Hitachi WR 12DM - Manual (Page 11)

10
English
Table 5
Indications of the lamps
Lights for 0.5 seconds. Does not light for
0.5 seconds. (off for 0.5 seconds)
Lights continuously
Lights for 0.5 seconds. Does not light for
0.5 seconds. (off for 0.5 seconds)
Lights for 0.1 seconds. Does not light for
0.1 seconds. (off for 0.1 seconds)
Lights continuously
Before
charging
While
charging
Charging
complete
Charging
impossible
Charging
impossible
Blinks
(RED)
Lights
(RED)
Blinks
(RED)
Flickers
(RED)
Lights
(GREEN)
Malfunction in the battery
or the charger
The battery temperature
is high, making recharg-
ing impossible.
(2) Regarding the temperatures of the rechargeable
battery.
The temperatures for rechargeable batteries are as
shown in the table below, and batteries that have
become hot should be cooled for a while before
being recharged.
Table 6 Recharging ranges of batteries
(3) Regarding recharging time
Depending on the combination of the charger and
batteries, the charging time will become as shown
in Table 7.
Table 7 Charging time (At 20°C)
NOTE
The charging time may vary according to
temperature and power source voltage.
4. Disconnect the charger’s power cord from the
receptaele.
5. Hold the charger firmly and pull out the battery.
NOTE
After charging, pull out batteries from the charger
first, and then keep the batteries properly.
Regarding electric discharge in case of new batteries,
etc.
As the internal chemical substance of new batteries
and batteries that have not been used for an
extended period is not activated, the electric
Temperatures at
Rechargeable batteries which the battery
can be recharged
EB9B, EB1220BL –5°C – 60°C
EB930H, EB1230HL 0°C – 45°C
Charger
UC14YF2
Battery
EB9B, EB1220BL Approx. 60 min.
EB930H, EB1230HL Approx. 90 min.
discharge might be low when using them the first
and second time. This is a temporary phenomenon,
and normal time required for recharging will be
restored by recharging the batteries 2 – 3 times.
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
⅜ If the battery has been heated right after operation
(or due to sunlight, etc.), the charger’s pilot lamp
may not light in red. In such a case, first let the
battery cool, then start charging.
⅜ When the pilot lamp flickers in red quickly (at 0.2-
second intervals), check for and take out any foreign
objects in the charger’s battery installation hole. If
there are no foreign objects, it is probable that the
battery or charger is malfunctioning. Take it to your
Authorized Service Center.
⅜ Since the built-in micro computer takes about 3
seconds to confirm that the battery being charged
with UC14YF2 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.
PRIOR TO OPERATION
1. Preparing and checking the work environment
Make sure that the work site meets all the conditions
laid forth in the precautions.