Samsung Electronics
92
Troubleshooting
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
address setup
ON
Indoor unit address
Branch part use setup
4
2
2
0
5
6
0
Branch A
B
C
D
E
F
MCU BOX #1
MCU PCB
OFF
MCU
address setup
ON
Indoor unit address
Branch part use setup
4
0
1
2
5
7
1
Branch A
B
C
D
E
F
MCU BOX #1
MCU PCB
OFF
ON
1
3
7
9
0
0
1
Branch A
B
C
D
E
0
F
MCU BOX #1
MCU PCB
OFF
MCU address setup
ON
Indoor unit
Indoor unit address
Branch part use setup
4
4
2
1
5
6
0
Branch A
4
B
C
D
E
5
F
6
2
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.)
