Navien NP-180, Руководство по обслуживанию

Страница: 82 / 179

©N
avien
Am
eri
c
a
I
n
c
. 20
1
0
NR/NP
series servi
c
e Manua
l
8
0
Versi
o
n 2.0
Check method
Check method Cause Error type
Sens
o
r err
o
r
O
t
h
er tr
o
u
bl
e
D
e
f
e
c
tive
te
mp
erature
sens
o
r
co
nne
c
t
o
r
T
e
mp
erature
sens
o
r
D
e
f
e
c
tive
PCB
Ch
e
c
k i
f
t
h
e
ho
t
w
ater te
mp
erature sens
o
r
co
nne
c
t
o
r
o
r t
h
e
PCB
h
arness ter
m
ina
l
is
w
et
d
ue t
o
an
y
reas
o
n
,
in
cl
u
d
in
g l
eaka
g
e.
U
se a tester t
o m
easure t
h
e te
mp
erature sens
o
r resistan
c
e.
If
t
h
e resistan
c
e is a
b
n
o
r
m
a
l,
re
pl
a
c
e t
h
e te
mp
erature sens
o
r
(
a
b
n
o
r
m
a
l
i
f
it is
low
er t
h
an 0.
5
๐
)
.
Ch
e
c
k t
h
e
o
ut
p
ut te
mp
erature
d
is
pl
a
y
e
d o
n t
h
e
PCB
.
(
H.
5
0.
5
ȥ
5
0.
5
ȕ
)
If
t
h
e tr
o
u
bl
e
co
ntinues
d
es
p
ite t
h
e
ch
e
c
kin
g of
a
bo
ve ite
m
s
,
re
pl
a
c
e t
h
e
PCB
.
<
H
o
t
w
ater te
mp
erature sens
o
r
/
R
e
d l
ine 2
P>
<Ch
e
c
k i
f
t
h
e
ho
t
w
ater te
mp
erature
sens
o
r
l
ine is
op
en
>