L.B. White AD100, Owner'S Manual

Page: 23 / 64

Three Times Lac
k of
ignition. The module has gone int
o
saf
ety loc
kout.
I
s
LP tank
full and pr
operly
sized and are all gas
supply v
alv
es t
o
br
ood 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
br
ood heat
er?
Ye
s
Ha
ve
the burner
orif
ice, burner
casting and manif
old
been check
ed f
or
block
age?
Ye
s
Is pr
oper
burner manif
old
pressure read at
outlet of gas
valv
e?
Does ignit
er
spark?
Is flame
sensor clean?
Is ignit
er
pr
operly
connect
ed?
Is Iinit
er
pr
operly gapped?
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
(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
valv
e.
Clean flame sensor with emer
y clo
th or st
eel w
ool.
Connect ignit
er t
o
ignit
er high v
oltage
cable.
Pr
ovide pr
oper
pressure t
o br
ood
heat
er and check
with a gauge.
No
R
emo
ve
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
Is pr
oper
voltage supplied
to
flame
sensor?
Ye
s
Check wiring betw
een module
and com
ponent. R
epair or
replace as necessar
y.
No
Check flame
sensor insulat
or
. If
crack
ed, replace
ignit
er/sensor
assembly
.
Ye
s
23
Ye
s
Four Times
If DSI boar
d does no
t reset, then replace the boar
d. (Int
ernal
boar
d f
ault.)
If DSI boar
d resets, then ha
ve
q
ualif
ied electrician check po
w
er
sour
ce f
or po
w
er q
uality pr
oblems. (F
req
uency
, line noise, line
spik
es, loose connections, t
oo small wire gauge.)
Fiv
e Times
Flame Sense Degradation. Clean sensor
, check all gr
ound
connections.
C
lo
se
g
as
s
upp
ly
va
lv
e t
o
br
oo
d h
eat
er.
Disconnect ignit
or cable fr
om ignition contr
ol.
Place the tip of a scre
wdriv
er about 1/8 in. fr
om
where ignit
er cable w
as connect
ed t
o contr
ol.
Turn br
ood heat
er on.
If spark does no
t jum
p fr
om ignition contr
ol t
o
scre
wdriv
er
, replace ignition contr
ol.
If spark is seen, replace the ignit
er/sensor
assembly
Is t
op of
burner casting
corr
oded?
No
Ye
s
R
emo
ve
corr
osion.
Clean t
op of
casting with emer
y clo
th.
Check gap betw
een ignit
er
electr
ode and burner casting. Gap
should be 1/8 - 3/1
6 In. R
epair or
replace as necessar
y.
Is br
ood heat
er
pr
operly gr
ounded?
Check all gr
ounds
in br
ood heat
er and
in po
w
er supply t
o
heat
er
.
No
Ye
s
Are high limit switch contacts
closed?
No
Pe
rf
orm continuity check
.
If switch is open reset the switch. Check the f
ollo
wing:
-- Conf
irm correct fuel f
or heat
er
.
-- Pr
oper v
oltage t
o mo
tor
-- Dust and dir
t build-up
-- Plugged f
an assembly
-- F
an no
t tight
ened t
o mo
tor
--
Obstructions in air inlets or discharge outlet of br
ood heat
er
.
Are 2
4
v
olts
supplied fr
om
the high limit
switch t
o the gas
contr
ol v
alv
e?
Check f
or v
oltage t
o
valv
e. Check wiring
and repair if def
ectiv
e.
If wiring is good and voltage is no
t present,
replace limit switch.
No
Ye
s