Electrical Wiring - Fujitsu 9379123037-02 Installation Insrtuctions

6. ELECTRICAL WIRING

Cable Cable size (mm
Connection cable 1.5 (MIN.)
Max. Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is
2% or more.
• Install all electrical works in accordance to standard.
•
Install the disconnect device with a contact gap of at least 3mm in all poles nearby
the units. (Both indoor unit and outdoor unit)
•
Wiring size must comply with the applicable country or region's regulations.
• Electrical work must be performed in accordance with this Manual by a person
certifi ed under the national or regional regulations. Be sure to use a dedicated circuit
for the unit.
An insuffi cient power supply circuit or improperly performed electrical work can cause
serious accidents such as electric shock or fi re.
• Before starting work, check that power is not being supplied to the indoor unit and
outdoor unit.
• For wiring, use the prescribed type of cables, connect them securely, making sure
that there are no external forces of the cables applied to the terminal connections.
Improperly connected or secured cables can cause serious accidents such as
overheating the terminals, electric shock, or fi re.
• Securely install the electrical box cover on the unit.
An improperly installed electrical box cover can cause serious accidents such as
electric shock or fi re through exposure to dust or water.
• Install sleeves into any holes made in the walls for wiring. Otherwise, a short circuit
could result.
• Use the included connection cables and power cables or ones specified by the
manufacturer. Improper connections, insufficient insulation, or exceeding the
allowable current can cause electric shock or fi re.
• Do not modify the power cables, use extension cables, or use any branches in the
wiring. Improper connections, insufficient insulation, or exceeding the allowable
current can cause electric shock or fi re.
• Match the terminal block numbers and connection cable colors with those of the
outdoor unit. Erroneous wiring may cause burning of the electric parts.
• Securely connect the connection cables to the terminal board. In addition, secure the
cables with wiring holders. Improper connections, either in the wiring or at the ends
of the wiring, can cause a malfunction, electric shock, or fi re.
• Always fasten the outside covering of the connection cable with the cable clamp. (If
the insulator is chafed, electric leakage may occur.)
• Install a earth leakage breaker. In addition, install the earth leakage breaker so that
the entire AC main power supply is cut off at the same time. Otherwise, electric shock
or fi re could result.
• Always connect the earth (ground) cable.
Improper earthing (grounding) work can cause electric shocks.
• Install the remote controller cables so as not to be direct touched with your hand.
• Perform wiring work in accordance with standards so that the air conditioner can be
operated safely and positively.
• Connect the connection cable fi rmly to the terminal board. Imperfect installation may
cause a fi re.
• Earth (Ground) the unit.
Do not connect the earth (ground) cable to a gas pipe, water pipe, lightning rod, or a
telephone earth (ground) cable.
Improper earthing (grounding) may cause electric shock.
• Do not connect power supply cables to the transmission or remote controller
terminals, as this will damage the product.
• Never bundle the power supply cable and transmission cable, remote controller cable
together.
Separate these cable by 50 mm or more.
Bundling these cables together will cause miss operation or breakdown.
• When handling PCB, static electricity charged in the body may cause malfunction of
the PCB. Follow the cautions below:
• Establish a ground for the indoor and outdoor units and peripheral devices.
• Cut power (breaker) off.
• Touch metal part of the indoor and outdoor units for more than 10 seconds to
discharge static electricity charged in the body.
• Do not touch terminals of parts and patterns implemented on PCB.
9379123037-02.indb 7 9379123037-02.indb 7
2 ) Type Remarks
Type 60245 IEC57 3Cable+earth (ground),
1φ230V
WARNING
CAUTION
(1) Use ring terminals with insulating sleeves as shown in the fi gure below to connect to
the terminal block.
(2) Securely clamp the ring terminals to the cables using an appropriate tool so that the
cables do not come loose.
(3) Use the specifi ed cables, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws.
Do not use a screwdriver that is too small, otherwise, the screw heads may be
damaged and prevent the screws from being properly tightened.
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
(6) See the table for the terminal screw tightening torques.
(7) Please do not fi x 2 power supply cables with 1 screw.
Screw with
special washer
Ring terminal
Cable
Terminal block
WARNING
• Use ring terminals and tighten the terminal screws to the specifi ed torques, otherwise,
abnormal overheating may be produced and possibly cause heavy damage inside
the unit.
Tightening torque [N·m (kgf·cm)]
M4 screw
M5 screw
Ring terminal
Sleeve
Screw with
special washer
Ring
terminal
Cable
1.2 to 1.8
(12 to 18)
2.0 to 3.0
(20 to 30)
En-7
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