L.B. White Sentinel Radiant Tube AT150 40' Center Mount - Manual (Page 27)

Three Times Ignition failure. The control module is in safety lockout.
Is
pr
oper fuel
supplied t
o
heat
er
inlet?
Connect pr
oper
gas supply t
o
heat
er
. Open all
gas shut
of
f v
alv
es.
Ye
s
No
Is
pr
oper gas
pressure supplied
to
heat
er?
Ye
s
Pr
o
vide pr
oper gas
supply and pressure t
o
heat
er
. R
e
fer t
o
dataplat
e
No
Does
gas contr
ol v
alv
e
open? Check f
or manif
old
pressure at outlet of
contr
ol v
alv
e
Is ignit
or
pr
operly
gapped?
Are
2
4
v
olts supplied
to
gas contr
ol
v
alv
e?
Def
ectiv
e
gas contr
ol
v
alv
e.
R
eplace it.
Ye
s
Ye
s
Check ignit
er gap and
regap, if necessar
y,
t
o
specif
ications.
-- Def
ectiv
e Wires or
Connections, R
epair
or
R
eplace.
-- Def
ectiv
e Ignition
Contr
ol Module.
No
No
No
Does ignit
er
spark?
Ye
s
Is
ignit
er high v
oltage
lead connect
ed?
No
No
Connect high v
oltage lead
Ye
s
A
. Check high v
oltage lead
for continuity and tight connections. R
eplace if
def
ectiv
e.
B. Def
ectiv
e, im
pr
operly
gapped, or dir
ty ignit
er
,
R
eplace, regap, or clean
ignit
er
.
C. Def
ectiv
e Ignition contr
ol.
R
eplace.contr
ol
Five T
imes
If contr
ol module does no
t reset, then replace it.
(Int
ernal boar
d f
ault.)
If module resets, then ha
v
e
q
ualif
ied electrician check po
w
e
r
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.)
Flame sense relat
ed pr
oblems. Check f
or crack
ed or dir
ty flame sensor
,
im
pr
operly positioned sensor
, or poor flame sense gr
ound.
Four T
imes
Lockout from too many flame losses.
26
Does ignition contr
ol
receiv
e 2
4
V
A
C at
terminal W during
ignition seq
uence?
No
P
oor electrical
connections, repair
or replace
Im
pr
operly sized
electrical wiring
fr
om thermsoat t
o
contr
oller
. R
esize
electriclal wiring.
Ye
s