L.B. White AD100 - Manual (Page 24)

Three Times Lac
k of
ignition. The module has gone int
o
saf
e
ty loc
k
out.
Is
LP tank
full and pr
operly
sized and are all gas
supply v
alv
es t
o
heat
er open?
Fill tank or resize if
necessar
y.
Open all
gas supply v
alv
es
Ye
s
No
Is pr
oper gas
pressure supplied
to
heat
er?
Ye
s
Are 2
4
v
olts
supplied t
o
the
gas contr
ol
v
alv
e?
Ha
v
e
the burner
orif
ice, burner
casting and manif
old
been check
ed f
o
r
block
age?
Ye
s
Is pr
oper
burner manif
old
pressure read at
outlet of gas
v
alv
e?
Does ignit
er
spark?
Is flame
sensor clean?
Is ignit
er
pr
operly
connect
ed?
Is Ignit
er
pr
operly gapped?
Ye
s
Ye
s
Are high limit
switch contacts
closed?
Ye
s
Ye
s
Ye
s
If contacts are “Open”,
reset the switch.
Det
ermine cause of high limit tripping. See
F
o
o
tno
te
4 at end of
Tr
oubleshoo
ting section.
(A)
If lo
w or high pressure
is read, adjust outlet pressure as necessar
y.
(B)
If gas pressure is no
t
read, replace the gas contr
ol v
alv
e.
Check continuity thr
ough
ignit
or cable Continutiy should
be fr
om 1
6-1
8 k Ohm. If ignit
er
cable is good, repalce the ignition contr
ol .
Clean flame sensor with emer
y clo
th or
st
eel w
ool.
Connect ignit
er
to
ignit
er high
v
oltage cable.
Check gap betw
een ignit
er electr
ode and
burner casting. Gap should be 3/1
6 In.
R
epair or replace as necessar
y or replace
contr
ol module.
Pr
o
vide pr
oper
pressure t
o
heat
er
and check with a
gauge.
Check wiring betw
een
module and
com
ponent. R
epair
or replace as
necessar
y,
or replace
ignition contr
ol
module.
No
R
emo
v
e
orif
ice and
burner casting. Blo
w
out with com
pressed
air or clean with a
sof
t brush.
No
No
No
No
No
No
No
No
Is pr
oper
v
oltage supplied
to
flame
sensor?
Ye
s
Check wiring betw
een
module and com
ponent.
R
epair or replace as
necessar
y.
No
Is flame
sensor
insulat
or
crack
ed? No
R
eplace ignition
contr
ol
Ye
s
Ye
s
R
eplace
ignit
or
assembly
Is heat
er
pr
operly
gr
ounded?
Contact electrician.
Syst
em must be
gr
ounded f
o
r
pr
oper operation.
No
23
Ye
s
Ye
s