Prior To Operation; How To Use - Hitachi DV 14DV Handling Instructions Manual

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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
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 batetery has just
been used, the pilot lamp of the charger lights up
green. In such a case, first let the battery cool, then
start charging.
When the pilot lamp flickers in red (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.
Since the built-in micro computer takes about 3
seconds to confirm that the battery being charged
with UC24YFA 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. Setting up and checking the work environment
Check if the work environment is suitable by
following the precautions.

HOW TO USE

1. Confirm the cap position (see Fig. 4)
The three modes of screwdriver, drill and impact
drill can be switched by the position of the cap in
this unit.
(1) When using this unit as a screwdriver, line up the
one of the numbers "1, 3, 5 ... 22" on the cap, or
the white dots, with the triangle mark on the outer
body.
(2) When using this unit as a drill, align the cap drill
mark " " with the triangle mark on the outer
body.
(3) When using this unit as an impact drill, align the
cap hammer mark " " with the triangle mark on
the outer body.
CAUTIONS
The cap cannot be set between the numerals "1,
3, 5 ... 22" or the white dots.
30
Do not use with the cap numeral between "22" and
the white line at the middle of the drill mark. Doing
so may cause damage. (See Fig. 5)
2. Tightening torque adjustment
(1) Tightening torque
Tightening torque should correspond in its intensity
to the screw diameter. When too strong torque is
used, the screw head may be broken or be injured.
Be sure to adjust the cap position according to the
screw diameter.
(2) Tightening torque indication
The tightening torque differs depending on the type
of screw and the material being tightened.
The unit indicates the tightening torque with the
numbers "1, 3, 5 ... 22" on the cap, and a white
dots. The tightening toque at position "1" is the
weakest and the torque is strongest at the highest
number. (See Fig. 4)
(3) Adjusting the tightening torque
Rotate the cap and line up the numbers "1, 3, 5,
... 22" on the cap, or the white dots, with the
triangle mark on the outer body. Adjust the cap in
the weak or the strong torque direction according
to the torque you need.
CAUTIONS
The motor rotation may be locked to cease while
the unit is used as drill. While operating the impact
drill, take care not to lock the motor.
Too long hammering may cause the screw broken
due to excessive tightening.
3. Rotation to Impact changeover (See Fig. 4)
The "Rotation (Rotation only)" and "Impact (Impact
+ Rotation)" can be switched by aligning the drill
mark " " or the hammer mark " " with the
triangle mark on the outer body.
To make holes in the metal, wood or plastic, switch
to "Rotation (Rotation only)".
To make holes in bricks or concrete blocks, switch
to "Impact (Impact + Rotation)".
CAUTION
If an operation which is normally performed at the
"Rotation" setting is performed at "Impact " setting,
the effect of making holes does not only increase
but it may also damage the bit or other parts.
4. Change rotation speed
Operate the shift knob to change the rotational
speed. Move the shift knob in the direction of the
arrow (see Figs. 6 and 7).
When the shift knob is set to "LOW", the drill
rotates at a low speed. When set to "HIGH", the
drill rotates at a high speed.
CAUTION
When changing the rotational speed with the shift
knob, confirm that the switch is off.
Changing the speed while the motor is rotating will
damage the gears.
When setting the shift knob to "HIGH" (high speed)
and the position of the cap is "17" or "22", it may
happen that the clutch does not engaged and that
the motor is locked. In such a case, please set the
shift knob to "LOW" (low speed).
If the motor is locked, immediately turn the power
off. If the motor is locked for a while, the motor
or battery may be burnt.