Hitachi RAD-25NH5, Service Manual, Page: 48 / 371

Ð2
2Ð
¥I
fthe
unit
still
fails
to
oper
ate
nor
mally
after
perf
or
ming
the
abo
ve
inspections
,
tur
n
the
circuit
break
er
off
and
contact
your
sales
agent
immediately
.
¥
The
circuit
breaker
switches
off
or
the
fuse
blows
frequently.
¥
The
switch
operation
is
not
stable.
¥
Foreign
matter
or
water
accidentally
enters
the
unit
interior.
¥
The
power
cord
gets
excessively
hot
or
its
insulation
is
torn
or
stripped.
¥
TIMER
lamp
on
the
indoor
unit
display
blinks.
As
the
nature
of
the
failure
can
be
identified
by
the
blinking
cycle,
check
the
blinking
cycle
before
turning
off
the
circuit
breaker.
¥
Please
contact
your
sales
agent
immediately
ifthe
air
conditioner
still
fails
to
operate
normally
after
the
above
inspections.
Inform
your
agent
of
the
model
of
your
unit,
production
number,
date
of
installation.
Please
also
inform
him
regarding
the
fault.
Please
note:
On
switching
on
the
equipment,
particularly
when
the
room
light
is
dimmed,
a
slight
brightness
fluctuation
may
occur.
This
is
of
no
consequence.
The
conditions
of
the
local
Power
Supply
Companies
are
to
be
observed.
¥I
n
quiet
operation
or
stopping
the
running,
the
following
phenomena
may
occasionally
occur,
but
they
are
not
abnormal
for
the
operation.
(1)
Slight
flowing
noise
of
refrigerant
in
the
refrigerating
cycle.
(2)
Slight
rubbing
noise
from
the
fan
casing
which
is
cooled
and
then
gradually
warmed
as
operation
stops.
¥
The
odor
will
possibly
be
emitted
from
the
room
air
conditioner
because
the
various
odor,
emitted
by
smoke,
foodstuffs,
cosmetics
and
so
on,
sticks
to
it.
So
please
clean
the
air
filter
and
the
evaporator
regularly
to
reduce
the
odor.
Steam
emitted
from
the
outdoor
unit
Water
generated
during
defrosting
operation
evaporates
and
steam
is
emitted.
Odors
Caused
as
the
smells
and
particles
of
smoke,
food,
cosmetics,
etc.
present
in
room
air
become
attached
the
unit
and
blown
off
into
the
room
again.
Defrosting
is
underway
(as
the
heating
operation
is
stopped,
the
microcomputer
checks
frost
accumulated
in
the
indoor
unit
and
instructs
the
unit
to
perform
automatic
defrosting
if
necessary).
Shows
preheating
or
defrosting
operation
is
underway.
As
the
protective
circuit
or
preheat
sensor
operates
when
unit
operation
is
stopped
during
preheating
and
then
restarted,
or
when
operation
mode
is
switched
from
cooling
to
heating,
the
lamp
continues
to
blink.
Actual
room
temperature
may
deviate
slightly
from
the
remote
controller
Õs
temperature
setting
depending
on
the
number
of
people
in
the
room,
indoor
or
outdoor
conditions
when
the
air
conditioner
is
used
for
more
than
one
room
at
the
same
time.
The
outdoor
unit
continues
to
operate
even
if
operation
is
stopped.
Does
not
reach
the
temperature
setting. The
OPERATION
lamp
is
blinking.
()
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