En-8
6.3.2. Transmission and Remote controller cable
Transmission cable Remote controller cable
Shield
cable
(no film)
1-3/16 in (30 mm)
1-9/16 in
(40 mm)
1-3/16 in (30 mm)
• When the 2 cables are attached:
GOOD
Different diameter
Connect to 1 side
PROHIBITED
WARNING
Tighten the terminal screws to the specified torques, otherwise, abnormal overheating
may be produced and possibly cause heavy damage inside the unit.
Tightening torque
M3 screw (Transmission /X1, X2)
(Remote controller /Y1, Y2)
4 to 5 lbf·in
(0.5 to 0.6 N·m)
CAUTION
To peel the film from the lead cable, use a dedicated tool that will not damage the
conductor cable.
When installing a screw on the terminal block, do not cut the wire by overtightening the
screw. On the other hand, an under tightened screw can cause faulty contact, which will
lead to a communication failure.
6.4. Connection of wiring
CAUTION
When switching the DIP switch (SW1), be sure to turn off the power supply to the indoor
unit. Otherwise, the PC board of the indoor unit may be damaged.
Do not bundle the remote controller cable, or wire the remote controller cable in parallel,
with the indoor unit connection cable (to the outdoor unit) and the power supply cable. It
may cause erroneous operation.
(1) Remove the control box cover and install each connection cable.
Screw
Control box cover
(2) Connect the connection cable, with the cable tie.
Conduit connector
(L1, L2 (N): Power supply cable)
Y1, Y2:
Remote controller
cable
Cable tie (medium)
(accessories)
X1, X2:
Transmission cable
Attach the conduit connector.
Lock nut
Earth (Ground)
(3) Install control box cover.
(4) Fix the conduit with the supporters as shown below.
Conduit (power supply cable)
Supporter
Indoor unit
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
6.5. Optional parts wiring
6.5.1. Layout of the indoor unit PCB
CAUTION
Do not operate any switches other than prescribed, as it can cause the unit to operate
improperly or malfunction.
Use an insulated screwdriver to set the DIP switches.
CN820
CN65
SW1
SW2
SW3
SW4
CNB01
CNA01
CNA03
CNA02CNA04
Controller PCB
DIP switch
(SET 2)
ON OFF
Power indicator lamp (green)
Name Application
Power indicator lamp (green) Indicates the state of the power supply. Refer to “Power
indicator lamp status” following.
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® convertor (*1)
• Wireless LAN adapter (*1)
CN820 For External power supply unit (*1)
*1: For details, refer to each installation manual.
9371022659-02_L3.indb Sec1:89371022659-02_L3.indb Sec1:8 9/24/2019 11:10:55 AM9/24/2019 11:10:55 AM
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