L.B. White AD250 - Manual (Page 25)

F
our Times
If ignition contr
ol module does no
t reset, then replace the contr
ol. (Int
ernal f
ault.)
If ignition contr
ol module resets, then ha
v
e
q
ualif
ied electrician check po
w
er sour
ce
for po
w
er q
uality pr
oblems. (F
req
uency
, line noise, line spik
es, loose connections, t
o
o
small wire gauge.)
Fiv
e Times
Rapid On/Of
f
cy
cling of the
burner
.
Flame Sense Degradation. See flame sensor relat
ed pr
oblems in three time flash patt
ern.
(1)
The ignition contr
ol sends and receiv
es v
oltages thr
oughout the entire operation seq
uence. The ignition contr
ol’s t
erminals
should also be check
ed f
or deliv
ering pr
oper v
oltages, in addition t
o
the individual com
p
onents as indicat
ed b
y
the
respectiv
e flash patt
ern.
(2)
The high-limit switch will open or trip f
or a v
ariety of reasons, such as high gas pressure, lo
w v
oltage, e
xcessiv
e dust and
dir
t
build-up within the heat
er
, dir
ty f
an assembly
, f
an is no
t tight
ened ont
o mo
tor shaf
t, and obstructions in air inlets or
discharge outlet of heat
er
.
25