An Example Of A System To Which An Me Remote Controller Is Connected - Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook

[ II Restrictions ]

[6] An Example of a System to which an ME Remote Controller is connected

1. A system in which a system controller is connected to the centralized control transmission line <PQHY>
(1) Sample control wiring
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
OS2
53
TB3
M1M2
TB7
M1M2 S
To be left
unconnected
Leave the male
connector on
CN41 as it is.
SW5-1 OFF ON
OS2
56
TB3
M1M2
TB7
M1M2 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 3 ME 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) Replace the power jumper connector of the control board
from CN41 to CN40 on only one of the heat source units.
5) Provide an electrical path to ground for the S terminal on
the terminal block for centralized control on only one of
the heat source units.
6) A transmission booster must be connected to a system
in which the total number of connected indoor units ex-
ceeds 20.
7) A transmission booster is required in a system to which
more than 16 indoor including one or more indoor units
of the 72 model or above are connected.
Refer to the DATABOOK for further information about
how many booster units are required for a given system.
8) 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).
HWE15150
L11
Move the male connector
Leave the male
from CN41 to CN40.
connector on
SW5-1 OFF ON
CN41 as it is. Group
SW5-1 OFF ON
OS1 OC
52 51
TB3 TB3
M1M2 M1M2
TB7 TB7
M1M2 S M1M2 S
To be left
unconnected
To be connected
L21
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 ON
Group
OS1 OC
55 54
TB3 TB3
M1M2 M1M2
TB7 TB7
M1M2 S M1M2 S
To be left
unconnected
To be left
unconnected
Note1
System controller
A B S
L12
Group
IC IC
01 02
TB5 TB15 TB5 TB15
M1 M2 S 1 2 M1 M2 S 1 2
A B A B
101 102
RC RC
L22
Group
IC IC
04 05
TB5 TB5 TB15
TB15
M1 M2 S 1 2 M1 M2 S 1 2
A B A B
154 104
RC RC
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
Same as [5] 4.
3) ME remote controller wiring
Maximum overall line length
2
(0.3 to 1.25mm [AWG22 to 16])
m1 10m [32ft]
m2+m3 10m [32ft]
If the standard-supplied cable must be extended, use a
cable with a diameter of 1.25mm
of the cable that exceeds 10m [32ft] must be included in
the maximum indoor-heat source transmission line dis-
tance described in 1).
When connected to the terminal block on the Simple re-
mote controller, use cables that meet the following cable
size specifications: 0.75 - 1.25 mm
4) Maximum line distance via heat source unit
2
(1.25mm or larger)
Same as [5] 4.
- 50 -
Interlock operation with
the ventilation unit
Group
LC
IC
03 07
TB5 TB15 TB5
M1 M2 S 1 2 M1 M2 S
A B
103
RC
LC
IC
06 08
TB5 TB15 TB5
M1 M2 M1 M2 S
S 1 2
A B
106
RC
2
[AWG16]. The section
2
[AWG18-14].
GB