139
Ca
use
C
heck
code
n
ame
Ch
eck co
de
Input curre
n
t de
tective
ci
rcu
it
system trouble
bo
ar
d
Wi
rin
g
o
r
con
n
ect
o
r con
n
ec
tio
n
on
IPDU P.
C. bo
ard
no
rm
al
?
No
Ye
s
Cor
rect
co
nnec
tor
c
onne
cti
on
or
w
irin
g.
Cau
se
Che
ck co
de
name
Che
ck cod
e
Co
mpressor
case
op
era
tio
n
Che
ck
IP
DU P.C.
boa
rd
1.
C
on
ne
ct
or c
on
ne
cti
o
n
2. W
iri
n
g
3.
I/F
P.C.
bo
ard
(Not
e 1
)
No
Ye
s
S
tart op
er
atio
n.
(Not
e 1)
Are
s
erv
ic
e
va
lv
es
o
f ga
s pi
pe
and
liq
u
id
p
ip
e o
f ou
td
oor
un
it
ful
ly
o
p
en
ed
?
No
Ye
s
Op
en s
er
vi
ce
va
lv
es
full
y.
Are
ou
tdo
or
P
MV
no
rma
l?
1.
Con
ne
ct
or c
on
ne
cti
o
n
2.
W
ir
in
g
3.
C
oi
l
4.
V
al
ve
b
o
dy
5.
I/F
P.C.
bo
ard
No
Ye
s
Co
nnector CN3
00
, CN
301, White
No
Ye
s
Correct SV4, SV5 valve circuits.
S
V
4
v
alv
e:
C
on
ne
ct
or
C
N
31
2,
B
lue
Does
n
ot
re
fri
gera
nt
by
pa
ss
fro
m
di
sch
a
rg
e
to
suc
tio
n
th
ro
u
gh
4-
w
ay
va
lv
e?
Yes
No
Chec
k
4-w
ay v
al
ve
.
Is
n
o
t
refr
ige
ran
t b
yp
as
se
d
from
d
is
ch
arg
e t
o
su
ct
io
n
?
Yes
Chec
k
pipi
ng.
Is
c
o
m
pr
es
so
r
n
or
m
al
?
(Not
e
2)
No
Ye
s
(Note 2) Check the
following items mai
nly.
1.
E
xi
st
en
ce
o
f ab
no
rm
al
s
ou
nd
a
nd
a
bn
or
ma
l v
ib
ra
tion
d
u
rin
g
op
er
at
io
n
or
w
hen
s
tar
ting
2.
Ab
no
rmal
over
heat
of
case
du
rin
g o
p
er
at
ion
or sto
p (
D
o
no
t t
ou
ch
)
3.
Cu
rre
nt
o
f co
mp
resso
r
d
uri
ng
op
er
at
io
n
o
r
sta
rt
in
g
(N
o
ra
pi
d
c
ur
re
nt
c
ha
ng
e
)
Re
fr
ig
eran
t amo
unt shortag
e,
cl
o
ggi
ng, p
ipe
breakage
(Aft
er
che
cking
the
re is n
o slo
ggin
g
o
r pipe
br
eakag
e,
cha
rg
e r
ef
ri
ge
ra
nt
a
g
ai
n.
)
No
Is
I/F P.
C
. board
normal
?
No
Che
ck
I/F P
.C. boa
rd
.
Ye
s
Are SV4, SV5 Valve circuits normal?
connection of SV4, SV5
2.
Leakage from SV4, SV5 circuit
1.
Incorrect installation and
SV5 valve: Connector CN314, White
1. W
iring
or co
nnec
tor conne
ct
ion trouble on A3-IPDU P.C.
2. A3
-I
PDU P
.C. bo
ard trouble
Failure
Repl
ace
thermostat
Is case thermostat circuit normal?
1. Case thermostat circuit trouble
2. I/F P
.C. bo
ar
d
trouble
3.
S
er
vi
ce
v
al
ve
c
lo
se
d
4. O
utdo
or
P
MV
cl
ogg
ing
5. SV4, SV5 valve leak, Coil misinstallation
6. 4-way va
lv
e trouble
7. Com
pr
e
ss
or
trouble
8. Refr
iger
ant a
moun
t sh
ortage
Repair case thermostat circuit.
1. Case thermostat is usually closed.
2. Operation temperature of case thermostat is 120 °C.
Repair case thermostat circuit.
Comp
res
so
r failure
129
A10-1510.indb 129
A10-1510.indb 129
2016/04/08 17:21:14
2016/04/08 17:21:14
AMP Air Conditioning
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