Midea VRF V4 Plus I Series User Manual

R410A DC Inverter V4 Plus 50Hz MCAC-VTSM-2014-04
94 Troubleshooting
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
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
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)
Reset the ODU addresses
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)
Replace the signal wires to
3-core shielded wire, reconnect
the communication wire
MC9S08AC128 chip is disabled
Main board is disabled
Replace main board
No
Yes
No
No
Yes
Yes

Midea VRF V4 Plus I Series Specifications

General

Brand	Midea
Model	VRF V4 Plus I Series
Category	Air Conditioner
Language	English