Electrical Wiring
46
Outside Unit
R S T
Switch
Fuse
L
N
Communication Line
(2 Wires Cable)
Power Line
(4 Wires Cable)
Communication Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
[Master]
[Indoor Units]
(Main Switch)
[Slave1]
[Slave2]
R S T
Switch
Fuse
R S T
Switch
Fuse
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
3 Phase 4 Wires
Power supply
50Hz 380-415 V
Power supply
1 Phase 50Hz
220-240 V
n
3Ø, 380-415 V
Frequency
Voltage range(V)
Outdoor
Indoor
60Hz
460V
220V
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage.
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install a main electrical protection to interrupt power to all equipment of the system 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.
WARNING
Between Indoor and Master Outside unit
The GND terminal at the main PCB is a ‘-’
terminal for dry contact.
It is not the point to make ground connec-
tion.
- Make sure that terminal number of master
and slave Outside units are matched.
Slave1
Outside Unit
Master
Outside unit
SODU B SODU A
IDU B
IDU A
INT B
INT A
SODU B SODU A
IDU B
IDU A
INT B
INT A
Slave2
Outside Unit
SODU B SODU A
IDU B
IDU A
INT B
INT A
SODU B SODU A
IDU B
IDU A
INT B
INT A
Master
Outside Unit
3(A) 4(B)
3(A) 4(B)
3(A) 4(B)
MFL67705803 2018. 9. 17. 오오 12:58 Page 46
