24
4-3. Wiring System Diagrams
■ 2-LINE CONNECTION
Example : Single connection
Indoor unit wiring sample
Remote control wiring
Integrated control wiring
Inter-unit (between outdoor and 
indoor units) control wiring
To outdoor unit (U1, U2)
To power supply (L, N)
Power supply cable
Earth wiring: 
Make the earth wiring 25 - 30 mm longer 
than connecting wires to L/1, N/2.
To remote controller (1, 2)
To integrated control system
Use this screw when connecting the shield 
for the Inter-unit control wiring to ground. 
( 
 : Functional earthing)
Clamping Clip
Clamper
*
1
 
(supplied)
*1 Fasten tightly.
1
D
B
L
N
C
2
L1
U1
U2
L1
L2
L2
L3
L3
N
N
L
U1
U2
L
N
N
C
R1
L/1
N/2
3
R2
U1
U2
1
D
2
R1
R2
U1
U2
C
 
 
C
B
L
N
L/1
N/2
3
 
 
 
 
Power supply
220-230-240V~ 50Hz (Europe)
230-240V~ 50Hz (Oceania)
Power supply 
380-400-415V 3N~ 50Hz (Europe) 
400-415V 3N~ 50Hz (Oceania)
Power supply 
220-230-240V~ 50Hz (Europe) 
230-240V~ 50Hz (Oceania)
Power supply
220-230-240V~ 50Hz (Europe)
230-240V~ 50Hz (Oceania)
Outdoor unit 
(single-phase)
Outdoor unit 
(3-phase)
Remote controller
Remote controller
Ground
Ground
Ground
Ground
( 
 : Functional earthing)
* 3-phase model connections
* Single-phase model connections
Integrated control system
Integrated control system
Indoor unit
Indoor unit
01_330918_EU_Eng.indb   24 2021/9/9   11:26:46