Three Times
La
ck
o
f
Ig
ni
tio
n.
Fl
as
h
Pa
tt
er
n
B
eg
in
s
in
1
5
M
in
ut
es
A
ft
er
C
on
di
tio
n
O
cc
ur
s.
Th
e
M
od
ul
e
H
as
G
on
e
in
to
S
af
et
y
Lo
ck
ou
t.
Is
LP T
ank
Full 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 2
4
V
olts
Supplied t
o the
Gas Contr
ol
Valv
e?
H
av
e
the Burner
Orif
ice, Burner
Casting and Manif
old
Been Check
ed f
or
Block
age?
Ye
s
Ye
s
Is Pr
oper
Burner Manif
old
Pressure R
ead at
Outlet of Gas
Valv
e?
Does Ignit
er
Glo
w?
Is Flame
Sensor Clean?
Is Ignit
er
Pr
operly
Connect
ed?
Are
240 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
Fo
otno
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
.
Pe
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
to
Ignit
er P
ow
er
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
ovide Pr
oper
Pressure t
o 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
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
No
No
Are 1
0
0
Volts 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
Positioned?
Ye
s
Ye
s
Position 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
21
