52
Outdoor Unit
Electrical Wiring
3 phase 4 wires
power supply
50Hz 380~415V
Power supply
1 phase 50Hz
220V
Power supply switch
(switch fuse)
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
3
4
3
4
3
4
The GND terminal is a '–' terminal for the central controller, not ground line
Between indoor and main outdoor unit
Indoor
unit
Outdoor
unit
Central
controller
Main
outdoor unit
◆
Example Connection of Transmission Cable
1 Outdoor unit
WARNING
• Indoor unit ground lines are required for preventing electrical shock accident in 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.