Troubleshooting
Samsung Electronics 355
4-4-31 MCU branch part setup error – inconsecutive connection with the use of 2 branch parts
1. How to check
Find an MCU that is composed as the following picture to carry out assembly of branch part again. After completing the re-setting,
press K3 button on the button to reset or turn it off to restart.
MCU BOX #0
MCU PCB
OFF
MCU
address setup
ON
Setting error
Indoor unit
Indoor unit address
Branch part use setup
4 2 1 2 5 6
0
Branch A
4
B
2
C
D E
5
F
6
Outdoor unit display
Indoor unit display
Criteria
• When 2 branch parts are used for one indoor unit without connecting them consecutively.
Cause of problem
• Branch part assembly error
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