Troubleshooting
4-76
Samsung Electronics
4-4-33 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.
MC
U
BO
X #
0
M
C
U P
C
B
O
FF
MC
U
address
set
u
p
ON
I
ndoor
u
nit
address
Bran
c
h
part
u
se
set
u
p
4
2
2
0
5
6
0
Bran
c
h
A
B
C
D
E
F
MC
U
BO
X #1
M
C
U P
C
B
O
FF
MC
U
address
set
u
p
ON
I
ndoor
u
nit
address
Bran
c
h
part
u
se
set
u
p
4
0
1
2
5
7
1
Bran
c
h
A
B
C
D
E
F
Outdoor unit display
Indoor unit display
×(Operation)
◑
(Timer)
◑
(Fan)
◑
(Filter) ×(Defrost)
Criteria
• Occurs when an indoor unit address setup switch in MCU has been overlapped.
Cause of problem
• Repeated indoor unit address.
