9
English
9-2 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
ground fault circuit interrupters 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.
9-3
CONTROL BY 2 REMOTE CONTROLLERS (Con-
trolling 1 indoor unit by 2 remote controllers)
• 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)
L1 L2
L1
IN/D OUT/D
F1 F2 F1 F2
Control box
L1 L2
L1L2
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
L1L2
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
L1L2
L1L2
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
L1
Outdoor unit
No. 1
System
Indoor
unit A
Indoor
unit B
Indoor
unit C
Most
downstream
Indoor unit
Power supply
208-230V
60Hz
Power supply
208-230V
60Hz
Power supply
208-230V
60Hz
Power supply
208-230V
60Hz
L2
L2
L1 L2
L1 L2
L1 L2
Indoor unit A
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
L1 L2
Outdoor
unit
No. 2
System
Indoor unit B
Indoor unit C
Most
downstream
indoor unit
For use with 2
remote controllers
Power supply
208-230V
60Hz
Power supply
208-230V
60Hz
Power supply
208-230V
60Hz
Power supply
208-230V
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. 3
L1 L2
L1 L2
L1 L2
L1 L2
IN/D OUT/D
F
1
F
2
F
1
F
2
IN/D
OUT/D
F
1
F
2
F
1
F
2
L1 L2
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
208-230V
60Hz
Indoor unit A
Most
downstream
indoor unit
Power supply
208-230V
60Hz
Control box
Control box
IN/D
OUT/D
F
1
F
2
F
1
F
2
BS unit
Control box
L1
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
L2
L1 L2
L1 L2
Upper part of
remote controller
Lower part of
remote controller
Insert the screwdriver here and gently work
off the upper part of remote controller.
Only one remote
controller needs to be
changed if factory
settings have
remained untouched.
(Factory setting)
S
M
S
S
M
Remote controller
PC board
01_EN_3P086156-13Y.fm Page 9 Wednesday, September 16, 2009 2:22 PM
