En-10
3.6. Electrical wiring
WARNING
• Electrical work must be performed in accordance with this Manual by a person certi
fi
ed
under the national or regional regulations. Be sure to use a dedicated circuit for the
unit. An insuf
fi
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 over-
heating 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 speci
fi
ed by the
manufacturer. Improper connections, insuf
fi
cient 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, insuf
fi
cient 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 or branch box. 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 an 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.
• 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.
• Use ring terminals and tighten the terminal screws to the speci
fi
ed torques, otherwise,
abnormal overheating may be produced and possibly cause heavy damage inside
the unit.
CAUTION
• Be careful not to generate a spark as follows for using a
fl
ammable refrigerant.
- Do not remove the fuse while the power is on.
- Do not disconnect the wiring while the power is on.
- It is recommended to position the outlet connection in a high position. Place the
cords so that they do not get tangled.
• 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 (ground-
ing) may cause electric shock.
• Install the remote controller cables so as not to be direct touched with your hand.
• Do not connect power supply cables to the transmission or remote controller termi-
nals, 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 an earth (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.
• Be sure to refer to the above diagram for do correct
fi
eld wiring. Wrong wiring causes
malfunction of the unit.
• Check local electrical rules and also any speci
fi
c wiring instructions or limitation.
3.6.1. Wiring system diagram
Y1
Y2
Y3
1
2
R
W
Y1
Y2
Y3
1
2
R
W
B
■
Standard pair
Indoor unit
Indoor unit
Indoor unit
Remote
controller cable
Remote
controller cable
*Earth (Ground) the remote controller if it has a earth (ground) line.
Red
Red
White
White
Black
Wired remote controller
Wired remote controller
Earth (Ground) line
Outdoor unit
Power line
Control line
Connection cable
2-wire type
3-wire type
Wired remote controller cable
■
Flexible multi
Indoor unit
Outdoor unit
Indoor unit
Red
Red
White
White
Black
Earth (Ground) line
Control line
Connection cable
2-wire type
3-wire type
Wired remote controller cable
Power line
Indoor unit
Indoor unit
Remote controller cable
Remote controller cable
*Earth (Ground) the remote controller if it has a earth ground) line.
Wired remote controller
Wired remote controller
UNIT
A
UNIT
B
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2018/12/11 10:11:35
2018/12/11 10:11:35
