T
ro
ubl
eshooting
S
ams
u
ng
El
ectronics
4-
37
4-3-22 Pipe Blocking Error (Error Code: E422)
1
.
T
est
I
tem
1
)
Chec
k
the
open
state
of
the
o
u
tdoor
u
nit
ser
v
ice
v
a
lv
e.
2
)
Chec
k
the
connection
of
the
pipe.
3)
Chec
k
the
operation
of
the
EEV
.
4
)
Chec
k
the
refrigerant
l
ea
k
age.
5)
Chec
k
the
connection
of
the
indoor
u
nit
PBA
EV
A
sensor.
6
)
Chec
k
the
fa
ul
t
in
the
indoor
u
nit
EV
A
sensor.
2
.
Chec
k
proced
u
re
Y
es
Y
es
Y
es
I
f
there
occ
u
rs
E422
error
,
reset
the
power
and
chec
k
in
the
fo
ll
owing
order.
Chec
k
whether
the
pipe
is
empty
and
open
a
ll
the
ser
v
ice
v
a
lv
es
on
the
gas
and
l
i
qu
id
pipes.
Change
and
connect
the
pipes
immediate
l
y
and
empty
the
pipes
and
then
open
the
ser
v
ice
v
a
lv
es.
Chec
k
the
rep
l
acement
of
the
EEV (b
ody
/
coi
l
)
and
the
refrigerant
l
ea
k
ing
part.
After
that
,
recharge.
Chec
k
the
temperat
u
re
v
a
lu
e
thro
u
gh
S-
N
ET,
etc.
and
then
if
there
is
a
fa
ul
t
,
rep
l
ace
and
reconnect.
No
No
No
No
Chec
k
the
opening
of
the
o
u
tdoor
u
nit
ser
v
ice
v
a
lv
e.
Chec
k
the
connection
of
the
pipes
(
s
u
ch
as
disconnection
, b
ent
,
or
cross
-
connection
with
other
sets).
Chec
k
the
EEV
operation
and
the
refrigerant
l
ea
k
age.
Chec
k
the
fa
ul
t
in
the
indoor
u
nit
EV
A
sensor
and
the
connection
state.
