Installation Manual
71
Between Indoor and Master Outdoor unit
B
SODU
IDU
INTERNET DRY1 DRY2 GND 12V
A
B
A
B
A
Master
Outdoor Unit
B
SODU
IDU
INTERNET DRY1 DRY2 GND 12V
A
B
A
B
A
Master
Outdoor Unit
B
SODU
IDU
INTERNET DRY1 DRY2 GND 12V
A
B
A
B
A
Slave1
Outdoor Unit
B
SODU
IDU
INTERNET DRY1 DRY2 GND 12V
A
B
A
B
A
Slave2
Outdoor Unit
3
4
3
4
3
4
B
SODU
IDU
INTERNET DRY1 DRY2 GND 12V
A
B
A
B
A
Slave3
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 Lines 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.
Electrical Wiring
