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 wires
2
Size
Up to 1000m: twisted wire 1.25mm
2
Up to 2000m: twisted wire 2.0mm
2
Central control device
U3 U4
Uh
1 2 3
Outdoor unit
Indoor unit
1 2 3
1 2 3
1 2 3
1 2 3
A B
U3 U4
Uh
Uh
Uh
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
Central control system wiring
Header unit
Header unit
Follower unit
Follower unit
Follower unit
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
interface
(TCC-LINK adapter)
(This option)
Earth screw
Central control device
U3 U4
Uh
Uh
Central control device
U3
1 2 3
U4
Central control devices: Max. 20 units (TU2C-Link) / 10 units (TCC-Link)
Refrigerant line 1
Outdoor unit
Indoor unit
1 2 3
Refrigerant line 2
1 2 3
Refrigerant line 3
1 2 3
Refrigerant line 4
1 2 3
A B
U3 U4
Uh
Uh
Uh
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 interface
(TCC-LINK adapter)
This product
sold separately
( )
Remote controller
Indoor/outdoor inter-unit wire (AC230V serial)
Central control system wiring
Header
unit
Header unit
Follower unit
Follower unit
Follower
unit
*
Wiring for No.1 and 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
Group operation
(OFF at shipment from factory)
(OFF at shipment from factory)
Line address
SW01 Bit 1
SW01 Bit 2
Remarks
1
ON
OFF
Turn SW01 Bit 1 to ON.
2
OFF
OFF
As status shipped from factory
4
OFF
OFF
As status shipped from factory
(Reference)
Setup contents of switch
SW01
Bit 1
OFF
ON
OFF
ON
Bit 1
OFF
OFF
ON
ON
Terminator
None
100
Ω
75
Ω
43
Ω
Remarks
Mixed with SMMS (Link wiring) at shipment from factory
Central control by digital inverter only
Spare
Spare
• 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.
- 91 -
