Samsung AQV12ACME - Page 22

Troubleshooting
5-3-1 Check of indoor unit control board
> Unplug the power cord and plug it after 5 seconds.
>
Press
the
on/off
switch
located
in
indoor
unit
inside
to
operate
the
air
conditioner.
elf
the
air
conditioner
operates,
check
the
remocon
and
indoor
unit
display
board.
elf
the
air
conditioner
does
not
operate,
check
according
to
the
sequence
of
the
followings:
> Check sequence of indoor unit control board
Step
1
:
Check
whether
two
wires
of
power
cord
(Sky-blue,
brown)
are
connected
correctly
to
the
terminal
block.
Sky
-blue
:
connected
to
“N”
¢Brown
:
connected
to “L”
Step
2:
Check
whether
the
wire
connected
to
the
terminal
block
is
connected
correctly
to
the
control board.
(Control board) (Terminal block)
JN SKY-BLU N SKY-BLU (N1 )
RY71 __ BRN OL
jo —Sk 2
Step
3
:
Check
whether
the
fuse
(F701)(F702)
on
the
control
board
is
normal.
(5
[A]/
250[V]:F701)
(1[A]/250[V]
:
F702)
e
If
the
fuse
is
broken,
replace
it
with
the
new
one.
Step 4: check the output of SMPS on the control board.
¢ Input power AC187~AC264V-——-IC 02 Input: DC 12V
IC 02 Output : DC 5V
5-3-2 Display board and remocon check of indoor unit
>
Check
whether
the
connection
wire
of
Display
board
is
correctly
connected
to
CN91
connector.
[>
Check
the
voltage
of
remocon
battery.
-
the
voltage
of
one
battery
shall
be
higher
than
about
1.4
V, and
then
the
remocon
operates
normally.
t>
Check
whether
the
neon
sign
is
on
and
the
3
wave
long
fluorescent
lamp
is
on
around
the
indoor
unit.
-
After
putting
all
lamps
of
the
indoor
out
and
then
operate
it
by
remocon.
If
it
operates
with
the
remocon,
it
is
the
abnormality
due
to
the
interference
from
the
light
of
lamps.
(Aircon
unit
is
normal).
5-3-3
Check
the
indoor
temperature
sensor
and
indoor
heat
exchanger
temperature
sensor.
Take
out
the
thermistor
connected
to
the
connector
(CN41)
of
control
board
of
indoor
unit
and
measure
the
resistance
between
two
wires
and
if
it
is
same
as
follows:
it
is
normal
but
if
not,
replace
it.
=
Ambient
ao
15°C
apie
a
a
Resistance
of
thermistor
[KQ]
14.68
12.09
Samsung Electronics
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