L.B. White AD250(Spark Ignition) - Manual (Page 22)

Problem LED Flashing One Time Flash patt
ern begins
immediat
ely
, fan mo
to
r
does no
t run. Heat
er
does no
t light.
Is flapper or
air
-pr
oving switch arm
binding on housing? Is there an obstruction in
heat
er outlet? Is air
-
pr
oving switch
shor
ted? (P
er
form
continuity check on air
-
pr
oving switch.)
Ye
s
No
R
epair and/or remo
ve
obstructions.
Ye
s
R
eplace air
-pr
oving switch.
Long Flash Tw
o seconds
on, tw
o
seconds of
f
repe
titiv
ely
for 1
5
minut
es.
Heat
er has att
em
pt
ed tw
o ignition trials. Heat
er is in a 1
5
minut
e w
ait period bef
ore att
em
pting its thir
d
(f
inal) trial f
or ignition. If ignition is no
t achie
ved af
ter the thir
d trial, the heat
er will lock out and the
ignition contr
ol module will present the three time flash patt
ern. Either recy
cle the heat
er or w
ait f
or
heat
er t
o att
em
pt thir
d ignition trial.
21