T
ro
u
b
l
eshooting
4-68
S
ams
u
ng
El
ectronics
4-4-
2
4 C
o
mmun
i
c
atio
n
error
b
et
w
ee
n m
ai
n
a
n
d
s
ub Un
it
o
f
o
u
tdoor
un
it
or
b
et
w
ee
n
o
u
tdoor
un
its
-
∙ C
omm
u
nication
error
between
o
u
tdoor
u
nits.
∙
Refer
to
the
ju
dgment
method
be
l
ow.
I
ndoor
u
nit
disp
l
a
y
Ju
dgment
Method
C
a
u
se
of
prob
l
em
Ou
tdoor
u
nit
disp
l
a
y
Reset
error
(K
e
y
3)
C
heck
the
o
u
tdoor
u
nit
with
error.
(U
2
00, U
2
01, U
2
0
2
, U
2
0
3)
I
s
the
power
s
u
pp
ly
norma
l?
1
5
V,
5
V
C
heck
wiring
of
o
u
tdoor
u
nit
comm
u
nication
cab
l
e.
C
heck
K1
3
and
K14
set
u
p
options
for
o
u
tdoor
u
nit.
Rep
l
ace
P
CB
.
C
heck
the
power
C
hange
wiring
or
connect
C
hange
settings
Y
es
Y
es
Y
es
No
No
No
1
.
C
a
u
se
of
prob
l
em
E
ssentia
l
Re
qu
irements
before
C
hanging
P
CB
in
C
ase
of
C
omm
u
nication
E
rror
:
Refer
to
p.5
9
