LG MULTI V ARNU07GTUA4 Engineering Product Data Book page 409

Indoor unit
10. Installation
10.3 Wiring the cable to the indoor units
SB/SC
Terminal block of indoor unit
1(L) 2(N)
Indoor power input
SV
Terminal block of indoor unit
L(L1) N(L2)
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 vibra-
tions 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.
34 _
Wall Mounted Unit (Standard)
Terminal block of outdoor unit
Outdoor unit Indoor unit
SODU SODU IDU IDU
3(A) 4(B)
Terminal block of outdoor unit
Outdoor unit Indoor unit
3(A) 4(B) SODU SODU IDU IDU
Central controller
INTERNET DRY1 DRY2 GND
12V
Central controller
INTERNET DRY1 DRY2 GND
12V