L.B. White AW250(building controller) - Manual (Page 25)

25
Four Times
If ignition contr
ol does no
t reset, then replace it. (Int
ernal boar
d f
ault.)
Ha
v
e
q
ualif
ied electrician check po
w
er sour
ce f
or po
w
er q
uality pr
oblems.
(F
req
uency
, line noise, or line spik
es.)
Five Times Rapid On/Off Cycling of the Burner.
See flame sensor relat
ed pr
oblems in
“Three Time” flash patt
ern.
Six Times
The heat
er will continue t
o
operat
e as normal. This flash patt
ern
identif
ies that flame sense current is lo
w and that flame f
ailure
or im
pr
oper operation can occur at an
y time.
(1)
The ignition contr
ol module sends and receiv
es v
oltages thr
oughout the entire operation seq
uence. The module
terminals should also be check
ed f
or deliv
ering pr
oper v
o
ltages, in addition t
o
the individual com
ponents as
indicat
ed b
y the respectiv
e flash patt
ern, t
o
mak
e sure the module is w
o
rking pr
operly
.
(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
.