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7. Electrical Wiring
M5: 1.5 to 1.8 lbf.ft (2.0 to 2.4 N·m)
M6: 3.0 to 3.7 lbf.ft (4.0 to 5.0 N·m)
M8: 6.6 to 8.1 lbf.ft (9.0 to 11.0 N·m)
M10: 13.3 to 17.0 lbf.ft (18.0 to 23.0 N·m)
Connect earth wires for the outdoor / indoor unit to prevent an electrical shock or an unexpected
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accident. The earth work must be performed by qualified professionals.
Turn completely OFF the power source to prevent an electrical shock when opening the service cover to
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perform the electrical work or the maintenance.
Take care not to pinch electrical wirings when attaching the service cover. It may cause an electrical
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shock or fire.
The ground wire must be longer than the current-carrying conductor when installing the power cord.
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Using the air conditioner power terminal to transfer the power cord is strictly prohibited. A power
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distribution box can be used to expand the power distribution on the indoor unit.
NOTICE
The procedure of the wiring work shall be performed according to this manual and "Installation &
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Maintenance Manual" of the outdoor unit.
The control cable (Field-Supplied) between the indoor unit and the outdoor unit does not have any
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polarity. Do not apply an excessively high voltage to the cable (Rated Voltage 5V). It may cause failure.
The wired remote controller cable (Field-Supplied) does not have any polarity. Do not apply an
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excessively high voltage to the cable (Rated Voltage 15V). It may cause failure.
Maintain the rated voltage for the power source. It may be harmful to the unit if the voltage is either too
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high or too low.
Take enough capacity for the power source. If not, the operation cannot be started due to the wide
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voltage reduction.
7.1 General Check
1. Ensure that the electrical equipment used in the installation site (main power switch, circuit breakers,
wires, conduit connectors and wires terminals) have been properly selected in accordance with local
laws and regulations.
2. Use the shielded twist pair cable for the control cable between the outdoor unit and the indoor unit,
the control cable between indoor units and the wired remote controller.
3. Check to ensure that the power supply voltage is within ±10% of the rated voltage.
4. Check the capacity of the electrical wires. If the power source capacity is too low, the system cannot
be started due to the voltage drop.
5. Check to ensure that the earth wire is connected.
6. Power Source Main Switch
Install a Power Source Main Switch in accordance with relevant local laws and regulations. The distance
between switch contacts should large than 9/64in(3.5mm) when the switch is off.
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