White Outdoor FUEL HD120 - Manual (Page 24)

23
Th
re
e T
Ti
m
es
(F
la
sh
PP
at
te
rn
B
eg
in
s i
in
44
0
S
ec
on
ds
AA
ft
er
C
on
di
tio
n
O
cc
ur
s.
) T
Th
e
M
od
ul
e H
H
as
G
on
e i
in
to
SS
af
et
y
Lo
ck
ou
t.
Is Proper Fuel
Supplied to Heater Inlet? Connect Pr
oper F
uel
Supply t
o Heat
er
.
Open All Gas Shut
of
f
Valv
es.
Ye
s
No
Is Pr
oper Gas
Pressure Supplied t
o
Heat
er?
Ye
s
Ye
s
Pr
ovide Pr
oper Gas Supply
Pressure t
o Heat
er
.
R
ef
er t
o Dataplat
e
No
No
Is High Limit
SwitchT
ripped?
Check Continuity
If High Limit Switch is T
ripped,
R
eset the Switch and Det
ermine
Cause of High Limit T
ripping.
Check f
or Loose F
an, Lo
w
Voltage, High Gas Pressure, and
Air R
estrictions.
Fo
ur
TT
im
es
Def
ectiv
e DSI Boar
d R
eplace DSI Boar
d
Does T
w
o Stage
Gas Contr
ol V
alv
e Open?
(T
urn Unit On. Should Hear A
udible
Click When V
alv
e Opens, Appr
ox. 4-5
Seconds Af
ter P
ow
er is
Supplied T
o Unit.
Is Ignit
or
Pr
operly
Gapped?
Are
24
V
olts Supplied
to
T
erminal “MV”
on Gas V
alv
e?
Def
ectiv
e Gas V
alv
e.
R
eplace Gas V
alv
e.
Ye
s
Ye
s
Ye
s
Check Ignit
er Gap
and R
egap, if
Necessar
y,
to
Specif
ications.
-- Def
ectiv
e Wires or