En-7
5.4. Wiring
(1) Open the intake grille. Refer to “8. FRONT
PANEL REMOVAL AND INSTALLATION”.
(2) Remove the wire cover.
(3) Connect the end of the connection cable
fully into the terminal block.
(4) Remove the conduit holder.
(5) Fasten the indoor unit wire harness to the
conduit holder using the lock nut.
(6) Use the screws to install the conduit holder
provide with the indoor unit.
Screw
Wire cover
Screw
Conduit holder
Conduit connector
• Transmission cables
• Wired remote controller
cable and optional parts
cables (if necessary)
Lock nut
L1
X1
Y1 Y2
X2
L2
A
B
C
D
F
E
H
G
Symbol Connection cable
A
L1 Power supply cable
B
L2
C
Earth (ground) for
power supply cable
D
Earth (ground) for
transmission cable,
wired remote control-
ler cable (if neces-
sary) and EV kit cable
(EEV external model
only)
E
X1 Transmission cable
F
X2
G
Y1 Wired remote control-
ler cable (nonpolar)
H
Y2
Cable clamp
(Clamp only the power
supply cable)
(7) Fix the conduit with the supporters as shown below.
Conduit (Power supply cable)
Indoor unit
Supporter
30 in
(756 mm)
or less
54 in
(1,361 mm)
or less
54 in
(1,361 mm)
or less
54 in
(1,361 mm)
or less
5.5. Optional parts wiring
In this setting, you need to remove the front panel. Refer to “8. FRONT PANEL REMOVAL
AND INSTALLATION”.
5.5.1 Layout of the indoor unit PCB
CNA04
CNA03 CNA01 CNB01 CN65
CN820
CNA02
SW2
DIP switch
(SET 2)
ON OFF
Power indicator
lamp (green)
Name Application
CNA01
Apply voltage terminal For external input
CNA03
CNA02 Dry contact terminal
CNA04
DIP switch SET 2 (SW2) Input signal type switching
CNB01 Output terminal For external output
CN65 For one of the following.
• Modbus® converter (*1)
• Wireless LAN adapter (*1)
CN820 For External power supply unit (*1)
*1: For details, refer to each installation manual.
5.5.2. Power indicator lamp status
Power indicator lamp (Green) Status contents
Lit Lit when the power is turned on.
Fast blinking (every 0.1 sec-
ond)
There is a fault with the communication board or the
main board.
Blinking (repeat 3 seconds ON
and 1 second OFF)
The indoor unit is turned off and power is supplied
from the External power supply unit (optional) to the
indoor unit PCB.
5.5.3. Connection methods
Wire modification for External
input/output wire
(1) Remove insulation from wire at-
tached to wire kit connector.
(2) Remove insulation from field
supplied cable. Use crimp type
insulated butt connector to join field
cable and wire kit wire.
(3) Connect the wire with connecting
wire with solder.
IMPORTANT:
Be sure to insulate the connection between the
wires.
Locally
purchased
Solder and insulate the connected parts.
Wire kit connector
(optional parts)
Wiring arrangement
In following figure, all the possible connectors are connected for description.
In actual installation, you cannot connect all the connectors at once.
(1) Hang the wire on the hooks.
(2) After attaching the cover, push the wire into the gap.
Hooks
Connecting cables
Controller PCB
Cover
When replacing the control box cover,
be sure to attach the wire with the
screw.
Wire
Control
box cover
Screw
9373370499_IM.indb 79373370499_IM.indb 7 7/28/2020 10:26:21 AM7/28/2020 10:26:21 AM
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