Overload Protection; Operation - Makita DUH551 Instruction Manual

• 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.
Indicating the remaining battery capacity
Only for battery cartridges with the indicator (Fig. 2)
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.
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.
Remaining
capacity
Blinking
75% to 100%
50% to 75%
25% to 50%
0% to 25%
Charge the
battery.
The battery may
have
malfunctioned.
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
the figure. The handle is locked in 45° position. To turn the
handle to 90° position, pull the knob again and turn the
handle more.
Switch action
CAUTION:
• Before inserting the battery cartridge into the tool,
always check to see that the switch trigger actuates
properly and returns to the "OFF" position when
released. (Fig. 5)
For your safety, this tool has a dual switching system. To
turn on the tool, press the lock-off button and press the
switch trigger A and B. To turn off the switch, release
either one of the switch triggers. The tool only starts when
pulling the both switch triggers.
Speed change (Fig. 6)
The strokes per minute can be adjusted just by turning the
adjusting dial. This can be done even while the tool is
running. The dial is marked 1 (lowest speed) to 6 (full
speed).
Refer to the table below for the relationship between the
number settings on the adjusting dial and the strokes per
minute.
Number on adjusting dial
6
5
4
3
2
1
011264
CAUTION:
• The speed adjusting dial can be turned only as far as 6
and back to 1. Do not force it past 6 or 1, or the speed
adjusting function may no longer work.
• The strokes per minute vary by the conditions of
battery cartridge and shear blades.

OPERATION

CAUTION:
• Be careful not to accidentally contact a metal fence or
other hard objects while trimming. The blade will break
and may cause serious injury.
Strokes per minute (min
1,800
1,750
1,650
1,500
1,300
1,000
-1
)
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