Panasonic U-72MF2U9 Installation Instructions Manual page 46

Example: Basic Wiring Diagram (2)
• Case of link wiring
No. 1 refrigerant system
Unit 1 setting (outdoor main unit)
System address
(System 1 setting)
(SW1) (SW2)
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 the section "ATTENTION!".
No. of indoor units
(13 units setting)
(SW3)
ON
ON
1 2
(SW4)
OFF
ON
ON
2 3 OFF
1
(SW6) Unit
(SW5)
ON
number
ON
ON
setting
(unit 1)
1 2 3
OFF
1 2 3
Set the terminating
resistance pin to
Outdoor unit
Unit 1
SHORT side. (CN67)
(Main)
system 1
Inter-outdoor unit
control wiring
1-1
Indoor unit
Remote
Controller
Unit 1 setting (outdoor main unit)
System address
(System 2 setting)
(SW1) (SW2)
ON
ON
1 2
OFF
Number of
outdoor units
(SW6)
ON
(2 units setting)
ON
1 2 3 OFF
Outdoor unit
system 2
Indoor unit
Remote
Controller
Outdoor unit
system z
Setting of terminal pin (CN67)
Refrigerant circuit No. 1
Refrigerant circuit No. 2 to z-1
Refrigerant circuit No. z
Unit 2 setting
(SW5)
Unit
ON
ON
ON number
setting
OFF
(unit 2) 1 2 3
OFF
Unit 2
(Sub)
Inter-unit control wiring
1-2 1-3
Remote control
communication wiring
Number of indoor units
(9 units setting)
(SW3)
(SW4)
ON
ON
OFF
1 2 3
Unit
Unit
(SW5)
ON number
number
ON
setting
setting
(unit 2)
(unit 1)
OFF
1 2 3
Set the terminating
Unit 1
resistance pin to
(Main)
OPEN side. (CN67)
Inter-unit control wiring
2-1 2-2
Remote control
communication wiring
Set the terminating
Unit 1
resistance pin to
(Main)
SHORT side. (CN67)
Inter-unit control wiring
To z refrigerant system indoor unit
46
Unit No. 1 (Main) : short-circuit (at shipment)
Unit No. 2 (Sub) : short-circuit (at shipment)
Unit No. 3 (Sub) : short-circuit (at shipment)
Unit No. 1 (Main) : open-circuit
Unit No. 2 (Sub) : short-circuit (at shipment)
Unit No. 1 (Main) : short-circuit (at shipment)
Unit No. 2 (Sub) : short-circuit (at shipment)
Unit 3 setting
(SW5)
Unit
ON
number
setting
(unit 3) 1 2 3
Unit 3
(Sub)
Inter-outdoor unit
control wiring
1-13
Unit 2 setting
(SW5)
ON
ON
OFF
1 2 3
Unit 2
(Sub)
Inter-outdoor unit control wiring
Unit 2
(Sub)
Inter-outdoor unit control wiring
ON
OFF
2-9