Service manual

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Status of
indoor/outdoor
units
Indication by
LED1 on
outdoor unit
*2
Indication on indo
or unit
Content of diagno
sis
Inspection location
/method
Remedy
Floor / ceiling
Wall
(Panel)
Wall(Grill)
Lighting pattern a
t the time of timer lamp lighting
Main
Sub
Main
for 5 seconds
Main category
Sub category
Indoor/outdoor
units
i
n
operation
Normal
fl
as
hi
ng
Normal
_
_
_
_
_
_
In
door/outdoor
uni
ts
i
ncomplete
s
h
utdown
1time
Ope
r
a
ti
o
n
l
amp(RE
D)
C
l
us
ter
l
amp(BLUE)
O
p
eration l
amp(RE
D
)
Cluster lamp(BLUE)
Opera
ti
o
n
lam
p(RE
D)
Clu
s
ter la
mp(BLUE)
O
p
eration lamp
(RE
D)
Cluster lamp
(BLUE)
O
p
eration lamp
(
R
E
D)
Cluster lamp
(
B
LUE)
Operation lamp
(RE
D)
Cluster lamp
(BLUE)
Ope
r
a
ti
o
n
l
amp(RE
D)
Cl
us
ter
l
amp(BLUE)
O
p
eration lamp(RED)
Cluster lamp(BLUE)
O
p
eration l
amp(RE
D
)
Clus
t
er lamp(BLUE)
Ope
r
a
ti
o
n
l
amp(RE
D)
C
l
us
ter
l
amp(BLUE)
Ope
r
a
ti
o
n
l
amp(RE
D)
Cl
us
ter
lamp(BLUE)
Operatio
n
lamp
(RED)
Cluster lam
p(BLUE)
Operation lamp
(RE
D)
C
l
us
ter
l
amp(BLUE
)
Operation
lam
p(
R
E
D)
Cluster
l
a
mp(
B
LU
E
)
O
peration
lam
p(
RE
D)
Cluster
l
am
p(
B
LU
E
)
Operation l
amp(RED)
Cluster l
amp(
B
LU
E
)
Operation
lam
p(
R
E
D)
Cluster
l
a
mp(
B
LU
E
)
Operation
lam
p(
R
ED)
Cluster
l
a
mp(
B
LU
E
)
Operation
l
a
mp(RED)
Clus
te
r
l
amp(
B
LU
E
)
O
peration
lam
p(
RE
D)
Cluster
l
am
p(
B
LU
E
)
Operation
lam
p(
R
E
D)
Cluster
l
am
p(
B
LU
E
)
Operation lamp(RED
)
Clu
s
ter
l
amp(
B
L
U
E
)
O
utdo
or
un
it
thermi
s
tor
s
hort-ci
r
c
uit
(
1
)
M
eas
ure res
is
tance
o
f the outdoor
u
ni
tthermis
tors.
(TH2
~
4
,6~
9
: Approx.4.4 k at 25
͠
)
(2)Checkthel
ead wi
re of t
he outdoor unitthe
rmistor for torn she
ath a
nd shor
t
-
c
irc
ui
t.
(3)No ab
nor
m
ality
fou
nd in abov
einspec
ti
on
s
(1)and (
2).
(1)Replaceth
eout
door uni
t
ther
m
i
s
to
r
ass
e
mbl
y
.
(2)Replaceth
eout
door uni
t
ther
m
is
to
r
ass
e
mbl
y
.
(
3)Repla
c
e
the out
door unitc
ontrol
PCB ass
emb
ly.
Indoor/outdoor
uni
ts i
n
c
om
pl
ete
s
hu
tdown
2time
Cy
c
l
e
temperature
(1)
Check the outd
o
o
r
unitair
out
l
et for bl
ock
age.
(2)Che
c
k
i
fth
e power s
up
ply
v
oltageis90V
or hi
gher
a
tful
l
power
.
(3)
Che
c
kthepi
pe c
onnec
ti
ons for r
efrig
er
an
tl
eak
s
.
(4)M
eas
ure
r
esi
s
tanc
e
of the outdoor
u
ni
tcompr
es
s
or ther
m
i
s
tor
.
(TH1:Ap
pr
ox.53 k at 25
C)
(5)
Check
the expansi
on v
alv
e
for
p
roper oper
at
i
on.
(
1)En
s
ure unobstruct
ed a
i
r flow from the outdo
or uni
t
air outl
e
t.
(
2)Connectpowe
r
s
upply
of proper
v
oltage.
(
3
)
Charge the speci
fi
ed amount of r
e
f
ri
ger
a
nt.
(
4
)
Replace the out
door unitc
o
mpr
e
s
s
or
th
e
rmis
tor as
s
embl
y
.
(5)
Replacetheexp
ansi
on
v
alvecoil,expa
ns
i
on valveor
o
utdoor
un
i
tcontrol
PCB
as
s
embly
.
Indoor unitin
operati
on
O
utd
oor uni
tin
temporary
s
top
(Tem
porar
ysto
pforc
y
c
le protection)
(Temporary s
top for c
y
c
l
e
pr
ot
ec
ti
on)
(
Temp
or
ary s
top for cy
c
l
e protec
ti
on)
Temporary s
to
p due to
I
PM overheat *3
(
Tem
porar
y
s
top fo
r
pa
rts
pr
o
tec
ti
on)
IPM hi
gh tem
peratur
e
er
ror
(1)
M
eas
ure res
i
s
tan
c
e
of the heat-s
i
nk thermi
s
to
r.(CN8B)
(
1)Change th
ehea
t-si
nk
thermi
s
tor.
Ind
oor
/o
utdoor
un
i
ts i
n
c
omplete
s
hutdown
5time
O
utdoor unit
ther
m
i
s
tor
o
pen-
c
i
rc
uit
(
1)Chec
k
c
onnector C
N8A
and CN8C of the out
door unit thermistor for
s
ecure
i
nstallati
on.
(
2
)
M
eas
ure resi
s
tance
of
outdoor thermis
tors TH1~4,6~9.
(3)Check
the leadw
i
r
e
s
of the
rmis
tor
s
TH
1
~
4
,6~9 on
the outdoor unit
c
ontrol
PCB for open
-
c
i
rcui
t.
(4)No abn
or
ma
l
i
ty
found
i
n aboveinspec
ti
ons (1)
th
r
ough
(3).
(
1)Correctthe
i
ns
ta
lla
ti
on.
(
2)Repl
ac
e
the out
door unitthermi
s
tor as
s
embl
y
.
(
3
)
Replac
e
the out
door unitthermistor as
s
embl
y
.
(
4
)
Replacetheout
door unitc
on
tr
ol PCB as
s
e
mbly.
Indo
or/outdoor
unitsin
c
o
mplete
s
h
utdown
6 time
Outdoor uni
t
DC
C
urrent
DC ov
ercurrent error
(1)IPM c
ontinuity
c
heck
(2)ChecktheIPMand
h
eat s
i
nk
for se
c
ur
eins
talla
tion.
(3)Check the outdo
or u
ni
t fan motor
for
prop
er r
otat
i
on.
(4)No abn
ormal
i
ty
fou
nd in abov
ei
nspec
ti
ons (
1)th
rough (
3).
(5)
No ab
normal
i
ty
fo
und i
nabo
v
e
inspec
ti
ons (1)t
hrough (
4).
(
1)
Repl
acethe
out
door unit IPM PC
B
as
s
embly
.
(2)
Correctthe
i
nstal
la
ti
on (tig
hte
nthesc
re
w
s
).
Apply
sil
i
con grease
.
(3)Repl
acet
he outdoor un
i
t fan motor.
(4)
Replace
the out
door un
i
tIPMPC
B
a
s
s
embly
.
(5)
Replace
the c
omp
ress
o
r.
Indo
or/outdoor
un
i
ts in
complete
s
h
utdown
7ti
me
O
utdoor u
nit
AC Cur
re
nt
AC overcu
r
rent er
ro
r
(1)
Ensu
r
e
unobstruct
e
d air flow from the outdo
or un
it air outl
et.
(2)Check the outdo
or
unit fan moto
r.
(1)Ensur
e
un
obs
truct
ed air fl
ow from the o
utdo
or unit air outlet.
(2)Chec
k
the
outdo
or uni
tfa
n motor.
A
Cc
urrent er
r
or w
hen
O
FF
(1)IPM c
ontinuit
y
c
hec
k
(1)Replacetheout
door
IPM PWB
AC max
i
m
um c
urrent e
r
r
o
r
(1)E
nsur
e
unobs
tr
uc
t
ed ai
rflow fr
om the outdo
o
r unit air outle
t.
(2)Che
c
ktheout
do
or unit fan motor.
(1)Ensur
e
unobs
truct
ed a
ir flow from the outdo
or uni
t
air outlet.
(2)
Chec
k
the outdo
or un
it fan motor.
AC c
urren
tdeficienc
ye
r
ror
(1)
Replace
the out
door unitcontr
ol PCB as
s
embly.
(2)Charge t
he s
pecified amoun
tofr
ef
rige
rant.
(3)
Correct
r
efrigerant c
l
o
gs
.
(Stop v
al
v
e,pipe,ex
p
an
s
i
on v
al
v
e)
(1)
Re
pl
acetheout
door uni
tcont
r
ol PCB as
s
embly.
(2)Ch
arge the s
p
ecifi
ed amoun
tofr
ef
rigerant.
(
3
)C
o
rre
ct
r
e
f
r
i
g
e
ra
n
t
cl
o
g
s.
(S
t
o
pv
a
l
v
e
,p
i
p
e
,
e
xp
a
n
sionvalv
e
)
Indoor/out
door
units in
c
omplet
e
s
hutdown
Abnorm
al
wi
r
e
c
heck
Abnormal
wi
r
eche
c
k
error
(1)Checktheex
pa
nsi
on valv
e.
(un
i
tA
-
D)
(2)A
re four expan
s
i
o
nv
al
v
es c
on
nected by
m
ista
k
e
(3)Ch
ec
k the wir
i
ng between uni
ts
.
(1)Replac
e the out
door c
o
ntrol board a
s
s
embly
.
(2)Reattac
h
(3)
Chec
k
the wi
ring b
etween un
its.
Indo
or/outdoor
units
i
n
c
o
mplete
s
h
utdown
Outdoor uni
t
DC
F
an
O
utdoor un
i
tD
Cfan
rotat
i
on err
or
(1
)
Check c
o
n
n
ec
to
r
CN3
o
f
the outdoor uni
t
DC fan
m
otor fo
rs
e
c
ure
in
stal
lation.
(2)Chec
k
th
e outdo
or unit fan motor for prop
er r
otation.
(3)
Chec
kfu
s
e FUSE5.
(4)
O
utdoo
r
unitc
ont
rol P
C
B
(1)
Cor
r
ect the ins
tal
l
a
tion.
(2)
Rep
lace the out
door uni
tfanm
otor.
(3)Re
placetheout
door uni
tcon
tr
ol PCB as
s
embly.
(4)Re
placetheo
ut
door unit con
tr
ol PCB ass
embly.
Flashes in 1-sec inte
rvals (normal) : 1sec ON / 1sec OFF
X
:
:
OFF : Flashes 3 times in 0.2-sec i
ntervals
8time
11 time
X
Heat ex
c
hanger ther
mis
to
rs
hort
c
i
r
c
ui
t
error
O
utdoor temper
atureth
ermisto
r
s
hor
t-
c
i
r
c
ui
te
r
ror
Sucti
on th
er
m
i
s
to
r
s
ho
r
t-ci
r
c
ui
te
r
ror
Thermis
tor Uni
t
A
- D thermi
s
tor short-
c
ircui
terror
Comp
r
ess
or hi
gh tem
perature er
ror
Te
mporar
y
s
t
op due
to compr
e
s
sor
dis
-
c
h
arge
o
v
e
r
h
eat *
3
Temporary sto
p
due to in
door unit
heat
exc
h
anger ov
erhea
t*3
Heat exc
hanger th
er
m
i
s
tor
open-
c
i
rcuit
error
O
ut
door temperature ther
mis
tor o
pen-
c
i
rcuiterr
or
Suc
t
i
on the
r
mis
tor ope
n
c
i
rc
ui
terror
Suction thermi
s
tor ope
nc
i
rcuiter
ror
Di
s
c
harge thermis
tor o
pen-circui
terr
or
Ther
mis
t
or Unit
A
-D
thermistor o
pen-
c
i
r
c
uiterror
Temporary s
to
p due to
o
ut door unit
Operation l
amp(RED)
Cl
uster l
amp(
B
LU
E
)
-1
I
PM
pi
nlev
e
l
er
ror
(1)
Chec
k
the IPM is
at
tac
hed
c
orreci
ty
to
the outdoor unitIPMPWB.
(
1)
Replacethe
out
door unit IPM PWB as
s
embl
y
.
Indo
or/outdoor
uni
ts
i
n
c
o
mplete
s
h
utdown
12 ti
me
Operation lamp(RED
)
Clu
s
ter
l
amp(
B
L
U
E
)
12
-0
12
T
her
mal fus
e
in ter
mi
n
al
board
Th
er
mal fus
eer
r
or
in ter
min
al
board
(
for
power s
upp
l
y
)
(1)
Check th
G

V
JGT
O
CN
H
W
U
G

K
P

V
GTO
K
P
C
ND
Q
C
T
F

H
Q
T

2
Q
Y
G
T

U
WR
R
N
[

(1)Repl
ac
e terminal
boa
rd for Power s
uppl
y
(2)
Replac
e the outdoor uni
tc
on
tr
ol PCB as
s
embly.
9ti
m
e
Operation
lam
p(
R
E
D)
Cluster
l
am
p(
B
LU
E
)
-4
4way
v
al
v
eer
ror
o
rGas leak
e
rror
(1)Check
to mak
e
s
ur
eoutdoor uni
tther
mis
to
rT
H2 (exc
ha
nge)
i
s
insta
l
l
ed in
c
or
rect
TH3 (
pipe temper
ature) poct
i
ons.
(2)
Ch
ec
kifther
efi
gerant volu
me i
s
abnomally
low.
(3)
Che
c
kthe4-wayval
v
eforp
r
oper operati
o
n.
(1)Correc
ttheins
tal
l
ati
on.
(2)Change the spec
c
i
f
ied amount o
fr
efr
igerant.
(3)Rep
l
ace the 4-
w
ay v
al
v
e.
99
Cy
c
l
e
t
emperatur
e
(2)
Chec
kco
nnector
CN5 o
f the outdoor uni
t.