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4. Wiring Specifications
• Use 2-core with no polar wire.
• Match the length of wire to wire length of the central control
system. If mixed in the SMMS system, the wire length is
lengthened with all indoor/outdoor inter-unit wire length at side.
No. of wire
s
2
S
ize
Up to 1000m: twi
s
ted wire 1.25mm
2
Up to 2000m: twi
s
ted wire 2.0mm
2
Centr
a
l control device
U1 U2
1 2 3
O
u
tdoor
u
nit
Indoor
u
nit
1 2 3
1 2 3
1 2 3
1 2 3
A B
U3 U4
1 2 3
A B
U3 U4
1 2 3
A B
1 2 3
A B
1 2 3
A B
1 2 3
A B
U3 U4
Caution 1
Remote controller
Centr
a
l control
s
y
s
tem wiring
He
a
der
u
nit
He
a
der
u
nit
Follower
u
nit
Follower
u
nit
Follower
u
nit
Caution 2
Remote controller
Remote controller
Remote controller
)
n
o
i
t
a
r
e
p
o
e
l
p
i
r
T
(
)
n
o
i
t
a
r
e
p
o
p
u
o
r
G
(
Caution 3
: 1:1 model connection
interf
a
ce
(TCC-LINK
a
d
a
pter)
(Thi
s
option)
E
a
rth
s
crew
Centr
a
l control device
U1
U3
U2
U4
Centr
a
l control device
U1
U3
1 2 3
U2
U4
Centr
a
l control device
s
: M
a
x. 10
u
nit
s
Refriger
a
nt line 1
O
u
tdoor
u
nit
Indoor
u
nit
1 2 3
Refriger
a
nt line 2
1 2 3
Refriger
a
nt line 3
1 2 3
Refriger
a
nt line 4
1 2 3
A B
U3 U4
1 2 3
A B
U3 U4
1 2 3
A B
1 2 3
A B
1 2 3
A B
1 2 3
A B
U3 U4
1:1 model connection interf
a
ce
(TCC-LINK
a
d
a
pter)
Thi
s
prod
u
ct
s
old
s
ep
a
r
a
tely
( )
Remote controller
Indoor/o
u
tdoor inter-
u
nit wire (AC230V
s
eri
a
l)
Centr
a
l control
s
y
s
tem wiring
He
a
der
u
nit
He
a
der
u
nit
Follower
u
nit
Follower
u
nit
Follower
u
nit
* Wiring for No.1
a
nd 2 only
Remote controller
Remote controller
Remote controller
Remote controller
Remote controller wiring
)
e
l
p
i
r
t
f
o
e
l
p
m
a
x
E
(
n
o
i
t
a
r
e
p
o
e
l
p
i
r
T
/
n
i
w
T
)
s
t
i
n
u
8
.
x
a
M
(
n
o
i
t
a
r
e
p
o
p
u
o
r
G
(OFF
a
t
s
hipment from f
a
ctory)
(OFF
a
t
s
hipment from f
a
ctory)
Line
a
ddre
ss
S
W01 Bit 1
S
W01 Bit 2
Rem
a
rk
s
1
ON
OFF
T
u
rn
S
W01 Bit 1 to ON.
2
OFF
OFF
A
s
s
t
a
t
us
s
hipped from f
a
ctory
4
OFF
OFF
A
s
s
t
a
t
us
s
hipped from f
a
ctory
(Reference)
S
et
u
p content
s
of
s
witch
S
W01
Bit 1
OFF
ON
OFF
ON
Bit 1
OFF
OFF
ON
ON
Terminator
None
100
Ω
75
Ω
43
Ω
Remark
s
Mixed with
S
MM
S
(Link wiring)
a
t
s
hipment from f
a
ctory
Centr
a
l control
b
y digit
a
l inverter only
S
p
a
re
S
p
a
re
• To prevent noise trouble, use 2-core shield wire.
• Connect the shield wire by closed-end connection and apply open process (insulating process) to the last
terminal. Ground the earth wire to 1 point at indoor unit side. (In case of central controlling of digital
inverter (DI, SDI) unit setup)
CAUTION
1)Closed-end connection of shield wire (Connect all the connecting parts of each indoor unit)
2)Apply open process to the last terminal (insulating process).
3)Ground earth wire to 1 point at indoor unit side.
5. P.C. Board Switch (SW01) Setup
When performing collective control by customized setup only, the setup of terminator is necessary.
• Using SW01, set up the terminator.
• Set up the terminator to only the interface connected to the indoor unit of least line address No.
