Dunkirk Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler - Manual (Page 60)

60
13 - TROUBLE SHOOTING
Is
harness
p
lug
ged
into
Sup
ply
W
at
er
Sensor?
Is
harness
p
lugg
ed
into
C
ontr
ol
Module
J
5?
_
P
_
_
_
Blocking
Error
E
5
1
Supply
Sens
Open
Inse
rt
H
arne
ss
R
epl
ace
Supply
Water
Senso
r
Disco
nnect
J5
fro
m
Co
nt
rol
Mo
dule.
Using
di
gi
tal
m
et
er
me
as
ur
e
check
co
nt
in
uity
of
white
wir
es
b
etwe
en
C
ontrol
an
d
Se
ns
or
.
Contin
uity?
Usi
ng
di
gi
ta
l me
te
r m
ea
su
re
re
sistance
b
etwe
en
S
upply
Water
S
ensor
terminals
J
5-1
1
an
d
J5
-3.
M
easure
resist
ance
of
Sensor
with
digital
m
et
er.
Es
tima
te
S
en
so
r t
em
pe
ra
tu
re
.
Does
it
fall
in
th
e
ra
nge
of
th
e
R
esis
tance
C
ha
rt?
R
eplace
Wires
50
to
9
0
10
to
3
2
9K
to
2
4K
ohms
15
0
to
2
00
90
to
130
°F
°C
R
es
is
ta
nc
e
13
0
to
1
50
2K
to
1K
o
hms
2K
to
3K
o
hms
3K
to
9K
o
hms
54
to
6
6
32
to
5
4
66
to
9
4
Sup
pl
y
Water
Sen
sor
R
esistanc
e
Ch
art
Disc
onn
ect
fi
eld
wiring.
Is
contin
uity
betwee
n
fiel
d
wiri
ng
neutr
al
a
nd
grou
nd
less
tha
n
10
o
hms?
Is
field
grou
nding
con
duct
or
co
nnected
to
Hi
gh
Voltage
Te
rmi
nal
Strip
120
VAC
(G)?
N
O
YE
S
_
P
_
_
_
Blocking
Error
E
4
6
Faulty
groun
d
Con
nect
g
roun
d
condu
ctor
YE
S
N
O
Corre
ct
fa
ulty
gr
ound
condu
ctor
Replac
e
Control
Module
N
O
YE
S
YE
S
N
O
YE
S
N
O
Replac
e
Control
Module
Unplug J5 connector on Control
board. Using digital meter measure resistance between terminals
J5-11
and
J5-3.
Estimate Sensor temperature. Does it fall in the range of the
Resistance Chart?
Disconnect J5 from Control Module. Using digital meter measure check continuity of white wires between Control Board and Sensor. Continuity?