Samsung AM022FN1DEH/TK Service Manual page 219

Troubleshooting
4-4-30 MCU branch part setup error – Repeated setup for the same address over 3 times
Outdoor unit display
Indoor unit display
Criteria
Cause of problem
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.
4-74
◑(Timer) ◑(Fan)
×(Operation)
The same indoor unit address was setup more than 3 times in MCU
MCU indoor unit address setting error
MCU BOX #0
4
Branch A
Indoor unit
4
◑(Filter)
×(Defrost)
address setup
MCU PCB
ON
OFF
2 2 2 5
Setting error Indoor unit address
B C D E
2 5
MCU
0
Branch part use setup
6
F
6
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