Navien NP-180, Руководство по обслуживанию

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©N
avien
Am
eri
c
a
I
n
c
. 20
1
0
NR/NP
series servi
c
e Manua
l
88
Versi
o
n 2.0
5.9. 12Error
Error occurrence conditions and check items.
Description Error
12E
Loss of
flame during
combustion
Check items
Does the water heater have
sufficient gas pressure?
Yes
No
Check the burner assembly, flame rod
and gas valve assembly
Check the gas pressure
Gas Pressure
Natural Gas: 5″ - 10.5″ w.c
LP Gas: 8.0 - 13.0 w.c
1
. Measure
, w
it
h
a
m
eter
,
t
h
e
g
as su
pply p
ressure
( N
G
: 5”(6” 18
0 M
ODEL) ~1
0.
5”
W.
C, LP: 8”(9” 18
0 M
ODEL)~13
.
5”
W.
C)
2.
Ch
e
c
k t
h
e Gas
m
eter
C
a
p
a
c
it
y
.
3
.
Ch
e
c
k t
h
e Gas
P
i
p
e
D
ia
m
eter
(3/4”)
.
4
.
Ch
e
c
k t
h
e
co
ntr
oll
er
DIP
S
/
W
c
a
p
a
c
it
y
settin
g
.
5
.
3-
sta
g
e M
IN d
i
ff
erentia
l g
as
p
ressure a
dj
ust
m
ent err
o
r.
6
.
D
e
f
e
c
tive air
p
ressure sens
o
r.
7
.
Ch
e
c
k i
f
t
h
e n
ozzl
e is
clogg
e
d
.
8
.
D
e
f
e
c
tive
m
u
l
ti
-
sta
g
e va
l
ve.
9
.
D
e
f
e
c
tive
p
r
opo
rti
o
na
l
va
l
ve in t
h
e
m
ain
g
as va
l
ve.
1
0.
Ch
e
c
k i
f
t
h
e
PCB wo
rks
p
r
op
er
ly
.
If
t
h
e s
y
ste
m d
ete
c
ts
lo
ss
of fl
a
m
e
d
urin
g comb
usti
o
n
,
t
h
e s
y
ste
m
st
op
s su
pply
in
g
f
ue
l,
re
p
eats restart
, co
unts t
h
e
lo
ss
of fl
a
m
e in
c
i
d
ents
,
an
d
i
f
t
h
e in
c
i
d
ent
occ
urs 20
ti
m
es in a r
ow, d
is
pl
a
y
s
1
2
E (m
anua
lly cl
eare
d) o
n t
h
e in
doo
r t
h
er
mo
stat.