Troubleshooting
Samsung Electronics 4-73
4-4-30 MCU branch part setup error – Repeated setup for the same address over 3 times
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 2 2 5 6
0
Branch A
4
B
2
C
D E
5
F
6
Outdoor unit display
Indoor unit display
×
(Operation)
◑
(Timer)
◑
(Fan)
◑
(Filter)
×
(Defrost)
Criteria • The same indoor unit address was setup more than 3 times in MCU.
Cause of problem • MCU indoor unit address setting error.
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