Biasi Riva Plus HE M296.24SR/C, Service Manual, Page: 9 / 40

- 9 -
FAult Finding
C
omp
on
en
ts
to
ch
ec
k
S
ec
tio
n
of
the
m
anual
!
(n
ot
e
ref
.i
n
brac
ket
s)
--- (1)
--- (2)
--- (3)
18
.1
--- (4)
7.2
8.10
9.4
10
.2
12
.2
13
14
.2
15
.2
16
.2
17
.1
--- (7)
--- (8)
---
---
Loc k--- out sig nal lam pre d
De
fe
ct
#
Pow ers upp lyli ne
Gas sup ply line
Flue pipe s
Conde nsat edr ain pip ea ndtr ap
C.h .cir cuit
Pump
Fus es(E lec tro nic p.c .b.)
Ele ctro nic p.c. b.
Boil erse ttings
Gas val ve(o n--- off ope rators )
Gas val ve(m odul atin go perat or)
Main circu itf low switch
Main circu itte mp.p rob e
By--- pas sv alv e
Fan
Air pre ssure senso r
Ign itio nel ectrod e
Det ect ion ele ctro de
Saf ety the rm ost at
Flue prob eN TC
Inje ctor s
Exp ans ion vesse l
Saf ety val ve
Pres sur eg aug e
B
y
pr
essi
ng
th
e
re
se
tp
ush
---
bu
tto
n
th
e
boil
er
tu
rn
s
on
an
d
op
er
ates
cor
-
rec
tly
.
J
J
(6)
J
J
J
B
y
pr
essi
ng
th
e
re
se
tp
ush
---
bu
tto
n
th
e
boil
er
sta
rts
th
e
ig
ni
tion
cy
cl
e.
The
bur
ne
r
doe
sn
’t
lig
ht
on
,t
he
ig
ni-
tio
n
sp
ar
ks
co
nt
inue
and
the
bo
ile
r
lo
ck
s
ag
ain
.
J
J
J
J
J
ON
B
y
pr
essi
ng
th
e
re
se
tp
ush
---
bu
tto
n
th
e
boil
er
sta
rts
th
e
ig
ni
tion
cy
cl
e.
The
bur
ne
r
ligh
ts
on
,t
he
ig
nit
io
n
sp
ar
ks
co
nt
inue
and
the
bo
ile
rl
oc
ks
ag
ai
n.
J
J
J
J
J
J
Th
e
boil
er
does
not
st
ar
te
ith
er
in
c/
h
mod
e.
A
ll
th
e
op
er
ation
lig
hts
O
FF
Fa
n
st
ill.
J
J
J
The
bur
ne
rd
oe
sn’
tl
ight
ei
the
ri
n
c.
h.
mod
e.
Fa
n
tur
ns
.
J
J
J
J
J
The
bur
ne
rd
oe
sn’
tl
ight
ei
the
ri
n
c.
h.
mod
e.
Fa
n
do
es
n’
t
tur
n.
J
J
J
J
J
J
J
OFF
Th
e
boil
er
lig
ht
s
for
a
sh
or
twh
ile
on
c.h
..
J
J
4 fault findinG