Hitachi WH 9DMR Handling Instructions Manual page 9

〈 UC18YGH 〉
Before using the impact driver or impact wrench, charge
the battery as follows.
1. Connect the charger's power cord to the receptacle.
When connecting the plug of the charger to a
receptacle, the pilot lamp will blink in red
(At 1-second intervals).
2. Insert the battery into the charger.
Firmly insert the battery into the charger till it contacts
the bottom of the charger and checking the polarities.
CAUTION:
If the batteries are inserted in the reverse direction,
not only recharging will become impossible, but it
Table 3
Before charging
While charging
Charging complete
Overheat standby
(2) Regarding the temperature 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 4
Rechargeable batteries
Ni-Cd batteries
Ni-MH batteries
4. Disconnect the charger's power cord from the
receptacle.
5. Hold the charger firmly and pull out the battery.
NOTE
Be sure to pull out the battery from the charger after
use, and then keep it.
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.
Indications of the pilot lamp
Blinks Lights for 0.5 seconds. Does not light
for 0.5 seconds. (off for 0.5 seconds)
Lights Lights continuously
Blinks Lights for 0.5 seconds. Does not light
for 0.5 seconds. (off for 0.5 seconds)
Blinks Lights for 1 second. Does not light
for 0.5 seconds. (off for 0.5 seconds)
Temperatures at which the
battery can be recharged
0°C — 45°C
–5°C — 50°C
may also cause problems in the charger such as a
deformed recharging terminal.
3. Charging
When inserting a battery in the charger, the pilot
lamp will light up continuously in red.
When the battery becomes fully recharged, the pilot
lamp will blink in red (At 1-second intervals). (See
Table 3)
(1) Pilot lamp indication
The indications of the pilot lamp will be as shown in
Table 3, according to the condition of the charger or
the rechargeable battery.
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.
〈UC18YG〉
Before using the impact driver or impact wrench, charge
the battery as follows.
1. Connect the charger power cord to the receptacle
Connecting the power cord will turn on the charger.
2. Insert the battery into the charger
Insert the battery firmly while observing its direction,
until it contacts the bottom of the charger (the pilot
lamp lights up).
CAUTION
If the pilot lamp does not light up, pull out the
power cord from the receptacle and check the
battery mounting condition.
About 60 minutes is required to fully charge the
battery at a temperature of about 20°C. The pilot
lamp goes off to indicate that the battery is fully
charged.
English
Battery overheated.
Unable to charge.
(Charging will commence
when battery cools)
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