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10-8. System Control
System control refers to connecting link wiring for control, for simultaneous-operation multi systems, group control,
and main-sub remote controller control.
10-8-1. 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 wires. (Miswiring will damage the units.)
1
2
12
1
2
U2
U1
0
L
N
N
U1
U2
1
2
L
L
N
1
2
U2
U1
L
N
Remote controller crossover
wiring for group control
System address rotary switch
(Set to “0” at the time of shipment.)
Inter-unit control wiring
Outdoor unit
Indoor
unit
Indoor
unit
Indoor
unit
For a simultaneous-operation multi
system, a maximum of 4 indoor units
can be connected to 1 outdoor unit.
Ground
Wired remote
controller
Remote controller wiring
WHT
BLK
(Optional)
Ground
Ground
Ground
Leakage breaker
Leakage breaker
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