A.O. Smith 28 30 50 60, Installation & Service Manual

Page: 78 / 96

is
Release R
.1.3
UK
78
Wa
rn
in
g
Ma
intena
nce may
o
nly be pe
rformed
b
y a
qu
alifie
d se
rvi
ce and main
te
nance
e
ngin
eer
.
F0
5 (lo
ck ou
t
e
rro
r)
Too many flame errors have
b
een
sig
nall
ed.
Inco
rre
ct roof
or
w
all
terminal. Recircula
ting fl
ue
gases.
1.
C
heck that th
e correct roof or
wa
ll termina
l has b
een
fitted. See
’3
.9
Ai
r sup
ply
and
flue
g
as d
ischarg
e’
.
2.
If
n
ecessary
, in
st
al
l the
co
rre
ct roof or
w
all terminal
.
3.
C
heck that the roo
f or wall
te
rmi
nal
discha
rg
es in
to
a pe
rmi
tted
a
rea.
If the
e
rro
r can
not b
e
resolved
o
r is
pe
rsi
sten
t,
cont
act you
r
in
st
a
lle
r.
F0
6 (lo
ck ou
t
e
rro
r)
Short c
irc
uit
between
io
ni
sa
tio
n
ro
d an
d
earth
Damage
d ca
ble
in
co
nt
act with met
al
su
rf
ac
e.
Ch
eck the
wi
ri
ng
of the
ionisa
tion
rod. If n
ecessary
, rep
lace
the
wi
ring.
If the
e
rro
r pe
rsist
s, co
nt
a
ct
your
inst
all
er
.
To
rep
lace
the
ne
ce
ssary p
a
rt
s, yo
u mu
st
cont
act you
r in
st
al
ler
.
Ceramic p
art
of the
ioni
sa
tion rod is
broken/cracked
.
1.
C
heck whether the ceramic p
art
o
f the ion
isation
rod
is
still
in
ta
ct, in th
e vicinity of
the ai
r di
strib
ution pl
ate
o
f the burn
er
.
2.
If
this is not th
e ca
se,
the io
nisation
ro
d mu
st be repl
aced.
F0
7 (lo
ck ou
t
e
rro
r)
A fl
am
e ha
s be
en
detected
af
ter the
g
as
valve was clos
ed.
Defecti
ve gas valves.
1.
C
heck
w
hether there is
sti
ll burne
r
pre
ssu
re present,
a
fter th
e
g
as
va
lves have close
d.
2.
C
heck whether a flame is stil
l present,
a
fter th
e gas valves
have closed.
3.
If
this is t
h
e case,
then
th
e
g
as
co
ntro
l mu
st be rep
laced
.
If the
e
rro
r can
not b
e
resolved
o
r is
pe
rsi
sten
t,
cont
act you
r
in
st
a
lle
r.
To
rep
lace
the
ne
ce
ssary p
a
rt
s, yo
u mu
st
cont
act you
r in
st
al
ler
.
F0
8 (lo
ck ou
t
e
rro
r)
Error message
from
safety relay
.
F
lam
e de
te
ct
io
n
before gas valve open
ed.
1.
R
eset T
hermoCo
ntrol.
2.
If
the
error ap
pears aga
in, re
pla
ce
T
hermoC
ontrol.
If the
e
rro
r can
not b
e
resolved
o
r is
pe
rsi
sten
t,
cont
act you
r
in
st
a
lle
r.
To
rep
lace
the
ne
ce
ssary p
a
rt
s, yo
u mu
st
cont
act you
r in
st
al
ler
.
Ta
ble
10.2
Displ
ayed errors (Shee
t 6 of
1
0)
Co
de
+
De
scrip
tio
n
Po
ss
ib
le
c
aus
e
S
o
lu
tio
n
R
emar
k