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

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Troubleshooting
4-40 Samsung Electronics
4-4-9 MCU branch part setup error – Repeated setup for the same address over 3 times
• MCU indoor unit address setting error
Criteria
Cause of problem
• The same indoor unit address was setup more than 3 times in MCU
Outdoor unit display
Indoor unit display
1. How to check
Find an MCU that is composed as the following picture to carry out assembly of branch part again. After completing the re-setting,
press K3 button on the button to reset or turn it off to restart.
Outdoor Unit PCB
Quantity of
Indoor Unit
Quantity of
MCU
Indoor Unit: 3 MCU: 1
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
Branch A