Grant Combi 90 V3, Инструкция для пользователя, установки и обслуживания

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13 - FAULT FINDING
1
3
.5
\
C
o
n
d
en
si
n
g
C
o
m
b
i
o
n
ly
-
C
en
tr
a
l
h
ea
ti
n
g
O
K
-
p
o
o
r
o
r
n
o
d
o
m
es
ti
c
h
o
t
w
a
te
r
F
A
U
L
T
P
O
S
S
IB
L
E
C
A
U
S
E
A
C
T
IO
N
N
o
w
a
te
r
fl
o
w
in
g
fr
o
m
h
o
t
ta
p
M
ain
sw
ate
rs
up
pl
y
is
no
tc
on
ne
cte
d
to
co
ld
wa
ter
in
let
of
bo
ile
r.
Ch
ec
k
an
d
re
cti
fy
as
ne
ce
ss
ar
y.
On
eo
rm
or
ei
so
lat
in
g
va
lv
es
,s
to
p
co
ck
s,
etc
.i
n
th
ep
ip
ew
or
k
ar
ec
lo
se
d.
Op
en
all
va
lv
es
in
pi
pe
wo
rk
to
an
d
fro
m
bo
ile
r.
Th
ec
ol
d
wa
ter
iso
lat
in
g
va
lv
ei
n
th
eb
oi
ler
is
clo
se
d,
Op
en
va
lv
ef
ul
ly
(lo
ca
ted
in
th
et
op
rig
ht
of
bo
ile
r).
Th
er
ei
sa
bl
oc
ka
ge
(o
rb
lo
ck
ag
es
)i
n
th
ep
ip
ew
or
k.
Ch
ec
k
an
d
re
cti
fy
as
ne
ce
ss
ar
y.
N
o
h
o
t
w
a
te
r
o
p
e
r
a
ti
o
n
Ho
tw
ate
rc
ha
nn
el
of
pr
og
ra
m
m
er
is
se
tt
o
OF
F.
Ch
ec
k
pr
og
ra
m
m
er
is
se
tt
o
ON
fo
rh
ot
wa
ter
.
In
su
ffi
cie
nt
flo
w
of
wa
ter
th
ro
ug
h
bo
ile
r.
Ch
ec
k
flo
w
is
at
lea
st
3
lit
re
s/m
in
-r
ec
tif
y
as
ne
ce
ss
ar
y.
Ho
tt
ap
is
no
tc
on
ne
cte
d
to
ho
tw
ate
ro
ut
let
of
bo
ile
r.
Ch
ec
k
an
d
re
cti
fy
as
ne
ce
ss
ar
y.
Bo
ile
rc
ol
d
wa
ter
an
d
ho
tw
ate
rc
on
ne
cti
on
sr
ev
er
se
d.
Ch
ec
k
an
d
re
cti
fy
as
ne
ce
ss
ar
y.
Fl
ow
sw
itc
h
is
no
to
pe
ra
tin
g.
Ch
ec
k
flo
w
sw
itc
h
is
co
rre
ctl
y
fit
ted
-i
n
lin
ew
ith
flo
w.
Ch
ec
k
co
nt
in
ui
ty
ac
ro
ss
flo
w
sw
itc
h
be
tw
ee
n
ter
m
in
als
10
an
d
11
.
Pr
im
ar
y
sto
re
is
no
tu
p
to
tem
pe
ra
tu
re
.
Se
tH
W
ch
an
ne
lo
n
pr
og
ra
m
m
er
to
ON
-b
ur
ne
ra
nd
ho
tw
ate
rp
um
p
sh
ou
ld
sta
rt.
Pr
im
ar
y
sto
re
(h
ot
wa
ter
)p
um
p
is
no
to
pe
ra
tin
g.
Ch
ec
k
fo
r2
30
V
su
pp
ly
to
pu
m
p
wi
th
wa
ter
on
.
Fa
ul
ty
Ho
tW
ate
rP
CB
se
ns
or
.
Re
pl
ac
es
en
so
ra
nd
ch
ec
k
op
er
ati
on
.
Fa
ul
ty
Ho
tW
ate
rP
CB
.
Ch
ec
k
fo
r2
30
V
ou
tp
ut
fro
m
'B
'B
ur
ne
r'
ter
m
in
al
on
PC
B.
If
no
ou
tp
ut
-r
ep
lac
eH
ot
W
ate
rP
CB
an
d
ch
ec
k
op
er
ati
on
.
Re
lay
No
.1
fa
ul
ty
-n
ot
sw
itc
hi
ng
.
Ch
ec
k
fo
r2
30
V
to
'F
lo
w
sw
itc
h'
ter
m
in
al
of
He
ati
ng
PC
B.
L
o
w
w
a
te
r
te
m
p
e
r
a
tu
re
a
t
ta
p
Fl
ow
of
wa
ter
th
ro
ug
h
bo
ile
rt
oo
hi
gh
.
Re
du
ce
flo
w
an
d
ch
ec
k
wa
ter
tem
pe
ra
tu
re
.
Th
er
m
os
tat
ic
m
ix
in
g
va
lv
ei
nc
or
re
ctl
y
se
t.
Se
tm
ix
in
g
va
lv
et
o
se
tti
ng
'4.
5'.
Pr
im
ar
y
sto
re
(h
ot
wa
ter
)p
um
p
sp
ee
d
to
o
lo
w.
Ch
ec
k
pu
m
p
sp
ee
d
is
se
tt
o
m
ax
im
um
-s
ett
in
g
3.
Fa
ul
ty
Ho
tW
ate
rP
CB
se
ns
or
.
Re
pl
ac
es
en
so
ra
nd
ch
ec
k
op
er
ati
on
.
Fa
ul
ty
Ho
tW
ate
rP
CB
.
Ch
ec
k
fo
r2
30
V
ou
tp
ut
fro
m
'B
ur
ne
r'
ter
m
in
al
on
PC
B.
If
no
ou
tp
ut
-r
ep
lac
eH
ot
W
ate
rP
CB
an
d
ch
ec
k
op
er
ati
on
.
H
o
t
w
a
te
r
fo
r
sh
o
r
t
p
e
r
io
d
o
n
ly
Bu
rn
er
no
tf
iri
ng
fo
rh
ot
wa
ter
(a
fte
ra
sh
or
tt
im
e)
.
Ch
ec
k
op
er
ati
on
of
bo
ile
ro
n
he
ati
ng
-s
et
sw
itc
h
to
'C
on
sta
nt
'.
No
te:
Bu
rn
er
wi
ll
no
tn
ec
es
sa
ril
y
fir
ea
ss
oo
n
as
tap
is
op
en
ed
.
If
bu
rn
er
fa
ul
ty,
re
fe
rt
o
bu
rn
er
fa
ul
tf
in
di
ng
ch
ar
t.
Bu
rn
er
oi
lp
re
ss
ur
es
et
to
o
lo
w
on
oi
lp
um
p.
Ch
ec
k
an
d
se
to
il
pr
es
su
re
to
co
rre
ct
va
lu
e(
se
eS
ec
tio
n
4.
3,
4.
4,
4.
6)
.
In
co
rre
ct
no
zz
le
fit
ted
to
bu
rn
er.
Ch
ec
k
an
d
fit
co
rre
ct
no
zz
le
(se
eS
ec
tio
n
4.
3,
4.
4,
4.
6)
.
Outdoor Combi 90 V3, Combi Max and Condensing Combi 51
13 - FAULT FINDING