An Example Of A System To Which Both Ma Remote Controller And Me Remote Controller Are Connected - Mitsubishi Electric PQHY-P72TYHMU-A Service Handbook

[ II Restrictions ]

[7] An Example of a System to which both MA Remote Controller and ME Remote Controller are connected

1. PQHY
(1) Sample control wiring
Leave the male
connector on
CN41 as it is.
SW2-1 OFF ON
OS2
53
TB3
M1 M2
TB7
M1 M2
Leave the male
connector on
CN41 as it is.
SW2-1 OFF ON
OS2
56
TB3
M1 M2
TB7
M1 M2
(2) Cautions
1) Be sure to connect a system controller.
2) ME remote controller and MA remote controller cannot
both be connected to the same group of indoor units.
3) Assign to the indoor units connected to the MA remote
controller addresses that are smaller than those of the in-
door units that are connected to the ME remote control-
ler.
4) No more than 2 ME remote controllers can be connected
to a group of indoor units.
5) No more than 2 MA remote controllers can be connected
to a group of indoor units.
6) Do not connect the terminal blocks (TB5) on the indoor
units that are connected to different heat source units
with each other.
7) Replace the power jumper connector of the control board
from CN41 to CN40 on only one of the heat source units.
8) 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.
9) A transmission booster must be connected to a system
in which the total number of connected indoor units ex-
ceeds 20.
10) 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.
11) When a power supply unit is connected to the transmis-
sion line for centralized control, leave the power jumper
HWE09080
L11
Leave the male Move the male connector
connector on
from CN41 to CN40.
CN41 as it is.
SW2-1 OFF ON
SW2-1 OFF ON
OS1 OC
52 51
TB3 TB3
M1 M2 M1 M2
TB7 TB7
S M1 M2 S M1 M2 S
To be left
To be left
unconnected
unconnected
To be connected
L21
Leave the male Leave the male
connector on connector on
CN41 as it is. CN41 as it is.
SW2-1 OFF ON SW2-1 OFF ON
OS1 OC
55 54
TB3 TB3
M1 M2 M1 M2
TB7 TB7
S M1 M2 S M1 M2 S
To be left
To be left
unconnected
unconnected
To be left
unconnected
System controller
A B S
L12
Group
Group
IC IC
01 02
TB5 TB15 TB5 TB15
M1 M2 S 1 2 M1 M2 S 1 2
A B
MA
L22
Group Group
IC IC
03 04
TB5 TB5 TB15 TB5
TB15
M1 M2 S 1 2 M1 M2 S 1 2 M1 M2
A B
A B
104
MA
RC
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.
Note1
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
Same as [5] 4.
3) MA remote controller wiring
Same as [5] 1.
4) ME remote controller wiring
Same as [5] 1.
5) Maximum line distance via heat source unit
2
(1.25mm or larger)
Same as [5] 4.
- 53 - 53
IC
06
TB5 TB15
M1 M2 S 1 2
A B
106
RC
IC
05
TB15
S 1 2
GB