Overload Protection; Overdischarge Protection - Makita DUH551 Instruction Manual

Indicating the remaining battery capacity
Only for battery cartridges with the indicator
► Fig.2: 1. Indicator lamps 2. Check button
Press the check button on the battery cartridge to indi-
cate the remaining battery capacity. The indicator lamps
light up for a few seconds.
Indicator lamps
Lighted Off
NOTE: Depending on the conditions of use and the
ambient temperature, the indication may differ slightly
from the actual capacity.
NOTE: 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 sys-
tem. 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.

Overdischarge protection

► Fig.3: 1. Battery indicator
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.
Remaining
capacity
Blinking
75% to 100%
50% to 75%
25% to 50%
0% to 25%
Charge the
battery.
The battery
may have
malfunctioned.
Handle mounting positions
CAUTION:
• Always make sure that the handle is locked in
the desired position before operation.
► Fig.4: 1. Knob 2. Housing
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: 1. Switch trigger B 2. Switch trigger A
3. Lock-off button
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: 1. Adjusting dial
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 Strokes per minute (min )
6
5
4
3
2
1
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.
11 ENGLISH
-1
1,800
1,750
1,650
1,500
1,300
1,000