10
Se
qu
ence
of
O
pe
r
at
i
on
L
ocko
u
t
C
on
d
i
t
i
ons
The
system
wi
ll
go
into
l
ock
out
mode
for
the
fo
ll
owing
reasons
:
1
.
E
RROR
COD
E
110
a
.
Contro
l
board
wi
ll
go
into
“Soft
Lockout
”
if
the
main
burner
cannot
be
l
it
or
fai
l
s
to
prove
f
l
ame
after
3
ignition
tria
l
s
.
The
water
heater
disp
l
ay
indicates
a
l
ockout
condition
by
showing
an
error
code
number
110
with
“Service
N
eeded
”
in
the
contro
l
disp
l
ay
window
.
Refer
to
error
codes
in
the
diagnostic
section
of
this
Service
Manua
l. I
n
a
“Soft
Lockout
”
condition,
the
contro
l
wi
ll
wait
for
15
minutes
and
then
make
3
more
attempts
to
l
ight
the
main
burners
.
Soft
l
ockout
reset
is
accomp
l
ished
by
depressing
the
l
ower
right
button
under
“Reset
”
for
3
seconds
.
2.
E
RROR
COD
E
80
a
. I
f
the
top
of
the
tank
shou
l
d
e
x
ceed
2
07°
F
,
then
the
high
l
imit
contro
l
wi
ll
shut
off
the
burner
and
the
water
heater
wi
ll
go
into
a
“Hard
Lockout
.
”
E
rror
code
80
wi
ll
be
shown
in
the
water
heater
disp
l
ay
.
The
contro
l
can
on
l
y
be
reset
in
the
“Service
Mode,
”
which
is
detai
l
ed
in
the
“Troub
l
eshooting
”
section
of
this
Service
Manua
l.
3
.
E
RROR
COD
E
67
a
. I
f
the
vent
safety
switch
l
ocated
on
the
draft
hood
shou
l
d
open,
the
gas
va
l
ve
wi
ll
c
l
ose,
the
b
l
ower
wi
ll
post
-
purge
and
error
code
67
wi
ll
appear
on
the
disp
l
ay
.
The
l
ockout
condition
wi
ll
reset
once
the
prob
l
em
is
corrected
and
the
switch
reset
.
Refer
to
“Vent
Safety
Switch
Testing
and
Rep
l
acement
”
in
this
Service
Manua
l.
CONNECT
I
ON
/WI
R
I
NG
D
I
AGRAM
10
