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Electrical Wiring
u Example Connection of Transmission Cable
3 Outside Units
■ When the power source is connected
In series between the units.
3 Phase 4 Wires
Power supply
50Hz 380~415V
(Main Switch)
Power supply switch
(Switch)
Power supply
1 Phase 50Hz
220V
■ When the power source is supplied to
Each outside unit individually.
3 Phase 4 Wires
Power supply
50Hz 380~415V
(Main Switch)
Power supply switch
(Switch)
Power supply
1 Phase 50Hz
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
product 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
A
The GND terminal is a '–' terminal for the
central controller, not Ground Line
56
Outside Unit
Power supply switch
(Switch fuse : ELCB)
Power supply switch
(Switch fuse : ELCB)
DRY1 DRY2 GND
12V
Master
Outside unit
Master
Slave1
Slave2
SODU
IDU
INTERNET
B
A
B
SODU
IDU
INTERNET
B
A
B
SODU
IDU
INTERNET
B
A
B
3 Phase 4 Wires Power line(R, S, T, N)
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)
Pull Box(Installer option)
DRY1 DRY2 GND
12V
Master
A
Outside unit
Slave1
DRY1 DRY2 GND
12V
Outside unit
A
Slave2
DRY1 DRY2 GND
12V
Outside unit
A
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