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Example: Basic Wiring Diagram (2)
• Case of link wiring
No. 1 refrigerant system
System address
(System 1 setting)
ON
OFF
Number
of outdoor
units (3 units
setting)
Central Controller
Inter-unit
control wiring
No. 2 refrigerant system
No. Z refrigerant system
Inter-unit
control wiring
* See section "ATTENTION!".
Unit 1 setting (outdoor main unit)
Number of indoor units
(13 units setting)
(SW2)
(SW1)
(SW4)
ON
ON
ON
1
2
OFF
2
1
Unit
(SW6)
ON
number
ON
setting
(unit 1)
OFF
1
2
3
Outdoor unit
Unit 1
system 1
(Main)
1-1
Indoor unit
Remote
Controller
Unit 1 setting (outdoor main unit)
System address
(System 2 setting)
(SW2)
(SW1)
ON
ON
OFF
1
2
Number
of outdoor
ON
units (2 units
setting)
OFF
Outdoor unit
system 2
Indoor unit
Remote
Controller
Outdoor unit
system Z
(SW3)
3
Unit 2 setting
(SW5)
Unit
ON
number
ON
setting
OFF
(unit 2)
1
2
3
Set the terminating
resistance pin to
SHORT side. (CN67)
Inter-outdoor unit
control wiring
Inter-unit control wiring
1-2
1-3
Number of indoor units
(9 units setting)
(SW4)
(SW3)
ON
ON
OFF
1
2
3
Unit
(SW6)
(SW5)
ON
number
ON
ON
setting
(unit 1)
OFF
1
2
3
1
Set the terminating
Unit 1
resistance pin to
(Main)
OPEN side. (CN67)
Inter-unit control wiring
2-1
2-2
Set the terminating
Unit 1
resistance pin to
(Main)
SHORT side. (CN67)
Inter-unit control wiring
To Z refrigerant system indoor unit
55
Setting of terminal pin (CN67)
Refrigerant circuit No. 1
Unit No. 1 (Main) : short-circuit (at shipment)
Unit No. 2 (Sub) : short-circuit (at shipment)
Unit No. 3 (Sub) : short-circuit (at shipment)
Refrigerant circuit No. 2 to Z-1
Unit No. 1 (Main) : open-circuit
Unit No. 2 (Sub) : short-circuit (at shipment)
Refrigerant circuit No. Z
Unit No. 1 (Main) : short-circuit (at shipment)
Unit No. 2 (Sub) : short-circuit (at shipment)
Unit 3 setting
(SW5)
Unit
ON
number
ON
setting
OFF
(unit 3)
1
2
3
Unit 2
(Sub)
Inter-outdoor unit
control wiring
Remote control
communication wiring
Unit 2 setting
Unit
number
ON
setting
(unit 2)
OFF
2
3
Unit 2
(Sub)
Inter-outdoor unit control wiring
Remote control
communication wiring
Unit 2
(Sub)
Inter-outdoor unit control wiring
(SW5)
ON
ON
OFF
1
2
3
Unit 3
(Sub)
1-13
(SW5)
ON
1
2
3
2-9
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