L.B. White AW250, Owner'S Manual And Instructions

Page: 23 / 30

Three Times
L
a
ck
o
f
Ignition
.
Fl
a
sh
P
atte
rn
B
egin
s
in
15
Min
u
te
s
Af
te
r
C
ondition
Occurs. Th
e Mod
ul
e
Ha
s
G
one into
S
a
fet
y
L
o
ck
o
u
t.
Is
LP T
ank
F
ull and Pr
operly
Sized and are all Gas
Supply V
alv
es t
o
Heat
er Open?
Fill T
ank or R
esize 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
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
Ye
s
Is Pr
oper
Burner Manif
old
Pressure R
ead at
Outlet of Gas
V
alv
e?
Does Ignit
er
Glo
w?
Is
Flame Sensor
Clean?
Is Ignit
er
Pr
operly
Connect
ed?
Are
2
40 V
olts
Supplied fr
om
Ignition Contr
ol
Module t
o
Ignit
er?
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 T
rippage. See
F
o
o
tno
te
5 on page 23.
(A)
If lo
w pressure is read,
adjust outlet pressure as necessar
y.
(B)
If gas pressure is no
t
read, replace the contr
ol
v
alv
e.
Def
ectiv
e Ignit
er
.
P
e
rf
orm Continuity
Check and R
eplace
Ignit
er If Necessar
y.
Clean Flame Sensor
with Emer
y Clo
th or
St
eel W
ool.
Connect Ignit
er t
o
Ignit
er P
o
w
e
r
Supply Wiring.
Check Wiring Betw
een Module and
Com
ponent. R
epair or R
eplace as
Necessar
y or R
eplace Contr
ol Module.
Pr
o
vide Pr
oper Pressure
to
Heat
er and Check with
a Gauge.
(A)
Check f
or Def
ectiv
e
Wires or Connections. R
epair or R
eplace.
(B)
R
eplace 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
Are 1
0
0
V
olts Supplied t
o
Flame
Sensor?
Ye
s
Check Wiring Betw
een
Module and Com
ponent.
R
epair or R
eplace as
Necessar
y.
No
Is
Flame Sensor
Insulat
or
Crack
ed?
Ye
s
R
eplace Sensor
.
No
Is
Flame Sensor
Pr
operly
P
ositioned?
Ye
s
Ye
s
P
osition Flame Sensor
so 12.7 mm. - 1
9
mm.
of Tip is in Burner
Flame.
No
Is Heat
er Pr
operly
Gr
ounded?
Contact Electrician.
Syst
em must be
Gr
ounded f
or Pr
oper
Operation.
No
22