Makita DUC252 Manuel D'instructions page 15

Tool/battery protection system
The tool is equipped with a tool/battery protection
system. This system automatically cuts off power to the
motor to extend tool and battery life.
The tool will automatically stop during operation if the
tool or battery are placed under one of the following
conditions. In some conditions, the indicators light up.
Overload protection
When the tool is operated in a manner that causes it to
draw an abnormally high current, the tool automatically
stops without any indication. In this situation, turn the tool
off and stop the application that caused the tool to
become overloaded. Then turn the tool on to restart.
Overheat protection for battery / tool
When the battery/tool is overheated, the tool stops
automatically without any indication. The tool does not
start even if pulling the switch trigger. In this situation, let
the battery/tool cool before turning the tool on again.
Overdischarge protection (Fig. 2)
When the remaining battery capacity gets low, the
battery indicator blinks on the applicable battery side. By
further use, the tool stops and the battery indicator lights
up about 10 seconds. In this situation, charge the battery
cartridge.
Indicating the remaining battery capacity (Fig. 3)
Only for battery cartridges with the indicator
Press the check button on the battery cartridge to
indicate the remaining battery capacity. The indicator
lamps light up for a few seconds.
Indicator lamps
Lighted Off
015658
NOTE:
• Depending on the conditions of use and the ambient
temperature, the indication may differ slightly from the
actual capacity.
• The first (far left) indicator lamp will blink when the
battery protection system works.
Remaining
Capacity
Blinking
75% to 100%
50% to 75%
25% to 50%
0% to 25%
Charge the
battery.
The battery may
have
malfunctioned.
Switch action (Fig. 4)
CAUTION:
• Before installing the battery cartridge into the tool,
always check to see that the switch trigger actuates
properly and returns to the "OFF" position when
released.
To prevent the switch trigger from being accidentally
pulled, a lock-off button is provided.
To start the tool, depress the lock-off button and pull the
switch trigger. Release the switch trigger to stop.
Checking the chain brake (Fig. 5)
NOTE:
• If the chain saw fails to start, the chain brake must be
released. Pull the front hand guard backwards firmly
until you feel it engage.
Hold the chain saw with both hands when switching it on.
Hold the top handle with your right hand, the front handle
with your left. The bar and the chain must not be in
contact with any object.
First press the lock-off button, then the switch trigger.
The saw chain starts immediately.
Press the front hand guard forwards using the back of
your hand. The saw chain must come to an immediate
standstill.
CAUTION:
• Should the saw chain not stop immediately when this
test is performed, the saw may not be used under any
circumstances. Consult a MAKITA specialist repair shop.
Checking the run-down brake
Switch on the chain saw.
Release the switch trigger completely. The saw chain
must come to a standstill within one second.
CAUTION:
• Should the saw chain not come to a stop within one
second when this test is performed, the saw must not
be used. Consult a MAKITA specialist repair shop.
Adjusting the chain lubrication (Fig. 6)
You can adjust the oil pump feed rate with the adjusting
screw. The amount of oil can be adjusted using the
universal wrench.
Carabiner (rope attachment point) (Fig. 7)
Carabiner (Rope attachment point) is for use of tool
hanging. Before using carabiner, pull it out and tie it with
a rope.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and the
battery cartridge is removed before carrying out any
work on the tool.
Removing or installing saw chain (Fig. 8, 9, 10, 11,
12 & 13)
CAUTION:
• Always wear gloves when installing or removing the
saw chain.
• The saw chain and the guide bar are still hot just after
the operation. Let them cool down enough before
carrying out any work on the tool.
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