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Installation
How to connect wirings
Remove the box cover of electric parts and connect the wiring.
Ground
Ground
Ground
Communi-
Communi-
Communi-
Power
cation cable
cation cable
cation cable
cable
Ground
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.
Terminal block
of indoor unit
L(L1)
N(L2)
Power cable
WARNING : Verify terminal screws are thoroughly tightened.
CAUTION:
After checking the above status, prepare for the following wiring :
1) Use individual power for the unit and refer to the circuit diagram posted on the inside of the control cover.
2) Use a properly sized circuit breaker with the Hydro kit.
3) The bolts used for cable connection may become loose by the vibration generated during the
transportation. Make sure to check again and fasten them tightly. (If they are loose, it may cause fire.)
4) Verify the power supply is within the tolerance range of the nameplate value ±10%
5) Electrical capacity shall be sufficient.
6) The initial voltage shall be maintained at 90% of the rated voltage on the name plate.
7) The size of the power wiring complies with the designated specification. (length and thickness of the
power cable)
8) Do not install the circuit breaker in the place where there is a lot of moisture or where it is wet.
9) The following problems may be the cause of voltage drop.
- Magnetic switch vibration, defective contact, fuse damage, malfunction of overload protection device
h Based on the ownerʼs manual, teach how to operate and use the unit to the user.
(temperature setting, etc.)
22 Hydro Kit
Lock nut
Conduit
Conduit
mounting
plate
Communi-
cation cable
Power cable
Communi-
cation cable
Terminal block
of indoor unit
Outdoor unit Indoor unit
3(A)
4(B)
SODU SODU IDU
Communication cable
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.
Central controller
IDU INTERNET
DRY1
DRY2
GND
12
Outdoor
unit
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