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Wiring between indoor and outdoor units
NOTE
An outdoor unit connected with control wiring between indoor and outdoor units wire becomes automatically the
header unit.
▼
Wiring example
U1 U2
U1 U2 U3 U4
L1 L2 L3 N
U5 U6
L N
A B
A B
U1 U2 U3 U4
L1 L2 L3 N
U5 U6
U1 U2
L N
A B
A B
U1 U2
L N
A B
A B
U1 U2
L N
A B
Outdoor Power supply
380 V - 415 V ~, 50 Hz
380 V ~, 60 Hz
Circuit breaker,
Power switch
Remote controller
Indoor unit
Outdoor Power supply
380 V - 415 V ~, 50 Hz
380 V ~, 60 Hz
Remote controller
Remote controller
Indoor unit
Indoor unit
Indoor unit
Circuit breaker
Circuit breaker
Header outdoor
unit
Follower outdoor
unit
Control wiring between outdoor units
Control wiring between indoor and outdoor units
Control wiring between indoor units
Indoor power supply
220 V - 240 V ~, 50 Hz
220 V ~, 60 Hz
Earth
Earth
Earth
Earth
Group control
Pull box
Pull box
Pull box
Earth
terminal
Earth
terminal
Wire connection
REQUIREMENT
• Connect the wires matching the terminal numbers.
Incorrect connection causes a trouble.
• Pass the wires through the bushing of wire connection
holes of the indoor unit.
• Keep a margin (Approx. 100 mm) on a wire to hang
down the electrical control box at servicing or other
purpose.
• The low-voltage circuit is provided for the remote
controller. (Do not connect the high-voltage circuit)
• Remove the mounting screws from electrical control
box cover. Dettach the cover from the electrical
control box.
• Connect the wires to the terminal block and tighten
the screws. Fix the wires with the cord clamp
attached to the electrical control box.
(Do not apply tension to the connecting section of the
terminal block.)
• Mount the cover of the electrical control box without
pinching wires.
Temporary fixing of electrical
control box
To work on the electrical control box such as check
operation, pass two fixing screws at the side plate
through the holes and fix the electrical control box
temporarily so that you can work at the front side.
(Refer to the Removal of the electrical control box.)
Remote controller wiring
Strip off approx. 9 mm the wire to be connected.
▼
Wiring diagram
Address setup
Set up the addresses as per the Installation Manual
supplied with the outdoor unit.
R(L)
R(L)
S(N)
S(N)
U
1
U
2
A
B
U
1
U
2
A
B
L
N
U
1
U
2
A
B
Power supply
wire
Cord clamp
Remote
controller
wire
Indoor / Outdoor control
wire Remote controller
terminal block
Power supply
terminal block
Control wire
between indoor
and outdoor units
Earth
Side plate
Fixing screws on the side plate
Electrical control
box
R
(L)
S
(N)
10
10
50
70
Earth line
Power supply wire
A
B
A
B
Terminal block
Remote
controller
unit
Terminal block for
remote controller wiring
of indoor unit
Remote controller wire
(Locally procured)
103-EN
104-EN
+00EH99887301-1_01EN.book Page 52 Monday, September 12, 2016 11:18 AM
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