Samsung AM009NNNDCH Series - MCU Branch Part Setup Error - Set as Being Used Without Connection to an Indoor Unit

Troubleshooting
84
Samsung Electronics
4-4-36 MCU branch part setup error – Set as being used without connection to an Indoor unit
1. How to check
Adjust the Dip switch that sets up the use of MCU branch part to ‘Not-Used'. 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
MCU BOX #1
MCU PCB
OFF
ON
1 3 7 9 0 0
1
Branch A B C D E
0
F
MCU BOX #1
MCU PCB
OFF
MCU address setup
ON
Indoor unit
Indoor unit address
Branch part use setup
4 4 2 1 5 6
0
Branch A
4
B
C D E
5
F
62
Outdoor unit display
Indoor unit display
Operation Timer
Criteria
• Occurs when MCU PIPE is set as being used, yet not connected to an indoor unit
Cause of problem
• Pipe is not installed to the indoor unit with assigned address on MCU