Midea V8 Series Manual page 113

Table 3-8.1: Communication connection between ODU and IDUs
Indoor unit generation
All V8 indoor units and unified power
supply
All V8 indoor units and separate power
supply
rd
All 3 generation indoor unit or
3 rd generation indoor unit + V8 indoor
units
Once there is 2 nd generation indoor unit
in the system
Figure 3-8.3: Example of indoor unit and outdoor unit communication line connection
Notes for installers
The communication wires should be connected to the master outdoor unit terminals indicated in Figure 3-8.4 and Table
3-8.2.
Caution
 Communication wiring has polarity. Care should be taken to connect the poles correctly.
Figure 3-8.4: Master outdoor unit communication terminals
8.3.1 The magnetic ring installation
For the system, the EMI effect of the communication line PQ (or PQE) can be improved by adding a magnetic ring. The
magnetic ring needs to be fixed with the communication line (it can be wound for two turns), and placed in the electric
control box and secured with a wire clamp.
Communication connection
type
M1 M2 / P Q
M1 M2
P Q
P Q E

Table 3-8.2: Communication connections
Terminals
X Y E Connect to centralized controller
Communication connection between indoor units and
P Q E
outdoor unit
HyperLink communication connection between indoor
M1 M2
units and outdoor unit
O A Connect to digital energy meter
H1 H2 Reserved
V8 Mini R410A VRF 50Hz
Wire diameter
Length limitation (m)
2
(mm )
2х0.75 2000 / 1200
2х1.5
(1 repeaters are required)
2х0.75
3х0.75
Connection
400
1200
1200
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