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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 color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit
respectively.
Terminal Block Indoor
1(L)
2(N)
INDOOR
POWER INPUT
WARNING
!
Make sure that the screws of the terminal are free from looseness.
CAUTION
!
The Power cord connected to the unit should be selected according to the following
specifications.
CAUTION
!
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have separate power specially for the air conditioner. As for the method of wiring, follow the circuit
diagram pasted on the inside of control box cover.
2) Provide a circuit breaker switch between power source and the unit.
3) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to
which the unit is subjected during the course of transportation. Check them and make sure that they are all
tightly fastened. (If they are loose, it could give rise to burn-out of the wires.)
4) Confirm the Specification of power source
5) Confirm that electrical capacity is sufficient.
6) Be sure that the starting voltage is maintained at more than 90 % of the rated voltage marked on the name plate.
7) Confirm that the cable thickness is as specified in the power sources specification.
(Particularly note the relation between cable length and thickness.)
8) Do not install the leakage breaker in a place which is wet or moist.
Water or moist may cause short circuit.
9) The following troubles would be caused by voltage drop-down.
• Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance to the normal function
of a overload protection device.
• Proper starting power is not given to the compressor.
NOTICE
Refer to the table below when selecting the circuit breaker.
- Use the circuit breaker instead of fuse.
- MFA(Maximum Fuse Amperes) is used to select the circuit breaker and ground fault circuit interrupter.
Capacity (kBtu/h)
7
9
12
18
24
SODU
3
4
B
A
MFA (A)
!
15
• Don't install an individual switch or electrical outlet to
15
disconnect each of indoor unit separately from the
15
power supply.
15
• Install the main switch that can interrupt all the power
15
sources in an integrated manner because this system
consists of the equipment utilizing the multiple power
sources.
Terminal Block of outdoor unit
IDU
INTERNET
DRY1
B
A
B
A
-
WARNING
DRY2
GND 12V
Outdoor
Unit
-
-
-
Installation Manual 9
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