L.B. White HW 120 Therma Grow - Manual (Page 20)

20
Problem
L
E
D
F
la
s
h
in
g
O
n
e
T
im
e
F
la
s
h
P
a
tt
e
rn
B
e
g
in
s
Im
m
e
d
ia
te
ly
A
ft
e
r
C
o
n
d
it
io
n
O
c
c
u
rs
.
R
a
p
id
F
la
s
h
R
e
v
e
rse polarity
. Ha
v
e
electrician check neutral and ho
t wire
connections that outlet heat
er is connect
ed t
o
.
L
o
n
g
F
la
s
h
Tw
o seconds
on, tw
o seconds
of
f repe
titiv
ely
for 1
5
minut
es.
Heat
er has att
em
pt
ed tw
o ignition trials. Heat
er is in a 1
5
minut
e w
ait period bef
o
re att
em
pting its
thir
d (f
inal) trial f
or ignition. If ignition is no
t achie
v
e
d af
ter the thir
d
trial, the heat
er will lock out and
the ignition contr
ol module will present the three time flash patt
ern. Either recy
cle the heat
er or w
ait
fo
r heat
er t
o
att
em
pt thir
d ignition trial.
Is
air pr
o
v
ing switch stuck
closed or shor
ted ?
Check
continuity
.
Is
air
flo
w switch arm
binding in f
a
n
housing?
F
ree the switch .
Det
ermine casue of
flapper binding. Check f
o
r damage t
o
fan housing,.
Ye
s
Ye
s
No
No
R
eplace air pr
o
v
ing switch
Def
e
ctiv
e wire or poor
connections t
o
air pr
o
v
ing switch.
R
e
pair wire or connections. Has air pr
o
ving switch
been jum
pered?
Ye
s
No
R
e
mo
v
e
jum
per fr
om switch.