23
TROUBLESHOOTING
b4
E
_b
4
B
Low
er
M
ot
or T
rip
or
Lo
st
Ro
to
r
(M
OT
OR
T
R
IP
S
)
Bl
ow
er
M
oto
r -
C
urre
nt
T
rip
(o
r) Los
t
R
ot
or
•
F
an/
m
ot
or
obs
tr
uc
tio
n o
r a
bno
rm
al
m
ot
or
loadi
ng
•
P
ow
er
in
te
rr
upt
ion (l
ow
v
ol
tag
e)
•
H
igh l
oad
ing c
on
di
tio
ns
,
bl
oc
ke
d
fil
ters
•
B
loc
kage
in
t
he
ai
rfl
ow
(
duc
tw
or
k)
or
du
ct
w
or
k u
nde
rs
iz
ed
b6
E
_b
6
V
ol
tage
or
T
em
pera
tur
e T
rip
(M
OT
OR
V
O
LT
S
)
•
B
low
er
m
ot
or s
top
s f
or
ov
er
/u
nder
vo
ltage
•
Bo
w
er
m
oto
r
st
op
s d
ue
t
o
PC
B
ov
er heat
in
g
•
H
igh A
C
li
ne
v
ol
ta
ge t
o I
D
bl
ow
er
•
Low
A
C
li
ne
v
ol
ta
ge t
o I
D
bl
ow
er
•
H
igh am
bi
en
t
te
m
per
at
ur
es
•
In
co
rre
ct
w
iri
ng
•
F
an/
m
ot
or
obs
tr
uc
tio
n o
r b
loc
kage
in
t
he
ai
rfl
ow
b7
E
_b
7
In
co
m
pl
ete
P
ar
am
ete
rs
S
en
t to
M
oto
r
(M
O
TO
R
PAR
AM
S)
ID
bl
ow
er
m
ot
or
doe
s no
t h
av
e
re
qu
ired
pa
ra
m
et
er
s t
o f
unc
tion
.
•
W
ro
ng
/ n
o s
har
ed
dat
a o
n t
he
net
w
ork
•
Loc
ke
d m
ot
or r
ot
or c
ond
iti
on
b9
E
_b
9
No Di
sp
la
y
Low
Indoo
r
A
irf
lo
w
(w
ith
out
E
lec
tr
ic
H
eat
m
ode
)
•
F
an/
m
ot
or obs
tr
uc
tio
n
or
b
loc
ked f
ilt
er
s
•
R
es
tri
ct
iv
e
du
ct
w
ork
or duc
tw
or
k
unde
rs
iz
ed
•
W
iri
ng
di
sc
on
ne
ct
ed
•
W
ro
ng out
doo
r/
in
doo
r
co
m
bi
na
tio
n
•
ID
m
oto
r f
ai
lu
re
9b
E_
9b
LO
W
ID
AI
R
EH
MO
D
E
Low
Indoo
r
A
irf
lo
w
(w
ith
E
lec
tr
ic
H
eat
m
ode
)
•
F
an/
m
ot
or obs
tr
uc
tio
n
or
b
loc
ked f
ilt
er
s
•
R
es
tri
ct
iv
e
du
ct
w
ork
or duc
tw
or
k
unde
rs
iz
ed
•
ID
m
oto
r f
ai
lu
re
•
W
iri
ng
di
sc
on
ne
ct
ed
70
E_
70
EEV O
PEN
C
K
T
EEV d
isc
on
ne
ct
io
n
de
te
cte
d
•
In
do
or
EEV c
oi
l n
ot
co
nn
ec
te
d
•
In
co
rre
ct
w
iri
ng
t
o E
E
V
73
E
_73
LI
Q
TE
M
P
F
LT
Li
qu
id s
ide
th
er
m
is
tor
ab
nor
m
al
ity
•
Ope
n (
or)
s
hort
c
irc
ui
t of
t
he
li
qu
id t
her
m
is
tor
(X
5A
)
•
Li
qu
id
t
her
m
is
tor
re
adi
ng
in
co
rr
ec
t o
r v
al
ues
o
ut
si
de
th
e no
rm
al
r
ang
e
74
E
_74
G
A
S
T
E
M
P
F
LT
G
as
s
ide
t
herm
is
tor
abno
rm
al
ity
•
Ope
n (
or)
s
hort
c
irc
ui
t of
t
he
ga
s t
her
m
is
tor
(X
5A
)
•
Gas
t
herm
is
tor
rea
di
ng
in
co
rr
ec
t or
v
al
ue
s ou
ts
id
e t
he
nor
m
al
ra
nge
75
E
_75
P
R
E
S
S
U
R
E
F
LT
P
re
ss
ure
s
ens
or
a
bnor
m
al
ity
•
O
pe
n (
or
) sh
or
t ci
rc
ui
t o
f th
e P
re
ssu
re
se
ns
or
(
X1
5A
)
•
P
res
su
re
s
ens
or
rea
di
ng
in
co
rr
ec
t or
v
al
ue
s ou
ts
id
e t
he
nor
m
al
ra
nge
77
E
_7
7
TS
TA
T I
D
N
O
C
O
M
In
door
U
ni
t -
Ther
m
os
ta
t
co
m
m
uni
ca
tio
n er
ror
(s
ta
rt
-up
&
du
ring
op
erat
ion)
•
In
co
rre
ct
w
iri
ng
be
tw
ee
n I
D
uni
t an
d t
her
m
os
tat
.
T
he
sy
st
em
m
ay
h
av
e
th
e c
om
m
un
ic
at
io
n e
rro
r w
ith
out
er
ror
c
ode
77
on
t
he
in
do
or
PC
B.
F
ol
lo
w
se
ct
io
n
16
.6
SYST
EM
T
R
O
U
BL
ESH
O
O
T
IN
G
•
T
he
rm
os
ta
t f
ailu
re
•
P
ow
er
in
te
rr
upt
ion (l
ow
v
ol
tag
e)
Er
ro
r
Co
d
e
D
e
sc
ri
p
ti
o
n
P
o
ssi
b
le
C
a
u
se
s
C
li
m
at
eT
al
k M
e
ss
a
g
e
P
C
B L
E
D
Di
sp
la
y
•
Ch
ec
k
fo
r
ob
st
ruc
tion
on
t
he f
an/
m
ot
or
/du
ct
wo
rk
•
V
er
ify
t
he
inpu
t v
ol
tage
at
t
he
m
ot
or
•
C
he
ck
filt
er
s,
g
rills
, d
uc
t s
ys
te
m
, c
oil a
ir in
le
t/
ou
tle
t
fo
r
bl
oc
ka
ge
s.
•
Re
pl
ac
e m
ot
or
•
V
eri
fy
li
ne
v
ol
ta
ge
to
bl
ow
er
is
w
ith
in
t
he
ra
nge
s
pec
ifi
ed o
n t
he
ID
bl
ow
er
rat
ing
pl
at
e
•
S
ee
"I
ns
ta
lla
tio
n I
ns
tr
uc
tio
ns
" f
or
in
st
al
la
tion
re
qui
re
m
ent
s
•
C
hec
k p
ow
er
t
o ai
r ha
ndl
er
bl
ow
er
•
C
hec
k f
or o
bs
truc
tio
n on
t
he
fan/
m
ot
or
/du
ct
w
ork
•
C
hec
k
w
iri
ng
•
R
epl
ac
e m
ot
or
•
C
hec
k f
or l
oc
ke
d r
ot
or c
ond
iti
on (
see
ab
ov
e e
rro
r c
ode
fo
r de
ta
ils
)
•
R
epl
ac
e c
irc
ui
t boa
rd or m
ot
or
•
C
hec
k f
or o
bs
truc
tio
n on
t
he
fan/
m
ot
or
•
C
hec
k d
uc
tw
ork
/fi
lte
r f
or b
loc
ka
ge
,
cl
ea
n f
ilt
ers
•
Re
m
ov
e ob
st
ru
ct
io
n.
V
er
ify
a
ll
re
gi
st
er
s
ar
e f
ul
ly
o
pe
n
•
C
hec
k t
he
co
nnec
tion
s a
nd
t
he r
ot
at
ion
of
t
he
m
ot
or
•
V
eri
fy
t
he i
nput
v
ol
ta
ge
at
t
he m
ot
or
•
V
eri
fy
du
ct
w
ork
is
a
ppr
opr
ia
te
ly
s
iz
ed f
or s
ys
tem
. R
es
iz
e/
re
pl
ac
e d
uc
tw
ork
if
nee
ded
•
R
epl
ac
e m
ot
or
•
C
hec
k f
or o
bs
truc
tio
n on
t
he
fan/
m
ot
or
•
C
hec
k d
uc
tw
ork
/fi
lte
r f
or b
loc
ka
ge
,
cl
ea
n f
ilt
ers
•
Re
m
ov
e ob
st
ru
ct
io
n.
V
er
ify
a
ll
re
gi
st
er
s
ar
e f
ul
ly
o
pe
n
•
C
hec
k t
he
co
nnec
tion
s a
nd
t
he r
ot
at
ion
of
t
he
m
ot
or
•
V
eri
fy
t
he i
nput
v
ol
ta
ge
at
t
he m
ot
or
•
V
eri
fy
du
ct
w
ork
is
a
ppr
opr
ia
te
ly
s
iz
ed f
or s
ys
tem
. R
es
iz
e/
re
pl
ac
e d
uc
tw
ork
if
nee
ded
•
R
epl
ac
e m
ot
or
•
C
he
ck
In
do
or
EEV
co
il
co
nn
ec
tio
n (
P
C
B
a
nd
ju
nc
tio
n
co
nn
ec
to
r)
•
R
ep
la
ce
EEV
co
il
•
C
he
ck
th
e
re
si
st
an
ce
v
al
ue
o
f EEV co
il (
re
fe
r se
rv
ic
e m
an
ua
l)
•
R
epl
ac
e t
he
c
ont
ro
l b
oar
d
•
C
hec
k t
he
co
nnec
tion
t
o l
iq
ui
d
th
er
m
is
to
r (
P
C
B
an
d j
unc
tion
co
nnec
to
r)
•
C
hec
k t
he
res
is
ta
nc
e v
al
ue
o
f t
he t
her
m
is
tor
(r
ef
er
s
erv
ic
e
m
anua
l)
•
Re
pl
ac
e t
her
m
is
tor
•
R
epl
ac
e t
he
c
ont
ro
l b
oar
d
•
C
hec
k t
he
co
nnec
tion
t
o ga
s
th
er
m
is
to
r (
P
C
B
an
d j
unc
tion
co
nnec
to
r)
•
C
hec
k t
he
res
is
ta
nc
e v
al
ue
o
f t
he t
her
m
is
tor
(r
ef
er
s
erv
ic
e
m
anua
l)
•
Re
pl
ac
e t
her
m
is
tor
•
R
epl
ac
e t
he
c
ont
ro
l b
oar
d
•
C
hec
k t
he
co
nnec
tion
t
o pr
es
su
re
s
ens
or
(P
C
B
a
nd
junc
tion
c
onne
ct
or
)
•
C
hec
k t
he
out
put
v
ol
ta
ge
of
t
he
pr
es
su
re
s
ens
or
(
ref
er
s
erv
ic
e m
anu
al
)
•
R
epl
ac
e pre
ss
ure s
en
sor
•
R
epl
ac
e t
he
c
ont
ro
l b
oar
d
•
C
hec
k f
or t
her
m
os
ta
t a
nd
in
door
un
it w
iri
ng
•
V
eri
fy
t
he i
nput
v
ol
ta
ge
at
t
he I
D
uni
t an
d t
her
m
os
ta
t
A
ft
er
r
ec
ov
er
in
g t
he
s
ys
te
m
w
ith
p
ow
er
s
up
ply
, T
S
T
A
T
ID
N
O
C
O
M
w
ill c
on
tin
ue
t
o b
e
di
sp
la
ye
d o
n t
he
t
he
rm
os
ta
t
w
ith
in
2
m
in
ut
es
.
Th
e e
rr
or
c
od
e w
ill b
e c
le
ar
ed
a
ut
om
at
ic
ally
.
•
R
epl
ac
e
co
nt
ro
l bo
ard
or
t
her
m
os
ta
t
•
P
res
s "
LE
A
R
N
" b
ut
ton
on
P
C
B
fo
r m
or
e t
han
5
se
cond
s t
o r
ees
ta
bl
is
h
net
w
or
k
Co
rr
e
ct
iv
e
Ac
ti
o
n
s
