Samsung AM072/096/120/144FXVAFH, Service Manual

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Troubleshooting
4-44 Samsung Electronics
4-4-13 MCU branch part setup error – Set as being used without connection to an Indoor unit
• Pipe is not installed to the indoor unit with assigned address on MCU
Criteria
Cause of problem
• Occurs when MCU PIPE is set as being used, yet not connected to an indoor unit
Outdoor unit display
Indoor unit display
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 #1
MCU PCB
OFF
ON
1 3 7 9 0 0
1
Branch A
B C D E
0
F
Duct, Cassette (1/2 Way),Console, Celing Cassette (4/Mini4 Way) Wall-mounted (NeoForte)
Operation Defrost Timer Fan Filter/MPI Operation Defrost Timer Filter Operation Timer Turbo 24
℃
27
℃
× × ◑ ◑
×
× ◑ ◑ × × × ◑ ◑ ×
※ ● : ON ◑ : Flash × : OFF