17
<UC18YFSL
/
UC18YGSL>
Indications
of
the
pilot
lamp
Pilot
lamp
(red)
Before
charging
Blinks
Lights
for
0.5
seconds.
Does
not
light
for
0.5
seconds.
(o
ff
for
0.5
seconds)
While
charging
Lights
Lights
continuously
Charging
complete
Blinks
Lights
for
0.5
seconds.
Does
not
light
for
0.5
seconds.
(o
ff
for
0.5
seconds)
Overheat
standby
Blinks
Lights
for
1
second.
Does
not
light
for
0.5
seconds.
(o
ff
for
0.5
seconds)
Battery
overheated.
Unable
to
charge.
(Charging
will
commence
when
battery
cools)
Charging
impossible
Flickers
Lights
for
0.1
second.
Does
not
light
for
0.1
seconds.
(o
ff
for
0.1
seconds)
Malfunction
in
the
battery
or
the
charger
(2)
Regarding
the
temperatures
of
the
rechargeable
battery
The
temperatures
for
rechargeable
batteries
are
as
shown
in
the
Table 2
,
and
batteries
that
have
become
hot
should
be
cooled
for
a
while
before
being
recharged.
Table 2
Recharging
ranges
of
batteries
Rechargeable
batteries
Temperatures
at
which
the
battery
can
be
recharged
BSL1430,
BSL1440
BSL1820,
BSL1830
BSL1840
0°C
–
40°C
(3)
Regarding
recharging
time
Depending
on
the
combination
of
the
charger
and
batteries,
the
charging
time
will
become
as
shown
in
Table 3.
Table 3
Charging
time
(At
20°C)
(AC
power
supply
/
DC
12V
(in-car)
power
supply)
Charger
Battery
UC18YML2
UC18YRSL
UC18YFSL
UC18YGSL
BSL1820
Approx.
30
/
80
min.
Approx.
30
min.
Approx.
60
min.
BSL1430
BSL1830
Approx.
45
/
120
min.
Approx.
45
min.
Approx.
90
min.
BSL1440
BSL1840
Approx.
60
/
160
min.
Approx.
60
min.
Approx.
120
min.
NOTE
The
recharging
time
may
vary
according
to
the
ambient
temperature
and
power
source
voltage.
<UC18YML2>
Especially,
using
a
DC
12V
in-car
power
source
may
require
longer
recharging
time
at
high
temperatures.
CAUTION
When
the
battery
charger
has
been
continuously
used,
the
battery
charger
will
be
heated,
thus
constituting
the
cause
of
the
failures.
Once
the
charging
has
been
completed,
give
15
minutes
rest
until
the
next
charging.
4. Disconnect the charger’s power cord from the
receptacle or cigarette lighter socket
5. Hold the charger
fi
rmly and pull out the battery.
NOTE
Be
sure
to
pull
out
the
battery
from
the
charger
after
use,
and
then
keep
it.
How to make the batteries perform longer
(1)
Recharge
the
batteries
before
they
become
completely
exhausted.
When
you
feel
that
the
power
of
the
tool
becomes
weaker,
stop
using
the
tool
and
recharge
its
battery.
If
you
continue
to
use
the
tool
and
exhaust
the
electric
current,
the
battery
may
be
damaged
and
its
life
will
become
shorter.
(2)
Avoid
recharging
at
high
temperatures.
A
rechargeable
battery
will
be
hot
immediately
after
use.
If
such
a
battery
is
recharged
immediately
after
use,
its
internal
chemical
substance
will
deteriorate,
and
the
battery
life
will
be
shortened.
Leave
the
battery
and
recharge
it
after
it
has
cooled
for
a
while.
CAUTION
○
If
the
battery
is
charged
while
it
is
heated
because
it
has
been
left
for
a
long
time
in
a
location
subject
to
direct
sunlight
or
because
the
battery
has
just
been
used,
the
pilot
lamp
of
the
charger
lights
up
green.
In
such
a
case,
fi
rst
let
the
battery
cool,
then
start
charging.
○
When
the
pilot
lamp
fl
ickers
in
red
(at
0.2-second
intervals),
check
for
and
take
out
any
foreign
objects
in
the
charger’s
battery
connector.
If
there
are
no
foreign
objects,
it
is
probable
that
the
battery
or
charger
is
malfunctioning.
Take
it
to
your
authorized
Service
Center.
○
Since
the
built-in
micro
computer
takes
about
3
seconds
to
con
fi
rm
that
the
battery
being
charged
with
UC18YML2
/
UC18YRSL
/
UC18YFSL
/
UC18YGSL
is
taken
out,
wait
for
a
minimum
of
3
seconds
before
reinserting
it
to
continue
charging.
If
the
battery
is
reinserted
within
3
seconds,
the
battery
may
not
be
properly
charged.
○
Check
the
voltage
of
the
in-car
power
source
when
the
pilot
lamp
fl
ickers
in
green
(every
0.2
seconds)
continuously.
(UC18YML2)
If
the
voltage
is
12V
or
lower,
it
indicates
that
the
car
battery
has
weakened
and
cannot
be
charged.
○
If
the
pilot
lamp
does
not
blink
in
red
(every
second)
even
though
the
charger
cord
or
cigarette
lighter
connecting
plug
is
connected
to
the
power,
it
indicates
that
the
protection
circuit
of
the
charger
may
be
activated.
Remove
the
cord
or
plug
from
the
power
and
then
connect
it
again
after
30
seconds
or
so.
If
this
does
not
cause
the
pilot
lamp
to
blink
in
red
(every
second),
please
take
the
charger
to
the
Hitachi
Authorized
Service
Center.
000Book̲WH14DBEL̲C99209721̲305.indb 17
000Book̲WH14DBEL̲C99209721̲305.indb 17
2013/06/13 10:55:58
2013/06/13 10:55:58