Fujitsu Airstage AJ 072GALBH Series Installation Manual

En-116. ELECTRICAL WIRING6.1. The precautions of electrical wiringWARNINGWiring connections must be performed by a qualified person in accordance with speci-fications.The rated supply of this product is 50 Hz, 400 V of 3-phase, 4-wire. Use a voltage withinthe range of 342 to 456 V.Make sure to perform earthing (grounding) work. Improper earthing (grounding) workcan cause electric shocks.Before connecting the cables, make sure the power supply is OFF.Be sure to install an earth (ground) leakage breaker. Otherwise, it will cause electricshock or fire.Be sure to install a breaker of the specified capacity. When selecting breaker, pleasecomply with the laws and the regulations of each country. One breaker must be installedon the power supply of the outdoor unit. Wrong selection and setup of the breaker willcause electric shock or fire.Do not connect AC power supply to the transmission line terminal board.Improper wiring can damage the entire system.Connect the connector cord securely to the terminal.Faulty installation can cause a fire.Do not modify power cable, use extension cable or branch wiring. Improper use maycause electric shock or fire by poor connection, insufficient insulation or over current.Make sure to secure the insulation portion of the connector cable with the cord clamp. Adamaged 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 electricparts for 10 minutes due to the risk of electric shock.Always use a separate power supply line protected by a circuit breaker operating on allcables with a distance between contact of 3 mm for this unit.Use Ring terminals and tighten the terminal screws to the specified torques, otherwise,abnormal overheating may be produced and possibly cause serious damage inside theunit.Securely install the electrical box cover on the unit. An improperly installed service panelcan cause serious accidents such as electric shock or fire through exposure to dust orwater.If the supply cable is damaged, it must be replaced by the manufacturer, its serviceagent or similarly qualified persons in order to avoid a hazard.CAUTIONThe primary power supply capacity is for the air conditioner itself, and does not include theconcurrent use of other devices.Connect the power cables in positive phase sequence. If they are connected in negativephase sequence, an error will be displayed. If there is a missing phase connection, theunit will not operate normally. Do not connect a N phase (neutral phase) cable to otherphases (misconnection). Wrong wiring will lead to parts damage.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 (Included with earth leakage circuit breaker) in a location that is notexposed to high temperatures.If the temperature surrounding the breaker is too high, the amperage at which thebreaker cuts out may decrease.Use a breaker (Included with earth leakage circuit breaker) that is capable of handlinghigh frequencies. Because the outdoor unit is inverter controlled, a high-frequencybreaker is necessary to prevent a malfunction of the breaker itself.When the electrical switchboard is installed outdoors, place it under lock and key so thatit is not easily accessible.Never bundle the power supply cable and transmission cable, remote control cabletogether. Separate these cables by 50 mm or more. Bundling these cables together willcause miss operation or breakdown.Always keep to the maximum length of the transmission cable. Exceeding the maximumlength may lead to erroneous operation.The static electricity that is charged to the human body can damage the control PCboard when handling the control PC board for address setting, etc.Please keep caution to the following points.Provide the earthing (grounding) of Indoor unit, Outdoor unit and Option equipment.Cut off the power supply (breaker).Touch the metal section (such as the unpainted control box section) of the indoor oroutdoor unit for more than 10 seconds. Discharge the static electricity in your body.Never touch the component terminal or pattern on the PC board.6.2. Wiring method6.2.1 Connection diagramsThe wiring example for RB units, outdoor units and indoor units are shown in the figure.*2 *2*2 *2 *2*1 *1*1*1 *1To other refrigerant circuitoutdoor unitPower supply400V 3Ø 50HzOutdoor unit 1(Master unit)Power supplyRB unitIndoor unitIndoor unit Indoor unit Indoor unitIndoor unit(cooling only)RB unitRefrigerant pipingPower supply Power supplyTransmission Transmission TransmissionOutdoor unit 2(Slave unit 1)Outdoor unit 3(Slave unit 2)Breaker Breaker BreakerPower supply400V 3Ø 50HzPower supply400V 3Ø 50HzPower supply Power supplyBreaker BreakerBreakerBreaker Breaker BreakerBreakerTransmissionTransmission Transmission TransmissionTransmissionPower supply230V 1Ø 50HzPower supply230V 1Ø 50HzPower supply230V 1Ø 50HzPower supply230V 1Ø 50HzPower supply230V 1Ø 50HzPower supply230V 1Ø 50HzPower supply230V 1Ø 50HzPowersupplyPowersupplyPowersupplyPowersupplyPowersupplyRemotecontrolRemotecontrolRemotecontrolRemotecontrolRemotecontrolRemotecontroller(2-wire)Remotecontroller(2-wire)Remotecontroller(2-wire)Remotecontroller(3-wire)Remotecontroller(3-wire)*1: The number of power supply terminals is different depending on the indoor unitmodel. For the wiring, refer to the indoor unit installation manual.*2: Earth (Ground) the remote controller if it has an earth (ground) cable.• There are two types of remote controller: the 2-wire type and the 3-wire type. For details,see the relevant remote controller installation manual. (When connecting the 2-wire typeremote controller, Y3 is not used.)