Wiring Connection - LG MULTI V ARNU07GTUA4 Engineering Product Data Book

Indoor unit
10. Installation

10.5 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.
[Indoor Unit side]
Terminal Block Indoor
L(L1) N(L2)
INDOOR POWER INPUT
Terminal Block Indoor
L(L1) N(L2)
INDOOR POWER INPUT
Terminal Block Indoor
L(L1) N(L2)
INDOOR POWER INPUT
WARNING : Make sure that the screws of the terminal are free from looseness.
CAUTION:
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have a separate power circuit specifically for the air conditioner. As for the method of
wiring, follow the circuit diagram posted on the inside of control cover.
2) 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 cause burn-out of the wires.)
3) Specification of power source.
4) Confirm that electrical capacity is sufficient.
5) See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked
on the name plate.
6) Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness.)
7) In a wet or moist area, always install an earth leakage circuit breaker.
8) The following would be caused by voltage drop.
• Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the nor-
mal function of the overload.
9) The means for disconnection from a power supply shall be incorporated in the fixed wiring and
have an air gap contact separation of at least 3mm in each active(phase) conductor.
[Outdoor Unit side]
[Type 1]
Terminal Block Indoor
SODU B
3(A) 4(B)
[Type 2]
Terminal Block Indoor
SODU
3(A) 4(B)
B
[Type 3]
Terminal Block Indoor Central controller
3(A) 4(B)
12V GND
SODU A IDU B IDU A INT B
IDU INTERNET DRY1
A - - B A
Terminal block of outdoor unit
Indoor unit
DRY2 DRY1 CEN CEN IDU IDU
INT A
DRY2 GND 12V
- - - -
Outdoor unit
SODU SODU
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Floor Standing