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54 Outside Unit
Electrical Wiring
u Example Connection of Communication Cable
2 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 equip-
ment 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.
Power supply switch
(Switch fuse)
3 Phase 3 Wires Power line(L1, L2, L3)
Communication line (3 line): Wired remote control
Single Phase of power supply line(L(1), L(2))
Communication line (2 shield line):
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Power supply switch
(Switch fuse : ELCB)
■ When the power source is supplied to
Each outdoor unit individually.
■ When the power source is supplied to
Each outdoor unit individually.
Power supply switch
(Switch fuse)
3 Phase 3 Wires
Power supply
60Hz 460V
Power supply
1 Phase 60Hz
208/230V
Master
Slave
Power supply switch
(Switch fuse : ELCB)
3 Phase 3 Wires
Power supply
60Hz 460V
Power supply
1 Phase 60Hz
208/230V
(Main Switch)
HR unit
HR unit
Pull box(installer option)
HR unit
HR unit
Pull box(installer option)
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit
Slave
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
Master
Outdoor unit
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
B
B
B
BA
A
A
A
12V
Master
Outdoor unit
3(A) 4(B) 3(A) 4(B)
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