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8-2. Troubleshooting method
The remote controllers (main remote controller and central control remote controller) and the interface P.C.
board of an outdoor unit are provided with an LCD display (remote controller) or a 7-segment display (outdoor
interface P.C. board) to display operational status. Using this self-diagnosis feature, the trouble site / trouble
part may be identified in the event of a trouble by following the method described below.
The list below summarizes check codes detected by various devices. Analyze the check code according to
where it is displayed and work out the nature of the trouble in consultation with the list.
• When investigating a trouble on the basis of a display provided on the indoor remote controller or TCC-LINK
central control remote controller - See the “TCC-LINK remote controller or main remote controller display”
section of the list.
• When investigating a trouble on the basis of a display provided on an outdoor unit - See the “Outdoor 7-
segment display” section of the list.
• When investigating a trouble on the basis of a wireless remote controller-controlled indoor unit - See the
“Indicator light block” section of the list.
Check code
Di
s
play of receivin
g
unit
Typical trouble on site
Description of check code
TCC-LINK
centr
a
l control
or m
a
in remote
controller
di
s
pl
a
y
Outdoor 7-
s
e
g
ment di
s
play
Indicator li
g
ht block
S
ub-code
Fl
as
h
E03
Indoor-remote controller periodic
comm
u
nic
a
tion check code
Comm
u
nic
a
tion from remote controller or network
a
d
a
ptor
h
as
b
een lo
s
t (
s
o h
as
centr
a
l control comm
u
nic
a
tion).
E04
Indoor-o
u
tdoor periodic
comm
u
nic
a
tion check code
S
ign
a
l
s
a
re not
b
eing received from o
u
tdoor
u
nit.
E0
8
E0
8
D
u
plic
a
ted indoor
a
ddre
ss
D
u
plic
a
ted indoor
a
ddre
ss
Indoor
u
nit detect
s
a
ddre
ss
identic
a
l to it
s
own.
E1
8
Check cod in periodic
comm
u
nic
a
tion
b
etween indoor
he
a
der
a
nd follower
u
nit
Periodic comm
u
nic
a
tion
b
etween indoor he
a
der
a
nd
follower
u
nit
s
c
a
nnot
b
e m
a
int
a
ined.
F01
ALT
Indoor he
a
t exch
a
nger
temper
a
t
u
re
s
en
s
or (TCJ) check
code
He
a
t exch
a
nger temper
a
t
u
re
s
en
s
or (TCJ) h
as
b
een open
/
s
hortcirc
u
ited.
F02
ALT
Indoor he
a
t exch
a
nger
temper
a
t
u
re
s
en
s
or (TC2)
check code
He
a
t exch
a
nger temper
a
t
u
re
s
en
s
or (TC2) h
as
b
een open
/
s
hortcirc
u
ited.
F03
ALT
Indoor he
a
t exch
a
nger
temper
a
t
u
re
s
en
s
or (TC1)
check code
He
a
t exch
a
nger temper
a
t
u
re
s
en
s
or (TC1) h
as
b
een open
/
s
hortcirc
u
ited.
F10
ALT
Am
b
ient temper
a
t
u
re
Am
b
ient temper
a
t
u
re
s
en
s
or (TA) h
as
b
een open /
s
hortcirc
u
ited.
s
en
s
or (TA)
check code
F11
ALT
Di
s
ch
a
rge temper
a
t
u
re
s
en
s
or
(TF) check code
Di
s
ch
a
rge temper
a
t
u
re
s
en
s
or (TF) h
as
b
een open /
s
hortcirc
u
ited.
F2
9
S
IM
Indoor EEPROM i
s
ab
norm
a
l (
s
ome other tro
ub
le m
a
y
b
e
detected).
L03
S
IM
D
u
plic
a
ted indoor gro
u
p he
a
der
u
nit
There i
s
more th
a
n one he
a
der
u
nit in gro
u
p.
L07
S
IM
Connection of gro
u
p control c
ab
le
to
s
t
a
nd-
a
lone indoor
u
nit
There i
s
a
t le
as
t one
s
t
a
nd-
a
lone indoor
u
nit to which gro
u
p
control c
ab
le i
s
connected.
L0
8
L0
8
S
IM
Indoor gro
u
p
a
ddre
ss
not
s
et
Addre
ss
s
etting h
as
not
b
een performed for one or more
indoor
u
nit
s
(
a
l
s
o detected
a
t o
u
tdoor
u
nit end).
L0
9
S
IM Indoor c
a
p
a
city not
s
et
C
a
p
a
city
s
etting h
as
not
b
een performed for indoor
u
nit.
L20
S
IM
S
IM
D
u
plic
a
ted centr
a
l control
a
ddre
ss
There i
s
d
u
plic
a
tion in centr
a
l control
a
ddre
ss
s
etting.
L30
L30
Detected indoor
u
nit No.
Indoor extern
a
l check code
inp
u
t (interlock)
Unit
s
h
u
tdown h
as
b
een c
aus
ed
b
y extern
a
l check code
inp
u
t (CN
8
0).
P01
ALT
Indoor AC f
a
n check code
Indoor AC f
a
n check code i
s
detected (
a
ctiv
a
tion of f
a
n
motor therm
a
l rel
a
y).
P10
P10
Detected indoor
u
nit No.
ALT
Indoor overflow check code
Flo
a
t
s
witch h
as
b
een
a
ctiv
a
ted.
•
P12
ALT
Indoor DC f
a
n check code (e.g. overc
u
rrent or lock-
u
p)
i
s
detected.
P31
ALT
Other indoor
u
nit check code
Follower
u
nit c
a
nnot
b
e oper
a
ted d
u
e to he
a
der
u
nit
a
l
a
rm
(E03 /L03 / L07 / L0
8
).
IPDU: Intelligent Power Drive Unit (Inverter P.C.
b
o
a
rd)
: Goe
s
off
: Lighting, : Fl
as
hing,
ALT.: Fl
as
hing i
s
a
ltern
a
tely when there
a
re two fl
as
hing LED
S
IM:
S
im
u
lt
a
neo
us
fl
as
hing when there
a
re two fl
as
hing LED
Timer Re
a
dy
Oper
a
tion
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—
—
—
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—
—
—
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—
—
—
—
—
—
—
—
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—
Indoor DC f
a
n check code
Li
s
t of check code
s
(indoor unit)
(Check code detected
b
y indoor
u
nit)
Comm
u
nic
a
tion check code
b
etween Applic
a
tion control kit
a
nd indoor
u
nit
Comm
u
nic
a
tion check code
b
etween Applic
a
tion control
kit
a
nd indoor
u
nit P.C.
b
o
a
rd
E11
—
—
P.C.
b
o
a
rd or other indoor
check code
F30
ALT
Occ
u
p
a
ncy
s
en
s
or tro
ub
le
Occ
u
p
a
ncy
s
en
s
or tro
ub
le h
as
b
een detected.
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