Troubleshooting
4-68 Samsung Electronics
4-4-33 MCU branch part setup error – Overlapping Indoor unit Address setup
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.
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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