– 72 –
Check code
Location
of
detection
De
s
cription
S
y
s
tem
s
tatu
s
Problem detection
condition(
s
)
Check item
s
(location
s
)
<All o
u
tdoor
u
nit
s
in
corre
s
ponding line to
b
e
checked>
• Check
ba
l
a
nce pipe
s
ervice v
a
lve to confirm f
u
ll
opening.
• Check connection
a
nd
in
s
t
a
ll
a
tion of TK1, TK2,
TK4,
a
nd TK5
s
en
s
or
s
.
• Check re
s
i
s
t
a
nce
ch
a
r
a
cteri
s
tic
s
of TK1,
TK2, TK4,
a
nd TK5
s
en
s
or
s
.
• Check for g
as
or oil le
a
k in
sa
me line.
• Check for refriger
a
nt
pro
b
lem in
s
ide
compre
ss
or c
as
ing.
• Check
S
V3A,
S
V3B,
S
V3C,
S
V3D v
a
lve
s
for
defect.
• Check oil ret
u
rn circ
u
it of
oil
s
ep
a
r
a
tor for clogging.
• Check oil eq
ua
lizing circ
u
it
for clogging.
I/F
Low oil level
protection
All
s
top
Oper
a
ting compre
ss
or
detect
s
contin
u
o
us
s
t
a
te of
low oil level for
ab
o
u
t 2 ho
u
r
s
.
H07
H07
—
Main
remote
controller
Outdoor 7-
s
e
g
ment di
s
play
Check
code
S
ub-code
• Check c
u
rrent detection
circ
u
it wiring.
• Check defect in o
u
tdoor
P.C.
b
o
a
rd (A3-IPDU).
IPDU
01:
Compre
ss
or 1
s
ide
02:
Compre
ss
or 2
s
ide
C
u
rrent
detection
circ
u
it pro
b
lem
All
s
top
C
u
rrent flow of
a
t le
as
t
s
pecified m
a
gnit
u
de i
s
detected de
s
pite inverter
compre
ss
or h
a
ving
b
een
s
h
u
t t
u
rned off.
H03
H03
• Check in
s
t
a
ll
a
tion of TD1
s
en
s
or.
• Check connection of TD1
s
en
s
or connector
a
nd wiring.
• Check re
s
i
s
t
a
nce
ch
a
r
a
cteri
s
tic
s
of TD1
s
en
s
or.
• Check for defect in o
u
tdoor
P.C.
b
o
a
rd (I/F).
I/F
TD1
s
en
s
or
mi
s
wiring
(incomplete
in
s
ertion)
All
s
top
Di
s
ch
a
rge temper
a
t
u
re of
compre
ss
or 1 (TD1) doe
s
not incre
as
e de
s
pite
compre
ss
or
b
eing in
oper
a
tion.
H05
H05
—
• Check
s
ervice v
a
lve
s
to
confirm f
u
ll opening
(
b
oth g
as
a
nd liq
u
id
s
ide
s
).
• Check o
u
tdoor PMV
s
for
clogging (PMV1, 3).
• Check for defect in
S
V2 or
S
V4 circ
u
it
s
.
• Check for defect in low-
pre
ssu
re P
s
s
en
s
or.
• Check indoor filter for
clogging.
• Check v
a
lve opening
s
t
a
t
us
of indoor PMV.
• Check refriger
a
nt piping for
clogging.
• Check oper
a
tion of o
u
tdoor
f
a
n (d
u
ring he
a
ting).
• Check for in
su
fficiency in
refriger
a
nt q
ua
ntity.
I/F
Activ
a
tion of
low-pre
ssu
re
protection
All
s
top
Low-pre
ssu
re P
s
s
en
s
or
detect
s
oper
a
ting pre
ssu
re
lower th
a
n 0.02MP
a
.
H06
H06
—
• Check for defect in
compre
ss
or.
• Check power
su
pply volt
a
ge.
(AC3
8
0-415V ± 10%).
• Check compre
ss
or
s
y
s
tem
wiring, p
a
rtic
u
l
a
rly for open
ph
as
e.
• Check connection of
connector
s
/termin
a
l
s
on
A3-IPDU P.C.
b
o
a
rd.
• Check cond
u
ctivity of c
as
e
he
a
ter.
(Check for refriger
a
nt
pro
b
lem in
s
ide
compre
ss
or.)
• Check for defect in o
u
tdoor
P.C.
b
o
a
rd (A3-IPDU).
• Check o
u
tdoor MG-CTT.
IPDU
01:
Compre
ss
or 1
s
ide
02:
Compre
ss
or 2
s
ide
Compre
ss
or
pro
b
lem
(lock
u
p)
MG-CTT
pro
b
lem
All
s
top
Overc
u
rrent i
s
detected
s
ever
a
l
s
econd
s
a
fter
s
t
a
rt
u
p of inverter
compre
ss
or.
*1 Tot
a
l
s
h
u
tdown in c
as
e of he
a
der
u
nit
Contin
u
ed oper
a
tion in c
as
e of follower
u
nit
MG-CTT: M
a
gnet cont
a
ctor
H02
H02
