L.B. White Guardian with Smart Sense - Hot Surface (60K / 100K) - Manual (Page 22)

22
Problem LED Flashing
One Time Air proving switch contacts are closed before fan motor is started. Flash pattern begins immediately, fan does not run. heater does not light.
Is air
-
pr
o
ving switch
shor
ted? (P
er
form
continuity check on air
-
pr
o
ving switch.)
Ye
s
No
Ye
s
R
eplace air
-pr
o
ving switch
Rapid Flash
R
e
v
e
rse polarity
. Ha
v
e
electrician check neutral and ho
t wire
connections at outlet that heat
er is connect
ed t
o. Ensure wiring t
o
ignition contr
ol is correct. If all is good, replace igntion contr
ol module
Long Flash Two seconds on, two seconds off repetitively for 15 minutes.
Heat
er has att
em
pt
ed tw
o ignition trials. Heat
er is in a 1
5
minut
e w
ait period bef
ore att
em
pting its thir
d
(f
inal) trial f
or ignition. If ignition is no
t achie
v
ed af
ter the thir
d trial, the heat
er will lock out and the
ignition contr
ol module will pr
o
vide the three flash patt
ern. Either shut the heat
er of
f and then turn on,
or w
ait f
or the heat
er t
o
retr
y the thir
d ignition trial.
Is air
-pr
o
ving switch
arm or paddle binding
on housing? Is there
an obstruction in
heat
er outlet?
R
epair and/or remo
v
e
obstructions. check f
o
r
damaged f
an housing. Clean or repair as
needed.