Wiring Specifications - Toshiba RAV-SM304MUT-E Service Manual

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.
• 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)
Central control device
U1 U2
Outdoor unit
1 2 3
Indoor unit
U3 U4 1 2 3
A B
Remote controller
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.
Central control device
U1 U2
U3 U4
Refrigerant line 1
Outdoor unit
Indoor unit U3 U4
1:1 model connection interface
(TCC-LINK adapter)
This product
( )
sold separately
Remote controller
Line address
SW01 Bit 1
SW01 Bit 2
Remarks Turn SW01 Bit 1 to ON.
(Reference) Setup contents of switch
SW01
Bit 1 Bit 1
OFF OFF
ON OFF
OFF ON
ON ON
AMP Air Conditioning
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.
1 2 3
Header unit
U3 U4 1 2 3
A B
Remote controller
(Group operation)
Central control device
Central control devices: Max. 10 units
U1 U2
U3 U4
Refrigerant line 2
1 2 3 1 2 3
Header
unit
1 2 3 U3 U4 1 2 3
A B A B
Remote controller
Group operation (Max. 8 units)
1 2
ON OFF
OFF OFF
As status shipped from factory
Terminator
None
100Ω
75Ω
43Ω
No. of wires
CAUTION
Central control system wiring
1 2 3 1 2 3
Follower unit Follower unit
1 2 3 1 2 3
A B
Remote controller Remote controller
Refrigerant line 3 Refrigerant line 4
1 2 3
Followerunit Follower unit
1 2 3
A B
Remote controller wiring
Remote controller Remote controller
Remarks
Mixed with SMMS (Link wiring) at shipment from factory
Central control by digital inverter only
Spare
Spare
– 79 –
Size
Up to 1000m: twisted wire 1.25mm
2
Up to 2000m: twisted wire 2.0mm
: 1:1 model connection
interface
(TCC-LINK adapter)
(This option)
Follower unit
Header unit
U3 U4 1 2 3
A B A B
Earth screw
(Triple operation)
1 2 3
Indoor/outdoor inter-unit wire (AC230V serial)
Central control system wiring
* Wiring for No.1 and 2 only
Header unit
1 2 3 U3 U4 1 2 3
A B A B
Remote controller
Twin/Triple operation (Example of triple)
4
OFF
(OFF at shipment from factory)
OFF
(OFF at shipment from factory)
As status shipped from factory
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2
2
1 2 3
A B
Follower
unit
1 2 3
A B