Electrical Wiring - Fujitsu AJ**A72LBTF Installation Instruction Sheet

4.10. ELECTRICAL WIRING

• Wiring connections must be performed by a qualified person in accordance with specifications.
The voltage rating for this product is 400 V at 50 Hz. It should be operated within the range of 342 to 456 V.
• Before connecting the wires, make sure the power supply is OFF.
• Use a dedicated power supply circuit.
• Install a breaker at the power supply for each outdoor unit.
Improper breaker selection can cause electric shock or fire.
• Install a leakage circuit breaker in accordance with the related laws and regulations.
• Connect the connector cord securely to the terminal.
Faulty installation can cause a fire.
• Make sure to secure the insulation portion of the connector cable with the cord clamp. A damaged insulation
can cause a short circuit.
• Never install a power factor improvement condenser. Instead of improving the power factor, the condenser
may overheat.
• Before servicing the unit, turn the power supply switch OFF. Then, do not touch electric parts for 10 minutes
due to the risk of electric shock.
• Make sure to perform grounding work.
Improper grounding work can cause electric shocks.
• The primary power supply capacity is for the air conditioner itself, and does not include the concurrent use
of other devices.
• Connect the power supply lines in the positive phase. The unit will display an error if the cords are connected
in the negative phase. It will not operate properly if they are connected in the open phase.
• Do not connect AC power supply to the transmission line terminal board.
Improper wiring can damage the entire system.
• Do not use crossover power supply wiring for the outdoor unit.
• If the electrical power is inadequate, contact your electric power company.
Install a breaker in a location that is not exposed to high temperatures.
• If the temperature surrounding the breaker is too high, the amperage at which the breaker cuts out may decrease.
• If a control panel is installed outdoors, install a lock so that it cannot be accessed easily.
• To provide power supply lines for multiple outdoor units as shown in Fig. 4.10-1 (Example. 2), use the main
breaker shown in Table 4.10-1.
• Do not fasten the power supply cable and transmission cable together.
• Keep the overall length of the transmission cable within 500 meters. The transmission cable can be extended
up to 2,000 meters through the use of an optional signal amplifier.
• Countermeasure for the static electricity
The static electricity that is charged to the human body can damage the control PC Board when handling the
control PC Board for address setting, etc.
Please keep caution to the following points.
Provide the grounding of Indoor unit, Outdoor unit and Option equipment.
Cut off the power supply (breaker).
* except those units setting while power on, such as UTR-YLLA, UTR-YRPC, etc.
Touch metal part of Indoor & Outdoor unit for more than 10 sec. (No painted portion such as control box), and
discharge static electricity that was charged to human body.
Never touch the component terminal or pattern on the PC Board.
• Caution when wiring cable
When stripping off the coating of lead wire, always use the exclusive tool such as a wire stripper. If there is no
exclusive tool available necessarily, carefully strip the coating by a cutter etc. so that the conductive wire is
not damaged.
If it is damaged, it may lead to an open circuit and a communication error.
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WARNING
CAUTION
18 26/8/2008, 18:23