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[ II Restrictions ]
33- 33 -
HWE09080 GB
4. A system in which a system controller is connected to the transmission line for centralized control and which is pow-
ered from a heat source unit <PQHY>
(1) Sample control wiring
(2) Cautions
1) ME 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 heat source units
with each other.
4) Replacement of male power jumper connector (CN41)
must be performed only on one of the heat source units.
5) Short-circuit the shield terminal (S terminal) and the
earth terminal ( ) on the terminal block for transmission
line for centralized control (TB7) on the heat source unit
whose power jumper connector is mated with CN40.
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.
7) When a power supply unit is connected to the transmis-
sion line for centralized control, leave the power jumper
connector on CN41 as it is (factory setting).
(3) Maximum allowable length
1) Indoor-heat source transmission line
Same as [5] 3.
2) Transmission line for centralized control
L31+L32(L21) 200m [656ft]
3) MA remote controller wiring
Same as [5] 1.
4) Maximum line distance via heat source unit
(1.25mm
2
[AWG16] or larger)
L32+L31+L12(L11) 500m [1640ft]
L32+L22(L21) 500m [1640ft]
L12(L11)+L31+L22(L21) 500m[1640ft]
IC
TB5
S
TB
15
1 2
01
IC
TB5
S
TB
15
1 2
02
A B
MA
A B
MA
LC
TB5
S
07
IC
TB5
S
1 2
TB
15
IC
TB5
S
TB
15
1 2
05 04
LC
TB5
S
08
IC
TB5
S
TB
15
1 2
03
A B
MA
IC
TB5
S
TB
15
1 2
06
A B
MA
A B
MA
M1 M2 M1 M2 M1 M2 M1 M2
M1 M2 M1 M2 M1 M2 M1 M2
L12 L11
L22 L21
m3
L31
A B S
L32
Note1
System controller
OC
TB3
TB7
S
51
To be connected
To be left
unconnected
To be left
unconnected
m2 m1
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
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.
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
SW2-1 OFF ON
Group Group Group
Group Group
Interlock operation with
the ventilation unit
Note1 When only the LM adapter is connected,
leave SW2-1 to OFF (as it is).
Note2 LM adapters require the power supply
capacity of single-phase AC 208/230V.
To be left
unconnected
To be left
unconnected
To be left
unconnected
Move the male connector
from CN41 to CN40.