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[ II Restrictions ]
31- 31 -
HWE08040 GB
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) A transmission booster is required in a system to which
more than 32 indoor units (26 units if one or more indoor
units of the 72 model or above is connected) are con-
nected.
(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
1 2
01
IC
TB5
S
TB
15
1 2
03
A B
MA
A B
MA
LC
TB5
S
07
IC
TB5
S
1 2
TB
15
IC
TB5
S
TB
15
1 2 1 2
0402
IC
TB5 TB15
S
05
A B
MA
IC
TB5
S
TB
15
1 2
06
A B
MA
Group
Group
Group
Group
M1M2 M1 M2 M1 M2 M1 M2
M1M2M1M2
M1M2
m2
m3
Interlock operation with
the ventilation unit
L12
L22
L11
L21
OC
TB3
TB7
S
51
Connect
Not
connect
Not
connect
OS1
TB3
TB7
S
52
OS2
TB3
TB7
M1 M2 M1 M2 M1 M2
M1 M2 M1 M2 M1 M2
S
53
OC
TB3
TB7
S
54
OS1
TB3
TB7
S
55
OS2
TB3
TB7
M1 M2 M1 M2 M1 M2
M1 M2 M1 M2 M1 M2
S
56
L31
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
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
SW2-1 OFF
CN41 CN40 Replace
Not
connect
Not
connect
Not
connect