Troubleshooting
4-30 Samsung Electronics
4-3-13 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 #1
MCU PCB
OFF
ON
1 3 7 9 0 0
1
Branch A
B C D E
0
F
Outdoor unit
display
Indoorunit
display
Duct, Cassette (1/2 Way),Console, Celing Cassette (4/Mini4 Way) Wall-mounted (NeoF orte)
Operation Defrost Timer F an F ilter/MPI Operation Defrost Timer Filter Operation Timer Turbo
24℃ 27℃
××◑◑×
×◑◑×××◑
◑×
※ ●: ON ◑: Flash ×: OFF
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
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