Midea V8 VRF Series - Page 59

V8 VRF Indoor Units
58
Midea
V8
Series VRF Indoor Units
6.1.15 C11 - Duplicate IDU address code
Error display
Digital display
Display position
Panel or display box
Wired controller
Error code and address
code are displayed
alternately (2)
Error code and address
code flash
simultaneously
Error impact
Faulty IDU: The fan continues running, and the EXV is closed. Other IDUs of the same system: The fan
continues running, the EXV is closed, and error code "A51" is displayed (V6 platform IDU displays the code
"Ed"). Meaning of the code: ODU fault
ODU of the same system:
 stops.
 Error code "C26" is displayed (V6 platform ODU displays the code "H7"). Meaning of the code: IDU qty
decrease fault
Error trigger
Repeated address codes for IDU
Error recovery
Automatic recovery
Possible cause
 Duplicate IDU address code
 The IDU main control board is damaged.
Troubleshooting
C11
Locate the
IDU that reports
repeated addresses.
Is the address
repeated?
Reset the address (1)
Replace the main control
board of the IDU (the
communication circuit of the
main control board is
damaged)
Yes
No
Note:
1. The following table shows the number of addresses and address codes for any IDU with different
HP/capabilities.
Nominal
capacity
(kW)
Horsepower
(HP)
Number
of IDUs
(N)
Number of
addresses
(N)
Address code
Address code to be
queried at the
centralized
controller or wired
controller (★)
kW<20
HP<7
1
1
Address code can
be any integer
from 0 to 63,
denoted by X
X
20≤kW<40
7≤HP<14
1
2
The minimum
address code can
Minimum
address code X