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Electrical Wiring
42 Outside Unit
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 wiring which is the same thickness, do as shown in the figure below.
• For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure
being exerted on the terminal block.
• Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head will
strip the head and make proper tightening impossible.
• Over-tightening the terminal screws may break them.
u Precautions when laying power and ground wiring
Round pressure terminal Power wire (Ground wire)
Use round pressure terminals for connections to the power terminal block.
When laying ground wiring, you must use round pressure terminals.
CAUTION
• This product have reversed phase protection detector that only works when the power is turned on.
If there exists black out or the power goes on and off which the product is operating, attach a
reversed phase protection circuit locally. running the product in reversed phase may break the com-
pressor and other parts.
• Use the 2-core shield cables for communication lines. 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 deteriorate
power factor improvement effect, but also may cause capacitor abnormal heating. Therefore, never
install a phase leading capacitor.
• Make sure that the power unbalance ratio is not greater than 2%. If it is greater, the unit's lifespan
will be reduced.
• Introducing with a missing N-phase or with a mistaken N-phase will break the equipment.
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