Midea MV5-X400W/V2GN1-AU - E0: Communication Error between Outdoor Units

MCAC-VTSM-2015-10 R410A All DC Inverter V5 X Series 50Hz
Troubleshooting 137
3. Troubleshooting
4.1 E0: Communication error between outdoor units
The error will only display on faulty slave unit, all the ODUs will be on standby.
2-core shielded wire (×)
3-core shielded wire (√)
E0: Communication error between outdoor units
ODU addresses (ENC1) are set incorrectly (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 in one system)
ODU communication wires are connected incorrectly
(all the wires for H1, H2, E connections should be
3-core shielded wire, the wiring should be polarity
connection (H1 connect to H1, H2 connect to H2),
the wiring should not be short circuited)
Outdoor main PCB is damaged
Replace outdoor main PCB
Replace the communication
wires with 3-core shielded
wire, reconnect the
communication wire
Reset the ODU addresses
No
No
Yes
Yes