Biasi Inovia 25C ERP, Service Manual

Page: 12 / 52

- 12 -
FAult Finding
Co
mp
on
ents
to
ch
ec
k
Sectio
no
ft
he
man
ual
→
(not
er
ef
.i
nb
rackets)
----
---
---
--
(7
)
2.
912
.9
11
.0
2
18.4
617
1
15.2
4.
112
.2
15
.4
1
10
9.
5
14.3
2.
72
.8
65
--- (4
)
21.1
--- (3
)
--- (2
)
--- (1
)
Appl ianc eloc k- --ou t(*)
Externaltemp .p robe
Pressu regaug e
Safe tyva lve
Expans ion vesse l
Flue temp.p robe NTC
Gas restricto r
Safe tyth ermostat
Detection electro de
Ign ition ele ctrode
Fan /ai rrestricto r
By---p ass val ve
D.h. w.temp .p robe
Main circui ttemp. prob e
D.h. w.fi lter
Main circui tp ressu reswitch
Gas val ve
Cont rolp anelel ectr.p .c.b.
Boiler setting s
Main electronic p.c. b.
Fuse s(El ectronicp. c.b. )
D.h. w.fl owsw itch
Diverter valv e
Pump
D.h. w.heat exchanger
Conden sing heatexchange r
D.h. w.circ uit
C.h. circui t
Cond .d rainpi pean dtra p
Flue pipe s
Gas suppl ylin e
Powe rs upply lin e
De
fe
ct
↓ Th
eb
oiler
do
es
no
ts
tart
either
in
c/
ho
rd
.h.w
.m
od
e.
Th
ec
on
trol
pane
ld
is
pl
ay
OF
F
Fa
ns
till
.
Th
eb
oiler
do
es
no
ts
uppl
yd
.h.w
.
(cold
wate
rf
ro
mt
he
ta
p)
.
Regu
la
ro
pe
ration
in
c/
hm
od
ee
ve
n
du
ring
ad
rawing
of
fd
.h.w
.
dis play
On
c/
hm
od
et
he
temp
eratur
eo
f
th
em
ai
nc
ircu
it
reache
s9
0
Ca
nd
th
ec
/h
sy
st
em
do
es
no
th
eat
.
Th
eb
oile
ro
pe
rates
co
rre
ctly
on
d.h.
w.
mo
de
.
ondi
Inc
orrec
tm
od
ul
at
io
n
tio no
No
is
yb
olie
r
dic ati
Poor
c.
h.
/d
.h.w
.t
em
pe
rature
(9
)
”Er” ind
Po
or
d.h.
w.
temp
erature.
Regu
la
r
op
eratio
ni
nc
/h
mo
de
.
(8
)
No”
Lo
wd
.h.w
.f
lo
wr
at
e
---
Wa
te
rl
eaks
from
th
es
afet
yv
al
ve
duri
ng
op
eratio
no
nc
/h
---
Wa
te
rl
eaks
from
th
es
afet
yv
al
ve
when
th
eb
oi
le
ri
so
ff.
*L
oc
ko
ut
is
in
di
cate
da
s“
E
”o
nt
he
di
sp
la
y.
No
te
Useful
in
format
io
nc
an
be
ob
ta
ined
also
from
th
e
op
tica
li
ndic
at
io
ng
iven
by
th
ea
ppli
an
ce
di
spla
y
(see
sect
io
n4
.1).
1C
he
ck
fo
r2
30V
~b
etween
line
(L
)a
nd
neut
ra
l(
N)
Ve
rify
th
ei
nt
egrity
of
su
pp
ly
ca
bl
e,
pl
ug
an
de
xt
erna
lf
us
es
.
Ch
ec
kt
he
po
la
rity
of
line
and
neut
ra
lc
on
ne
ctio
n
2C
he
ck
th
eg
as
su
pp
ly
pi
pe
an
di
sola
tion
ta
pf
or
ga
st
ig
ht
ne
ss.
3C
he
ck
fo
rs
ou
ndne
ss
and
ab
se
nc
eo
fo
bs
truc
tion
s.
Ve
rify
th
at
th
ef
lu
et
erminal
is
correctly
in
st
al
le
d(
se
ec
le
aran
ces)
an
de
n-
su
re
th
at
exhaus
tg
as
is
no
ts
uc
ke
db
ac
kb
yt
he
bo
iler
.
4C
he
ck
fo
rs
ou
ndne
ss
of
th
ec
ircu
it
an
dv
erif
yi
ts
correct
fillin
g
(see
al
so
in
st
al
la
tion
ma
nua
l).
5A
ja
mmed
by
---p
as
sc
ou
ld
ca
us
et
he
over
---
heat
in
go
ft
he
ma
in
circ
ui
ta
nd
th
ei
nt
erventio
no
ft
he
sa
fe
ty
th
ermostat
.
6U
si
ng
th
ef
lu
ea
na
ly
ze
r,
ch
ec
kt
he
CO
2
val
ue
of
th
ef
lu
e
gas
es
.
Th
is
readin
gi
sa
referenc
ev
al
ue
fo
rt
he
ga
sv
al
ve
settin
g.
7C
he
ck
th
ep
re
ssu
riza
tion
of
th
ee
xpan
sion
ve
ssel
.R
efer
to
th
e
in
st
al
la
tion
ma
nual
fo
rp
rope
rv
al
ue
s.
8d
.h.w
.p
re
ssu
re
to
oh
ig
ho
rf
lo
wr
at
et
oo
hi
gh
.I
fn
eces
sa
ry
in
-
sert
af
lo
wr
at
el
imiter
(14.6)
.
9T
he
bo
iler
do
es
n’
tr
each
th
en
ominal
heat
in
pu
t.
faul
t findin
G