![Midea MVUR252B-VA3 Скачать руководство пользователя страница 128](http://html1.mh-extra.com/html/midea/mvur252b-va3/mvur252b-va3_service-manual_1791261128.webp)
DM14-01.01.18en
MIV V5 Heat Recovery DC Inverter R410A
Installation Procedure
126
The shield net should be grounded at the wiring terminal of outdoor unit. The inlet and outlet wire net of indoor
communication wire should be connected directly and could not be grounded, and form open circuit at the
shield net of final indoor unit.
12.4.1 Signal wire between outdoor unit and indoor unit
Signal wire of indoor/outdoor unit adopts 3-core shielded wire (
≥
0.75mm
2
) which has polarity, please connect
it correctly.
12.4.2 Example connection of wiring
12.4.3 Signal wire of centralized control
When centralized control is needed, one CCM03 (central controller of indoor unit) can only control the indoor
units which are in the same refrigerant system
via the port X Y E of outdoor unit.
The diagram below shows the connection of signal wire in this case:
(P Q E)
MS
MS
MS
MS
(open)
(open)
(open)
P
Q
m
at
chi
ng
re
si
st
or
P
Q
m
at
chi
ng
re
si
st
or
(open)
P
Q
(open)
P
Q
m
at
chi
ng
re
si
st
or
m
at
chi
ng
re
si
st
or
P
Q
m
at
chi
ng
re
si
st
or
To closed end of shield wire
group control
(P Q E)
(H1 H2 E)
(H1 H2 E)
outdoor unit
(master unit)
outdoor unit
(slave unit)
outdoor unit
(slave unit)
outdoor unit
(slave unit)
(H1 H2 E)
All shield terminals of shield wires
should be connected to COMM
terminal
The indoor unit at the end of communication wire shoud be
connected a impedance between port P and port Q