Midea V8 PRO Series - Page 47

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Keep the power on/off for all IDUs.
Do not connect the HyperLink (M1 M2) communication line to the PQ or D1D2 communication line.
If the HyperLink (M1 M2) communication is available and is required in the system, you will need to enable the function
on the master ODU. For details, refer to section 7.5.
The communication wiring (M1 M2) must through the magnetic ring from the main board to the IDUs.
When the system selects HyperLink (M1M2) communication, it is forbidden to connect build-out resistor to the end
indoor unit, otherwise the communication will fail.
CAUTION
If the total distance is less than or equal to 200m and the total number of IDUs is less than or equal to 10 sets, the
valve is powered and controlled by the master ODU.
If the total distance is longer than 200m or the total number of IDUs is more than 10 sets, a repeater is required to
increase the bus voltage.
The load capacity of the repeater is the same as that of the ODU, and it can load a bus length of 200m or 10 IDUs.
A maximum of two repeaters can be installed in the same refrigerant system.
The number of IDUs requiring power supply in the same refrigerant system is less than or equal to 30 sets.
Keep the power on/off for both the repeater and the ODUs, or use an uninterruptible power supply with the repeater.
For repeater installation, please refer to the repeater installation manual. Do not connect the upstream and
downstream IDU ports of the repeater in reverse; otherwise, it will cause a communication failure.
If the separate power supply function needs to be enabled in the system, it must be enabled on the master ODU. For
details, refer to section 7.5.
When the system selects HyperLink (M1M2) communication, it is forbidden to connect build-out resistor to the end
indoor unit, otherwise the communication will fail.
CAUTION
HyperLink (M1 M2) communication wiring configuration – IDUs with separate power supply
M1 M2
M1
M2
TO UP IDU
TO DOWN IDU
M1 M2
M1 M2
L
N
···
(2-9)# IDU
M1
M2
M1
M2
TO UP IDU
TO DOWN IDU
M1
M2
L
N
M1
M2
L
N
M1 M2
L
N
···
22-28#IDU
breaker
Breaker
M1
M2
L
N
M1
M2
L
N
Breaker
Breaker
M1
M2
L
N
Breaker
Breaker
L1
La
Lx
L11
Lb
Ly
L21
Lc
L30
···
12-19# IDU
Master ODU
Breaker
N L
N L
N L N L
N L
N L
N L
10# IDU
20# IDU
11# IDU
30# IDU
29# IDU
21# IDU
1# IDU
Power wire
Communication wire
Repeater 1
Repeater 2
L1+La+Lx≤200m, L11+Lb+Ly≤200m, L21+Lc+L30≤200mm. Communication wiring 2*1.5mm
2
Figure 5.45