Samsung AM080FXWANR, Service Manual

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Troubleshooting
Samsung Electronics 95
4-3-12 MCU branch part setup error – Overlapping Indoor unit Address setup
1. How to check
Check the setup switch for the number of indoor units in MCU
After completing resetting, press the outdoor unit's K3 button to reset or turn off to restart.
MCU BOX # 0
MCU PCB
OFF
MCU
add r e ss s e tup
ON
In d oor unit add r e ss
Br a n c h p a rt us e s e tup
4 2 2 0 5 6
0
Br a n c h A B C D E F
MCU BOX #1
MCU PCB
OFF
MCU
add r e ss s e tup
ON
In d oor unit add r e ss
Br a n c h p a rt us e s e tup
4 0 1 2 5 7
1
Br a n c h A B C D E F
Outdoor unit
display
Indoorunit
display
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
Judgment
Method
• Occurs when an indoor unit address setup switch in MCU has been overlapped
Cause of
problem
• Repeated indoor unit address
4-3 Appropriate Measures for Different Symptom (cont.)