Troubleshooting
Samsung Electronics
4-73
4-4-30 MCU branch part setup error – Repeated setup for the same address over 3 times
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.
MCU
BO
X #
0
M
C
U P
C
B
OFF
MCU
address
setup
ON
Setting
error
Indoor
unit
Indoor
unit
address
Branch
part
use
setup
4
2
2
2
5
6
0
Branch
A
4
B
2
C
D
E
5
F
6
Outdoor unit display
Indoor unit display
×(Operation)
◑
(Timer)
◑
(Fan)
◑
(Filter) ×(Defrost)
Criteria
• The same indoor unit address was setup more than 3 times in MCU.
Cause of problem
• MCU indoor unit address setting error.