Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 43

[ II Restrictions ]
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
Leave the male Leave the male
connector on connector on
CN41 as it is.
CN41 as it is.
SW5-1 OFF ON SW5-1 OFF
OS2
53
TB3
M1 M2
TB7
M1 M2 S
To be left
unconnected
Leave the male
Leave the male
connector on connector on
CN41 as it is. CN41 as it is.
SW5-1 OFF ON SW5-1 OFF
OS2
56
TB3
M1 M2
TB7
M1 M2 S
To be left
unconnected
(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).
Refer to the DATABOOK for further information about
how many booster units are required for a given system.
HWE15150
L11
Move the male connector
from CN41 to CN40.
SW5-1 OFF ON Group
ON
OS1 OC
52 51
TB3 TB3
TB5
M1 M2 M1 M2
M1 M2
TB7 TB7
M1 M2 S M1 M2 S
To be left
unconnected
To be connected
L21
Leave the male
connector on
CN41 as it is.
ON SW5-1 OFF ON
Group
OS1 OC
55 54
TB3 TB3
TB5
M1 M2 M1 M2
M1 M2
TB7 TB7
M1 M2 S M1 M2 S
To be left
unconnected
To be left
unconnected
Note1
System controller
A B S
L12
Group
IC IC
01 02
TB15 TB5 TB15
S 1 2 M1 M2 S 1 2
A B A B
MA MA
L22
Group
IC IC
04 05
TB5 TB15
TB15
S 1 2 M1 M2 S 1 2
A B
MA
m3
Note1 When only the LM adapter is connected,
leave SW5-1 to OFF (as it is).
Note2 LM adapters require the power supply
capacity of single-phase AC 208/230V.
(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
2
(1.25mm [AWG16] or larger)
L32+L31+L12(L11)
L32+L22(L21) 500m [1640ft]
L12(L11)+L31+L22(L21)
- 34 -
Interlock operation with
the ventilation unit
Group
LC
IC
03 07
TB5 TB15 TB5
M1 M2 S 1 2 M1 M2 S
A B
MA
LC
IC
06 08
TB5 TB15 TB5
M1 M2 S 1 2 M1 M2 S
A B
MA
500m [1640ft]
500m[1640ft]
GB