Mcu Branch Part Setup Error - Set As Being Used Without Connection To An Indoor Unit - Samsung AM056FN2DEH Series Service Manual

Troubleshooting
4-4-36 MCU branch part setup error – Set as being used without connection to an Indoor unit
Outdoor unit display
Indoor unit display
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
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.
456
MCU BOX #0
OFF
4 2
Branch A B
MCU BOX #1
OFF
4 0
Branch A B
MCU BOX #1
OFF
1 3
B
Branch A
MCU BOX #1
OFF
4 4
B
Branch A
Indoor unit
4
MCU
address setup
0
MCU PCB
ON
Branch part use setup
2 0 5 6
Indoor unit address
C D E F
MCU
address setup
1
MCU PCB
ON
Branch part use setup
1 2 5 7
Indoor unit address
C D E F
1
MCU PCB
ON
7 9 0 0
C D E F
0
MCU address setup
0
MCU PCB
ON
Branch part use setup
2 1 5 6
Indoor unit address
C D E F
2 5 6
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