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In addition, the lamp will continue blinking for approximately
three seconds after the switch is released.
The motor will remain stopped while the lamp is blinking.
(Fig. 30)
Because the RFC feature may not activate or its
performance may be insuffi cient depending on the
working environment and conditions, be careful not to
suddenly overburden the tool bit while operating.
● Possible causes of sudden overburdening
1 Tool bit biting into material
2 Impact against nails, metal or other hard objects
3 Tasks involving prying or any excess application of
pressure, etc.
Also, other causes include any combination of the
aforementioned.
● When the reactive force control (RFC) is triggered
When the RFC is triggered and the motor stops, turn
off the tool's switch and remove the cause of the
overburdening before continuing operation.
MAINTENANCE AND INSPECTION
CAUTION: Pull out battery before doing any inspection or maintenance.
1. Inspecting the tool bits
Since use of a dull tool will cause motor malfunctioning
and degraded effi ciency, replace the tool bit with a
new one or resharpening without delay when abrasion
is noted.
2. Inspecting the screws
Regularly inspect all screws and ensure that they
are properly tightened. Should any of the screws be
loose, retighten them immediately.
WARNING
Using this Rotary Hammer with loosen screws is
extremely dangerous.
Arms are twisted
Fig. 30
OPERATIONAL CAUTIONS
Resting the unit after continuous work
(1) The power tool is equipped with a temperature
protection circuit to protect the motor.
Continuous work may cause the temperature of the
unit to rise, activating the temperature protection
circuit and automatically stopping operation.
If this happens, allow the power tool to cool before
resuming use.
(2) After use for continuous work, rest the unit for 15
minutes or so when replacing the battery. The
temperature of the motor, switch, etc., will rise if
the work is started again immediately after battery
replacement, eventually resulting in burnout.
3. Maintenance of the motor
The motor unit is the very "heart" of the power tool.
Exercise due care to ensure the motor does not
become damaged and/or wet with oil or water.
4. Grease replacement
This Rotary Hammer is of full air-tight construction to
protect against dust and to prevent lubricant leakage.
Therefore, this Rotary Hammer can be used without
lubrication for long periods. Replace the grease as
described below.
○ Grease Replacement Period
After purchase, replace grease after every 6 months
of usage. Ask for grease replacement at the nearest
authorized Service Center.
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