10
English
9-3
WIRING EXAMPLE
• Fit the power supply wiring of each unit with a switch and fuse
as shown in the drawing.
COMPLETE SYSTEM EXAMPLE (3 systems)
1. When using 1 remote controller for 1 indoor unit. (Nor-
mal operation)
2. For group control or use with 2 remote controllers
3. When including BS unit
[ PRECAUTIONS ]
1. A single switch can be used to supply power to units on the
same system. However, branch switches and branch circuit
breakers must be selected carefully.
2. Do not ground the equipment on gas pipes, water pipes or
lightning rods, or crossground with telephones. Improper
grounding could result in electric shock.
9-4
CONTROL BY 2 REMOTE CONTROLLERS
(Controlling 1 indoor unit by 2 remote control-
lers)
• When using 2 remote controllers, one must be set to “MAIN”
and the other to “SUB”.
MAIN/SUB CHANGEOVER
(1)
Insert a
screw driver into the recess between the upper
and lower part of remote controller and, working from the 2
positions, pry off the upper part.
The remote controller PC board is attached to the upper
part of remote controller.
(2)
Turn the MAIN/SUB changeover switch on one of the two
remote controller PC boards to “S”.
(Leave the switch of the other remote controller set to “M”.)
Power supply wiring
Transmission wiring
Switch
Fuse
Power supply
Main
switch
Remote controller
Indoor unit
BS unit
(Only for
Heat
recovery system)
L N
IN/D OUT/D
F1 F2 F1 F2
Control box
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
Outdoor unit
No. 1
System
Indoor
unit A
Indoor
unit B
Indoor
unit C
Most
downstream
Indoor unit
Power supply
220-240V
50Hz
or
220V
60Hz
L N
L N
L N
L N
IN/D OUT/D
F
1
F
2
F
1
F
2
Control box
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
P
1
P
2
L N
Outdoor unit
No. 2
System
Indoor unit A
Indoor unit B
Indoor unit C
Most
downstream
indoor unit
For use with 2
remote controllers
Power supply
220-240V
50Hz
or
220V
60Hz
Note: It is not necessary to designate
indoor unit address when using
group control.
The address is automatically set
when power is activated.
Fig. 5
L N
L N
L N
L N
IN/D OUT/D
F
1
F
2
F
1
F
2
IN/D
OUT/D
F
1
F
2
F
1
F
2
L N
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
BS unit
No. 3
System
Outdoor unit
Power
supply
220-240V
50Hz
or
220V
60Hz
Indoor unit A
Most
downstream
indoor unit
Control box
Control box
IN/D
OUT/D
F
1
F
2
F
1
F
2
BS unit
Control box
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
L N
L N
Upper part of
remote controller
Lower part of
remote controller
Insert the screwdriver here and gently work
off the upper part of remote controller.
S
M
S
S
M
Remote controller
PC board
(Factory setting)
Only one remote controller
needs to be changed if
factory settings have
remained untouched.
01_EN_3P258319-8N.fm Page 10 Tuesday, February 19, 2019 1:06 PM
