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6-2. Troubleshooting
6-2-1. Outline of judgment
The primary judgment to check whether a trouble occurred in the indoor unit or outdoor unit is carried out with
the following method.
Method to judge the troubled position by flashing indication on the display part of the indoor unit
(sensors of the receiving part)
The indoor unit monitors the operating status of the air conditioner, and the blocked contents of self-diagnosis
are displayed restricted to the following cases if a protective circuit works.
∗
1: These are representative examples and the check code differs according to the outdoor unit to be combined.
: Go off,
: Go on,
: Fl
as
h (0.5
s
ec.)
Lamp indication
Oper
a
tion Timer
Re
a
dy
No indic
a
tion
a
t
a
ll
Oper
a
tion Timer
Re
a
dy
Fl
as
h
Oper
a
tion Timer
Re
a
dy
Fl
as
h
Oper
a
tion Timer
Re
a
dy
Altern
a
te fl
as
h
Oper
a
tion Timer
Re
a
dy
Altern
a
te fl
as
h
Check code
—
E01
E03
E08
E09
E11
E18
E04
P10
P12
P03
P04
P05
P07
P15
P19
P20
P22
P26
P29
P31
Cau
s
e of trouble occurrence
Power
su
pply OFF or mi
s
wiring
b
etween receiving
u
nit
a
nd indoor
u
nit
Receiving
u
nit tro
ub
le
Mi
s
wiring or wire connection tro
ub
le
Comm
u
nic
a
tion
s
top
b
etween receiving
u
nit
a
nd indoor
u
nit
D
u
plic
a
ted indoor
u
nit No.
S
et
u
p tro
ub
le
D
u
plic
a
ted he
a
der
u
nit
s
of remote controller
Comm
u
nic
a
tion tro
ub
le
b
etween Applic
a
tion control kit
a
nd indoor
u
nit P.C.
b
o
a
rd
Wire connection tro
ub
le
b
etween indoor
u
nit
s
, Indoor power OFF
(Comm
u
nic
a
tion
s
top
b
etween indoor he
a
der
a
nd follower or
b
etween m
a
in
a
nd
sub
indoor twin)
Mi
s
wiring
b
etween indoor
u
nit
a
nd o
u
tdoor
u
nit or connection tro
ub
le
(Comm
u
nic
a
tion
s
top
b
etween indoor
a
nd o
u
tdoor
u
nit
s
)
S
hort-circ
u
it connector not connected
Protective device of
indoor
u
nit worked.
Indoor DC f
a
n tro
ub
le
O
u
tdoor
u
nit di
s
ch
a
rge temp. tro
ub
le
Protective device of
∗
1
O
u
tdoor high pre
ssu
re
s
y
s
tem tro
ub
le
o
u
tdoor
u
nit worked.
Neg
a
tive ph
as
e detection tro
ub
le
He
a
t
s
ink overhe
a
t tro
ub
le
O
u
tdoor
u
nit tro
ub
le
G
as
le
a
k detection tro
ub
le
4-w
a
y v
a
lve
s
y
s
tem tro
ub
le (Indoor or o
u
tdoor
u
nit j
u
dged.)
O
u
tdoor
u
nit high pre
ssu
re protection
O
u
tdoor
u
nit: O
u
tdoor
u
nit tro
ub
le
Protective device of
O
u
tdoor
u
nit: Inverter Idc oper
a
tion
∗
1
O
u
tdoor
u
nit: Po
s
ition detection tro
ub
le
o
u
tdoor
u
nit worked.
S
topped
b
ec
aus
e of tro
ub
le of other indoor
u
nit in
a
gro
u
p
(Check code
s
of E03/L03/L07/L08)
