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6.5. Wiring method
6.5.1 Connection diagrams
Power supply: 230V 1Φ 50Hz
L
N
Breaker
Outdoor
L
N
unit
Power supply
Transmission
Indoor unit
Transmission
Transmission
Remote control
Power supply
Power supply
*1
*1
*2
Breaker
Breaker
Power supply
Remote
Power supply
230V 1Φ 50 Hz
230V 1Φ 50 Hz
controller
(2-wire)
*1: The number of power supply terminals is different depending on the indoor unit
model. 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 type
remote controller, Y3 is not used.)
The wiring example for outdoor and indoor units is shown in figure.
6.5.2 Wiring procedure
• Remove the service panel. And connect the cable to the terminal in accordance with the
terminal name plate.
• Use a ring terminal to connect the electric cables to the power supply terminal board.
• Keep the earth cable longer than the other cables.
• After connecting the electric cable, secure them with a cable clamp.
• Connect the cable without applying excessive tension.
• Use the specified cable type and connect the cable securely.
Secure with a cable
Tightening torque
clamp as shown in the
[N·m (kgf·cm)]
figure below.
Transmission terminal (M3)
Cable tie (accessory)
Transmission cable
En-9
Breaker:
(1) Earth leakage circuit breaker
(2) Current breaker (over current)
To other refrigerant circuit outdoor unit
Indoor unit
Transmission
Remote control
Power supply
*1
Breaker
*2
Remote
Power supply
230V 1Φ 50 Hz
controller
(2-wire)
M3 screw
0.5 to 0.6 (5 to 6)
M5 screw
2.0 to 3.0 (20 to 30)
Power supply terminal
Ring terminal
(M5)
Earth cable
Cable clamp
Cable clamp
Cable tie (accessory)
Power supply cable
How to connect wiring to the terminal
Caution when wiring cable
(1) Use ring terminals with insulating sleeves as shown in the figure 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 specified 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 screw-
driver 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 below for the terminal screw tightening torques.
Strip: 10 mm
Indoor unit
Cable
Remote control
*2
Shielding the transmission cable
Connect both ends of the shielded
wire of the transmission cable to
the earth (ground) terminal of the
Remote
equipment or to the earth (ground)
controller
screw near the terminal.
(3-wire)
Be sure to use one side of a twisted
pair cable when using transmission
cable with 2 sets of twisted pair
cables.
6.6. External input and external output
6.6.1 Terminal position
Outdoor unit
PC board
Input 5
(CN135: Orange)
Output 1
(CN136: Black)
Output 2
(CN137: Blue)
Do not bundle the cable for base pan heater with other cables.
Ring terminal
Screw with
special washer
Ring terminal
Terminal block
Wind with insulation tape to prevent short circuit
Use one side
Connect both ends of shielded
of the twisted
wire to earth (Ground).
pair cable
Base pan heater
(CN115:Black)
BASE HEATER
CN115 (BLK)
CN134
EXT.
IN. 4
(RED)
CN133
PULSE
EXT.
IN
IN. 3
(ORG)
(WHT)
CN132
EXT.
EXT.
OUT. 1
IN. 2
(BLK)
(GRN)
CN131
EXT.
EXT.
OUT. 2
IN. 1
(BLU)
(YEL)
CAUTION
Sleeve
Screw with
special washer
Ring terminal
Cable
Input 4
(CN134:Red)
Input 3
(CN133:White)
Input 2
(CN132:Green)
Input 1
(CN131:Yellow)
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