 2 mm
2
)
Total length of wiring 200 m or less
Leakage breaker
Leakage breaker
Leakage breaker
Leakage breaker
(Using a wired remote controller with a
single-type system)
1. Wall-mounted units do not include a
terminal plate for connecting a remote
controller.
2. To connect the remote controller,
remote controller cord is required.
Example: Using a wireless remote controller
with a simultaneous-operation multi system
System address (S2)
(Setting at shipment:
“0”)
When using wall-mounted units in a simultaneous-operation multi
system, connect the remote controller crossover wiring to the remote
controller connector (2P) on the main unit, as shown in the diagram.
10-16. System Control
System control refers to connecting link wiring for control, for simultaneous-operation multi systems, group control,
and main-sub remote controller control.
10-16-1. Basic wiring diagram 1
Single type and simultaneous-operation multi system
●
Simultaneous-operation multi system
Up to 4 (Double-Twin) indoor units can be connected to 1 outdoor unit for operation.
(However, coordinate the outdoor unit capacity and the total capacity of the indoor units.)
(It is not possible to connect individual remote controllers for independent operation.)
●
Be careful to avoid miswiring when connecting the wiring. (Miswiring will damage the units.)
(Wiring procedure)
(1) Set the No. 1 wall-mounted indoor unit so that it can be operated by the wireless remote controller. (This is set
at the time of shipment.)
On the indoor unit control PCBs, set the No. 2 and following wall-mounted units to the sub remote controller.
(Refer to 10-16-5.)
(2) Connect the crossover wiring to the lead wires (white/black) which extend out from the remote controller connec-
tors of the No. 1 indoor unit and other wall-mounted indoor units (as shown in the basic wiring diagram 1 above).
Connect the crossover wiring to 1 and 2 on the remote controller wiring terminal plate for units (4-way, ceiling-
mounted, etc.) other than the No. 1 indoor unit.
(3) Connect the inter-unit control wiring to 1 and 2 on the No. 1 indoor unit terminal plate, and to 1 and 2 on the
outdoor unit terminal plate.
Also connect the inter-unit control wiring between the indoor units.
(4) When the indoor and outdoor unit power is turned ON, automatic address setting is performed (when there is
only 1 outdoor unit or when the system address is 0).
Fig. 10-13
04-393 DC INV Tech p 64-110 12/13/04 11:35 AM Page 76
