E0: Communication Error Between Outdoor Units; Troubleshooting - Midea VRF V4 Plus I Series Manual

R410A DC Inverter V4 Plus 50Hz
35 L4 MCE error/synchronization/closed-loop
36 L5 Zero-speed protection
37 L6 Reserve
38 L7 Phase sequence error
39 L8 Frequency change over 15Hz one time
40 L9 Setting & actual frequency over 15Hz
41 dF Defrosting(DSP1:Df,DSP2:frequency)
42 d0 Oil returning(DSP1:d0,DSP2:frequency)
43 r1 Lack of refrigerant
44 r2 Obviously lack of refrigerant
45 r3 Seriously lack of refrigerant
46 R1 Lot of refrigerant
47 R2 Too much refrigerant
*The error code of L0-L9 won't display directly on the digital tube, you should press the check button after P6 disappear in one
minute.

5. Troubleshooting

5.1 E0: Communication error between outdoor units (Only display on faulty slave unit, all the ODU in
standby)

E0: Communication error between outdoor units

ODU addresses (ENC1) are set incorrectly (the
master unit address should be set to 0, slave
units addresses should be set from 1 to 3, and
the addresses should not be repeated in one
system)
ODU signal 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
circuit)
MC9S08AC128 chip is disabled
Main board is disabled
94
No
No
No
MCAC-VTSM-2014-04
1. Display in the first two bits of the digital
pipe
2. Judge only when all the indoor units
operate cooling(heating),and keep the last
judged result
Yes
Reset the ODU addresses
Replace the signal wires to
Yes
3-core shielded wire, reconnect
the communication wire
Yes
Replace main board
Troubleshooting