The GND terminal is a '–' terminal for the central controller, not Ground Line
Between Indoor and Master Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BABA
12V
Master
Outdoor unit
3 Phase 4 Wires
Power supply
50Hz 380~415V
Power supply
1 Phase 50Hz
220~240V
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 Indoor Unit and Outdoor Unit
Power supply switch
(Switch fuse : ELCB)
Power supply switch
(Switch)
(Main Switch)
Pull Box(Installer option)
HR unit
34 34 34
HR unit
◆ Example Connection of Transmission Cable
1 Outside Unit
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.
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