Panasonic U-4LE2E5 Service Manual & Test Run Service Manual page 164

4. Auto Address Setting
Example: Basic Wiring Diagram (2)
• Case of link wiring
No. 1 refrigerant system
(System 1 setting)
Central Controller
Inter-unit
control wiring
No. 2 refrigerant system
No. Z refrigerant system
(2WAY VRF)
Inter-unit
control wiring
7
* See the section "ATTENTION!".
Unit 1 setting (outdoor main unit)
System address Number of indoor units
(9 units setting)
(SW1) (SW2) (SW3)
ON ON
ON
ON
OFF OFF
1 2
1
Unit 1
Outdoor unit
(Main)
system 1
1-1
Indoor unit
Remote
Controller
Unit 1 setting (outdoor main unit)
System address
(System 2 setting)
(SW1)
ON
ON
OFF
1 2
Outdoor unit
system 2
Indoor unit
Remote
Controller
Outdoor unit
system Z
(SW4)
Set the terminating
resistance pin to
SHORT side.
(CN-TERMINAL)
Inter-unit control wiring
1-2 1-3
Number of indoor units
(9 units setting)
(SW2) (SW3)
(SW4)
ON
ON
OFF
1
Set the terminating
resistance pin to
Unit 1
OPEN side.
(Main)
(CN-TERMINAL)
Inter-unit control wiring
2-1 2-2
Remote control
communication wiring
Set the terminating
resistance pin to
Unit 1
SHORT side.
(Main)
(CN-TERMINAL)
Inter-unit control wiring
To Z refrigerant system indoor unit
7 - 10
Mini VRF SYSTEM
Setting of terminal pin (CN-TERMINAL)
Refrigerant circuit No. 1
Unit No. 1 (Main) : short-circuit (at shipment)
Refrigerant circuit No. 2 to Z-1
Unit No. 1 (Main) : open-circuit
Refrigerant circuit No. Z
Unit No. 1 (Main) : short-circuit (at shipment)
Unit No. 2 (Sub) : short-circuit (at shipment)
Remote control
communication wiring
Unit 2
(Sub)
Inter-outdoor unit control wiring
Test Run
1-9
2-9