Functional Description - Makita DUH551 Instruction Manual

A battery short can cause a large current flow,
overheating, possible burns and even a
breakdown.
6. Do not store the tool and battery cartridge in
locations where the temperature may reach or
exceed 50°C (122°F).
7. Do not incinerate the battery cartridge even if it is
severely damaged or is completely worn out. The
battery cartridge can explode in a fire.
8. Be careful not to drop or strike battery.
9. Do not use a damaged battery.
10. The contained lithium-ion batteries are subject to
the Dangerous Goods Legislation requirements.
For commercial transports e.g. by third parties,
forwarding agents, special requirement on packaging
and labeling must be observed.
For preparation of the item being shipped, consulting
an expert for hazardous material is required. Please
also observe possibly more detailed national
regulations.
Tape or mask off open contacts and pack up the
battery in such a manner that it cannot move around in
the packaging.
11. Follow your local regulations relating to disposal
of battery.
12. Use the batteries only with the products specified
by Makita. Installing the batteries to non-compliant
products may result in a fire, excessive heat,
explosion, or leak of electrolyte.
SAVE THESE INSTRUCTIONS.
CAUTION: Only use genuine Makita batteries.
Use of non-genuine Makita batteries, or batteries that
have been altered, may result in the battery bursting
causing fires, personal injury and damage. It will also void
the Makita warranty for the Makita tool and charger.
Tips for maintaining maximum battery life
1. Charge the battery cartridge before completely
discharged.
Always stop tool operation and charge the battery
cartridge when you notice less tool power.
2. Never recharge a fully charged battery cartridge.
Overcharging shortens the battery service life.
3. Charge the battery cartridge with room
temperature at 10°C - 40°C (50°F - 104°F). Let a hot
battery cartridge cool down before charging it.
4. Charge the battery cartridge if you do not use it for
a long period (more than six months).

FUNCTIONAL DESCRIPTION

CAUTION:
• Always be sure that the tool is switched off and the
battery cartridge is removed before adjusting or
checking function on the tool.
Installing or removing battery cartridge
(Fig. 1)
CAUTION:
• Always switch off the tool before installing or removing
of the battery cartridge.
10
• Hold the tool and the battery cartridge firmly when
installing or removing battery cartridge. Failure to
hold the tool and the battery cartridge firmly may cause
them to slip off your hands and result in damage to the
tool and battery cartridge and a personal injury.
To remove the battery cartridge, slide it from the tool while
sliding the button on the front of the cartridge.
To install the battery cartridge, align the tongue on the
battery cartridge with the groove in the housing and slip it
into place. Insert it all the way until it locks in place with a
little click. If you can see the red indicator on the upper
side of the button, it is not locked completely.
CAUTION:
• Always install the battery cartridge fully until the red
indicator cannot be seen. If not, it may accidentally fall
out of the tool, causing injury to you or someone
around you.
• Do not install the battery cartridge forcibly. If the
cartridge does not slide in easily, it is not being inserted
correctly.
NOTE:
• The tool does not work with only one battery cartridge.
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 tool/battery
When the tool/battery 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 tool/battery cool before turning the tool on again.
NOTE:
The battery overheat protection works only with a battery
cartridge with a star marking. (Fig. 2)
Overdischarge protection (Fig. 3)
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.
Handle mounting positions
CAUTION:
• Always make sure that the handle is locked in the
desired position before operation. (Fig. 4)
Depending on the operations, you can set the angle of the
handle either 45° or 90° position on left or right. To turn
the handle, pull the knob and turn the handle as shown in