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[ II Restrictions ]
GBHWE0803A
3. Group operation of units in a system with multiple outdoor units
(1) Sample control wiring
(2) Cautions
1) M-NET remote controller and MA remote controller can-
not 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 performed only on one of the outdoor units.
5) Provide grounding to S terminal on the terminal block for
transmission line for centralized control (TB7) on only
one of the outdoor units.
6) 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 left table shows the number of transmission boost-
ers that is required by the system with three BC control-
lers. For each BC controller that is subtracted from the
above-mentioned system, two additional 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]
2) Transmission line for centralized control
Maximum line distance via outdoor unit
(1.25mm
2
[AWG16] or larger)
L12+L31+L22 500m [1640ft]
L11+L31+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
03
A1 B2
MA
A1 B2
MA
LC
TB5
S
07
IC
TB5
S
12
TB
15
IC
TB5
S
TB
15
12 12
0402
IC
TB5 TB15
S
05
A1 B2
MA
Group
IC
TB5
S
TB
15
12
06
A1 B2
MA
GroupGroup
Group
Not
Connect
Not
Connect
m2
m3
Interlock operation with
the ventilation unit
L12
L22
L11
L21
OC
Connect
CN41 CN40 Replace
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
TB3
TB7
S
51
OS
TB3
TB7
M1 M2
M1 M2
M1 M2
M1 M2
M1 M2
M1M2 M1M2
M1M2
M1M2
M1M2
M1M2
M1M2
M1 M2M1 M2
M1 M2
M1 M2
M1 M2
S
52
OC
TB3
TB7
S
55
OS
TB3
TB7
S
56
L31
S
S
BC
TB02
53
BC
TB02
57
Not
Connect
Number of transmission
booster (sold separately) re-
quired
1 unit 2 units
When the P72 and P96 mod-
els are not included in the
connected indoor units
27 - 50 units -
When the P72 and P96 mod-
els are included in the con-
nected indoor units
21 - 39 units 40 - 50 units