LG MULTI V ARNU07GTUA4 Engineering Product Data Book page 489

10. Installation
10.4 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.
[Type 1]
Terminal block of indoor unit
1(L)
Indoor power input
220V 60Hz
[Type 2]
Terminal block of indoor unit
1(L)
Indoor power input
220V 60Hz
Make sure that the screws of the terminal are free from looseness.
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 cir-
cuit 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 percent 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.
24 _
Console
2(N) 3(A) 4(B)
Outdoor unit Indoor unit
2(N) 3(A) 4(B) SODU SODU
IDU B IDU A
SODU B SODU A
Terminal block of outdoor unit
Central controller
IDU IDU INTERNET DRY1 DRY2 GND
INT B INT A
12V