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ELECTRICAL WIRING
58
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, 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.
[Heat Pump]
Between Indoor and Master Outdoor unit
SODU.B SODU.A
IDU.B
IDU.A
CEN.B
CEN.A
DRY1
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
DRY2
GND
12V
SODU.B SODU.A
Outdoor Unit
SODU.B SODU.A
3
4
SODU.B SODU.A
SODU.B SODU.A
IDU.B
IDU.A
CEN.B
CEN.A
DRY1
DRY2
GND
IDU.B
IDU.A
CEN.B
CEN.A
DRY1
DRY2
GND
IDU.B
IDU.A
CEN.B
CEN.A
DRY1
DRY2
GND
IDU.B
IDU.A
CEN.B
CEN.A
DRY1
DRY2
GND
Master
12V
Outdoor unit
Slave1
12V
Outdoor Unit
Slave2
12V
Outdoor Unit
Slave3
12V
Outdoor Unit
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