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4-4-35 MCU branch part setup error – Overlapping Indoor unit Address setup
Outdoor unit display
Indoor unit display
Criteria
• Occurs when an indoor unit address setup switch in MCU has been overlapped
Cause of problem
• Repeated indoor unit address
1. How to check
Check 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.
Samsung Electronics
MCU BOX #0
MCU PCB
OFF
4
2
2
0
Branch A
B
C
D
MCU BOX #1
MCU PCB
OFF
4
0
1
2
Branch A
B
C
D
MCU BOX #1
MCU PCB
OFF
1
3
7
9
B
C
Branch A
MCU
address setup
0
ON
Branch part use setup
5
6
Indoor unit address
E
F
MCU
address setup
1
ON
Branch part use setup
5
7
Indoor unit address
E
F
1
ON
0
0
D
E
F
0
Troubleshooting
455
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Troubleshooting
