Navien NP-180, Руководство по обслуживанию

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5.17. 33Error
Error occurrence conditions and check items.
Description Error
33E
Direct water
temperature
sensor
short-circuit
Check items
If
an err
o
r
(op
en
:
2
48
ȕ
o
r
h
i
gh
er
)
in t
h
e
cold w
ater te
mp
erature sens
o
r is
d
ete
c
te
d,
t
h
e s
y
ste
m d
is
pl
a
y
s t
h
e
33E (cl
eare
d
aut
om
ati
c
a
lly)
err
o
r
m
essa
g
e
o
n t
h
e re
mo
te
co
ntr
oll
er an
d
t
h
e
PCB
.
Th
e
bo
i
l
er
m
aintains t
h
e Sa
f
et
y-
S
h
ut
dow
n status.
1
.
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 is
w
et
d
ue t
o
an
y
reas
o
n
,
in
cl
u
d
in
g l
eaka
g
e.
2.
R
e
pl
a
c
e t
h
e
d
e
f
e
c
te
d cold w
ater te
mp
erature sens
o
r.
3
.
R
e
pl
a
c
e t
h
e
PCB
.
©N
avien
Am
eri
c
a
I
n
c
. 20
1
0
NR/NP
series servi
c
e Manua
l
1
0
3
Versi
o
n 2.0
Check method Error
D
e
f
e
c
tive
sens
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
< D
ire
c
t
w
ater te
mp
erature sens
o
r
/ Bl
ue 2
P > < Ch
e
c
k t
h
e
ho
t
w
ater te
mp
erature sens
o
r
>
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.
Measure t
h
e te
mp
erature sens
o
r resistan
c
e.
R
e
pl
a
c
e t
h
e sens
o
r i
f
it is 0
Ω
.
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
.
Cause
Check method