Troubleshooting
Samsung Electronics 4-67
4-4-33 MCU branch part setup error – Overlapping Indoor unit Address setup
1. How to check
C
heck the setup switch for the number of indoor units in MCU
After completing resetting, press the outdoor unit's K3 button to reset or turn off to restart.
MCU BOX #0
MCU PCB
OFF
MCU
address setup
ON
Indoor unit address
Branch part use setup
4 2 2 0 5 6
0
Branch A B C D E F
MCU BOX #1
MCU PCB
OFF
MCU
address setup
ON
Indoor unit address
Branch part use setup
4 0 1 2 5 7
1
Branch A B C D E F
• Repeated indoor unit address
Criteria
Cause of problem
• Occurs when an indoor unit address setup switch in MCU has been overlapped
Outdoor unit display
Indoor unit display
×
(Operation)
◑
(Timer)
◑
(Fan)
◑
(Filter)
×
(Defrost)
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