Dunkirk Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler - Manual (Page 61)

61
13 - TROUBLE SHOOTING
Is ha
rne
ss plug
ged
in
to
Return
Te
m
pe
ra
tu
re
S
en
so
r?
Is
h
ar
ne
ss
p
lu
gg
ed
in
to
C
on
tro
l
Module
J5?
_ P _ _ _
Blocking Error E 5 2 Return
Sens
Open
Replac
e Re
tur
n
Tem
pe
ra
tu
re
S
en
so
r
Replace
Control
Module
Check
con
tin
uity of brown
wires between
Return
Te
m
pe
ra
tu
re
S
en
so
r a
nd
Control
Modu
le
J5
-4
an
d
J5
-1
2
Continuity?
Measure Re
tu
rn
Te
mpe
ratur
e
Sen
so
r re
sistance with
d
igita
l
meter.
Es
timat
e Sens
or
te
mpe
rature.
Do tempe
rature
an
d r
es
is
ta
nc
e f
al
l w
ith
in
ran
ges sh
own in ch
art?
Re
place Wires
50
to
90
10
to
32
9K
to
2
4K
ohms
150
to
20
0
90
to
130
°F
°C
R
es
ist
an
ce
130
to
15
0
2K
to
1K
oh
ms
2K
to
3K
oh
ms
3K
to
9K
oh
ms
54
to
66
32
to
54
66
to
94
Return Tempe
rature Sens
or
Re
sistance
Cha
rt
YE
S
NO Inser
t Ha
rnes
s
YE
S
NO
YE
S
NO
Measure Return Temperature
Sensor resistance with digital meter. Estimate
Sensor temperature. Does
temperature fall within ranges
shown on chart?