Hitachi WR 12DAF Handling Instructions Manual page 9

CAUTION
If the pilot lamp does not light up, pull out the
power cord from the receptacle and check the battery
mounting condition.
About 1 hour is required to fully charge the battery
at a temperature of about 20°C. The pilot lamp goes
off to indicate that the batterry is fully charged.
The battery charging time becomes longer when a
temperature is low or the voltage of the power
source is too low.
When the pilot lamp does not go off even if more
than two hours have elapsed after starting of the
charging, stop the charging and contact your HITACHI
AUTHORIZED SERVICE CENTER.
CAUTION
If the battery is heated due to direct sunlight, etc.,
just after operation, the charger pilot lamp may not
light up. At that time, cool the battery first, then
start charging.
3. Disconnect the charger power cord from the receptacle
4. Hold the charger tight 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
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.
Before Blinks
charging (RED)
While Lights
charging (RED)
Charging Blinks
complete (RED)
Charging Flickers
impossible (RED)
Charging Lights
impossible (GREEN)
(2) Avoid recharging at high temperatures.
〈UC14YFA〉
Before using the impact wrench, charge the battery as
follows.
1. Connect the charger's power cord to a receptacle
2. Insert the battery into the charger
CAUTION
3. Charging
(1) Pilot lamp indication
Table 3
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
If you continue to use the tool and exhaust the
electric current, the battery may be damaged and
its life will become shorter.
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.
When the power cord is connected, the charger's
pilot lamp will blink in red (At 1-second intervals).
Insert the battery firmly, in the direction shown in
Fig. 4, until it contacts the bottom of the charger
compartment.
If the battery is inserted in the reverse direction,
not only recharging will become impossible, but it
may also cause the fuse to blow, or problems in
the charger such as deformed recharging terminal.
When inserting a battery in the charger, charging
will commence and the pilot lamp will light
continuously in red.
When the battery becomes fully recharged, the pilot
lamp will blink in red (At 1-second intervals.) (See
Table 3).
The indications of the pilot lamp will be as shown
in Table 3, according to the condition of the charger
or the rechargeable battery.
Malfunction in the battery
or the charger.
The battery temperature
is high, making recharg-
ing impossible.
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