38
4-3. Wiring System Diagrams
N OT E
(1) See Section 4-2 for the explanation of “B”, “C”, “D” and “E” under Section 4-3.
(2) The basic connection diagram of the indoor unit shows the terminal boards, so the terminal
boards in your equipment may differ from the diagram.
(3) Refrigerant Circuit address should be set before turning the power on.
(4) Regarding Refrigerant Circuit address setting, refer to the installation instructions supplied
with the remote controller (Optional). Auto address setting can be executed by remote
controller automatically.
(5) In the case of connecting R32 refrigerant leakage detection sensor :
• Be sure to make wirings through the ceiling or the walls so that the wires of R32
refrigerant leakage detection sensor cannot be visible from inside the room.
• A single R32 refrigerant leakage detection sensor cannot be connected to multiple indoor
units.
* Group connection “E” with a remote controller is not possible. Be sure to connect a
remote controller to each indoor unit.
(
: Functional earthing)
L
N
D
B
L
N
L
N
L
N
L
N
B
B
B
D
D
D
L
N
L1
L2
L3
N
1
2
1
2
1
2
1
2
U2
U1
L
N
L1
L2
L3
N
U2
U1
R2
R1
L
N
U2
U1
R2
R1
L
N
U2
U1
R2
R1
L
N
U2
U1
R2
R1
U2
U1
C
C
C
C
E*
Power supply
220-230-240V~ 50-60Hz
Indoor unit
(No. 1)
ex.)
Outdoor unit : U-4LZ2E5, U-5LZ2E5, U-6LZ2E5
ex.)
Outdoor unit : U-4LZ2E8, U-5LZ2E8, U-6LZ2E8
Indoor unit
(No. 2)
Indoor unit
(No. 3)
Indoor unit
(No. n)
Power supply
220-230-240V~ 50-60Hz
Power supply
220-230-240V~ 50-60Hz
R32 refrigerant leakage
detection sensor
Power supply
220-230-240V~ 50-60Hz
Ground
Ground
Ground
Ground
Ground
Ground
Remote controller
Remote controller
Remote controller
Power supply
220-230-240V~ 50Hz
Power supply
380-400-415V 3N~ 50Hz
U1
U2
R2
R1
L
N
4P terminal board
2P terminal board
Inter-unit
control
wiring
Remote
control
wiring
Power
supply
cable
Type U2
01_350115_EU_Eng.indb 38
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