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u Example Connection of Transmission Cable
2 Outside Units
■ When the power source is connected
In series between the units.
3 Phase 3 Wires
Power supply
60Hz 220V
(Main Switch)
Power supply
1 Phase 60Hz
220V
Power supply switch
(Switch)
■ When the power source is supplied to
Each outside unit individually.
3 Phase 3 Wires
Power supply
60Hz 220V
(Main Switch)
Power supply switch
Power supply
1 Phase 60Hz
220V
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Transmission disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the
equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the prod-
uct is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
Between Indoor and Master Outside unit
SODU
IDU
INTERNET
B
A
B
The GND terminal is a '–' terminal for the central controller, not Ground Line
• Make sure that terminal number of master and slave outside unit are matched.(A-A,B-B)
Power supply switch
(Switch fuse : ELCB)
Power supply switch
(Switch fuse : ELCB)
(Switch)
DRY1 DRY2 GND
12V Master
A
Outside
unit
Master
3 Phase 3 Wires Power line(R, S, T)
Slave
Transmission line (3 line): Wired remote control
Single Phase of power supply line(L, N)
Transmission line (2 shield line):
Between Outside Unit and Outside Unit
Transmission line (2 shield line):
Between Indoor Unit and Outside Unit
Pull Box(Installer option)
SODU
IDU
INTERNET
DRY1 DRY2 GND
B
A
B
A
SODU
IDU
INTERNET
DRY1 DRY2 GND
B
A
B
A
Electrical Wiring
Pull Box(Installer option)
12V
Master
Outside
unit
12V
Slave
Outside unit
Installation Manual 53
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