80
Ca
us
e
1.
The
h
igh-
p
re
ssur
e Pd
se
nso
r a
n
d low-
pr
essu
re
Ps sen
sor
ar
e re
pl
ac
ed
2
.
Th
e o
u
tp
ut
volt
a
g
e
of
bo
th
se
nso
rs is 0
Ca
us
e
TOA
sen
sor o
pen
-ci
rcu
it
/ sh
ort-cir
cu
it
T
h
e
T
O
A se
nso
r
ope
n-circuit /
sho
rt-circuit wa
s de
tect
ed
. Che
ck th
e d
isco
nn
ectio
n o
f th
e co
nn
ecto
r con
ne
ction
ci
rcu
it
(T
OA
s
e
nso
r:
CN1
06 White
),
o
r
se
nso
r resista
nce
va
lue ch
aracte
ri
st
ics.
(Se
e
"
9
-9. Se
nso
r ch
aracte
ri
st
ic
s
/ Ou
td
oor un
it
tempe
ra
tu
re
sen
sor ch
aracte
ri
st
ic
s
")
If th
e se
nso
r is wor
king
pr
op
er
ly, r
e
p
la
c
e
the
ou
tdo
or
I/
F
bo
ar
d:
Ca
us
e
TRA se
nso
r
op
en
-c
ircuit /
sho
rt-
circuit
T
h
e
T
R
A
sen
sor o
p
en
-ci
rcu
it
/ sh
ort-cir
cu
it was
det
ecte
d.
C
h
eck t
h
e
discon
ne
ction
of
the
con
ne
ctor co
nn
ectio
n
circuit
(TRA se
nso
r: CN105
Brown
),
or sen
sor
resista
nce
valu
e ch
aracte
ri
st
ics.
(
S
ee
"9
-9
. Se
nso
r cha
ra
cteristics / O
u
td
oo
r u
n
it
tempe
ra
tu
re
sen
sor ch
aracte
ri
st
ic
s
")
If th
e se
nso
r is wor
king
pr
op
er
ly, r
e
p
la
c
e
the
ou
tdo
or
I/
F
bo
ar
d:
Che
ck cod
e n
a
me
Miswiring
of
out
door
p
ressure
sensor
(Pd
, Ps)
Che
ck cod
e n
a
me
In
door
TOA
sen
so
r e
rror
Che
ck cod
e n
a
me
In
door
TRA sensor err
or
Ch
eck co
de
[F
16]
Ch
eck co
de
[F
17]
Ch
eck co
de
[F
18]
Ar
e t
he
Pd
and P
s
sen
so
r
c
onn
ecto
rs
c
onne
cte
d
pr
oper
ly
?
No
Ye
s
Chec
k t
he ou
tdoor
I/
F
b
oar
d
Er
ro
r
ĺ
Repl
ac
e
No
Ye
s
No
Ye
s
Ar
e
Pd
and P
s
sen
so
r
outp
ut v
o
lt
age
c
har
ac
ter
is
ti
cs
co
rr
ec
t?
Whi
le
the
c
o
m
p
re
ss
or
is
r
unn
ing,
is
Pd
hig
her tha
n Ps
?
Cor
re
ct the
c
onn
ect
or
con
nec
tio
n
Pd
se
nso
r:
C
N
501 Re
d
Ps
s
ens
or
: CN500
Wh
ite
S
e
n
s
or
er
ro
r
ĺ
Re
pla
c
e
*
Y
o
u
c
an c
hec
k
it by
th
e 7-
se
gmen
t di
spl
ay
fun
cti
on o
n
the
outdo
or
I/F boa
rd
.
P
d
[SW
01 /
02 /
03] =
[1 /
1 / 2
]
P
s
[SW
01 /
02 /
03] =
[1 /
2 / 2
]
Chec
k
the c
o
mp
re
ss
or
(1
)
P
re
s
s
u
re
by
pr
ess
ur
e ga
uge
(Ch
e
ck
jo
int
)
(2
)
P
re
s
s
u
re
dis
pl
ay
in 7
-s
egm
ent
(3
)
O
u
tput
vol
tage
of th
e I/F
bo
ar
d
If (1) i
s
different
fr
o
m
(2) and
(
3
),
an error may ha
v
e
oc
cur
red o
n
the
pr
ess
ur
e s
ens
or
.
If (
2
) and
(
3
) a
re
dif
fer
ent, c
h
e
c
k
the
inte
rf
a
c
e
boar
d.
Ca
use
TD3
sen
sor o
p
e
n
-cir
cu
it / sh
ort-circuit
The
TD3 se
nso
r
ope
n-circuit /
sho
rt
-circuit
w
a
s de
te
cted
. Ch
e
ck th
e d
isconn
ect
io
n o
f th
e
conn
ect
or con
ne
ction
circu
it
(T
D3
se
nsor
:
CN5
0
4
Blue
),
or
se
nso
r
re
sis
tan
ce va
lue
char
a
c
ter
istics. (
S
e
e
"
9
-9
. Se
nso
r
char
a
c
ter
istics /
Outd
oo
r
unit
te
m
p
erat
ure se
nso
r
cha
ra
cteristics")
If
the
sen
sor
is wor
king
p
ro
p
e
rly,
re
place
th
e o
u
td
oo
r
I/F b
oar
d
.
Ca
use
O
u
tp
ut vol
ta
ge er
ro
r
of the
Ps senso
r
Ca
use
O
u
tp
ut vol
ta
ge er
ro
r
of the
Pd
sen
sor
Ou
tpu
t vo
lt
age
e
rr
o
r o
f th
e P
d
se
nso
r was d
e
te
cted
. Ch
eck th
e d
iscon
nec
tion
of t
h
e
con
nec
tor
co
nne
ction
cir
c
uit (
P
d
sen
sor
: C
N
5
01
Re
d)
, o
r sen
sor
o
u
tp
ut vo
lt
ag
e.
If
the
sen
sor
is wor
king
p
ro
p
e
rly,
re
place
th
e o
u
td
oo
r
I/F b
oar
d
.
Ch
eck co
de
na
me
TD3 sensor err
or
Ch
eck co
de
na
me
P
s
sensor err
or
Ch
eck co
de
na
me
Pd
se
ns
or
e
rr
o
r
Che
ck cod
e
[F
22
]
Che
ck cod
e
[F
23
]
Che
ck cod
e
[F
24
]
Is t
he P
s
s
ens
or
co
nnec
tor
c
onne
cted
co
rre
ct
ly
?
No
Ye
s
Re
pla
ce t
he S
V
4 v
a
lv
e
No
Ye
s
No
Ye
s
Ar
e
Ps
se
nso
r
outpu
t
vo
lt
a
g
e
c
h
ar
ac
te
ri
s
tic
s
c
o
rre
ct?
Leak
age
on S
V
4
val
ve
?
Co
rr
ec
t th
e co
nnec
tor
c
onne
cti
on
S
ens
or
er
ro
r
ĺ
Repl
ac
e
Ch
ec
k th
e c
ompr
es
so
r
Conne
cto
r:
C
N
500 W
h
it
e
(1
)
P
re
ss
ur
e by
pr
es
su
re
gau
ge (
C
hec
k
joi
nt)
(2
)
P
re
ss
ur
e di
s
p
lay
i
n
7-
se
gmen
t
(3
)
O
utp
ut v
o
lt
age o
f the
I/F
boar
d
If
(
1
) i
s
diff
er
ent fr
om
(
2
) a
nd (
3
),
an
er
ro
r m
a
y
hav
e
o
c
c
u
rr
e
d
on
the p
res
s
u
re
s
ens
or
.
If
(
2
) a
nd (
3
) ar
e d
iffe
re
n
t, c
hec
k t
he i
n
ter
fac
e
bo
ar
d.
Che
ck
the
four
-w
ay v
a
lv
e
Doe
s th
e
re
fr
ig
er
ant r
un
fr
o
m
the
4-
way
v
a
lv
e di
s
c
ha
rg
e
to
su
cti
on?
No
Yes
Summary of Contents for MD-VNK802HEXE
Page 120: ...118 11Owner s Manual Excerpt ...
Page 137: ...135 12Installation Manual Excerpt ...
