Navien NP-180, Service Manual

Page: 124 / 179

©N
avien
Am
eri
c
a
I
n
c
. 20
1
0
NR/NP
series servi
c
e Manua
l
1
22
Versi
o
n 2.0
5.26. 48Error
Error occurrence conditions and check items
Description Error
48E
Gas pressure
error
Check items
Fo
r an
LP mod
e
l,
i
f
a
low-g
as
p
ressure is
d
ete
c
te
d
at
h
i
gh comb
usti
o
n
(
Sta
g
es 2
-
2
an
d 3),
t
h
e s
y
ste
m d
is
pl
a
y
s
48E (cl
eare
d m
anua
lly)
.
If fi
re
b
reaks
o
ut
5
ti
m
es
o
r
mo
re an
d
i
g
niti
o
n
f
ai
l
s
d
urin
g
t
h
e
comb
usti
o
n a
f
ter t
h
e
low-g
as err
o
r is
d
ete
c
te
d
If
t
h
e tar
g
et
AP
S is
o
ut
of
a s
p
e
c
i
fic
va
l
ue ran
g
e
d
urin
g
t
h
e
comb
usti
o
n
w
it
h
t
h
e
g
as
/
air rate a
dj
uste
d
.
LPG Gas enough?
Yes
No
Check GPS Or supply Iine
Fill the LPG Gas
1
.
Ch
e
c
k t
h
e
g
as su
pply p
ressure.
LP : 8”(9” 18
0 M
od
e
l) ~13
.
5”
W.
C
(
at
dy
na
m
i
c p
ressure
)
2.
Ch
e
c
k i
f
t
h
e
g
as
p
ressure sens
o
r
ho
se is
d
a
m
a
g
e
d
.
3
.
Ch
e
c
k i
f
t
h
e
g
as
p
ressure sens
o
r is
d
e
f
e
c
tive.
4
.
Ch
e
c
k i
f
t
h
e
PCB wo
rks n
o
r
m
a
lly
.