SERVICING
43
Co
m
fo
r
tNet ™
Therm
ost
a
t On
ly
Sym
ptom
s of A
bnor
m
a
l Opera
ti
on
(Comm
unicating &
Non-com
m
unicat
in
g
Therm
ost
at)
D
ia
g
no
st
ic
/St
a
tus
LED Codes
Fault De
scr
ipt
ion
Messa
ge
Code
P
o
ss
ib
le C
a
u
se
s
Correct
ive Action
s
No
tes
& Ca
utio
ns
x
Ai
r h
and
le
r fail
s
to
op
erat
e.
x
Int
egr
ate
d
c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
i
ndi
cat
ed
erro
r
co
d
e.
x
Com
fortNet
therm
o
stat “
C
all for Se
rvice”
ico
n
il
lum
ina
te
d.
x
Com
fortNet
therm
o
stat sc
ro
ll
s “
C
heck A
ir
H
and
ler” m
essa
ge.
6 Fla
she
s
x
Circ
ul
at
or bl
ow
er
m
o
tor
is
n
o
t ru
nni
ng
wh
en
it
shou
ld
be runn
ing
.
MOTOR
NOT RUN
b0
x
L
o
o
se w
ir
in
g
c
o
nne
ct
io
n a
t
circ
ul
at
or m
o
tor
pow
er lea
d
s or
circ
ul
at
or m
o
tor
pow
er lea
d
s
di
sc
on
ne
cte
d
.
x
Fail
ed
ci
rcul
ato
r
b
lower
m
o
to
r.
x
Tighte
n
or c
o
rrec
t wiring
co
nne
ct
ion.
x
Ch
eck
ci
rcu
lato
r blower
m
o
to
r.
Replace if
nece
ssa
ry
.
x
T
u
rn
pow
er O
FF pr
io
r to
repa
ir
x
Replace c
irc
ulator m
o
tor
with cor
rec
t re
pla
cem
ent
par
t.
x
Ai
r h
and
le
r fail
s
to
op
erat
e.
x
Int
egr
ate
d
c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
i
ndi
cat
ed
erro
r
co
d
e.
x
Com
fortNet
therm
o
stat “
C
all for Se
rvice”
ico
n
il
lum
ina
te
d.
x
Com
fortNet
therm
o
stat sc
ro
ll
s “
C
heck A
ir
H
and
ler” m
essa
ge.
6 Fla
she
s
x
Int
egr
ate
d c
o
ntr
o
l
m
odule has lo
st
co
mm
u
n
icatio
ns
wit
h
circ
ul
at
or bl
ow
er
m
o
tor.
MOTOR
COMM
b1
x
L
o
o
se w
ir
in
g
c
o
nne
ct
io
n a
t
circ
ul
at
or m
o
tor c
o
nt
rol
lea
d
s.
x
Fail
ed
ci
rcul
ato
r
b
lower
m
o
to
r.
x
Fail
ed
i
n
te
g
rat
ed
co
ntro
l m
o
du
le
.
x
Tighte
n
or c
o
rrec
t wiring
co
nne
ct
ion.
x
Ch
eck
ci
rcu
lato
r blower
m
o
to
r.
Replace if
nece
ssa
ry
.
x
Ch
eck
int
eg
rated
cont
rol
m
o
d
u
le
.
Replace if
nece
ssa
ry
.
x
T
u
rn
pow
er O
FF pr
io
r to
repa
ir
x
Replace c
irc
ulator m
o
tor
with cor
rec
t re
pla
cem
ent
par
t.
x
Replace inte
gra
te
d
contr
o
l
m
odule w
ith
cor
rec
t
replacem
ent part.
x
Ai
r h
and
le
r fail
s
to
op
erat
e.
x
Int
egr
ate
d
c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
i
ndi
cat
ed
erro
r
co
d
e.
x
Com
fortNet
therm
o
stat “
C
all for Se
rvice”
ico
n
il
lum
ina
te
d.
x
Com
fortNet
therm
o
stat sc
ro
ll
s “
C
heck A
ir
H
and
ler” m
essa
ge.
6 Fla
she
s
x
Circ
ul
at
or bl
ow
er
m
o
tor
hor
se
pow
er
i
n
s
h
are
d
d
ata s
et
do
es
not
m
at
ch
circ
ul
at
or bl
ow
er
m
o
tor
hor
se pow
er
.
MOTOR
MIS
MATCH
b2
x
Inc
o
rrec
t c
irc
ulator blower m
o
tor
in
ai
r
h
andl
er.
x
Inc
o
rrec
t
sh
ar
ed da
ta set in
in
te
gra
te
d co
n
tro
l m
odu
le.
x
Verify
circula
tor
blower
m
o
tor
hor
se
pow
er
i
s t
h
e s
am
e
spe
cif
ie
d f
o
r the s
p
ec
ific air
ha
ndler m
odel. Re
place is
nece
ss
ary
.
x
Verify
share
d
data
se
t is c
o
rrec
t
for the
specific m
ode
l. Re-
po
p
u
la
te
da
ta u
sin
g c
o
rrec
t
m
em
o
ry
card if re
quired.
x
T
u
rn
pow
er O
FF pr
io
r to
repa
ir
x
Replace m
o
tor w
ith c
o
rrec
t
replacem
ent part.
x
Use m
em
o
ry
card for
the
spe
cif
ic m
odel
x
Insert m
em
o
ry
card
BEFORE t
u
rn
ing
power
O
N
. Mem
ory
card
m
ay
be
rem
oved af
ter
dat
a i
s
lo
ad
ed
.
x
T
u
rn
pow
er
O
FF bef
ore
re
mo
v
in
g
me
mo
ry
c
ar
d
.
x
Error c
ode w
ill be cle
ared
once share
d
data and
m
o
tor horse
power m
atc
h.
x
Air ha
ndle
r opera
te
s
at re
duced
perf
o
rm
ance.
x
A
irfl
ow
de
li
ve
red is l
ess t
h
an
ex
pec
te
d.
x
Int
egr
ate
d
c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
b
3
err
o
r code.
6 Fla
she
s
x
Circ
ul
at
or bl
ow
er
m
o
tor
is op
era
ti
ng i
n
a
p
o
w
er,
tem
perature, or
spee
d
li
m
it
ing
cond
it
ion
.
MOTOR
LIMITS
b3
x
Bl
ocked
fi
lt
ers
.
x
Restrictive duc
twor
k.
x
Un
d
ersi
ze
d
du
ct
wo
rk.
x
High am
bient tem
per
atures.
x
Chec
k f
il
ter
s for
b
loc
ka
ge.
Clea
n fi
lt
er
s or rem
ove
ob
st
ru
ct
io
n.
x
Chec
k
d
u
ct
w
o
rk f
o
r b
loc
ka
ge.
Rem
ove ob
st
ru
ct
io
n.
V
erify
all
regis
ter
s are f
u
lly
ope
n.
x
V
erify
duc
tw
or
k i
s ap
pro
p
ri
at
el
y
siz
ed f
o
r
sy
stem
.
Resize
/re
pla
ce
ductw
o
rk if
nece
ss
ar
y
.
x
See "
In
st
al
la
ti
on
In
st
ru
ctio
ns
" fo
r
in
st
all
at
ion
requi
rem
en
ts
.
x
T
u
rn
pow
er O
FF pr
io
r to
repa
ir.
x
Ai
r h
and
le
r fail
s
to
op
erat
e.
x
Int
egr
ate
d
c
o
ntr
o
l m
o
du
le L
E
D
di
sp
lay
p
rovi
des
i
ndi
cat
ed
erro
r
co
d
e.
x
Com
fortNet
therm
o
stat “
C
all for Se
rvice”
ico
n
il
lum
ina
te
d.
x
Com
fortNet
therm
o
stat sc
ro
ll
s “
C
heck A
ir
H
and
ler” m
essa
ge.
6 Fla
she
s
x
Circ
ul
at
or bl
ow
er
m
o
tor
se
ns
es
a los
s ro
to
r
contr
o
l.
x
Circ
ul
at
or bl
ow
er
m
o
tor
se
ns
es
hig
h
cu
rrent
.
MOTOR
TRIPS
b4
x
A
b
n
o
rm
al m
o
tor
loa
d
in
g,
s
u
dde
n
ch
an
ge in
sp
eed
or torq
ue, su
dd
en
bl
oc
ka
ge o
f air
ha
nd
le
r/c
oi
l a
ir
in
le
t or
ou
tl
et.
x
Hi
gh
lo
ad
ing
cond
it
io
ns
, blo
cked
filter
s, ve
ry
restrictive ductw
ork,
bl
oc
ka
ge o
f air
ha
nd
le
r/c
oi
l a
ir
in
le
t or
ou
tl
et.
x
Chec
k f
ilter
s, filte
r
gri
ll
s/
re
gi
st
er
s,
d
u
ct
sy
stem
, and
ai
r handl
er/
coil
ai
r
in
let
/ou
tl
et
for
bl
oc
ka
ge
s.
x
T
u
rn
pow
er O
FF pr
io
r to
repa
ir.
PCBJA101- PCBJA102 AIR HANDLER DIAGNOSTIC CODES
