L.B. White 170 Premier - Manual (Page 23)

Def
ectiv
e ignition
contr
ol. R
eplace
contr
ol.
Does
ignition contr
ol
send pr
oper v
oltage t
o
mo
tor fr
om t
erminal
IND on contr
ol?
Is
fan loose on mo
tor shaf
t?
Ye
s
Ye
s
No
No No
R
epair of replace
as needed.
23
Air proving status light is not on.
Does
fan mo
tor
star
t?
Ye
s
No
Ye
s
R
epair or
R
eplace.
Is
F
an Binding?
Tight
en the f
a
n
set scre
ws
Are
wiring and electrical
connections
good?
Ye
s
No
R
eplace
fan mo
to
r.
No
Ye
s
Are 2
4
v
olts
receiv
ed at the
air pr
o
ving switch fr
om
terminal PS1 on contr
oller
when mo
tor
star
ts?
Ye
s
Are wires
and electrical
connections
good?
No
R
epair or
replace wires
or connections.
Def
ectiv
e ignition
contr
ol. R
eplace
contr
ol.
No
Ye
s
V
erify 2
4
v
olts are
receiv
ed at the
indicat
or light.
If so, replace light.
Are 2
4
v
olts
returned fr
om air
pr
o
ving switch t
o
terminal PS2 on
contr
oller?
Ye
s
Are wires and
electrical connections
fr
om air pr
o
ving
switch good?
No
R
epair or replace
wires or connections
as needed.
Check air pr
o
ving
switch f
or continuity
.
R
eplace switch.