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Wiring Connection
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.
• For Medium Temperature
Terminal block
of indoor unit
1(L)
2(N)
Power cable
h Resistance measurement position for incorrect wiring.
• For High Temperature
Terminal block
of indoor unit
1(L) 2(N)
Power cable
Earth
!
WARNING
Make sure that the screws of the terminal are free from looseness.
!
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
Terminal block
of indoor unit
3(A)
4(B)
SODU.B SODU.A IDU.B IDU.A CEN.B CEN.A DRY1 DRY2 GND 12 V
Communication cable
Terminal block
of indoor unit
3(A)
4(B)
SODU.B SODU.A IDU.B IDU.A CEN.B CEN.A DRY1 DRY2 GND 12 V
Communication cable
Terminal block of outdoor unit
Terminal block of outdoor unit
Hydro Kit Installation Manual 29
Installation
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