MULTI V S Outdoor Unit
11. Field Wiring
100
Product Data
11.2 50Hz/60Hz (3Ø)
■ Example Connection of Communication Cable
Single Outdoor Unit
• 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.
The GND terminal at the main PCB is a ‘-’ terminal for day contact,
it is not the point to make ground connection.
R S T N
Switch
Fuse
L
N
Communication cable
(2-wire Cable)
Power cable
(4-wire Cable)
Communication cable
(3-wire Cable)
Power cable
(2-wire Cable)
Power cable
(2-wire Cable)
Power cable
(2-wire Cable)
Power cable
(2-wire Cable)
Power cable
(2-wire Cable)
[Outdoor Unit]
[Indoor Units]
Outdoor
Power supply
(3Ø 4-wire)
Indoor
Power supply
(1Ø 2-wire)
(Main Switch)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Frequency
Voltage range(V)
Outdoor Indoor
50Hz 380-415V 220-240V
60Hz 380V 220V
34
34
34
Between Indoor and Master Outdoor unit
Master
Outdoor Unit
SODU.B SODU.A IDU.B IDU.A CEN.B CEN.A DRY1 DRY2 GND 12V