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ENGLISH
Series outside unit s
When the power source is supplied to Each outside 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)
[Indoor Units]
Outside
Power supply
(3Ø 4wires)
Indoor
Power supply
(1Ø 2wires)
(Main Switch)
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)
[Master] [Slave1] [Slave2] [Slave3]
Frequency
Voltage range(V)
Outside
Indoor
60Hz
380V
220V
50Hz
380-415V 220-240V
Slave1
Outside unit
Master
Outside unit
Slave2
Outside unit
Slave3
Outside unit
3
4
3
4
3
4
Master
Outside 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 Outside 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 outside unit s
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.
!
u
Example Connection of Communication Cable
[BUS type]
[STAR type]
- Connection of communication
cable must be installed like
below figure between indoor
unit to outside unit .
- Abnormal operation can be
caused by communication de-
fect, when connection of com-
munication cable is installed like
below figure(STAR type).
Example) Connection of power and communication cable (UWC)
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 Connection
Communication Connection
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.
!
Summary of Contents for Multi V ARWN Series
Page 37: ......
