4-37
OPTIONAL FUNCTION
(4.4 Remote Control Switch)
ATTENTION:
* Pay attention not to overlap addresses.
* Check the number of connected units by using “Test Run Mode”. Test run mode shall be performed after
finishing wiring, refrigerant piping, additional refrigerant charge and other items required for operation.
(4) Check Method of Number of Connected Units
Perform this check after finishing wiring, refrigerant piping, additional refrigerant charge and other
items required for operation.
(a) Test Running Mode
Turn ON the power sources of all units.
Depress the CHECK switch and the MODE switch on the remote control switch simultaneously for
three seconds or longer, to change the unit(s) to the test running mode. (Refer to the checking
procedure by the CHECK switch.)
(b) Number of Units Connected
When the number of units connected is indicated where usually the temperature is indicated, the
system is functioning normally.
(c) False Number of Connected Units is Indicated
When the indicated number of connected units is smaller than the actual number or zero,
presumable causes are as follows:
1) The power source of some units is not turned ON.
2) Incorrect setting of unit numbers was performed.
3) Control wires between units or remote control switch were incorrectly connected regarding
polarity and order.
(d) Ending of Test Running Mode
(5) When the confirmation of the number of connected units and the wiring-checking are finished, end
the test running mode by depressing the “RESET” switch.
(2) Connected unit control wires should not be installed parallel to 200-400V power cables. Fix them by
utilizing bands. It is recommended, that cables be installed at least 30cm away from power cables or
be put into grounded metal pipes.
(3) Set rotary switches RSW on the printed circuit boards of respective units as shown in the following
figure.
[Turn off all power sources!!]
<Setting of Rotary Switches> When indoor units are connected to the same outdoor unit, it is
unnecessary to set rotary switches, because they are automatically addressed.
Rotary
Switch
Setting
Rotary
Switch
Setting
( ): Address Indication
Main Unit
No. 1 Unit
No. 2 Unit
No. 3 Unit
No. 4 Unit
No. 5 Unit
No. 6 Unit
No. 7 Unit
No. 8 Unit
No. 9 Unit
No.10 Unit No.11 Unit No.12 Unit
No.13 Unit No.14 Unit No.15 Unit
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
0 1 2
3
4
5
67
8
9A
B
C
E
F
D
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
( )
