DeWalt DWE4377 Instruction Manual page 42

ENGlIsh
If the power supply is shut off by the RCD, take the tool to an
authorised D WALT repair agent.
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WARNING: In extreme working conditions, conductive
dust can accumulate inside the machine housing when
working with metal. This can result in the protective
insulation in the machine becoming degraded with a
potential risk of an electrical shock.
To avoid build-up of metal swarf inside the machine, we
recommend to clear the ventilation slots on a daily basis.
Refer to Maintenance.
Cutting Metal
For cutting with bonded abrasives, always use the
guard type 1.
When cutting, work with moderate feed, adapted to the
material being cut. Do not exert pressure onto the cutting
disc, tilt or oscillate the machine.
Do not reduce the speed of running down cutting discs by
applying sideward pressure.
The machine must always work in an upgrinding motion.
Otherwise, the danger exists of it being pushed uncontrolled
out of the cut.
When cutting profiles and square bar, it is best to start at the
smallest cross section.
Rough Grinding
Never use a cutting disc for roughing.
always use the guard type 27.
The best roughing results are achieved when setting the
machine at an angle of 30° to 40°. Move the machine back
and forth with moderate pressure. In this manner, the
workpiece will not become too hot, does not discolour and
no grooves are formed.
Cutting Stone
The machine shall be used only for dry cutting.
For cutting stone, it is best to use a diamond cutting
disc. Operate the machine only with additional dust
protection mask.
Working Advice
Exercise caution when cutting slots in structural walls.
Slots in structural walls are subject to the country-
specific regulations. These regulations are to be observed
under all circumstances.Before beginning work, consult
the responsible structural engineer, architect or the
construction supervisor.
MAINTENANCE

WARNING: To reduce the risk of serious personal
injury, turn unit off and disconnect it from
power source before making any adjustments or
removing/installing attachments or accessories.
An accidental start-up can cause injury.
Your D WALT power tool has been designed to operate
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over a long period of time with a minimum of maintenance.
Continuous satisfactory operation depends upon proper tool
care and regular cleaning.
40
Cleaning

WARNING: Blow dirt and dust out of all air vents with
clean, dry air at least once a week. To minimize the
risk of eye injury, always wear approved eye protection
when performing this procedure.

WARNING: Never use solvents or other harsh
chemicals for cleaning the non-metallic parts of the
tool. These chemicals may weaken the plastic materials
used in these parts. Use a cloth dampened only with
water and mild soap. Never let any liquid get inside the
tool; never immerse any part of the tool into a liquid.
LED Guide
The section provides a list of possible LED blink patterns, their
causes and corrective solutions. The user or maintenance
personnel can perform some corrective actions, and others
may require the assistance of qualified D
your dealer.
Problem
The switch is in the on position
and power has been applied. The
unit stayed off.
Problem
A pinch has been sensed by
the tool and the kickback brake
has activated.
Problem
The unit has shut down to prevent
permanent damage due to
overheating.
Problem
The unit has been in a stalled
condition for an extended period
and it has shut down.
Problem
The unit is running on a poor
quality power source like a low
quality generator. This power may
damage the tool.
WALT technician or
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No-Volt Protection
Solution
Cycle the switch to restart.
Kick Back Brake
Solution
Inspect accessory for damage from
pinch and replace if necessary.
Adjust work piece and tool position
as necessary and cycle switch
to restart.
Thermal Protection
Solution
Ensure intake and exhaust vents
are not blocked by users hands,
clothing or debris during use.
Reduce frequency of feathering
the tool on/off and cycle switch to
restart and/or unplug the unit and
then plug it back in.
Stall/Overload Protection
Solution
Remove load from tool and cycle
the switch to restart.
Problem Power Line
Solution
Try another power source, reduce
extension cord length or reduce
equipment used on the power
source at one time.