66
Commissioning Cycle Error Codes:
Error Code
Content
Error Code
Content
U0
Preheat time of compressor is
insufficient
C6
Alarm because ODU quantity is
inconsistent
U2
Wrong setting of ODU’s capacity
code/jumper cap
C7
Abnormal communication of
converter
U3
Power supply phase sequence
protection
C8
Emergency status of compressor
U4
Refrigerant-lacking protection
C9
Emergency status of fan
U5
Wrong address for driving board of
compressor
CA
Emergency status of module
U6
Alarm because valve is abnormal
CH
Rated capacity is too high
U8
Malfunction of pipeline for IDU
CC
No main unit
U9
Malfunction of pipeline for ODU
CL
The matching ratio of rated capacity
for IDU and ODU is too low
UC
Setting of main IDU is succeeded
CE
Communication malfunction
between mode exchanger and IDU
UL
Emergency operation DIP switch
code of compressor is wrong
CF
Malfunction of multiple main control
units
UE
Charging of refrigerant is invalid
CJ
Address DIP switch code of system
is shocking
UF
Identification malfunction of IDU of
mode exchanger
CP
Malfunction of multiple wired
controller
C0
Communication malfunction between
IDU, ODU and IDU’s wired controller
CU
Communication malfunction
between IDU and the receiving lamp
C1
Communication malfunction between
main control and DC-DC controller
Cb
Overflow distribution of IP address
C2
Communication malfunction between
main control and inverter compressor
driver
Cd
Communication malfunction
between mode exchanger and ODU
C3
Communication malfunction between
main control and inverter fan driver
Cn
Malfunction of network for IDU and
ODU of mode exchanger
C4
Malfunction of lack of IDU
Cy
Communication malfunction of mode
exchanger
C5
Alarm because project code of IDU is
inconsistent
Lennox
VRF Unit
