LG ARUN080LTE4 - Page 23

23
ENGLISH
When the power source is supplied to Each outdoor unit individually.
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)
[Master]
[Indoor Units]
Outdoor
Power supply
(3Ø 4wires)
Indoor
Power supply
(1Ø 2wires)
(Main Switch)
[Slave1] [Slave2] [Slave3]
R S T N
Switch
Fuse
R S T N
Switch
Fuse
R S T N
Switch
Fuse
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Frequency
Voltage range(V)
Outdoor Indoor
60Hz 380V 220V
50Hz 380-415V 220-240V
Slave1
Outdoor Unit
Master
Outdoor unit
Slave2
Outdoor Unit
Slave3
Outdoor Unit
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
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
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 dry contact.
It is not the point to make ground connection.
- Make sure that terminal number of master and slave outdoor units
are matched.(A-A,B-B)
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 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, mo-
mentary 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.
!
CAUTION
It should be wiring power cables or communication cables to
avoid interference with the oil level sensor. Otherwise, That oil
level sensor would be operated abnormally.
!
Example) Connection of power and communication cable (UX2)
Main power
terminal block
Ground wire
Power/
Ground cable
Over
50mm gap
Communication
cable
Main power
terminal block
Ground wire
Power/
Ground cable
Over
50mm gap
Communication
cable
Main power
terminal block
Ground wire
Power/
Ground cable
Over
50mm gap
Communication cable
Main power
terminal block
Insulation sleeves
attachments
Fix firmly not
to be displaced
ODU-IDU
Communication cable
ODU-ODU
Communication cable
Main power
terminal block
Ground wire
Power/Ground cable
Over
50mm gap
Communication
cable
Left Side Right Side
Front Side 1 Front Side 2
Main Power Connection Communication Connection
Example) Connection of power and communication cable (UX3)
Main power
terminal block
Ground wire
Power/
Ground cable
Over
50mm gap
Communication
cable
e
wer
Main power
terminal block
Ground wire
Power/
Ground cable
Over
50mm gap
Communication
cable
Left Side Right Side
Example) Connection of transmission wire
[BUS type] [STAR type]
- Connection of communication
cable must be installed like
below figure between indoor
unit to outdoor unit.
- Abnormal operation can be
caused by communication de-
fect, when connection of com-
munication cable is installed like
below figure(STAR type).