Toshiba RAV-SM1603DT-A service manual Wiring specifications, 5. P.C. board switch SW01 setup, 124

4. Wiring specifications

•	Use 2-core with no polar wire.
•	Match the length of wire to wire length of the central
		No. of wires	Size
	control system.
			Up to 1000m: twisted wire 1.25mm2
	If mixed in the system, the wire length is lengthened	2
			Up to 2000m: twisted wire 2.0mm2
	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

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.

Central control device

U1 U2

Caution 2
Outdoor unit	2	3
1
Indoor unit U3 U4 1	2	3
	A B

Remote controller

Caution 1											Central control system wiring												Caution 3
				1		2		3		1		2		3		1		2		3									: TCC-LINK adapter
																														(This option)
			Master						Sub unit												Sub unit							Master unit						Sub unit
			unit
	U3	U4		1		2		3		1		2		3		1		2		3			U3	U4	1		2	3			1		2		3
					A		B				A		B				A		B							A	B					A		B
																								Earth terminal
	Remote controller								Remote controller						Remote controller
						(Group operation)																(Triple operation)

5. P.C. board switch (SW01) setup

When performing collective control by DI or SDI only, the setup of terminator is necessary.

•Using SW01, set up the terminator.

•Set up the terminator to only the adapter connected to the indoor unit of least line address No.

Central control device

U1 U2

U3 U4

Central control device

U1 U2

U3 U4

Central control devices: Max. 10 units

Refrigerant line 1

Refrigerant line 2 Refrigerant line 3 Refrigerant line 4

Outdoor unit

1 2 3

Indoor unit U3 U4 1 2 3

A B

TCC-LINK adapter ( This product ) sold separately

	1	2	3	1	2	3
			Master			Sub
			unit			unit
U3 U4	1	2	3	1	2	3
		A B			A B
				Remote controller wiring

1		2	3
					Indoor/outdoor inter-unit wire (AC230V serial)
							Central control system wiring
												* Wiring for No.1 and 2 only
				Sub unit								Master unit		Sub unit
1		2	3			U3 U4		1		2	3		1	2	3
	A B								A B					A B

Remote controller

Remote controller Remote controller Remote controller Remote controller

					Group operation (Max. 8 units)			Twin/Triple operation (Example of triple)
Line address		1			2			4
SW01 Bit 1		ON			OF			OF	(OFF at shipment from factory)
SW01 Bit 2		OFF			OFF			OFF	(OFF at shipment from factory)
Remarks	Turn SW01 Bit 1 to ON.				As status shipped from factory			As status shipped from factory
(Reference) Setup contents of switch
SW01			Terminator				Remarks
Bit 1	Bit 1
OFF	OFF			None		Mixed with multi (Link wiring) at shipment from factory
ON	OFF			100Ω		Central control by digital inverter only
OFF	ON			75Ω		Spare
ON	ON			43Ω		Spare

– 124 –