– 53 –
10-5. Judgment of Trouble by Every Symptom
10-5-1. Indoor Unit (Including Remote Controller)
(1) Power is not turned on (Does not operate entirely)
<Primary check>
1. Is the supply voltage normal?
2. Is the normal voltage provided to the outdoor unit?
3. Is the crossover cable connected properly?
4. Is the fuse (F01) blown?
• Be sure to disconnect the motor connector CN210 after shut off the power supply, or it will be a cause of
damage of the motor.
T
u
rn off power
su
pply once,
a
nd 5
s
econd l
a
ter, t
u
rn it
on
a
g
a
in.
I
s
OPERATION
l
a
mp
b
linking?
I
s
it po
ss
i
b
le to
t
u
rn on power
su
pply
b
y
pre
ss
ing [
]
bu
tton on remote
control?
NO
NO
NO
YES
YES
YES
Doe
s
tr
a
n
s
mi
ss
ion
m
a
rk on
remote control
fl
as
h norm
a
lly,
a
nd i
s
it
s
s
ign
a
l
tr
a
n
s
mitted
properly?
YES
Doe
s
tr
a
n
s
mi
ss
ion
m
a
rk on
remote control
fl
as
h norm
a
lly,
a
nd i
s
it
s
s
ign
a
l
tr
a
n
s
mitted
properly?
Remote control i
s
defective.
Oper
a
tion
Check item
Conceiv
ab
le
principle c
aus
e
Me
asu
re
Item
b
y
s
ymptom
s
Refer to (4)
"Tro
ub
le
s
hooting for
Remote Control."
Unit oper
a
te
s
norm
a
lly.
I
s
f
us
e (F01) of
indoor control
b
o
a
rd
b
lown?
I
s
the
volt
a
ge
a
cro
ss
C0
8
me
asu
red
DC
3
10V
~3
40V?
NO
NO
P
a
rt
s
(R01, R0
3
,
R04, DB01, C01,
C0
8
, IC01,
a
nd
T01)
a
re
defective.
Are DC 5V,
DC 12V
su
pplied to
m
a
in P.C.
b
o
a
rd?
YES
NO
YES
P
a
rt
s
of power
su
pply circ
u
it
a
re
defective
Doe
s
f
a
n
motor
connector
b
etween
a
nd
s
hort-
circ
u
it?
YES
NO
Repl
a
ce m
a
in P.C.
b
o
a
rd.
Microcomp
u
ter
i
s
defective.
P
a
rt
s
a
re
defective
Repl
a
ce motor
