Troubleshooting
86
Samsung Electronics
4-4-38 MCU branch part setup error – Connect more Indoor units than what is actually set up in MCU
1. How to check
Check the number of indoor units connected to MCU then readjust the switch for the number of units
After completing resetting, press the outdoor unit's K3 button to reset or turn off to restart.
MCU BOX #0
Outdoor unit
PCB
MCU PCB
OFF
MCU address setup
Indoor number setup MCU number setup
ON
Indoor unit address
Branch part use setup
1
2
2
1
8
6
1
6
0
Branch A
1
B
2
C
D
E
8
F
6
MCU BOX #1
MCU PCB
OFF
ON
1
3
7
9
0
0
1
Branch A
B
D
E
0
7
F
2
C
Outdoor unit display
Indoor unit display
Operation
Timer
Criteria
• Occurs when the number of indoor units installed exceeds that registered in MCU
Cause of problem
• Number of indoor units exceeds number of indoor units entered on MCU setting.
