Samsung AG026MN1DEH Service Manual page 78

Fan coil unit related Error Code
Cause
1
2 E-121
3 E-122
4 E-123
5 E-128
6 E-153
7 E-154
8 E-161
9 E-162
E-163
11
12 E-627
13 E-633
14 E-653
15 E-654
16
Fan coil unit Fan operation error
Error due to confused use of Fahrenheit and Celsius
4-24
Trouble shooting