The GND terminal at the main PCB is a ‘-’ terminal for day contact, it is not the point to make
ground connection.
Between Indoor and Master Outdoor unit
[Heat Pump]
B
SODU IDU INTERNET DRY1 DRY2 GND 12V
AB
A
BA
Master
Outdoor Unit
34 34 34
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.
Field Wiring(3Ø, 460V)
Note
1) Field Wiring diagram is to be used as a guideline only. Wiring should comply with applicable local and national codes
2) ELCB must have function to prevent electrical short and over current at the same time .
3) Use copper wires only.
4) Unit must be grounded in compliance with the applicable local and national codes.
5) ELCB and fuse/breaker must install to the power line
1. 60Hz
u Example Connection of Communication Cable
n 1 Outdoor Unit - 3Ø, 460V
Electrical Wiring
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