
SERVICING
31
INDOOR UNIT ERROR CODES
INDOOR UNIT ERROR CODES
b4
E_b4
Bl
ow
er
T
rip or
Los
t
Ro
to
r (
M
OT
OR T
RI
PS
)
Bl
ow
er
M
ot
or
- C
ur
rent
T
rip (
or
) Los
t
Rot
or
•
F
an/
m
ot
or
obs
truc
tion or
abnor
m
al m
ot
or
loadi
ng
•
P
ow
er
int
er
rupt
ion (
low
vol
tage)
•
H
igh l
oadi
ng c
ondi
tions
, bl
oc
ked f
ilter
s
•
B
loc
kage i
n t
he ai
rflow
(duc
tw
or
k)
or
duc
tw
or
k under
siz
ed
•
C
hec
k f
or
obs
truc
tion on t
he f
an/
m
ot
or
/duc
tw
or
k
•
V
er
ify
the i
nput
vol
tage at
the m
ot
or
•
C
hec
k f
ilter
s,
gr
ills
, duc
t s
ys
tem
, c
oil
ai
r i
nlet
/out
let
for
bl
oc
kages
.
•
R
epl
ac
e m
ot
or
b6
E_b6
Vol
tage or
T
em
per
at
ur
e
Tr
ip (
M
OT
OR
V
OL
TS
)
•
B
low
er
m
ot
or
s
tops
for
ov
er
/under
vol
tage
•
B
ow
er
m
ot
or
s
tops
due t
o P
CB
ov
er
heat
ing
•
H
igh A
C l
ine v
olt
age t
o I
D bl
ow
er
•
Low
A
C l
ine v
olt
age t
o I
D bl
ow
er
•
H
igh am
bient
tem
per
at
ur
es
•
F
an/
m
ot
or
obs
truc
tion or
bl
oc
kage i
n t
he ai
rflow
•
V
er
ify
line v
olt
age t
o bl
ow
er
is
w
ithi
n t
he r
ange s
pec
ified on t
he I
D bl
ow
er
rat
ing pl
at
e
•
S
ee "
Ins
tal
lat
ion I
ns
truc
tions
" f
or
ins
tal
lat
ion r
equi
rem
ent
s
•
C
hec
k pow
er
to ai
r handl
er
bl
ow
er
•
C
hec
k f
or
obs
truc
tion on t
he f
an/
m
ot
or
/duc
tw
or
k
•
C
hec
k w
iring
•
R
epl
ac
e m
ot
or
b7
E_b7
Inc
om
plet
e P
ar
am
et
er
s
Send t
o M
ot
or
(M
OT
OR
PAR
AM
S)
ID
bl
ow
er
m
ot
or
does
not
hav
e
requi
red par
am
et
er
s t
o f
unc
tion.
M
ot
or
fai
ls t
o s
tar
t 40 c
ons
ec
ut
ive
tim
es
.
•
W
rong /
no s
har
ed dat
a on t
he net
wor
k
•
Loc
ked m
ot
or
rot
or
c
ondi
tion
•
C
hec
k f
or
loc
ked r
ot
or
c
ondi
tion (
see abov
e er
ror
c
ode f
or
det
ail
s)
•
R
epl
ac
e c
irc
uit
boar
d or
m
ot
or
b9
E_b9
No D
ispl
ay
Low
Indoor
A
irfl
ow
(w
ithout
E
lec
tri
c
Heat
m
ode)
•
F
an/
m
ot
or
obs
truc
tion or
bl
oc
ked f
ilter
s
•
R
es
tri
ct
ive duc
tw
or
k or
duc
tw
or
k under
siz
ed
•
ID
m
ot
or
fai
lur
e
•
C
hec
k f
or
obs
truc
tion on t
he f
an/
m
ot
or
•
C
hec
k duc
tw
or
k/
filt
er
for
bl
oc
kage,
c
lean f
ilter
s
•
R
em
ov
e obs
truc
tion.
V
er
ify
al
l r
egi
st
er
s ar
e f
ull
y open
•
C
hec
k t
he c
onnec
tions
and t
he r
ot
at
ion of
the m
ot
or
•
V
er
ify
the i
nput
vol
tage at
the m
ot
or
•
V
er
ify
duc
tw
or
k i
s appr
opr
iat
ely
s
ized f
or
s
ys
tem
. R
es
ize/
repl
ac
e duc
tw
or
k i
f needed
•
R
epl
ac
e m
ot
or
9b
E_9b
LO
W
ID A
IR E
H M
ODE
Low
Indoor
A
irfl
ow
(w
ith E
lec
tri
c
Heat
m
ode)
•
F
an/
m
ot
or
obs
truc
tion or
bl
oc
ked f
ilter
s
•
R
es
tri
ct
ive duc
tw
or
k or
duc
tw
or
k under
siz
ed
•
ID
m
ot
or
fai
lur
e
•
C
om
binat
ion m
ist
ak
e of
out
door
uni
t and i
ndoor
uni
t
•
C
hec
k f
or
obs
truc
tion on t
he f
an/
m
ot
or
•
C
hec
k duc
tw
or
k/
filt
er
for
bl
oc
kage,
c
lean f
ilter
s
•
R
em
ov
e obs
truc
tion.
V
er
ify
al
l r
egi
st
er
s ar
e f
ull
y open
•
C
hec
k t
he c
onnec
tions
and t
he r
ot
at
ion of
the m
ot
or
•
V
er
ify
the i
nput
vol
tage at
the m
ot
or
•
V
er
ify
duc
tw
or
k i
s appr
opr
iat
ely
s
ized f
or
s
ys
tem
. R
es
ize/
repl
ac
e duc
tw
or
k i
f needed
•
R
epl
ac
e m
ot
or
70
E_70
EEV O
PEN
C
KT
EE
V di
sc
onnec
tion det
ec
ted
•
Indoor
E
EV
c
oil
not
c
onnec
ted
•
Inc
or
rec
t w
iring t
o E
EV
•
C
hec
k I
ndoor
E
EV
c
oil
c
onnec
tion (
PC
B and j
unc
tion c
onnec
tor
)
•
R
epl
ac
e E
EV
c
oil
•
C
hec
k t
he r
es
ist
anc
e v
alue of
E
EV
c
oil
(r
efer
s
er
vic
e m
anual
)
•
R
epl
ac
e t
he c
ont
rol
boar
d
73
E_73
LIQ
T
EM
P F
LT
Liqui
d s
ide t
her
m
ist
or
abnor
m
ali
ty
•
O
pen (
or
) s
hor
t c
irc
uit
of
the l
iqui
d t
her
m
ist
or
(X
5A
)
•
Li
qui
d t
her
m
ist
or
readi
ng i
nc
or
rec
t or
val
ues
out
side t
he nor
m
al r
ange
•
C
hec
k t
he c
onnec
tion t
o l
iqui
d t
her
m
ist
or
(P
CB
and j
unc
tion c
onnec
tor
)
•
C
hec
k t
he r
es
ist
anc
e v
alue of
the t
her
m
ist
or
(r
efer
s
er
vic
e m
anual
)
•
R
epl
ac
e t
her
m
ist
or
•
R
epl
ac
e t
he c
ont
rol
boar
d
74
E_74
GAS T
EM
P F
LT
Gas
s
ide t
her
m
ist
or
abnor
m
ali
ty
•
O
pen (
or
) s
hor
t c
irc
uit
of
the gas
ther
m
ist
or
(X
5A
)
•
G
as
ther
m
ist
or
readi
ng i
nc
or
rec
t or
val
ues
out
side t
he nor
m
al r
ange
•
C
hec
k t
he c
onnec
tion t
o gas
ther
m
ist
or
(P
CB
and j
unc
tion c
onnec
tor
)
•
C
hec
k t
he r
es
ist
anc
e v
alue of
the t
her
m
ist
or
(r
efer
s
er
vic
e m
anual
)
•
R
epl
ac
e t
her
m
ist
or
•
R
epl
ac
e t
he c
ont
rol
boar
d
75
E_75
PR
ESSU
RE F
LT
Pr
es
sur
e s
ens
or
abnor
m
ali
ty
•
O
pen (
or
) s
hor
t c
irc
uit
of
the P
res
sur
e s
ens
or
(X
15A
)
•
P
res
sur
e s
ens
or
readi
ng i
nc
or
rec
t or
val
ues
out
side t
he nor
m
al r
ange
•
C
hec
k t
he c
onnec
tion t
o pr
es
sur
e s
ens
or
(P
CB
and j
unc
tion c
onnec
tor
)
•
C
hec
k t
he out
put
vol
tage of
the pr
es
sur
e s
ens
or
(r
efer
s
er
vic
e m
anual
)
•
R
epl
ac
e pr
es
sur
e s
ens
or
•
R
epl
ac
e t
he c
ont
rol
boar
d
77
E_77
No D
ispl
ay
Indoor
U
nit
- T
her
m
os
tat
com
m
uni
cat
ion er
ror
(s
tar
t-up &
dur
ing oper
at
ion)
•
Inc
or
rec
t w
iring bet
ween I
D uni
t and t
her
m
os
tat
•
T
her
m
os
tat
fai
lur
e
•
P
ow
er
int
er
rupt
ion (
low
vol
tage)
•
C
hec
k f
or
ther
m
os
tat
and i
ndoor
uni
t w
iring
•
V
er
ify
the i
nput
vol
tage at
the I
D uni
t and t
her
m
os
tat
•
R
epl
ac
e c
ont
rol
boar
d or
ther
m
os
tat
•
P
res
s "
LE
AR
N"
but
ton on P
CB
for
m
or
e t
han 5 s
ec
onds
to r
ees
tabl
ish net
wor
k
Co
rre
cti
ve
A
cti
on
s
Erro
r
Co
de
De
sc
rip
tio
n
Po
ss
ib
le
C
au
se
s
Cl
im
at
eT
al
k M
es
sag
e
PCB
LE
D
Di
sp
la
y