LG Hydro Kit ARNH04GK2A4, Installation Manual, Page: 25 / 63

Hydro Kit
Installation Manual
25
ENGLISH
Connect the wires to the terminals on the control board individually according to the outdoor unit
connection.
• Ensure that the wire color of the outdoor unit and terminal No. are same as those of the indoor unit
respectively.
Communication cable
Power cable
❈
Resistance measurement position for incorrect wiring.
Terminal block
of indoor unit
1(L) 2(N) 3(A) 4(B)
Terminal block
of indoor unit
Outdoor unit Indoor unit
Outdoor
unit
SODU SODU IDU IDU INTERNET DRY1 DRY2
Central controller
GND 12
WARNING : Make sure that the screws of the terminal are free from looseness.
Remove the box cover of electric parts and connect the wiring.
Wiring Connection
Communi-
cation cable
Communi-
cation cable
Power
cable
Power cable
Ground
CAUTION:
When connecting the power and communication
cable, always use the terminal connector (O-
ring, Y-ring).
Make sure to tighten so that the screw of the
terminal does not get loose.
How to connect wirings
CAUTION:
Be sure to test the power line and communication line for incorrect wiring before power is applied.
1) If the power line and communication line are swapped over, the product will be damaged.
2) Incorrect wiring confirmation test method
: Measure the resistance across the power terminals (L,N) using a multi meter.
- Resistance value of a normal connection: 1 MΩ or more
- Incorrect wiring resistance value: 500 mΩ or less
Installation