LG MULTI V 5 ARUN120BTE5 Installation Manual page 25

1,MFL67221438,영영 2018. 10. 4. 영영 11:29 Page 25
WARNING
!
When the total capacity is over than 68HP, Do not use single
power source for connecting series units.
The First terminal block could be burnt out.
When the power source is supplied to Each outdoor unit individually.
Outdoor
Power supply
(3Ø 4wires)
(Main Switch)
R S T N R S T N
Switch Switch
Fuse Fuse
Indoor
Power supply
(1Ø 2wires)
N
L
Power cable
(2 Wires Cable)
Power cable
(4 Wires Cable)
Pull Box
(Installer option)
Power cable
(2 Wires Cable)
Voltage range(V)
Frequency
Outdoor Indoor
60 Hz 380 V 220 V
50 Hz 380~415 V 220~240 V
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.
Between Indoor and Master Outdoor unit
The communication cables between indoor unit and master outdoor
unit are possible to connect with BUS type or STAR type.
SODU.B SODU.A IDU.B IDU.A CEN.B CEN.A DRY1 DRY2
3 4 3 4 3 4
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)
[Master] [Slave1] [Slave2]
R S T N
Switch
Fuse
Communication cable
(2 Wires Cable)
Pull Box Pull Box Pull Box
(Installer option) (Installer option) (Installer option)
Power cable Power cable Power cable
(2 Wires Cable) (2 Wires Cable) (2 Wires Cable)
Communication cable
(3 Wires Cable)
[Indoor Units]
Master
GND 12V
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND
Outdoor Unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND
Example) Connection of communication cable
[BUS type]
- Connection of communication
cable must be installed like
below figure between indoor
unit to outdoor unit.
Example) Connection of power and communication cable (UXA)
When connecting
Main power lines
/ Ground wire from left side
Gap : Over
50mm(1.97'')
When connecting
Communication wires
/ Ground wire from left side
Main power line
connection
Master
12V
Outdoor unit
Main power
terminal block
Insulation sleeves
Slave1 attachments
12V
Outdoor Unit
Slave2
12V
Outdoor Unit
Slave3
12V
Outdoor Unit
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.
[STAR type]
- Abnormal operation can be
caused by communication de-
fect, when connection of com-
munication cable is installed like
below figure(STAR type).
Bottom Side
Main power
terminal block
Ground wire
Front Side
Main power
terminal block
Ground wire
When connecting
Communication wires
/ Ground wire from
front guide panel
Fix firmly with cable tie or
Gap : Over
clamp cord not to be displaced
50mm(1.97'')
When connecting
Main power lines
/ Ground wire from
front guide panel
Communication/Ground
wire connection
Ground wire
25
Ground wire
ODU-IDU
Communication
cable
ODU-ODU
Communication
cable