Overload Protection; Overheat Protection; Overdischarge Protection - Makita DUC307 Instruction Manual

Tool / battery protection system
The tool is equipped with a tool/battery protection sys-
tem. This system automatically cuts off power to the
motor to extend tool and battery life. The tool will auto-
matically stop during operation if the tool or battery is
placed under one of the following conditions:

Overload protection

When the tool or battery is operated in a manner that
causes it to draw an abnormally high current, the tool
automatically stops. 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

When the tool or battery is overheated, the tool stops
automatically. In this case, let the tool and battery cool
before turning the tool on again.
NOTE: In high temperature environment, the over-
heat protection likely to work and the tool stops
automatically.

Overdischarge protection

When the battery capacity is not enough, the tool stops
automatically. In this case, remove the battery from the
tool and charge the battery.
Protections against other causes
Protection system is also designed for other causes
that could damage the tool and allows the tool to stop
automatically. Take all the following steps to clear the
causes, when the tool has been brought to a temporary
halt or stop in operation.
1. Turn the tool off, and then turn it on again to
restart.
2. Charge the battery(ies) or replace it/them with
recharged battery(ies).
3. Let the machine and battery(ies) cool down.
If no improvement can be found by restoring protection
system, then contact your local Makita Service Center.
NOTICE:
If the tool stops due to a cause
not described above, refer to the section for
troubleshooting.
Switch action
WARNING:
For your safety, this tool is
equipped with the lock-off button which prevents
the tool from unintended starting. Never use the
tool if it starts when you pull the switch trigger
without pressing the lock-off button. Ask your local
Makita Service Center for repairs.
WARNING:
Never disable the lock function or
tape down the lock-off button.
CAUTION:
Before installing the battery car-
tridge into the tool, always check to see that the
switch trigger actuates properly and returns to
the "OFF" position when released.
NOTICE:
Do not pull the switch trigger forcibly
without pressing the lock-off button. The switch
may break.
► Fig.5: 1. Lock-off button 2. Switch trigger
To prevent the switch trigger from being accidentally
pulled, a lock-off button is provided. To start the tool,
press the lock-off button and pull the switch trigger.
Release the switch trigger to stop.
Checking the chain brake
CAUTION:
Hold the chain saw with both
hands when switching it on. Hold the rear handle
with your right hand, the front handle with your
left. The bar and the chain must not be in contact
with any object.
CAUTION:
Should the saw chain not stop
immediately when this test is performed, the
saw may not be used under any circumstances.
Consult our authorized service center.
1. Press the lock-off button, then pull the switch
trigger. The saw chain starts immediately.
2. Push the front hand guard forwards with the back
of your hand. Make sure that the chain saw comes to an
immediate standstill.
► Fig.6: 1. Front hand guard 2. Unlocked position
3. Locked position
Checking the run-down brake
CAUTION:
If the saw chain does not stop
within one second in this test, stop using the
chain saw and consult our authorized service
center.
Run the chain saw then release the switch trigger com-
pletely. The saw chain must come to a standstill within
one second.
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.
CAUTION:
Do not touch the saw chain with
bare hands. Always wear gloves when handling
the saw chain.
Installing or removing saw chain
CAUTION:
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.
CAUTION:
Carry out the procedure of install-
ing or removing saw chain in a clean place free
from sawdust and the like.
16 ENGLISH