T
ro
u
b
l
eshootin
g
4-78
S
a
m
s
u
n
g
El
e
c
troni
c
s
4-4-
3
4 MCU b
ra
nch p
art
set
up
error
– S
et
as
b
ei
ng u
sed
w
it
h
o
u
t
c
o
nn
e
c
tio
n
to
a
n In
door
un
it
1
.
H
o
w
to
c
he
ck
A
d
ju
st
the
Dip
s
w
it
c
h
that
sets
u
p
the
u
se
o
f
M
CU
b
ran
c
h
part
to
‘
Not
-U
sed
'
.
A
f
ter
c
o
m
p
l
etin
g
resettin
g
,
press
the
o
u
tdoor
u
nit
'
s
K
3
b
u
tton
to
reset
or
t
u
rn
o
ff
to
restart
.
t1JQFJTOPUJOTUBMMFEUPUIFJOEPPSVOJUXJUIBTTJHOFE
address
on
M
CU
Criteria
Cause of problem
t0DDVSTXIFO.$61*1&JTTFUBTCFJOHVTFEZFUOPUDPOOFDUFEUPBOJOEPPSVOJU
Outdoor unit display
Indoor unit display
MCU
BOX
#
1
MCU
PCB
OFF
ON
1
3
7
9
0
0
1
Branch
A
B
C
D
E
0
F
×(O
peration
)
◑
(T
i
m
er
)
◑
(F
an
)
◑
(F
i
l
ter
)
×(
De
f
rost
)
