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ELECTRIC WORK
WARNING
1. Using the specified wires, ensure to connect the wires, and fix wires securely so that the
external strength of the wires do not transmit to the connecting part of the terminals.
Incomplete connection or fixation may cause a fire, etc.
2. Be sure to connect earth wire. (Grounding work)
Do not connect the earth wire to gas pipe, city water pipe, lightning rod, or the earth wire of telephone.
Incomplete grounding causes an electric shock.
3. For electric work, strictly follow to the Local Regulation in each country and the Installation
Manual, and use an exclusive circuit.
Capacity shortage of power circuit or incomplete installation may cause an electric shock or a fire.
CAUTION
Be sure to install an earth leakage breaker.
If an earth leakage breaker is not installed, an electric shock may be caused.
REQUIREMENT
• For power supply wiring, strictly conform to the Local Regulation in each country.
• For wiring of power supply of the outdoor units, follow to the Installation Manual of each outdoor unit.
• Never connect 220–240V power to the terminal blocks (A, B, U1, U2, X, Y, etc.) for control wiring.
(Otherwise, the system will be failed.)
• Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe.
The coating may melt resulted in an accident.
• After connecting wires to the terminal blocks, provide a trap and fix wires with the wire clamp.
• Store the refrigerant piping line and control wiring line in the same line.
• Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
Power supply specifications
Cables and remote controller wires are procured locally.
For the power supply specifications, follow to the table below. If capacity is little, it is dangerous because overheat or
seizure may be caused.
For specifications of the power capacity of the outdoor unit and the power supply cables, refer to the Installation
Manual attached to the outdoor unit.
Power supply switch/Earth leakage breaker or power supply wiring/fuse rating for
indoor units should be selected by the accummulated total current values of the indoor units.
220–240V ~ 50Hz
220V
~ 60Hz
Twist wire : 2.0 mm²
Twist wire : 2.5 mm²
2
(Up to 1000m) Twist wire : 1.25 mm²
(Up to 2000m) Twist wire : 2.00 mm²
2
(Up to 1000m) Twist wire : 1.25 mm²
(Up to 2000m) Twist wire : 2.00 mm²
2
Twist wire : 0.5 to 2.0 mm²
20m or less
50m or less
Q’ty
Wire size
Q’ty
Wire size
Q’ty
Wire size
Power supply
Power supply wiring
Indoor/Outdoor inter-unit wiring (*2)
Central control line wiring (*3)
Remote controller wiring (*4)
Indoor unit power supply (*1)
Communication line