Troubleshooting
Samsung Electronics
4-61
4-4-35 MCU branch part setup error – Connect an Indoor unit to a branch part not being used
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Criteria
Cause of problem
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Outdoor unit display
1. How to check
Check the actual use of the branch part. If it is used, turn on the Dip switch for branch part setup. After completing resetting, press
the outdoor unit's K3 button to reset or turn off to restart.
Indoor unit display
MC
U
BO
X
#
1
MCU
PCB
O
FF
MC
U
address
set
u
p
ON
I
ndoor
u
nit
I
ndoor
u
nit
address
Bran
c
h
part
u
se
set
u
p
4
4
2
1
5
6
0
Bran
c
h
A
4
B
C
D
E
5
F
6
2
×(Operation)
◑
(Timer)
◑
(Fan)
◑
(Filter) ×(Defrost)
