22
TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
Dia
gnos
ti
c
/Sta
tu
s
LED Code
s
ComfortNet™
T
h
ermostat Onl
y
S
y
m
p
toms of
A
b
normal
Op
eratio
n
(L
eg
a
c
y
&
ComfortNet™ T
h
ermost
at)
G
ree
n
Y
e
llow
R
ed
R
ed Y
1
Fa
ult
De
s
c
ription
Mess
ag
e
C
ode
Possible Cau
se
s
C
o
rrect
iv
e A
c
ti
on
s
Not
e
s
& Ca
utions
x
C
o
mpre
ss
or
a
nd out
do
or fa
n
a
re
off.
x
C
o
mpre
ss
or
pr
ot
e
c
to
r t
rip
s f
o
u
r
c
o
ns
ec
ut
iv
e
t
imes.
x
Av
erage
r
un
time
betw
een
tr
ip
s i
s
le
ss
th
an
15
s
e
c
o
n
d
s
.
x
Int
egr
at
ed co
ntr
ol modu
le
dia
gn
ost
ic/
st
atu
s
LE
D
’s
d
is
p
lay
the
in
dic
at
ed
co
de
.
x
ComfortN
et™ th
er
most
at “Call fo
r
S
e
rv
ice” i
c
o
n
il
lum
inat
ed
.
x
ComfortN
et™ th
er
most
at sc
roll
s
“C
he
ck A
ir C
o
ndi
ti
one
r”
or
“C
he
ck H
eat
P
u
m
p
” me
ss
ag
e.
OFF
4
Flas
he
s
ON
ON if
call
p
res
en
t
; OFF if
no cal
l
x
Loc
ke
d
R
o
to
r
L
O
CKED
ROTOR
04
x
C
o
mpre
ss
or
b
e
ar
in
gs
are
s
e
iz
ed
.
x
Faile
d c
o
mp
re
ss
o
r r
u
n
cap
ac
ito
r.
x
F
a
ulty
run
ca
pa
cit
or
wi
ri
n
g
.
x
F
a
ulty
comp
re
ss
o
r
wi
ri
n
g
.
x
Low
line
v
o
ltag
e.
x
Chec
k
c
o
mp
re
ss
o
r
ope
ra
tio
n;
rep
air
/r
epl
ac
e as
nee
de
d.
x
Ch
e
c
k
ru
n
c
a
pa
ci
to
r;
r
e
p
lac
e
as ne
ed
ed.
x
Ch
e
c
k
w
iring
;
rep
air
/r
epl
ac
e as
nee
de
d.
x
Verify
line v
o
lta
ge
is w
ithin
r
a
n
g
e
on
rati
ng
pl
at
e;
con
ta
ct loc
al uti
lity
if
o
u
t of ra
ng
e.
x
Tu
rn
p
o
w
e
r
OFF
pri
or t
o
re
pai
r.
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
).
x
C
o
mpre
ss
or
a
nd out
do
or fa
n
a
re
off
for
g
re
a
te
r t
h
a
n
4
ho
ur
s.
x
Low
pre
ss
ur
e a
n
d
hig
h
pr
es
sur
e
sw
itche
s a
re
cl
os
e
d
.
x
Int
egr
at
ed co
ntr
ol modu
le
dia
gn
ost
ic/
st
atu
s
LE
D
’s
d
is
p
lay
the
in
dic
at
ed
co
de
.
x
ComfortN
et™ th
er
most
at “Call fo
r
S
e
rv
ice” i
c
o
n
il
lum
inat
ed
.
x
ComfortN
et™ th
er
most
at sc
roll
s
“C
he
ck A
ir C
o
ndi
ti
one
r”
or
“C
he
ck H
eat
P
u
m
p
” me
ss
ag
e.
OFF
5
Flas
he
s
OFF
ON if
call
p
res
en
t
; OFF if
no cal
l
x
Open
C
irc
uit
OPEN
CIRCUIT
05
x
Pow
e
r
is
d
isc
on
ne
c
te
d
.
x
Faile
d
c
o
mp
re
ss
o
r
p
rot
ec
to
r.
x
Compre
ss
or
n
o
t
p
rop
er
ly
w
ir
e
d
t
o
con
tr
ol.
x
Ch
e
c
k
circ
u
it
b
rea
ke
rs
an
d
fu
se
s.
x
Ch
e
c
k
w
ir
ing
to
unit
; r
e
p
a
ir
/r
epl
ac
e
as ne
ed
ed.
x
Chec
k
c
o
mp
re
ss
o
r;
rep
air
/r
epl
ac
e as
nee
de
d.
x
Chec
k
c
o
mp
re
ss
o
r
wi
ri
n
g
;
rep
air
/r
epl
ac
e as
nee
de
d.
x
Tu
rn
p
o
w
e
r
OFF
pri
or t
o
re
pai
r.
x
Fault
w
ill cle
ar aft
er
1
no
rm
al
c
y
c
le
.
x
F
a
ult m
a
y
be
cle
ar
ed by
cy
cling
24V
A
C
to
co
ntr
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
ss
or
a
nd out
do
or fa
n
a
re
off.
x
Low
pre
ss
ur
e a
n
d
hig
h
pr
es
sur
e
sw
itche
s a
re
cl
os
e
d
.
x
Int
egr
at
ed co
ntr
ol modu
le
dia
gn
ost
ic/
st
atu
s
LE
D
’s
d
is
p
lay
the
in
dic
at
ed
co
de
.
x
ComfortN
et™ th
er
most
at “Call fo
r
S
e
rv
ice” i
c
o
n
il
lum
inat
ed
.
x
ComfortN
et™ th
er
most
at sc
roll
s
“C
he
ck A
ir C
o
ndi
ti
one
r”
or
“C
he
ck H
eat
P
u
m
p
” me
ss
ag
e.
OFF
6
Flas
he
s
OFF
ON if
call
p
res
en
t
; OFF if
no cal
l
x
O
p
en
S
tar
t
Circuit
OPEN
STAR
T
06
x
C
o
mpre
ss
or
st
art
w
inding is op
en
.
x
Faile
d c
o
mp
re
ss
o
r r
u
n
cap
ac
ito
r.
x
F
a
ulty
run
ca
pa
cit
or
wi
ri
n
g
.
x
Compre
ss
or
n
o
t
p
rop
er
ly
w
ir
e
d
t
o
con
tr
ol.
x
F
a
ulty
comp
re
ss
o
r
wi
ri
n
g
.
x
Chec
k
c
o
mp
re
ss
o
r;
rep
air
/r
epl
ac
e as
nee
de
d.
x
Ch
e
c
k
ru
n
c
a
pa
ci
to
r;
r
e
p
lac
e
as ne
ed
ed.
x
Ch
e
c
k
w
iring
;
rep
air
/r
epl
ac
e as
nee
de
d.
x
Tu
rn
p
o
w
e
r
OFF
pri
or t
o
re
pai
r.
x
Fault
w
ill cle
ar aft
er
1
no
rm
al
c
y
c
le
.
x
F
a
ult m
a
y
be
cle
ar
ed by
cy
cling
24V
A
C
to
co
ntr
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
ss
or
a
nd out
do
or fa
n
a
re
off.
x
Low
pre
ss
ur
e a
n
d
hig
h
pr
es
sur
e
sw
itche
s a
re
cl
os
e
d
.
x
O
pen st
art
ci
rc
uit
has
b
e
e
n
det
ect
ed
4
time
s
w
ith 5 min
ut
e
del
ay
betw
een ea
ch det
ec
tio
n.
x
Int
egr
at
ed co
ntr
ol modu
le
dia
gn
ost
ic/
st
atu
s
LE
D
’s
d
is
p
lay
the
in
dic
at
ed
co
de
.
x
ComfortN
et™ th
er
most
at “Call fo
r
S
e
rv
ice” i
c
o
n
il
lum
inat
ed
.
x
ComfortN
et™ th
er
most
at sc
roll
s
“C
he
ck A
ir C
o
ndi
ti
one
r”
or
“C
he
ck H
eat
P
u
m
p
” me
ss
ag
e.
OFF
6
Flas
he
s
ON
ON if
call
p
res
en
t
; OFF if
no cal
l
x
O
p
en
S
tar
t
Circuit
Loc
ko
ut
OPEN
STAR
T
LO
C
K
06
x
C
o
mpre
ss
or
st
art
w
inding is op
en
.
x
Faile
d c
o
mp
re
ss
o
r r
u
n
cap
ac
ito
r.
x
F
a
ulty
run
ca
pa
cit
or
wi
ri
n
g
.
x
Compre
ss
or
n
o
t
p
rop
er
ly
w
ir
e
d
t
o
con
tr
ol.
x
F
a
ulty
comp
re
ss
o
r
w
iring.
x
Chec
k
c
o
mp
re
ss
o
r;
rep
air
/r
epl
ac
e as
nee
de
d.
x
Ch
e
c
k
ru
n
c
a
pa
ci
to
r;
r
e
p
lac
e
as ne
ed
ed.
x
Ch
e
c
k
w
iring
;
rep
air
/r
epl
ac
e as
nee
de
d.
x
Tu
rn
p
o
w
e
r
OFF
pri
or t
o
re
pai
r.
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
).