T
ro
u
b
l
eshootin
g
S
a
m
s
u
n
g
El
e
c
troni
c
s
4-119
4-4-76
O
v
er
v
o
l
ta
g
e
/ L
o
w v
o
l
ta
g
e
error
Ou
tdoor
u
nit
disp
l
a
y
(I
N
VE
R
TE
R
1
P
CB
)
(I
N
VE
R
TE
R
2
P
CB
)
Ju
d
g
m
ent
Method
∙
N
-
phase
w
irin
g
error
and
E
M
I Fu
se
short
.
∙
D
C-L
in
k
Ov
er
v
o
l
ta
g
e
/ L
o
w
v
o
l
ta
g
e
o
cc
u
rs
.
C
a
u
se
o
f
pro
b
l
e
m
∙ C
he
ck
the
inp
u
t
w
irin
g
∙ E
M
I Fu
se
short
Po
w
er
O
ff
Y
es
Y
es
3
80V
is
the
v
o
l
ta
g
e
b
et
w
een
ter
m
ina
l
b
l
o
ck
s
R
, S, T
w
ire
?
Po
w
er
R
, S, T,
N
w
ire
v
o
l
ta
g
e
c
he
ck
and
restart
it
.
R
ep
l
a
c
e
I
n
v
erter
P
CB
and
then
restart
it
.
*
C
he
ck
the
3
-
phase
sensin
g
c
ir
c
u
it
part
.
R
ep
l
a
c
e
Fu
se
,
i
f
the
re
c
ti
f
ier
diode
o
f
the
in
v
erter
P
CB
is
nor
m
a
l
.
No
No
Did
the
E
M
I
P
CB Fu
se
is
short
?
1
.
C
a
u
se
o
f
pro
b
l
e
m
