DORCHESTER DR-FC 25, Installation, Commissioning And Maintenance Instructions

Page: 77 / 98

is
Instruction
M
anu
al
DR-
F
C
77
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
.
10
.3
T
rou
blesh
oot
ing
t
a
ble fo
r dis
p
laye
d err
o
rs
Ta
ble
10.2
Displ
ayed errors (Shee
t 1 of
1
0)
Co
de
+
De
scrip
tio
n
Po
ss
ib
le
c
aus
e
S
o
lu
tio
n
R
emar
k
S01 (blo
cking
erro
r)
Op
en circuit fro
m
temperature senso
r T
2
at
b
otto
m
of heater
.
Se
nsor is not
(co
rre
ctly) conn
ecte
d.
Co
nnect th
e
se
nsor lead
to JP3.
Se
e appe
ndi
x
’A.2
Electrical di
agram DR-F
C
’
.
Damage
d wiring
o
r
defective sensor
.
Re
place
the
sen
so
r.
To
rep
lace
the
ne
ce
ssary
pa
rt
s, you mus
t
cont
act your inst
aller
.
S02 (blo
cking
erro
r)
Op
en circuit fro
m
senso
r 1 of
temperature senso
r T
1
at the
top
of
th
e
hea
te
r
(1
)
.
Se
nsor is not
(co
rre
ctly) conn
ecte
d.
Co
nnect th
e
se
nsor lead
to JP5.
Se
e appe
ndi
x
’A.2
Electrical di
agram DR-F
C
’
.
Damage
d wiring
o
r
defective sensor
.
Re
place
sen
sor T
1
.
To
rep
lace
the
ne
ce
ssary p
a
rt
s, yo
u mu
st
cont
act you
r in
st
al
ler
.
S03 (blo
cking
erro
r)
Op
en circuit fro
m
senso
r 2 of
temperature senso
r T
1
at the
top
of
th
e
hea
te
r
(1
)
.
Se
nsor is not
(co
rre
ctly) conn
ecte
d.
Co
nnect th
e
se
nsor lead
to JP5.
Se
e appe
ndi
x
’A.2
Electrical di
agram DR-F
C
’
.
Damage
d wiring
o
r
defective sensor
.
Re
place
sen
sor T
1
.
To
rep
lace
the
ne
ce
ssary p
a
rt
s, yo
u mu
st
cont
act you
r in
st
al
ler
.
S04 (blo
cking
erro
r)
Op
en circuit fro
m
dummy 1.
Dummy is not (co
rre
ctly) conn
ecte
d.
Co
nnect
th
e d
ummy sen
sor l
ead
(2)
to JP4.
Se
e appe
ndi
x
’A.2
Electrical di
agram DR-F
C
’
.
Defecti
ve dummy
.
R
e
place
the du
mmy sensor
.
To
rep
lace
the
ne
ce
ssary p
a
rt
s, yo
u mu
st
cont
act you
r in
st
al
ler
.
S05 (blo
cking
erro
r)
Op
en circuit fro
m
dummy 2.
Dummy is not (co
rre
ctly) conn
ecte
d.
Co
nnect
th
e d
ummy sen
sor l
ead
(3)
to JP4.
Se
e appe
ndi
x
’A.2
Electrical di
agram DR-F
C
’
.
Defecti
ve dummy
.
R
e
place
the du
mmy sensor
.
To
rep
lace
the
ne
ce
ssary p
a
rt
s, yo
u mu
st
cont
act you
r in
st
al
ler
.