140
es
ua
C
e
m
an
ed
oc
kc
eh
C
ed
oc
kc
eh
C
Du
pl
icat
ed indo
or out
doo
r
un
its
T
he
re
a
re
tw
o or
mo
re
ind
oor
outd
oor
uni
ts
in
a
gr
ou
p
d
uring
group cont
ro
l
1) Ch
ec
k
wh
e
th
e
r th
e
c
o
nn
e
cti
on
o
n
r
em
ot
e c
o
nt
ro
lle
rs
(g
ro
up
an
d /
or
in
d
iv
id
ua
l) h
as
be
e
n c
h
an
ge
d s
in
ce
th
e g
rou
p
co
nf
ig
u
rat
io
n
a
nd
add
ress ch
eckin
g
o
n t
h
e re
mo
te
con
tro
ller
s fi
nish
ed
.
2) I
f t
he
g
ro
up
co
nf
ig
ur
at
io
n an
d ad
d
ress ar
e no
rma
l w
he
n po
we
r h
as be
e
n
tu
rn
ed
o
n,
th
e mo
de
a
ut
o
ma
tically
shifts
to
add
ress se
tup
mod
e
. Fo
r sett
in
g u
p
add
resses
ag
ain,
re
fer t
o
"Ad
dress
se
tup
".
es
ua
C
e
m
an
ed
oc
kc
eh
C
ed
oc
kc
eh
C
Duplicat
ed
set
u
p of
ou
td
oor lin
e
add
ress
O
utdo
or
li
ne ad
dr
ess
es
ar
e du
pli
ca
ted
Cor
rect th
e wire
co
n
nect
io
n.
Ye
s
Ye
s
No
No
Cor
rec
t th
e li
ne a
ddres
s
setu
p.
Re-se
t up t
he ad
dress
.
(R
efer to "
A
d
dres
s setup
".)
Is
th
ere
dup
lic
at
ed
li
ne
ad
dr
e
ss s
et
u
p?
Are
co
mm
un
ic
at
io
n
wi
re c
onn
ec
tio
n
s
o
f
[U1.
U2], [U3.U
4
]
no
rm
al
?
Chec
k o
utdoo
r
I/F P.C.
board.
F
a
ilur
e
Rep
lac
e
es
ua
C
e
m
an
ed
oc
kc
eh
C
ed
oc
kc
eh
C
Du
p
lic
at
ed
in
do
or
un
its
w
ith
pr
iority
(D
is
pl
ay
ed
o
n
in
d
oo
r u
n
it
w
ith
priority)
T
w
o or mo
re
prior i
ndoo
r u
nits
ex
is
t
Th
is ch
eck co
de
is displa
yed
on t
h
e in
do
or un
it set
as a
prior on
e whe
n
two
or more p
rio
r in
do
or un
its are d
e
te
cte
d
.
• P
ri
ority
setu
p with
two
or more
units
is
no
t ava
ilabl
e.
As
only
one
ind
oo
r u
n
it
w
ith
priority
is v
a
lid, ch
an
ge
the
setu
p.
Lo
w
-pr
e
ss
ur
e
p
rot
ec
tiv
e
o
p
e
ra
tio
n
1.
Ser
vic
e v
alv
e c
lo
se
2.
Ps
se
nso
r
err
or
3.
SV2, SV4 circuit error
4.
M
is
w
ir
in
g o
f c
ommu
nic
ati
on be
tween i
ndoo
r an
d outd
oor
5.
Indoo
r
/ outd
oor
fan
and c
on
denser error
6.
Indoo
r
/ outd
oor PM
V cl
o
ggin
g
7.
Indoo
r
/ outd
oor hea
t exch
anger cl
o
gging
8.
R
ef
rig
er
an
t sh
or
ta
ge
es
ua
C
e
m
an
ed
oc
kc
eh
C
ed
oc
kc
eh
C
A
re se
rv
ic
e
va
lv
es
of
g
as
a
nd l
iqui
d
pi
pe
of
o
ut
doo
r uni
t fu
lly
ope
ned
?
Are
ch
a
rac
te
ri
st
ic
s o
f
lo
w-
pr
es
su
re
se
n
so
r
no
rm
al
?
Are SV2 and SV4
ci
rc
ui
ts
n
orm
al
?
Is an
y
in
do
or
un
it
in
a d
iff
er
e
nt
li
n
e
co
nn
ec
te
d?
In
co
oli
ng s
eas
on
, go t
o
(A)
In he
atin
g s
eas
on, g
o to
(B
)
*
1. P
re
ss
ur
e by
pr
es
su
re
gaug
e (
C
hec
k j
oi
nt)
2. P
re
ss
ure di
sp
lay
on
7-
se
g
m
ent
dis
pl
ay
3. O
utpu
t v
olta
ge of
I/F P.C.
board
If 1 a
nd 2,
3 are d
iffe
ren
t, an
err
o
r
o
f press
ure
se
ns
or
e
rr
or
is
co
ns
id
er
ed
.
If 2
a
nd
3
ar
e di
ffer
ent,
che
ck
I/F
P
.C.
boa
rd
.
Ch
ec
k m
is
w
iring
, mi
si
ns
tall
ati
on a
nd c
onne
cto
r c
onn
ec
tion
.
(C
he
ck
wit
h mi
swi
rin
g
che
ck
func
tion of
outd
oor uni
t.)
No
No
No
Yes
Op
en s
er
vi
ce
va
lv
es
fu
lly.
Ex
ch
ange
low-
pr
es
su
re
se
nso
r.
Correct SV2 and SV4
circuits
Corr
e
ct w
iring
.
No
Ye
s
Ye
s
Ye
s
Repa
ir faul
ty
parts.
Repa
ir faulty
parts.
Repl
ac
e PM
V bo
dy
.
Repl
ac
e PM
V bo
dy
.
(A
) Coo
ling
D
o
es
in
do
or
fa
n no
rm
al
ly
op
er
at
e
in
co
ol
in
g
se
aso
n
?
Is
th
ere
cl
og
gi
ng
of
in
d
oo
r ai
r
filt
e
r
or h
e
at
ex
ch
an
ge
r?
Is
in
doo
r PM
V
no
rm
al?
Re
fri
geran
t s
hort
age or
cloggi
ng or
pipe
de
fo
rm
ed
Ar
e
fo
llo
w
in
g it
em
s
co
nc
er
ne
d t
o
in
do
or
fa
n
m
ot
or n
orm
al
?
1.
Con
ne
ct
or
c
onn
ec
tion
2.
Co
nd
en
se
r
3.
M
oto
r
4. F
an
Ye
s
No
No
Is
c
onn
ec
to
r
co
nn
ec
tio
n or
c
oi
l
no
rmal
?
Is
th
er
e
cl
og
gi
n
g
on
w
ho
le
va
lv
e?
Is
in
do
or fa
n
sy
st
em
no
rm
al?
• F
a
n
cra
ck
• Fan
c
o
m
in
g
-o
ff
Che
ck
outdo
or
I/
F
P
.C. boa
rd
.
Fail
ur
e
Repl
ace
No
No
Ye
s
Ye
s
No
No
Ref
rigerant sho
rta
ge,
cl
og
gin
g, pipe d
eformed
Cl
ean
ing
Clean
ing
(B
) Heating
Check
ind
oor P.
C. boa
rd.
F
ail
ur
e
Re
pl
ac
e
Is
o
utd
oor
fan
nor
mal
ly
op
er
at
ed i
n hea
tin
g
se
as
on
?
Is
th
ere
cl
og
gi
ng
of
ou
td
o
or
h
ea
t
ex
ch
an
ge
r?
Is
out
do
or
P
M
V
no
rm
al?
Ye
s
No
No
Ye
s
No
Ye
s
Ye
s
Ye
s
No
Ye
s
118
