L.B. White 300 Director - Manual (Page 21)

Motor runs, Igniter does not spark.
R
eplace
ignit
or
.
No
Check f
or pr
oper v
oltage
fr
om contr
ol module t
o
ignition transf
ormer
. Check
all wiring connections. If
contr
ol boar
d is no
t
sending v
oltage t
o ignition
transf
ormer
, replace
ignition contr
ol module.
Has
ignit
or assembly
been cleaned?
No
Ye
s
Is ignition
transf
ormer
receiving pr
oper
v
oltage fr
om contr
ol
module?
Ye
s
Ye
s
Is heat
er
recie
ving pr
oper
v
oltage ?
Det
ermine electrical
req
uirements of heat
er
.
Ensure it matches po
w
er
supply
. Check wiring of po
w
er
supply t
o heat
er
.
No
Is
ignition
transf
ormer
sending out high
v
oltage?
Check bo
th ignition ltransf
ormer leads
for continuity
. If leads are
good,det
ermine if ignition transf
ormer
is sending high v
oltage.:
-- Disconnect solenoid v
alv
e wiring.
-- R
emo
v
e ignition leads fr
om ignit
or
--Hold a scre
wdriv
er tip about 1/8 in.
fr
om ends of bo
th leads.
-- T
urn heat
er on.
-- Spark should be seen fr
om bo
th
leads. If none, replace ignition transf
ormer
.
No
Ensure leads are
connect
ed at ignition
transf
ormer and
ignf
it
or
.
No
Are ignition
transf
ormer leads
securely connect
ed?
Is
ignit
or insulat
or
crack
ed?
Ye
s
No
Clean the ignit
or
electr
odes. Use emer
y
clo
th.
Ye
s
Ye
s
Problem
Check the ignit
or
gap. R
ef
er t
o
ignit
or gapping
instructions in this
manual.
Motor runs, igniter sparks, heater does not light, or lights and goes out
Ensure f
ittings are
positioned accor
ding t
o
illustrations in manual.
No
Are air tube
fittings pr
operly
positioned?
Check tubes and
fittings. If necessar
y
remo
v
e and blo
w out
with air
.
No
Are air pressure tubes
and f
ittings clean?
V
erify tubes are secure and pr
operly
connect
ed. No
Are air pressure
switch tubes securely
connect
ed t
o pr
oper
por
ts at air pressure
switch?
Ye
s
If fuel ignit
es but
burner goes out, check pho
tocell.
R
eplace if
def
ectiv
e.
20
Ye
s
Ye
s
Check f
or contiuity or
jum
per the switch. if
switch is open or heat
er
ignit
es af
ter b
ypassing
the switch,replace switch
No
Is high limit heat
switch closed ?
Motor shuts off immediately after call for heat is satisfied
Ensure good electrical
connections. If good,
replace v
alv
e.
No
Does solenoid
v
alv
e open?
Ye
s
Ye
s
Check f
or pr
oper pressure.
Ensure mo
tor is operating
pr
operly
. Check condition of
coupling betw
een pum
p and
mo
tor
. If mo
tor and coupling
are good, and pum
p pressure
canno
t be set, replace pum
p.
No
Has pum
p
pressure been
check
ed?
R
econnect heat
er t
o
its po
w
er supply and
reset the heat
er
No
Is heat
er
connect
ed t
o its
po
w
er supply?
Ye
s
Check tubes and
fittings. If necessar
y
remo
v
e and blo
w out
with air
.
Def
ectiv
e
ignition contr
ol.
R
eplace contr
ol.
Ye
s Star
t the heat
er
. Check
continuity acr
oss switch
terminals. If contacts are open,
jum
per the switch. If heat
er
ignit
es, the switch is def
ectiv
e.
No
Are air pressure switch contacts
closed?
Ye
s
Securely attach the
case at f
an end t
o
heat
er
.
No
Is upper case at f
an
end securely f
ast
ened
to heat
er?
Ye
s