L.B. White AD250(Spark Ignition) - Manual (Page 21)

Problem LED cons
tant on
LED light no
t on
during a call f
or
heat.
N
ormal operation.
Is heat
er
plugged in?
Plug heat
er in.
Ye
s
No
Ye
s
Ye
s
Ye
s
Is
thermostat
set abo
ve
room
te
m
perature?
Set thermostat
abo
ve
room
te
m
perature.
Is
thermostat
def
ectiv
e? Check
for continuity
.
Is
pr
oper
voltage supplied
to
heat
er po
w
er cor
d
and thr
ough po
w
er
cor
d?
Check dataplat
e f
or
electrical supply
req
uirements. Pr
ovide
pr
oper v
oltage fr
om
electrical supply
. Check
cir
cuit break
er
s in
building electrical
syst
em. Check po
w
er
cor
d f
or continuity
.
R
eplace thermostat
Are 2
4
v
olts
supplied fr
om
transf
ormer?
R
eplace
transf
ormer
No
No
No
No
No
Ye
s
Are
24
v
olts
supplied t
o
ignition module?
Poor electrical connection or br
ok
en
wire present. R
epair or replace.
Ye
s
LED light in module is def
ectiv
e.
R
eplace ignition module.
Is
pr
oper
voltage supplied to
transf
ormer?
Check electrical connections and po
w
er supply t
o
transf
ormer
.
R
epair as necessar
y.
No
Ye
s
PR
OBLEMS
20