987MB: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
69
A11290C
Troubleshooting Guide (continued)
25
IN
V
A
L
ID
M
ODE
L
SE
LE
CT
IO
N
O
R
S
E
T
U
P
E
R
R
O
R
–I
f
st
a
tu
s
co
d
e2
5o
n
ly
flash
e
s
4
tim
e
s
o
n
p
o
w
er
-u
p
th
e
c
o
n
trol
is
m
issing
its
m
ode
l
p
lu
g
P
L
4
an
d
is
d
e
fa
u
lti
n
g
to
th
e
m
od
e
l
se
le
ct
io
n
sto
re
d
in
me
mo
ry
.
If
sta
tus
cod
e
2
5
fla
s
h
e
s
con
ti
nu
ou
sl
y
it
c
ou
ld
ind
icat
e
an
y
o
f
the
follo
w
in
g
:
-
M
od
el
plug
P
L
4
is
m
issin
g
a
n
d
th
e
re
is
no
v
a
lid
m
o
d
e
l
sto
re
d
in
pe
rm
an
en
t
me
mo
ry
.
T
h
is
w
ill
h
a
p
p
e
n
if
you
fo
rg
et
to
ins
ta
ll
the
m
ode
l
p
lu
g
P
L
4
on
a
servic
e
rep
la
cem
e
nt
c
o
n
trol
.
-
T
he
rm
ost
a
t
c
all
w
it
h
S
W
1
-1
ON.
-
T
he
rm
ost
a
t
c
all
w
it
h
S
W
1
-6
ON.
-
S
W
1
-1
an
d
S
W
1
-6
bo
th
ON
.
-
T
w
o
diff
er
ent
fur
na
ce
m
o
dels
tw
in
ne
d.
-
S
ervic
e
re
pla
cem
e
n
t
c
ont
rol
is
inc
o
rr
ect
.
Need
m
o
d
u
lati
ng
bo
ard
w
ith
soft
w
a
re
versi
o
n
V
17
or
la
te
r.
31
MED
IU
M
P
R
ESS
URE
S
W
IT
CH,
H
IGH
PRESS
URE
S
W
IT
C
H,
OR
PS
R
RELA
Y
DI
D
N
OT
C
L
OS
E
O
R
R
E
O
PE
NE
D
-
Che
ck
fo
r:
-
P
S
R
rela
y
m
a
y
be
de
fe
ctiv
e.
-
S
ee
st
atu
s
co
de
32
.
41
B
L
O
W
E
R
M
O
T
O
R
F
A
U
LT
–
Indic
ates
th
e
b
low
er
fa
iled
to
re
a
c
h
2
5
0
R
P
M
o
r
th
e
blo
w
e
r
fa
ile
d
to
comm
un
ic
at
e
w
ithi
n
the
pres
cri
b
ed
tim
e
lim
its.
T
hirt
y
sec
on
ds
afte
r
b
ein
g
tu
rn
ed
ON
or
ten
sec
on
ds
duri
ng
ste
a
d
y-
st
a
te
op
er
atio
n.
T
u
rn
po
wer
off
a
n
d
ch
eck
the
foll
o
w
in
g
item
s
first
bef
o
re
pr
oc
eed
in
g
to
the
ne
xt
s
tep
.
-
R
ubb
in
g
b
lo
wer
w
h
ee
l.
-
L
o
os
e
b
low
e
r
w
h
ee
l.
-
W
ir
in
g
fr
o
m
fur
na
ce
c
o
nt
rol
to
b
lo
wer
mo
to
r.
Rem
o
ve
th
e
R
th
e
rm
o
sta
t
co
nn
ecti
on
fr
om
the
fur
nac
e
c
o
nt
rol,
disc
on
nec
t
b
o
th
con
n
ect
ors
fr
om
th
e
bl
o
w
e
r
m
ot
or
P
L
13
an
d
P
L1
4.
Doe
s
th
e
b
lo
wer
w
he
e
ltu
rn
fre
e
ly
?
Repla
ce
the
blo
w
er
co
ntr
o
lm
od
ule
a
tt
a
che
d
to
the
b
lo
w
e
r
m
o
tor
.
F
oll
o
w
the
in
str
u
cti
o
ns
w
it
h
the
b
lo
wer
con
tr
ol
m
o
d
u
le
to
m
a
k
e
s
u
re
the
entir
e
blo
w
er
m
o
to
r
d
o
e
s
n
ot
ne
ed
to
b
e
repl
ace
d.
T
u
rn
po
wer
b
ack
o
n.
Is
th
er
e
1
15V
A
C
a
t
P
L
14
-5
an
d
P
L
1
4
-4?
Y
o
uh
a
v
ea
no
p
e
n
w
ir
eo
rb
a
d
term
in
al
o
n
eit
h
e
r
th
e
B
LA
CK
o
r
W
H
IT
E
p
ower
lea
ds
b
et
ween
th
e
fu
rn
a
ce
co
n
tr
o
l
a
nd
th
e
b
low
er
mo
to
r.
If
yo
u
h
a
ve
a
po
w
e
r
c
hok
e
di
sco
nn
ect
it
a
n
d
che
ck
co
ntin
uit
y.
YE
S
YE
S
NO
NO
Is
th
er
e
1
2-V
D
C
at
P
L1
3-1
R
E
D
(+
)
an
d
P
L
13
-4
GR
EE
N
(-)
?
YE
S
NO
Is
th
er
e
1
2-V
D
C
a
t
P
L3
-1
RE
D
(+
)
a
n
d
P
L
3-
2
G
R
E
E
N
(-
)?
Repla
ce
the
fu
rn
ace
con
trol
.
NO
Y
o
uh
a
v
ea
no
p
e
n
w
ir
eo
rb
a
d
term
in
al
o
n
eit
h
e
r
th
e
R
E
D
or
GREE
N
w
ir
e
b
et
wee
n
th
e
fu
rn
a
c
e
con
tr
o
l
a
n
d
the
b
low
er
mo
to
r.
YE
S
Is
th
er
e
5
-V
D
C
a
t
P
L
13
-2
Y
E
L
LO
W
(+
)
and
P
L1
3-
4
G
REE
N
(-
)?
Is
th
er
e
5
-V
DC
a
t
P
L
3-
3
Y
E
LL
O
W
(+
)
a
nd
P
L3
-2
GREE
N
(-)
?
NO
NO
Y
o
uh
a
v
ea
no
p
e
n
w
ir
eo
rb
a
d
term
in
al
o
n
th
e
Y
E
L
LO
W
w
ire
b
e
tw
e
e
n
the
fu
rn
a
c
e
con
tr
o
l
a
n
d
the
b
lo
wer
m
o
tor
.
YE
S
YE
S
T
h
e
vol
tag
e
ju
st
m
e
asu
red
sh
oul
d
b
e
ve
ry
st
a
b
le
a
n
ds
h
o
u
ldn
o
t
fl
u
ct
u
a
tem
o
re
tha
n
.0
2-V
D
C
.
If
th
e
v
olta
ge
fluct
u
a
tes
mo
re
th
an
th
is
ge
t
a
d
iff
er
e
n
t
vo
lt
m
e
ter
be
fo
re
pr
oc
eed
in
g
.
T
urn
po
wer
of
f,
di
sc
on
n
ect
P
L1
3
a
nd
P
L
14
fr
om
the
b
lo
wer
m
oto
r,
the
n
tur
n
po
w
e
r
b
ac
k
o
n
.
C
o
n
n
ec
t
a
D
C
vo
ltm
e
te
r
acro
ss
P
L
13
-3
B
L
UE
(+
)
a
nd
P
L
1
3
-4
GREE
N
(-)
.
T
he
v
o
lt
ag
e
sh
o
u
ld
b
e
n
ea
r
0-V
D
C
b
ut
it
w
ill
fl
uct
u
at
e
b
riefl
y
se
ver
a
l
time
s
a
se
co
n
d
.
If
you
ha
ve
a
n
an
a
log
voltm
e
te
r
the
ne
ed
le
w
ill
b
rie
fl
y
g
o
h
ig
h
seve
ral
tim
e
s
a
sec
on
d.
If
yo
u
h
av
e
a
digital
voltm
e
te
r
w
ith
a
b
a
r
g
ra
p
h
it
w
ill
sh
o
w
al
a
rg
ec
h
a
n
g
e
inm
a
g
n
it
u
d
eo
nt
h
e
bar
g
ra
p
h
s
e
ve
ral
tim
e
s
a
sec
on
d.
If
yo
u
hav
e
a
sta
nd
ard
d
igi
tal
v
o
ltm
e
te
r
it
w
ill
sh
ow
a
b
ri
ef
fluc
tu
a
tio
n
in
vo
lta
ge
an
d
th
e
m
agn
it
ud
e
m
a
y
v
a
ry
de
pe
nd
in
g
o
n
the
voltm
e
te
r
u
se
d.
Does
the
volt
a
g
e
fl
uctu
at
e
a
s
d
e
scri
b
e
d
in
th
e
previ
o
u
s
st
ep
?
Con
n
ect
a
DC
voltm
e
te
r
a
c
ros
s
P
L
3
-4
BLUE
(+
)
a
nd
P
L
3
-2
G
R
E
E
N
(-
).
D
o
es
th
e
vo
ltag
e
fluctu
at
e
a
s
d
e
scri
b
e
d
tw
o
st
e
p
s
ba
ck
?
Y
o
uh
a
v
ea
no
p
e
n
w
ir
eo
rb
a
d
te
rm
in
a
l
o
nt
h
e
B
L
U
E
w
ire
be
tw
ee
n
the
fu
rn
a
ce
con
tr
o
l
a
n
d
the
b
low
er
mo
to
r.
NO
Repla
ce
the
fu
rn
ace
con
trol
.
YE
S
T
u
rn
po
wer
o
ff
,
re
con
ne
ct
P
L
13
an
d
P
L
14
to
the
b
lo
wer
m
oto
r,
the
n
turn
po
w
e
r
b
ac
k
o
n
.
C
o
n
n
ec
t
a
D
C
vo
ltm
e
te
r
acro
ss
P
L
3-
3
Y
E
L
LO
W
(+
)
an
d
P
L
3
-2
GREE
N
(-)
.
D
o
e
s
the
v
o
lt
ag
e
fluc
tua
te
m
o
re
th
a
n
it
did
in
the
pr
evio
us
st
ep
?
NO
YE
S
YE
S
NO
Repla
ce
the
blo
w
er
co
ntr
o
lm
od
ule
a
tt
a
che
d
to
the
b
lo
w
e
r
m
o
tor
.
F
oll
o
w
the
in
str
u
cti
o
ns
w
it
h
the
b
lo
wer
con
tr
ol
m
o
d
u
le
to
m
a
k
e
s
u
re
the
entir
e
blo
w
er
m
o
to
r
d
o
e
s
n
ot
ne
ed
to
b
e
repl
ace
d.
42
IN
D
U
CE
R
M
OT
OR
FA
ULT
–
Ind
ic
a
tes
the
indu
c
e
r
m
oto
r
h
a
s
n
o
t
sta
rte
d
w
it
hin
2
0
seco
nd
s
a
ft
er
a
c
all
fo
r
he
a
t,
the
in
d
u
ce
r
m
o
tor
R
P
M
is
ou
tsid
e
its
valid
ra
n
g
e
o
f
o
p
er
a
ti
o
n
,
or
the
ind
uc
e
r
R
P
M
si
g
na
l
w
a
s
lost
fo
r
5
s
e
co
nd
s
d
u
rin
g
o
pe
rati
on
.
Che
ck
fo
r:
-
P
rop
er
v
en
t
si
zi
n
g.
-F
a
ile
d
in
d
u
ce
r
m
o
to
r.
-
R
estri
cte
d
com
b
u
sti
o
n
a
ir
sup
p
ly
.
-
Im
p
ro
per
m
oto
r
w
iri
ng
.
35
GA
S
V
A
LV
E
FA
U
LT
–
Indi
cat
es
the
m
odu
la
ting
ga
s
val
ve
fa
ile
d
to
re
sp
on
d
to
a
comm
an
d
fr
om
the
fur
nac
e
c
o
nt
rol
or
po
w
e
r
to
the
gas
valv
e
el
ect
roni
cs
w
as
inter
ru
p
te
d.
Ch
eck
for:
-
In
ter
mi
tt
en
t
R
E
D
,
Y
E
L
LO
W
,
o
r
ORA
N
GE
w
ire
at
ga
s
valv
e
o
r
P
L
8
con
n
e
cti
on
s
.
