International comfort products F9MXT0401410A, Руководство по обслуживанию и технической поддержке

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SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: (F/G)9MXT
Specifications subject to change without notice. 440 04 4321 02 22
Figure 16 Troubleshooting Guide
I
s L
ED
s
tat
us lig
ht
ON s
o
lid
,
alt
ern
atel
y
flashi
ng bri
ght
-dim
-b
rig
ht-
dim
lik
e a
hea
rtb
ea
t
,
o
r fl
ashi
ng
ON a
n
d
O
F
F
?
I
s
th
er
e 2
4
V
at
2
4
V
A
C
a
nd C
O
M?
I
s
th
er
e 1
15V
at
L1
an
d
N
E
U
TR
AL
?
I
s
th
e 2
4
V
f
u
se
o
p
en
?
I
s
do
or
s
w
itc
h clo
sed
?
R
e
p
la
ce t
ra
n
sf
orm
er
.
R
e
p
la
ce do
or
s
w
it
ch
.
I
s
th
er
e 1
15V
goi
ng t
o
s
w
it
ch
?
Close
the
d
oor
s
w
itc
h.
I
s
circ
uit
bre
ak
er cl
ose
d?
Check
fo
r co
nti
nuit
y
i
n
w
ire
from
ci
rcui
t
b
rea
ke
r to
fu
rn
a
c
e
.
Cl
ose
circ
uit b
re
a
k
e
r a
n
d
go
ba
ck
to
ST
A
RT
.
I
s L
ED
s
tat
us lig
ht
alte
rn
atel
y
fla
shin
g
brig
ht
-d
im
-b
rig
ht-
dim
lik
e a h
e
a
rtb
eat
?
D
ete
rm
ine
s
ta
tus c
o
d
e
.
T
h
e
st
atu
s co
d
e
is a
si
ngle
or
t
w
o
di
git
n
u
m
b
e
r
w
it
h
t
h
e
fir
st
num
b
e
r
det
erm
in
ed b
y
t
h
e num
b
e
r of
shor
t fl
ash
es a
nd
th
e se
co
n
d
num
be
r
afte
r t
he
p
lus
(
+
)
sig
n
,
t
he
num
b
e
r of
lo
ng
flash
es?
T
o r
e
c
a
ll a
sta
tus
cod
e:
B
riefl
y
(
2
–
3
seco
nds
)
c
onn
ect th
e
T
EST
/
TW
I
N te
rm
ina
l
to
the “C” the
r
m
o
st
at t
e
rm
in
al
w
it
h
a j
u
m
p
er
wi
re
t
o
b
egi
n st
atu
s co
de
re
cov
er
y
an
d
com
p
o
n
en
t t
e
st.
I
f a
p
revio
us s
tat
us c
o
de is
p
res
en
t
,
t
he c
o
d
e
w
ill
re
p
ea
t 4
tim
es t
h
en
go
on t
o
c
o
m
p
o
nen
t t
e
st.
I
f n
o
p
re
viou
s
cod
e is
p
re
sen
t
,
a
com
p
on
ent
tes
t
w
ill
begi
n w
it
h
o
u
t
fl
ashi
ng an
y
sta
tus cod
es
.
C
o
mpon
en
t T
e
s
t
S
e
qu
enc
e
:
G
a
s
va
lv
e
and
hum
idi
fier
w
ill n
o
t
be t
u
rn
e
d
o
n
.
I
n
d
uce
r m
o
to
r
w
ill
sta
rt in
H
IG
H s
p
ee
d and
rem
ain
on
H
IG
H
u
n
til t
he
en
d of
th
e bl
o
w
er
test
,
th
en
s
h
ift to LO
W
s
p
eed
fo
r 7
to
1
5
seco
nds
,
th
e f
o
llo
w
ing c
o
m
p
on
en
ts
ar
e
on
for 1
0
–
1
5
s
e
co
nds
e
a
ch i
ndivi
du
all
y
:
h
o
t
surf
ace
igni
ter
,
b
low
er
s
p
ee
ds:
LO H
E
A
T,
H
I
H
E
A
T,
COO
L
.
W
as there
a
p
revi
ous stat
us
c
o
d
e
?
G
o t
o
s
e
ctio
n b
e
lo
w fo
r t
he fl
ash
ed
sta
tus
cod
e.
D
oe
s
the
co
ntr
ol r
e
s
p
on
d t
o
W
/
W
1
,
W
2
,
Y
1
,
Y
/
Y
2
,
a
nd
G
(
24V
)
t
h
e
rmo
st
a
t
signal
s?
R
un s
y
stem
t
h
ro
u
gh
a lo
w
-h
eat
,
hi
gh
-
hea
t
,
o
r c
ooli
n
g
c
y
c
le t
o
c
heck
o
p
er
ati
o
n.
S
tatus
co
des
ar
e e
ras
ed
aft
er
72
h
o
ur
s
.
I
s 2
4
V
p
re
s
ent at
W
/
W
1
,
W
2
,
Y
1
,
Y
/
Y
2 or
G
th
erm
os
tat
term
in
als
on
the
fu
rn
ace
cont
rol
?
C
h
e
c
k r
o
o
m
t
h
e
rmo
st
a
t
o
r
inter
co
nne
ctin
g ca
ble
.
D
iscon
nec
t all
the
th
erm
os
tat
wire
s fr
o
m
the fur
nac
e
c
ont
rol.
D
oes the
p
robl
em
r
e
p
e
at
whe
n u
s
ing
a
jum
p
er
w
ire
?
R
e
p
la
ce f
u
rnac
e c
ont
rol.
T
he th
erm
o
s
tat
is n
o
t c
o
m
p
ati
ble
w
ith t
h
e
fur
nac
e co
ntr
ol.
E
ithe
r
in
stall a balla
st
resist
or
,
co
nn
ect t
h
e
C
fu
rn
ace
co
ntr
ol
th
e
rm
o
sta
t te
rm
ina
l
to
th
e
th
erm
o
s
ta
t
,
or
re
p
lace
th
e t
herm
o
stat
.
YE
S
NO
YE
S
YE
S
YE
S
YE
S
YE
S
YE
S
YE
S
ST
A
RT
YE
S
YE
S
NO NO
NO NO
NO
NO
NO
NO
YE
S
NO
NO
Troubles
hoot
i
ng Gu
i
de
R
e
p
la
ce f
u
rnac
e c
o
nt
rol.
YE
S
NO
I
s L
ED
s
ta
tus lig
ht
ON s
o
lid?
NO
YE
S
T
he co
ntr
ol is l
o
ck
ed
out
an
d
w
ill
aut
o
-
rese
t
a
fte
r
1 ho
ur.
L
o
ck
out coul
d be du
e
to
a
n
y
of
the foll
o
w
in
g
:
-
Flam
e s
e
n
s
e ci
rcui
t fail
ur
e.
-
G
a
s
va
lv
e r
e
lay
st
u
c
k o
p
en
.
-
S
oft
w
a
re che
ck
err
or.
R
eset
p
o
wer
to
cle
ar l
o
ck
out.
R
e
p
lac
e
cont
rol if
co
de
re
p
e
ats.
I
ns
p
ect s
e
c
o
nd
ar
y
volt
ag
e
(
24V
)
w
iri
ng
,
includi
ng
th
erm
ost
at l
e
a
d
s f
o
r s
h
o
rt
circuit
.
R
e
p
la
ce f
u
s
e