S2S KNX Gateway
31
9 Error Code
Note: when error occurs in the air conditioner, please turn off the air
conditioner and ask professional personnel to maintain.
9.1 Error Code List of ODU
Error Code Content Error Code Content
E0 Malfunction of ODU J8
High system pressure
ratio protection
E1 High-voltage protection J9
Low system pressure
ratio protection
E2
Air discharge low-
temperature protection
JA
Pressure error
protection
E3 Low-voltage protection JC
Water ow switch
protection
E4
High air discharge
temperature protection
of compressor
JL
Low pressure
protection
F0
Mainboard of ODU is
faulted
b2
Defrosting temperature
sensor 1 error
F1
High-pressure sensor
error
b3
Defrosting temperature
sensor 2 error
F3
Low-pressure sensor
error
JE
Oil-return tube is
blocked
F5
Air discharge
temperature sensor
error of compressor 1
JF
Oil-return tube is
leaking
F6
Air discharge
temperature sensor
error of compressor 2
b1
Outdoor ambient
temperature sensor
error
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