Power supply switch
(Switch fuse : ELCB)
3 Phase 4 Wires Power line(R, S, T, N)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L,N)
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
3 Phase 4 Wires
Power supply
50Hz 380~415V
Master
Slave1
Slave2
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Power supply switch
(Switch fuse : ELCB)
3 Phase 4 Wires
Power supply
50Hz 380~415V
■ When the power source is supplied to
Each outdoor unit individually.
■ When the power source is connected
In series between the units.
(Main Switch)
(Main Switch)
The GND terminal is a '–' terminal for the
central controller, not Ground Line
Between Indoor and Master Outdoor unit
Slave1
Outdoor unit
Master
Outdoor unit
Slave2
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
B
B
B
B
BA
A
A
A
A
12V
Master
Outdoor unit
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
Power supply
1 Phase 50Hz
220~240V
Power supply switch
(Switch)
Pull Box(Installer Option)
◆ Example Connection of Communication Cable
3 Outdoor Units
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication 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.
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