LG MULTI V S ARUV040GSR0 Installation Manual page 48

1,MFL67798026,영영 19. 3. 14. 영영 4:49 Page 48
ELECTRICAL WIRING
48
CAUTION
!
• Use the 2-core shield cables for communication cables. Never use them together with power
cables.
• The conductive shielding layer of cable should be grounded to the metal part of both units.
• Never use multi-core cable
• As this unit is equipped with an inverter, to install a phase leading capacitor not only will deteri-
orate power factor improvement effect, but also may cause capacitor abnormal heating. There-
fore, never install a phase leading capacitor.
• Make sure that the power unbalance ratio is not greater than 2%. If it is greater the units lifes-
pan will be reduced.
Precautions when laying power wiring
Use round pressure terminals for connections to the power terminal block.
When none are available, follow the instructions below.
- Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power
wiring may cause abnormal heat.)
- When connecting cable which is the same thickness, do as shown in the figure below.
- For wiring, use the designated power cable and connect firmly, then secure to prevent outside
pressure being exerted on the terminal block.
- Use an appropriate screwdriver for tightening the terinal screws. A screwdriver with a small
head will strip the head and make proper tighterning impossible.
- Over-tightening the terminal screws may break them.
CAUTION
!
When the 400 volt power supply is applied to "N" phase by mistake, check damaged parts in
control box and replace them.
Round pressure terminal
Power cable