L.B. White 170 Tradesman Portable Forced Air - Manual (Page 21)

Three Times I
ndicates ignition
failure.The ignition control is in safety lockout..
Is pr
oper fuel
supplied t
o
heat
er
inlet?
Connect pr
oper
gas supply t
o
heat
er
. Open all
gas shut
of
f v
alv
es.
Is pr
oper gas
pressure supplied
to
heat
er?
Pr
o
vide pr
oper gas supply
pressure t
o
heat
er
. R
e
fer t
o
dataplat
e. If LP gas is used,
ensure LP container is full.
Is backflash
switch tripped?
Check
continuity
.
Is Ignit
or
pr
operly
gapped?
Is pr
oper
v
oltage
supplied t
o
gas v
alv
e?
Def
ectiv
e gas
v
alv
e.
Check ignit
er gap
R
egap t
o
3/1
6 in.
Def
ectiv
e wires or
connections. If good,
replace ignition contr
ol.
Does ignit
or
spark?
Is ignit
er high v
oltage
lead securely
connect
ed?
R
eposition
Ignit
er
.
(See Ser
vice
Instructions)
Connect high v
oltage lead
21
Five Times
If contr
ol module does no
t reset, then replace it (Int
ernal boar
d
fault.) If module resets, then ha
v
e
q
ualif
ied electrician check po
w
e
r
sour
ce f
or po
w
er q
uality pr
oblems. (F
req
uency
, line noise, line
spik
es, loose connections, t
oo small wire gauge.)
Flame sense relat
ed pr
oblems. Check f
o
r
crack
ed or dir
ty flame sensor
, im
pr
operly
positioned sensor
, or poor flame sense gr
ound.
Four Times Rapid On/Off cycling of the burner.
Does gas
solenoid v
a
lv
e open?
TRADESMAN U
L
TRA HEATER
Problem
Is the heat
er
pr
operly
gr
ounded?
No
Ensure all
gr
ounds are
connect
ed.
Det
ermine if ignit
or receiv
es high v
oltage:
-- Disconnect ignition lead fr
om ignition contr
ol.
-- P
osition a scre
wdriv
er tip about 3/1
6 inch a
w
a
y
fr
om ignition contr
ol where lead w
as connect
ed .
-- WITH GAS OFF
, star
t the heat
er
.
-- If no spark is seen, replace the igntion contr
ol.
-- If spark is seen, reconnect igntion lead t
o
contr
ol.
-- Disconnect the lead at the ignit
or
.
-- Hold the lead about 3/1
6 in. fr
om a gr
ounded
section of the heat
er
.
-- WITH GAS OFF
, star
t the heat
er
.
-- If no spark is obser
v
ed, replace the ignition lead.
-- If spark is obser
v
ed, replace the ignit
or
.
Is ignit
or gap
positioned
to
w
a
rd
burner
orif
ice?
No
No
No
No
No
No
No
No
No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Check continuity acr
oss
switch. If contacts are open det
ermine cause.
Check f
or:
pr
oper v
oltage, block
ages
at air inlets or outlet, loose
fan, or lo
w f
an speed.
If good, repalce backflash
switch.
Ye
s
Check the burner orif
ice
for block
age. Clean or
replace the orif
ice .