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[ II Restrictions ]
GBHWE0803A
5. An example of a system in which a system controller is connected to the indoor-outdoor transmission line (except
LM adapter)
(1) Sample control wiring
(2) Cautions
1) M-NET remote controller and MA remote controller cannot both be
connected to the same group of indoor units.
2) No more than 2 MA remote controllers can be connected to a group
of indoor units.
3) Do not connect the terminal blocks (TB5) on the indoor units that are
connected to different outdoor units with each other.
4) Replacement of male power jumper connector (CN41) must be per-
formed only on one of the outdoor units.
5) Provide grounding to S terminal on the terminal block for transmis-
sion line for centralized control (TB7) on only one of the outdoor
units.
6) A maximum of 3 system controllers can be connected to the indoor-
outdoor transmission line, with the exception that only one G(B)-50A
may be connected.
7) When the total number of indoor units exceeds 20 (12 if one or more
indoor units of the 72 model or above is connected), it may not be
possible to connect a system controller to the indoor-outdoor trans-
mission line.
8) When the number of the connected indoor units is as shown in the
table below, one or more transmission boosters (sold separately)
are required.
To connect two transmission boosters, connect them in parallel.
(Observe the maximum number of connectable indoor units that are
listed in the specifications for each outdoor unit.)
The table above shows the number of transmission boosters that is
required by the system with three BC controllers. For each BC con-
troller that is subtracted from the above-mentioned system, two ad-
ditional indoor units can be connected.
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Maximum distance (1.25mm
2
[AWG16] or larger)
L11+L12 200m [656ft]
L21+L22 200m [656ft]
L25 200m [656ft]
2) Transmission line for centralized control
Maximum line distance via outdoor unit
(1.25mm
2
[AWG16] or larger)
L25+L31+L12(L11) 500m [1640ft]
L12(L11)+L31+L22(L21) 500m [1640ft]
3) MA remote controller wiring
Same as [5] 1.
IC
TB5
S
TB
15
12
01
IC
TB5
S
TB
15
12
02
A
1
B
2
MA
A
1
B
2
MA
LC
TB5
S
07
IC
TB5
S
12
TB
15
IC
TB5
S
TB
15
12
0504
LC
TB5
S
08
IC
TB5
S
TB
15
12
03
A
1
B
2
MA
IC
TB5
S
TB
15
12
06
A
1
B
2
MA
A
1
B
2
MA
GroupGroupGroup
Group Group
m3
Interlock operation with
the ventilation unit
OC
Connect
m2 m1
Note1 LM adapters cannot be connected to the
indoor-outdoor transmission line.
TB3
TB7
S
51
OS
TB3
TB7
S
52
OC
TB3
TB7
S
55
OS
TB3
TB7
S
56
L31
ABS
L25
M2M1 M2M1
M2M1
M2M1
M2M1
M2M1 M2M1
M2M1 M2M1
M2M1
M2M1
M2M1M2M1
M2M1
M2M1
M2M1
M2M1
M2M1
Not
Connect
Not
Connect
Not
Connect
CN41 CN40 Replace
SW2-1 OFF ON
SW2-1 OFF ON
Leave the male
connector on
CN41 as it is.
SW2-1 OFF ON
Leave the male
connector on
CN41 as it is.
SW2-1 OFF ON
Leave the male
connector on
CN41 as it is.
System controller
Note1
S
BC
TB02
53
S
BC
TB02
57
L22
L21
L12
L11
Number of transmission
booster (sold separately)
required
1 unit 2 units
When the P72 and P96 models are not in-
cluded in the connected indoor units
27 - 50
units
-
When the P72 and P96 models are includ-
ed in the connected indoor units
21 - 39
units
40 - 50
units