Worx Professional WU388 User manual

LITHIUM-ION BRUSHLESS ROTARY HAMMER
יטוחלא ןושיטפ
WU388 WU388.1 WU388.2 WU388.3 WU388.4 WU388.A WU388.9

4321
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8
9
5
6
10

a
DC
A DB

5
EN
GENERAL POWER TOOL
SAFETY WARNINGS
WARNING Read all safety warnings and all
instructions. Failure to follow the warnings and
instructions may result in electric shock, fire and/or
serious injury.
Save all warnings and instructions for future
reference.
The term “power tool” in the warnings refers to your
mains-operated (corded) power tool or battery-operated
(cordless) power tool.
1) Work area safety
a) Keep work area clean and well lit. Cluttered or
dark areas invite accidents.
b) Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases or dust. Power tools
create sparks which may ignite the dust or fumes.
c) Keep children and bystanders away while
operating a power tool. Distractions can cause
you to lose control.
2) Electrical safety
a) Power tool plugs must match the outlet. Never
modify the plug in any way. Do not use any
adapter plugs with earthed (grounded) power
tools. Unmodified plugs and matching outlets will
reduce risk of electric shock.
b) Avoid body contact with earthed or grounded
surfaces, such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric
shock if your body is earthed or grounded.
c) Do not expose power tools to rain or wet
conditions. Water entering a power tool will
increase the risk of electric shock.
d) Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the power tool.
Keep cord away from heat, oil, sharp edges
or moving parts. Damaged or entangled cords
increase the risk of electric shock.
e) When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of
a cord suitable for outdoor use reduces the risk of
electric shock.
f) If operating a power tool in a damp location is
unavoidable, use a residual current device (RCD)
protected supply. Use of an RCD reduces the risk
of electric shock.
3) Personal safety
a) Stay alert, watch what you are doing and
use common sense when operating a power
tool. Do not use a power tool while you are
tired or under the influence of drugs, alcohol
or medication. A moment of inattention while
operating power tools may result in serious
personal injury.
b) Use personal protective equipment. Always
wear eye protection. Protective equipment such
as dust mask, non-skid safety shoes, hard hat, or
hearing protection used for appropriate conditions
will reduce personal injuries.
c) Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to power source and/or battery pack, picking
up or carrying the tool. Carrying power tools with
your finger on the switch or energising power tools
that have the switch on invites accidents.
d) Remove any adjusting key or wrench before
turning the power tool on. A wrench or a key left
attached to a rotating part of the power tool may
result in personal injury.
e) Do not overreach. Keep proper footing and
balance at all times. This enables better control of
the power tool in unexpected situations.
f) Dress properly. Do not wear loose clothing
or jewellery. Keep your hair, clothing and
gloves away from moving parts. Loose clothes,
jewellery or long hair can be caught in moving
parts.
g) If devices are provided for the connection of
dust extraction and collection facilities, ensure
these are connected and properly used. Use of
dust collection can reduce dust-related hazards.
4) Power tool use and care
a) Do not force the power tool. Use the correct
power tool for your application. The correct
power tool will do the job better and safer at the
rate for which it was designed.
b) Do not use the power tool if the switch does
not turn it on and off. Any power tool that cannot
be controlled with the switch is dangerous and
must be repaired.
c) Disconnect the plug from the power source
and/or the battery pack from the power tool
before making any adjustments, changing
accessories, or storing power tools. Such
preventive safety measures reduce the risk of
starting the power tool accidentally.
d) Store idle power tools out of the reach of
children and do not allow persons unfamiliar
with the power tool or these instructions
to operate the power tool. Power tools are
dangerous in the hands of untrained users.
e) Maintain power tools. Check for misalignment
or binding of moving parts, breakage of parts
and any other condition that may affect the
power tool’s operation. If damaged, have the
power tool repaired before use. Many accidents
are caused by poorly maintained power tools.
f) Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
g) Use the power tool, accessories and tool bits
etc. in accordance with these instructions,
taking into account the working conditions and
the work to be performed. Use of the power tool
for operations different from those intended could
result in a hazardous situation.
5) Battery tool use and care
a) Recharge only with the charger specified by the
manufacturer. A charger that is suitable for one
type of battery pack may create a risk of fire when
used with another battery pack.
b) Use power tools only with specifically
designated battery packs. Use of any other
battery packs may create a risk of injury and fire.
c) When battery pack is not in use, keep it away
from other metal objects, like paper clips, coins,
keys, nails, screws or other small metal objects,
that can make a connection from one terminal

6
EN
to another. Shorting the battery terminals together
may cause burns or a fire.
d) Under abusive conditions, liquid may be ejected
from the battery; avoid contact. If contact
accidentally occurs, flush with water. If liquid
contacts eyes, additionally seek medical help.
Liquid ejected from the battery may cause irritation
or burns.
6) Service
a) Have your power tool serviced by a qualified
repair person using only identical replacement
parts. This will ensure that the safety of the power
tool is maintained.
HAMMER SAFETY
WARNINGS
1. Wear ear protectors. Exposure to noise can cause
hearing loss.
2. Use auxiliary handle(s), if supplied with the
tool. Loss of control can cause personal injury.
3. Hold power tool by insulated gripping surfaces,
when performing an operation where the
cutting accessory may contact hidden wiring.
Cutting accessory contacting a “live” wire may
make exposed metal parts of the power tool “live”
and could give the operator an electric shock.
ADDITIONAL SAFETY
RULES FOR HAMMER
1. Always wear a dust mask.
SAFETY WARNINGS FOR
BATTERY PACK
a) Do not dismantle, open or shred cells or battery
pack.
b) Do not short-circuit a battery pack. Do not store
battery packs haphazardly in a box or drawer
where they may short-circuit each other or be
short-circuited by conductive materials. When
battery pack is not in use, keep it away from other
metal objects, like paper clips, coins, keys, nails,
screws or other small metal objects, that can
make a connection from one terminal to another.
Shorting the battery terminals together may cause
burns or a fire.
c) Do not expose battery pack to heat or fire.
Avoid storage in direct sunlight.
d) Do not subject battery pack to mechanical
shock.
e) In the event of battery leaking, do not allow
the liquid to come into contact with the skin
or eyes. If contact has been made, wash the
affected area with copious amounts of water
and seek medical advice.
f) Seek medical advice immediately if a cell or
battery pack has been swallowed.
g) Keep battery pack clean and dry.
h) Wipe the battery pack terminals with a clean
dry cloth if they become dirty.
i) Battery pack needs to be charged before use.
Always refer to this instruction and use the
correct charging procedure.
j) Do not maintain battery pack on charge when
not in use.
k) After extended periods of storage, it may
be necessary to charge and discharge the
battery pack several times to obtain maximum
performance.
l) Battery pack gives its best performance when it
is operated at normal room temperature (20 °C
± 5 °C).
m) When disposing of battery packs, keep battery
packs of different electrochemical systems
separate from each other.
n) Recharge only with the charger specified by
WORX. Do not use any charger other than
that specifically provided for use with the
equipment. A charger that is suitable for one type
of battery pack may create a risk of fire when used
with another battery pack.
o) Do not use any battery pack which is not
designed for use with the equipment.
p) Keep battery pack out of the reach of children.
q) Retain the original product literature for future
reference.
r) Remove the battery from the equipment when
not in use.
s) Dispose of properly.
t) Do not mix cells of different manufacture,
capacity, size or type within a device.
u) Do not remove battery pack from its original
packaging until required for use.
v) Observe the plus (+) and minus (–) marks on the
battery and ensure correct use.

7
EN
SYMBOL
To reduce the risk of injury, user must
read instruction manual
Warning
Wear ear protection
Wear eye protection
Wear dust mask
Do not burn
Batteries may enter water cycle if disposed
improperly, which can be hazardous for eco-
system. Do not dispose of waste batteries
as unsorted municipal waste.
Li-Ion
Li-Ion
Li-Ion battery. This product has been
marked with a symbol relating to ‘sepa-
rate collection’ for all battery packs and
battery pack. It will then be recycled or
dismantled in order to reduce the impact
on the environment. Battery packs can be
hazardous for the environment and for hu-
man health since they contain hazardous
substances.
COMPONENT LIST
1. Depth Gauge
2. Dust Protection Cap
3. Tool Holder Locking Sleeve
4. Function Mode Selection Switch
5. On/Off Switch
6. Forward And Reverse Rotation Control
7. Battery Pack *
8. Auxiliary Handle
9. Battery Pack Release Button *
10. Auxiliary function button on tile
* Not all the accessories illustrated or described are
included in standard delivery.

8
EN
TECHNICAL DATA
WU388 WU388.1 WU388.2 WU388.3 WU388.4 WU388.A WU388.9
Rated voltage 20V
No load speed 0-1210/min
Impact rate 0-5400bpm
impact energy 2.2J
Battery model Li-ion (WA3595) Li-ion (WA3596) / /
Battery capacity 4.0 Ah 5.0 Ah / /
Max.
drilling
capacity
Steel 13mm
Wood 27mm
Masonry 24mm
Machine weight 3.2 kg 2.6 kg
ACCESSORIES
WU388 WU388.1 WU388.2 WU388.3 WU388.4 WU388.A WU388.9
Auxiliary
handle 1 1 1 1 1 1 1
Depth
gauge 1 1 1 1 1 1 1
Charger 1
(WA3924)
1
(WA3924)
1
(WA3922)
1
(WA3922)
1
(WA3924) / /
Battery
pack
2
(WA3595)
1
(WA3016)
2
(WA3596)
2
(WA3596)
1
(WA3596) / /
We recommend that you purchase your accessories listed in the above list from the same store that sold you the
tool. Refer to the accessory packaging for further details. Store personnel can assist you and offer advice.

9
EN
OPERATING
INSTRUCTIONS
NOTE: Before using the tool, read the
instruction book carefully.
INTENDED USE
The machine is intended for hammer drilling in
concrete, brick and stone. It is also suitable for drilling
without impact in wood, metal, ceramic and plastic.
BEFORE PUTTING INTO OPERATION
A) CHARGING THE BATTERY PACK
The battery pack charger supplied is matched to the
Li-ion battery installed in the machine. Do not use
another battery charger.
The Li-ion battery pack is protected against deep
discharging. When the battery pack is empty, the
machine is switched off by means of a protective
circuit: The chuck no longer rotates.
In a warm environment or after heavy use, the
battery pack may become too hot to permit charging.
Allow time for the battery pack to cool down before
recharging.
When the battery pack is charged for the first time
and after prolonged storage. The battery pack will
accept a 100% charge after several charge and
discharge cycles.
B) TO REMOVE OR INSTALL BATTERY PACK (SEE
FIG. A)
Depress the battery pack release button to release
and slide the battery pack out from your tool. After
recharge, slide it back into your tool. A simple push
and slight pressure will be sufficient.
OPERATION
1. INSERTING AND REMOVING DRILL BIT IN SDS
Take care that the dust protection cap (2) is not
damaged when changing tools.
— INSERTING
Clean and lightly oil the bit before inserting. Insert the
dust-free bit into the bit holder with a twisting motion
until it latches.
The bit locks itself. Check the locking by pulling on
the tool.
— REMOVING
Retract back the bit holder locking sleeve (3) and pull
out the bit.
WARNING！Your new WORX Rotary Hammer Drill
generates powerful forces to get your job done
quickly and effectively. These forces may cause
inferior quality SDS bits to break and jam in the
chuck，We therefore recommend that only high
quality SDS bits be used with this tool.
2. AUXILIARY HANDLE (SEE FIG. B)
Slide the handle onto the hammer and rotate to the
desired working position. To clamp the auxiliary
handle rotates the handle clockwise. To loosen the
auxiliary handle, rotate the handle counter-clockwise.
Warning: Always use the auxiliary handle.
3. ADJUSTABLE DEPTH GAUGE(SEE FIG. B)
Loosen the depth gauge by rotating the handle
counter-clockwise. Slide the depth gauge until the
distance between the depth gauge end and the drill
bit end is equal to the depth of hole/screw you wish
to make. Then clamp the depth gauge by rotating the
handle clockwise.
4. ON/OFF SWITCH (SEE FIG. C)
Depress the On/Off switch (5) to start and release it
to stop your tool.
— ON/OFF SWITCH WITH VARIABLE SPEED
CONTROL
Depress the On/Off switch to start and release it to
stop your tool. This tool has a variable speed switch
(5) that delivers higher speeds with increased trigger
pressure or delivers lower speeds with reduced
trigger pressure - speed is controlled by varying the
pressure applied to the switch.
5. SWITCH LOCK (SEE FIG. C)
The switch trigger can be locked in the OFF position.
This helps to reduce the possibility of accidental
starting when not in use. To lock the switch trigger,
place the direction of rotation control in the center
position.
6. FORWARD AND REVERSE ROTATION CONTROL
(SEE FIG. C)
Forward rotation: Push the forward and reverse
rotation control to the left “ “, for drilling
Reverse rotation: Push the forward and reverse
rotation control to the right ” “ , for removing the
drill bits.
WARNING: Never change the direction of rotation
while the tool is rotating, wait until it has stopped.
7. AUXILIARY FUNCTION ON TILE
1) Press ON/OFF switch to see the light is on or off.
Light on indicates the auxiliary function is on, and light
off indicate the auxiliary function is turn off.
2) When operating on the tile, press the auxiliary
function button on tile (10) first, the green light on
means that auxiliary function is on, then half-press
switch, begin pulse auxiliary operation. Until the glaze
of tile is broken, press the ON/OFF switch to the
bottom and begin the drilling .
3) When operating on things rather than tile, keep the
auxiliary function button closed, to insure the high
efficiency when drilling.
Note:
Auxiliary function on tile avoid the unexpected
split of tile. This auxiliary function take the place of
previous pre-drilling by glass drill on tile.
The auxiliary function on tile is only suitable to
be used under the hammer drilling position. When
operating under drilling/chiseling/ Adjust the chuck
angle mode, make sure to turn the auxiliary function
off .
8. FUNCTION MODE SELECTION (SEE FIG. D)
The operation of the gearbox for each application
is set with the function selector dial (4). To change
between functions, depress the unlocking button (a)
and rotate the selector to the desired operating mode.

10
EN
Mode for simultaneous
drilling and impacting of
concrete, Masonry
Mode for or drilling into steel,
wood and plastics
Mode for or chiseling
Mode for adjust the chuck
angle of chiseling
NOTE: Note：Select this
function mode first , adjust
the chuck angle to desired
direction. Then select the
function mode to “ ” , oper-
ate the chiseling work.
WARNING: The operating mode selector switch
may be actuated only at a standstill.
9. OVERLOAD PROTECTION
When overloaded, the motor comes to a stop. Relieve
the load on the machine immediately and allow
cooling for approx. 30 seconds at the highest no-load
speed.
10.TEMPERATURE DEPENDENT OVERLOAD
PROTECTION
When using as intended for, the power tool cannot be
subject to overload. When the load is too high or the
allowable battery temperature of 75 °C is exceeded,
the electronic control switches off the power tool until
the temperature is in the optimum temperature range
again.
11. PROTECTION AGAINST DEEP DISCHARGING
The Li-ion battery is protected against deep
discharging by the “Discharging Protection System”.
When the battery is empty, the machine is switched
off by means of a protective circuit: The inserted tool
no longer rotates.
WORKING HINTS FOR
YOUR TOOL
If your power tool becomes over heated, set the speed
to maximum and run no load for 2-3 minutes to cool
the motor. SDS-plus tungsten carbide drill bits should
always be used for concrete and masonry.
When drilling in metal, only use HSS drill bits in good
condition. Where possible use a pilot hole before
drilling a large diameter hole.
PROBLEM SOLUTION
1. REASONS FOR DIFFERENT CHARGING TIMES
Your charge time can be affected by many reasons
which are not defects in your product. If the battery
pack is only partly discharged it may be re-charged
in less than 1 hour. If the battery pack and ambient
temperature are very cold then re-charging may take
1-1.5 hours. If the battery pack is very hot it will not re-
charge because the internal temperature safety cutout
will prevent it. If the battery pack is very hot you must
remove your battery pack from the charger and allow
your battery pack to cool first to ambient temperature
and then recharging can be started. If you charge a
second battery pack immediately after the first then
the charger can be overheated. Always allow at least 15
minutes rest between battery pack charging.
2. REASONS FOR DIFFERENT BATTERY PACK
WORKING TIMES
Charging time problems, having not used a battery
pack for a prolonged time will reduce the battery pack
working time. This can be corrected after several charge
and discharge operations by charging & working with
your drill. Heavy working conditions such as large
screws into hard wood will use up the battery pack
energy faster than lighter working conditions. Do not
re-charge your battery pack below 0oC and above 30oC
as this will affect performance.
MAINTENANCE
Remove the battery pack from the tool before
carrying out any adjustment, servicing or
maintenance.
Your power tool requires no additional lubrication or
maintenance. There are no user serviceable parts in
your power tool. Never use water or chemical cleaners
to clean your power tool. Wipe clean with a dry cloth.
Always store your power tool in a dry place. Keep the
motor ventilation slots clean. Keep all working controls
free of dust. Occasionally you may see sparks through
the ventilation slots. This is normal and will not damage
your power tool.
ENVIRONMENTAL
PROTECTION
Disposal
The machine, its accessories and packaging
materials should be sorted for environmentally
friendly recycling.The plastic components are
labeled for categorized recycling.

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

9



10


C ° 75


11









HSS



1










15

2






45°C0°C













HE
5


















100%

A





SDS1







     



WORX

SDS

SDS

B2





B3





C4








C5




C6

 

 



7
1


2





3







HE
4

WU388.9 WU388.A WU388.4 WU388.2 WU388.3 WU388 WU388.1
20V 
 
 

 
  WA3596 WA3595 
    
13 


27 
24 
  

WU388.9 WU388.A WU388.4 WU388.3 WU388.2 WU388.1 WU388
1 1 1 1 1 1 1 
1 1 1 1 1 1 1 
  1
WA3924
1
WA3922
1
WA3922
1
WA3924
1
WA3924
  1

2

2

1

2
 



HE
3


















n
n

 1
 2
 3
 4
 5
 6
 7
 8
 9
 10



HE
2
 


 5
 


 


 




 




 6
 



 1

 2

 3







 1

 

 







 

 
 



 
 

 


 


 
C20 ±°C5
 


 




 




 

 

 
 
 
 
 






HE
1








 1
 

 



 


 2
 




 
 .

 


 




 



 


 3
 




.
 



 




 



 
 .


 



 


 4
 



 


 




 




 





 


 


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