134
Ch
eck co
de
es
ua
C
e
m
an
ed
oc
kc
eh
C
IPDU communication
error
1
. Conn
ect
ion
er
ro
r of
co
mmun
ic
atio
n l
ine
betwee
n
IPDU
and I
/F P.C.
board
2
. I/F P.
C. boa
rd
err
or
3
. IPDU
P.C. b
oard error
4
. Ex
ternal noise
Is
co
mm
un
ic
ati
o
n
co
nn
ec
tor bet
w
ee
n
IPD
U
and
I/F
P.C.
bo
ard
co
nn
ec
te
d
?
No
Yes
Ye
s
No
No
Ye
s
No
Ye
s
Is
th
ere
no
di
sc
on
ne
cti
o
n on
co
mmu
ni
ca
tio
n
li
ne
be
tw
ee
n
IP
D
U
an
d I
/F
P.C. boa
rd?
Is
th
er
e
vo
ltag
e d
efle
cti
on
be
tw
ee
n
4 an
d 5
pi
n
of
C
N
60
0 o
n I/F
P
.C
. bo
ar
d?
(M
ea
su
re
men
t wi
th
te
st
er
:
D
C
0
to
5
V,
5 p
in
s GND
)
Is
th
er
e
vo
ltag
e de
fle
ct
ion
be
tw
ee
n 3 a
nd 5
p
in of
C
N
60
0 on
I/
F P.C
. bo
ar
d?
(M
ea
sur
emen
t wi
th
te
st
er
:
DC0 t
o 5
V
,
5 pi
ns
GND
)
Repla
ce de
fect
ive
IP
DU
P.C. boa
rd.
In
th
e ca
se
tha
t
do
no
t r
e
tu
rn
re
sp
on
se.
Co
rr
ec
t c
onne
cti
on o
f co
nnec
tor
.
Repl
ace commu
nicatio
n li
ne
.
I/F P.C.
boar
d e
rror
I/F P.
C. boa
rd
err
o
r
Su
b-cod
e
*
S
ee “I
nd
oo
r
un
it
te
mp
era
tur
e s
en
so
r c
ha
ra
cte
ristics”
on
“9
-7. S
e
ns
or cha
racte
ristics”.
* S
e
e “I
nd
oor u
n
it t
e
mpe
ra
ture
sen
sor ch
aracter
ist
ic
s” o
n “9
-7
. Se
nso
r
cha
ra
cteristics”.
Ch
eck code
es
ua
C
e
m
an
ed
oc
kc
eh
C
Ind
oor TCJ sensor er
ror
No
Yes
T
C
J
sen
sor
O
pen
/ Sh
or
t
Is TCJ
se
ns
or
co
nn
ec
to
r
(C
N
10
2:
R
ed
) on
in
do
or
P.C. bo
ard no
rma
lly
co
nn
ec
ted
?
No
Ye
s
Are ch
ara
cte
ris
tic
s
of T
C
J
se
ns
or r
e
si
st
an
ce
va
lu
e
no
rm
al
?
Ch
eck
in
doo
r P
.C. bo
ard.
De
fec
t
Rep
lac
e
C
orr
ec
t c
onne
cti
on o
f
co
n
nector.
Re
pla
ce T
C
J s
ens
or.
Che
ck cod
e
es
ua
C
e
ma
n
ed
oc
kc
eh
C
In
door
TC2 se
nsor
erro
r
T
C
2 s
ens
or
Op
en / S
hor
t
Is
TC2
se
nso
r co
nn
ec
to
r
(CN
101
: Bl
ac
k)
on
in
doo
r
P.C.
bo
ard
no
rma
lly
co
n
ne
ct
ed
?
No
Ye
s
No
Ye
s
Are
c
har
ac
teri
st
ic
s o
f
T
C
2 se
ns
or
r
e
si
st
an
ce
va
lu
e n
orm
al
?
Chec
k i
ndo
or P.C.
board.
Defec
t
Re
pla
ce
Correct con
ne
ct
io
n o
f
co
nn
ec
to
r.
Re
plac
e T
C
2
sen
so
r.
Fa
n
01
02
03
Comp.
Circl
e
(O):
Fau
lty IP
DU
O
O
O
O
Ɣ3DUWQXPEHUVVXFKDVFRQQHFWRUVDQGIXVHVPLJKWEHGLI
IHUHQW
GHSHQGLQJRQWKHPRGHO
In that case, please refer to the service manual of each indoor unit.
IPDU P.C. board
112
