55
ENGLISH
ELECTRICAL WIRING
Field Wiring
Single outdoor unit
R S T N
Switch
Fuse
L
N
Communication cable
(2 Wires Cable)
Power cable
(4 Wires Cable)
Communication cable
(3 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
[Outdoor Unit]
[Indoor Units]
Outdoor
Power supply
(3Ø 4 wires)
Indoor
Power supply
(1
Ø
2 wires)
(Main Switch)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
3
4
3
4
3
4
Master
Outdoor Unit
SODU.B SODU.A
IDU.B IDU.A
CEN.B
CEN.A
DRY1
DRY2
GND
12V
[Heat Pump]
Between Indoor and Master Outdoor unit
The GND terminal at the main PCB is a
‘-’ terminal for day contact, it is not the
point to make ground connection.
WARNING
• Indoor Unit ground wires are required for preventing electrical shock accident during current
leakage, Communication disorder by noise effect and motor current leakage (without connec-
tion 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.
!
Frequency
Voltage range(V)
Outdoor
Indoor
60 Hz
400 V
220 V
50 Hz
380~415 V 220~240 V