Midea MV5-X252W/V2GN1 Service Manual page 52

4.2.4 Procedure
ODU addresses on switch ENC1 are set
Communication wires between ODUs are
not connected properly
Wires between outdoor main PCB and
electric control box communication
terminals block are loose
Replacing outdoor main PCB resolves the
Replace electric control box
communication terminals block
Notes:
1. The master unit address should be set as 0, slave units addresses should be set from 1 to 3, and the addresses should not be repeated within one system.
Refer to Part 4, 1.1 "PCB Switches and Switch Settings".
2. All the wires for H1, H2, E connections should be three-core shielded cable, the wiring should be connected according to polarity (H1 to H1, etc), the wiring
should not be open or short circuited. Refer to the V5 X Engineering Data Book, Part 2, 5 "Wiring Diagrams" and Part 3, 9.3 "Communication Wiring".
3. Refer to Figures 5-1.2 and 5-1.4 in Part 5, 1 "Outdoor Unit Electric Control Box Layout" and to the V5 X Engineering Data Book, Part 2, 5 "Wiring Diagrams".
4. Refer to Figures 5-1.2 and 5-1.4 in Part 5, 1 "Outdoor Unit Electric Control Box Layout".
201608
E0
1
incorrectly
No
2
No
3
No
error
No
4
Yes
Set the ODU addresses correctly
Ensure the communication wires are
Yes
three-core shielded cable and are
connected properly
Yes
Ensure the wires are connected properly
V5 X VRF 50/60Hz
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