20
TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
S
y
m
p
toms of
A
b
normal
O
p
eratio
n
(L
eg
a
c
y
&
ComfortNet™ T
h
ermost
at)
Dia
gnos
ti
c
/Sta
tu
s
LED Code
s
Fa
ult
De
s
c
ript
ion
ComfortNet™
T
h
ermo
stat On
ly
P
o
ssib
le C
a
u
s
e
s
Co
rrect
iv
e A
c
ti
on
s
Not
e
s
& Ca
utions
G
ree
n
Y
e
llow
R
ed
R
ed Y
1
Mess
a
g
e
C
ode
x
A
ir co
nd
iti
on
er/
h
e
a
t
pump
fa
ils
to ope
ra
te.
x
Int
egr
at
ed co
ntr
o
l modu
le
dia
g
n
o
st
ic/
st
atu
s
LE
D
’s
dis
p
lay
the
in
di
cat
ed
co
de.
x
ComfortN
et™ th
er
most
at “Call
fo
r Se
rv
ic
e
” ic
on
il
lu
m
ina
te
d
.
x
ComfortN
et™
th
er
most
at
scr
oll
s
“C
he
ck A
ir
C
ondi
tio
ne
r”
or
“C
he
ck H
e
at
P
u
mp”
mess
a
g
e
.
5
Fla
s
he
s
5
Fla
s
he
s
OFF OFF
x
Inv
a
lid
Memory
Card D
a
ta
.
INVALID
MC DATA
d4
x
S
h
are
d
dat
a
on
memory
card has
b
e
en
r
e
je
ct
ed
.
x
V
e
rify
sy
stem ty
pe
(c
o
m
mu
n
ic
a
ti
ng
or
leg
acy
).
x
V
e
rify
sha
re
d d
a
ta
is
cor
re
ct for
y
o
ur
spe
cif
ic m
o
d
e
l;
re
-
pop
ul
ate
d
a
ta
if
req
u
ir
ed
.
x
W
ir
e
sy
stem
a
s
leg
acy
sy
stem.
x
T
u
rn
pow
e
r OF
F
p
rior
to
rep
a
ir
.
x
U
s
e mem
o
ry
car
d
for
y
o
ur sp
eci
fic
mod
el.
x
Insert memory
card
BEFO
RE t
u
rn
in
g
p
o
w
e
r
ON. Memory
card may
be remov
ed aft
er dat
a
i
s
lo
ad
ed
. Tur
n
p
o
w
e
r
OF
F
befor
e
remov
ing
memory
card.
x
Error
co
de
w
ill be
cle
ar
ed
on
ce
d
a
ta
is
lo
ad
ed
.
x
V
e
ry
long
ru
n tim
e
.
x
F
our
co
ns
ec
utiv
e
comp
re
ss
or
pro
te
c
to
r t
rip
s w
ith
av
erag
e
run
time
b
e
tw
een
trip
s
gre
a
te
r
th
an
3 ho
ur
s
.
x
C
o
mpre
ss
or
o
per
atin
g at hig
h
spe
e
d
a
nd
ou
td
oo
r fa
n
ope
ra
tin
g
at l
o
w
spee
d
x
Int
egr
at
ed co
ntr
o
l modu
le
d
iag
no
s
ti
c
/s
ta
tus
L
E
D’
s
dis
p
lay
the
in
di
cat
ed
co
de.
OFF
1 Flas
h
OFF
ON if call
p
res
en
t;
OFF if no
call
x
Low
S
ide
F
ault.
LO
W S
ID
E
FAUL
T
01
x
Low
refr
ig
er
ant
cha
rg
e
.
x
R
e
str
ict
io
n
i
n
li
qui
d
line
.
x
In
do
or
bl
o
w
e
r moto
r
fail
ur
e.
x
I
n
do
or
th
e
rmo
st
a
t
s
e
t
ex
tremely
low
.
x
V
e
rify
refr
ige
ra
n
t
c
h
ar
ge
; a
d
ju
s
t a
s
nee
d
e
d
.
x
C
h
ec
k
fo
r
re
str
ict
e
d
liqu
id lin
e;
rep
air
/r
e
pl
ac
e as
n
e
ed
ed
.
x
Ch
e
c
k
in
do
or
bl
ow
e
r
motor
; r
e
p
a
ir
/r
epl
a
ce
as ne
ed
ed.
x
Ch
e
c
k
in
do
or
th
er
mo
st
at
se
tt
in
g.
x
T
u
rn
pow
e
r OF
F
p
rior
to
rep
a
ir
.
x
Fault
w
ill cle
ar aft
e
r 30
c
o
ns
ec
ut
iv
e
n
o
rm
a
l
cy
cles.
x
F
a
ult m
a
y
be cl
ea
red
by
cy
cling 24V
A
C
to
con
tr
ol.
x
Re
p
lac
e w
it
h
co
rr
e
c
t
re
pl
ac
e
m
en
t p
a
rt
(s
).
x
C
o
mpre
s
s
o
r
a
nd out
do
or fa
n
are
of
f.
x
T
h
ermo
s
ta
t
dema
nd
is
pre
s
e
n
t.
x
Int
egr
at
ed co
ntr
o
l modu
le
d
iag
no
s
ti
c
/s
ta
tus
L
E
D’
s
dis
p
lay
the
in
di
cat
ed
co
de.
ON
1 Flash
OFF
ON if call
p
res
en
t;
OFF if no
call
x
Low
Press
ur
e Cu
t
Out Tri
p
.
L
PS OPEN
0
1
x
Low
refr
ig
er
ant
cha
rg
e
.
x
R
e
str
ict
io
n
i
n
li
qui
d
line
.
x
In
do
or
bl
o
w
e
r moto
r
fail
ur
e.
x
I
n
do
or
th
e
rmo
st
a
t
s
e
t
ex
tremely
low
.
x
V
e
rify
refr
ige
ra
n
t
c
h
ar
ge
; a
d
ju
s
t a
s
n
e
ed
ed
.
x
C
h
ec
k
fo
r
re
str
ict
e
d
liqu
id lin
e;
rep
a
ir
/r
epl
a
c
e
as
nee
d
e
d
.
x
Ch
e
c
k
in
do
or
bl
ow
e
r
motor
; r
e
p
a
ir
/r
epl
a
ce
as ne
ed
ed.
x
C
h
ec
k l
o
w
pre
s
s
u
re
sw
itch; re
pai
r/r
ep
la
ce
as ne
ed
ed.
x
Ch
e
c
k
in
do
or
th
er
mo
st
at
se
tt
in
g.
x
T
u
rn
pow
e
r OF
F
p
rior
to
rep
a
ir
.
x
Re
p
lac
e w
it
h
co
rr
e
c
t
re
pl
ac
e
m
en
t p
a
rt
(s
).
x
C
o
mpre
s
s
o
r
a
nd out
do
or fa
n
are
of
f.
x
Low
pre
s
s
u
re
sw
it
ch
tri
p 3
times
w
ithin
sam
e
th
ermo
st
at
d
e
m
an
d.
x
T
hermo
st
at
dema
nd
is
p
res
en
t.
x
Int
egr
at
ed co
ntr
o
l modu
le
d
iag
no
s
ti
c
/s
ta
tus
L
E
D’
s
dis
p
lay
the
in
di
cat
ed
co
de.
x
ComfortN
et™ th
er
most
at “Call
fo
r Se
rv
ic
e
” ic
on
il
lu
m
ina
te
d
.
x
ComfortN
et™
th
er
most
a
t
scr
oll
s
“C
he
ck A
ir
C
ondi
tio
ne
r”
or
“C
he
ck H
eat
P
u
mp”
mess
ag
e.
ON
1 Flash
ON
ON if call
pre
s
e
n
t;
OFF if no
call
x
Low
Press
ur
e Cu
t
Ou
t Lo
ck
ou
t
(3 Tri
ps
).
L
PS
LO
C
K
O
U
T
01
x
Low
refr
ig
er
ant
cha
rg
e
.
x
R
e
str
ict
io
n
i
n
li
qui
d
line
.
x
In
do
or
bl
o
w
e
r moto
r
fail
ur
e.
x
I
n
do
or
th
e
rmo
st
a
t
s
e
t
ex
tremely
low
.
x
V
e
rify
refr
ige
ra
n
t
c
h
ar
ge
; a
d
ju
s
t a
s
n
e
ed
ed
.
x
C
h
ec
k
fo
r
re
str
ict
e
d
liqu
id lin
e;
rep
air
/r
e
pl
ac
e as
nee
d
e
d
.
x
Ch
e
c
k
in
do
or
bl
ow
e
r
motor
; r
e
p
a
ir
/r
epl
a
c
e
as ne
ed
ed.
x
C
h
ec
k l
o
w
pre
s
s
u
re
sw
itch; re
pai
r/r
e
p
lace
as ne
ed
ed.
x
Ch
e
c
k
in
do
or
th
er
mo
st
at
se
tt
in
g.
x
T
u
rn
pow
er OF
F
p
rior
to
rep
a
ir
.
x
Mu
s
t
c
le
a
r fa
u
lt b
y
cy
cling 24V
A
C
to
con
tr
ol.
x
Re
p
lac
e w
it
h
co
rr
e
c
t
re
pl
ac
e
m
en
t p
a
rt
(s
).