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Electrical Wiring
ENGLISH
Installation Manual 51
u How to connect central controller (U3 Chassis, 2 Fan Model)
- The communication lines connected to INTERNET terminal should be connected to central control of Outdoor
unti with care for their polarity( A ’ A, B ’ B )
- Connect communication lines between outdoor unit and indoor units through the terminal block.
- When connecting communication line between outdoor unit and indoor units with shielded wire, connect the
shield ground to the earth screw.
- When connecting the central control system with shielded wire, connect the shield ground to the earth screw.
Terminal block on the main PCB
SODU IDU INTERNET DRY1 DRY2
B
A
B(D) A(C)
GND 12V
Outdoor Units
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