English
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 charge indicator lamp of the charger lights
for 0.3 seconds, does not light for 0.3 seconds (off for
0.3 seconds). In such a case, fi rst let the battery cool,
then start charging.
○ When the charge indicator lamp fl ickers (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 confi rm that the battery being charged with
UC18YSL3 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.
MOUNTING AND OPERATION
Action
Removing and inserting the battery
Charging
Mounting the bit
Reversing the rotational direction
Switch operation
Removing and mounting the hook
Remaining battery indicator
How to use the LED light*
Tightening mode selector
function*
2
Charging a USB device from a
electrical outlet
Charging a USB device and
battery from a electrical outlet
How to recharge USB device
When charging of USB device is
completed
Selecting accessories
*1 How to use the LED light
NOTE
○ Press the light section switch on the switch panel to
change the lighting mode of the LED light from "Always-
ON" → "SW interlocked" → "OFF".
○ To conserve battery power, make sure to extinguish the
light as much as possible.
○ To prevent the battery power consumption caused
by forgetting to turn off the LED light, the light goes off
automatically in about 10 minutes.
*2 Tightening mode selector function
CAUTION
Select tightening mode while the trigger switch is
released. Failure to do so could result in malfunction.
Figure
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11-a
11-b
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By using the Tightening mode selector switch, the tightening
torque can be adjusted according to the type of work.
The Tightening mode switches between 5 diff erent modes
each time the Tightening mode selector switch is pressed.
Upon pulling the trigger switch in bolt single mode, the driver
will automatically stop after applying a number of impacts.
Soft / power / bolt and self drilling screw mode will commence
impact upon pulling the trigger switch and will continuously
apply impact without auto-stopping.
Soft mode is a mode that does not infl ict damage on thin
nails or decorative materials.
Power mode can be used for normal work up to heavy load
work.
Bolt mode has a short pull margin for the trigger switch,
making the driver ideal for high-speed tightening work.
Bolt single mode controls the impact, allowing control of the
tightening force. Use this mode for delicate work such as
tightening bolts for racks, fences, furniture, etc.
Self drilling screw mode is ideal for tightening self drilling
screws by reducing the chances of overtightening that could
result in severing the screw head, breaking the screw, or
slippage.
NOTE
○ The appropriate mode diff ers depending on the screw
and the material being screwed. Drive in a few test
screws and adjust the mode setting accordingly.
○ The tightening mode selector switch can only be set after
the battery has been installed in the driver and the trigger
2
switch has been pulled once.
2
MAINTENANCE AND INSPECTION
2
1. Inspecting the driver bit
2
Using a broken bit or one with a worn out tip is dangerous
3
because the bit can slip. Replace it.
2. Inspecting the mounting screws
3
Regularly inspect all mounting screws and ensure that
3
they are properly tightened. Should any of the screws be
loose, retighten them immediately. Failure to do so could
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result in serious hazard.
3. Maintenance of the motor
4
The motor unit winding is the very "heart" of the power
tool. Exercise due care to ensure the winding does not
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become damaged and/or wet with oil or water.
4. Inspection of terminals (tool and battery)
Check to make sure that swarf and dust have not
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collected on the terminals.
On occasion check prior, during and after operation.
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CAUTION
Remove any swarf or dust which may have collected on
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the terminals.
Failure to do so may result in malfunction.
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5. Cleaning on the outside
When the power tool is stained, wipe with a soft dry cloth
or a cloth moistened with soapy water. Do not use chloric
solvents, gasoline or paint thinner, for they melt plastics.
6. Storage
Store the power tool and battery in a place in which
the temperature is less than 40°C and out of reach of
children.
NOTE
Storing lithium-ion batteries.
Make sure the lithium-ion batteries have been fully
charged before storing them.
Prolonged storage (3 months or more) of batteries with
a low charge may result in performance deterioration,
signifi cantly reducing battery usage time or rendering
the batteries incapable of holding a charge.
However, signifi cantly reduced battery usage time may
be recovered by repeatedly charging and using the
batteries two to fi ve times.
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