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Wiring between indoor unit and outdoor unit
1
Figure below shows the wiring connections between the indoor and outdoor units and
between the indoor units and remote controller. The wires indicated by the broken lines or
dot-and-dash lines are provided at the locally.
2
Refer to the both indoor and outdoor unit wiring diagrams.
3
The power of the indoor unit is supplied from the outdoor unit.
Wiring diagram
q Single system
Remote controller
Remote controller wiring
Indoor side
System interconnection
wires
Outdoor side
q Simultaneous triple and double twin system
Remote controller
Remote controller
wiring
Indoor side
System
interconnection
wires
Outdoor side
* Use 2-core shield wire (MVVS AWG20 to AWG16) for the remote controller wiring in the simultaneous
twin, simultaneous triple and simultaneous double twin systems to prevent noise problems. Be sure to
connect both ends of the shield wire to earth leads.
* Connect earth wires for each indoor unit in the simultaneous twin, simultaneous triple and simultaneous
double twin systems.
Wired remote controller wiring
• As the wired remote controller wire has non-polarity, there is no problem if connections to indoor unit
terminal blocks A and B are reversed.
q Wiring diagram
25-EN
q Simultaneous twin system
Remote controller
Remote controller wiring
A B
Indoor side
S
System interconnection wires
S
Outdoor side
Power supply
Remote
controller
inter-unit
wiring
A B
Indoor
side
S
Indoor power
S
inter-unit
wiring
Power supply
Terminal block for
remote controller
wiring of indoor unit
A
B
Wired remote controller wire
(Procured locally)
A B
Power supply
Remote
controller
inter-unit
wiring
A B
A B
Indoor
side
S
Indoor power
inter-unit wiring
Triple
Double twin
Terminal block
A
B
‒ 25 ‒
Installation Manual
Remote controller
inter-unit wiring
A B
Indoor
side
S
S
Indoor power
S
inter-unit wiring
Remote
controller
inter-unit
wiring
A B
Indoor
side
S
S
Indoor power
inter-unit wiring
Wired remote
controller unit
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