Hilti DD 250-CA User manual

DD 250-CA
English 1
Français 26
Español 53
Português 81

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DD 250-CA
en Originaloperatinginstructions....................................... 1
fr Moded'emploioriginal ........................................... 26
es Manualdeinstruccionesoriginal .................................... 53
pt Manualdeinstruçõesoriginal ...................................... 81

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Original operating instructions
1 Information about the documentation
1.1 About this documentation
• Read this documentation before initial operation or use. This is a prerequisite for safe, trouble-free
handling and use of the product.
• Observe the safety instructions and warnings in this documentation and on the product.
• Always keep the operating instructions with the product and make sure that the operating instructions
are with the product when it is given to other persons.
1.2 Explanation of symbols used
1.2.1 Warnings
Warnings alert persons to hazards that occur when handling or using the product. The following signal words
are used:
DANGER
DANGER !
▶Draws attention to imminent danger that will lead to serious personal injury or fatality.
WARNING
WARNING !
▶Draws attention to a potential threat of danger that can lead to serious injury or fatality.
CAUTION
CAUTION !
▶Draws attention to a potentially dangerous situation that could lead to personal injury or damage to the
equipment or other property.
1.2.2 Symbols in the documentation
The following symbols are used in this document:
Read the operating instructions before use.
Instructions for use and other useful information
Dealing with recyclable materials
Do not dispose of electric equipment and batteries as household waste
1.2.3 Symbols in the illustrations
The following symbols are used in illustrations:
These numbers refer to the corresponding illustrations found at the beginning of these operating
instructions
The numbering reflects the sequence of operations shown in the illustrations and may deviate
from the steps described in the text
Item reference numbers are used in the overview illustrations and refer to the numbers used in
the product overview section
This symbol is intended to draw special attention to certain points when handling the product.

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1.3 Product-dependent symbols
1.3.1 "Must do" symbols
The following "must do" symbols are used:
Wear eye protection
Wear a hard hat
Wear ear protection
Wear protective gloves
Wear protective footwear
Wear light respiratory protection
1.3.2 Symbols on the product
The following symbols can be used on the product:
Analysis data
Hole-starting mode
Rated speed under no load
Alternating current
Diameter
Do not transport by crane
Bluetooth
Locking mechanism opened
Locking mechanism closed
The product supports wireless data transmission compatible with iOS and Android platforms.
Protective ground
If applied on the product, the product has been certified by this certification body for the US and
Canadian markets according to the applicable standards.

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1.4 Information notices
On the drill stand, base plate or diamond core drilling machine
On the vacuum base plate
Upper half of the image: An additional means of securing the drill stand
must be employed when the machine is used for horizontal drilling with the
vacuum securing method.
Lower half of the image: Use of the vacuum securing method without
an additional means of securing is prohibited for drilling in an upward
direction.
On the diamond core drilling machine
Use of the water collection system in conjunction with a wet-type industrial
vacuum extractor is a mandatory requirement for working overhead.
On the diamond core drilling machine
Operate the system only with a fully functional PRCD.
1.5 Product information
products are designed for professional users and only trained, authorized personnel are
permitted to operate, service and maintain the products. This personnel must be specifically informed about

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the possible hazards. The product and its ancillary equipment can present hazards if used incorrectly by
untrained personnel or if used not in accordance with the intended use.
The type designation and serial number are printed on the rating plate.
▶Write down the serial number in the table below. You will be required to state the product details when
contacting Hilti Service or your local Hilti organization to inquire about the product.
Product information
Diamond core drilling machine DD 250-CA
Generation 01
Serial no.
2 Safety
2.1 General power tool safety warnings
WARNING Read all safety warnings, instructions, illustrations and specifications provided with this
power tool. Failure to follow all instructions listed below 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.
Work area safety
▶Keep work area clean and well lit. Cluttered or dark areas invite accidents.
▶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.
▶Keep children and bystanders away while operating a power tool. Distractions can cause you to lose
control.
Electrical safety
▶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.
▶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.
▶Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the
risk of electric shock.
▶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.
▶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.
▶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.
Personal safety
▶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.
▶Use personal protective equipment. Always wear eye protection. Protective equipment such as a
dust mask, non-skid safety shoes, hard hat or hearing protection used for appropriate conditions will
reduce personal injuries.
▶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.
▶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.
▶Do not overreach. Keep proper footing and balance at all times. This enables better control of the
power tool in unexpected situations.
▶Dress properly. Do not wear loose clothing or jewellery. Keep your hair and clothing away from
moving parts. Loose clothes, jewellery or long hair can be caught in moving parts.
▶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.

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▶Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore
tool safety principles. A careless action can cause severe injury within a fraction of a second.
Power tool use and care
▶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.
▶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.
▶Disconnect the plug from the power source and/or remove the battery pack, if detachable, 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.
▶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.
▶Maintain power tools and accessories. 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.
▶Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are
less likely to bind and are easier to control.
▶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.
▶Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and
grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.
Service
▶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.
2.2 Drill safety warnings
Safety instructions for all operations
▶Hold the power tool by insulated gripping surfaces, when performing an operation where the
cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a "live"
wire may make exposed metal parts of the power tool "live" and could give the operator an electric
shock.
Safety instructions when using long drill bits
▶Never operate at higher speed than the maximum speed rating of the drill bit. At higher speeds,
the bit is likely to bend if allowed to rotate freely without contacting the workpiece, resulting in personal
injury.
▶Always start drilling at low speed and with the bit tip in contact with the workpiece. At higher
speeds, the bit is likely to bend if allowed to rotate freely without contacting the workpiece, resulting in
personal injury.
▶Apply pressure only in direct line with the bit and do not apply excessive pressure. Bits can bend
causing breakage or loss of control, resulting in personal injury.
2.3 Diamond drill safety warnings
▶When performing drilling that requires the use of water, route the water away from the operator’s
work area or use a liquid collection device. Such precautionary measures keep the operator’s work
area dry and reduce the risk of electrical shock.
▶Operate power tool by insulated grasping surfaces, when performing an operation where the
cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a “live”
wire may make exposed metal parts of the power tool “live” and could give the operator an electric
shock.
▶Wear hearing protection when diamond drilling. Exposure to noise can cause hearing loss.
▶When the bit is jammed, stop applying downward pressure and turn off the tool. Investigate and
take corrective actions to eliminate the cause of the bit jamming.
▶When restarting a diamond drill in the workpiece check that the bit rotates freely before starting. If
the bit is jammed, it may not start, may overload the tool, or may cause the diamond drill to release from
the workpiece.

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▶When securing the drill stand with anchors and fasteners to the workpiece, ensure that the
anchoring used is capable of holding and restraining the machine during use. If the workpiece is
weak or porous, the anchor may pull out causing the drill stand to release from the workpiece.
▶When securing the drill stand with a vacuum pad to the workpiece, install the pad on a smooth,
clean, non-porous surface. Do not secure to laminated surfaces such as tiles and composite
coating. If the workpiece is not smooth, flat or well affixed, the pad may pull away from the workpiece.
▶Ensure there is sufficient vacuum before and during drilling. If the vacuum is insufficient, the pad
may release from the workpiece.
▶Never perform drilling with the machine secured by the vacuum pad only, except when drilling
downwards. If the vacuum is lost, the pad will release from the workpiece.
▶When drilling through walls or ceilings, ensure to protect persons and the work area on the other
side. The bit may extend through the hole or the core may fall out on the other side.
▶When drilling overhead, always use the liquid collection device specified in the instructions. Do
not allow water to flow into the tool. Water entering the power tool will increase the risk of electric
shock.
2.4 Additional safety instructions
Personal safety
▶Do not tamper with or attempt to make alterations to the machine.
▶The machine is not intended for use by debilitated persons who have received no special training.
▶Keep the machine out of reach of children.
▶Do not touch rotating parts. Switch the machine on only after it is in position at the workpiece.
Touching rotating parts, especially rotating accessory tools, can result in injury.
▶Avoid skin contact with drilling slurry.
▶Dust from materials such as lead-based paint, certain types of wood and concrete/masonry/stone
containing quartz, and minerals or metal can be harmful to health. Contact with or inhalation of the
dust can cause allergic reactions and/or respiratory or other diseases among operators or bystanders.
Certain kinds of dust such as oakwood and beechwood dust are classified as carcinogenic, especially
in conjunction with additives for wood conditioning (chromate, wood preservative). Only specialists are
permitted to handle material containing asbestos. Use as effective a dust removal system as possible.
To achieve a high level of dust collection, use a suitable vacuum extractor of the type recommended by
Hilti for wood dust and/or mineral dust and which is designed for use with this power tool. Make sure
that the workplace is well ventilated. It is advisable to wear a dust mask appropriate for the type of dust
generated. Comply with national regulations applicable to the materials you will be working with.
▶The diamond core drilling machine and the diamond core bit are heavy. There is a risk of crushing parts
of the body. The user and persons in the vicinity must wear suitable protective goggles, a hard hat,
ear defenders, protective gloves and protective footwear while the machine is in use.
Power tool use and care
▶Make sure that the machine is correctly secured to the drill stand.
▶Always make sure that an end stop is installed on the drill stand as otherwise the safety-relevant
end-stop function is not implemented.
▶Check that accessory tools are compatible with the machine’s chuck/drive system and that they
are installed and secured correctly.
Electrical safety
▶Do not use extension cords with multiple power outlets powering two or more devices in operation
at the same time.
▶Operate the machine only when it is connected to an adequately rated power supply with a ground
conductor.
▶Before beginning work, check the working area (e.g. using a metal detector) to ensure that no
concealed electric cables or gas and water pipes are present. External metal parts of the machine
can become live, for example if you inadvertently damage electric wiring. This constitutes a serious risk
of electric shock.
▶Make sure that the supply cord cannot be damaged as the carriage advances.
▶Never operate the machine without the accompanying PRCD (machines without PRCD: Never
operate the machine without an isolating transformer). Test the PRCD each time before use.
▶Check the machine’s supply cord at regular intervals and have it replaced by a qualified specialist if
found to be damaged. If the machine’s supply cord is damaged it must be replaced with a specially
prepared and approved supply cord available from Hilti Customer Service. Check extension cords
at regular intervals and replace them if found to be damaged. Do not touch the supply cord or

*2279864* 2279864 English 7
extension cord if it is damaged while working. Disconnect the supply cord plug from the power
outlet. Damaged supply cords or extension cords present a risk of electric shock.
▶Never operate the machine when it is dirty or wet. Dust, especially dust from conductive materials,
or dampness on the surface of the power tool can, under unfavorable conditions, lead to electric shock.
Have dirtied or dusty power tools checked at regular intervals by Hilti Service, especially if they are used
frequently for working on conductive materials.
▶Whenever you operate the diamond core drilling machine without DD AF-CA H, always install the
cover over the AC supply for the DD AF-CA H. Water entering the power tool will increase the risk of
electric shock.
Workplace
▶Approval must be obtained from the site engineer or architect prior to beginning drilling work.
Drilling work on buildings and other structures may influence the static equilibrium of the structure,
especially when steel reinforcing bars or load-bearing components are cut through.
▶If the drill stand has not been fastened correctly, always move the machine mounted on the drill
stand all the way down in order to prevent the stand from falling over.
▶Keep the supply cord, extension cord, water hose and vacuum hose away from rotating parts of
the machine.
▶Use of the water collection system in conjunction with a wet-type industrial vacuum extractor is a
mandatory requirement for wet drilling overhead.
▶Use of the vacuum securing method without an additional means of fastening is prohibited for
drilling in an upward direction.
▶An additional means of securing the drill stand must be employed when the machine is secured
with the vacuum securing method (accessory) for horizontal drilling.
3 Description
3.1 Product overviews
3.1.1 Diamond core drilling machine DD 250-CA 1
@Multifunction display
;Hole-starting mode operating button
=Analysis data operating button
%Rating plate
&On/off switch
(Supply cord cover
)AC supply for DD AF-CA H (accessory)
+Supply cord with PRCD
§Water connection
/Carrying handle (2x)
:Carbon brush cover (2x)
∙Water flow regulator
$Chuck
£Gear selector
3.1.2 Drill stand DD-HD 30 2
@Jack screw (accessory)
;Cover
=Rail
%Leveling screw (3x)
&Hole center indicator
(Anchor
)Base plate
+Rating plate
§Clamping spindle
/Clamping nut
:Brace
∙Carrying handle
$End stop screw
£Depth gauge (accessory)
|Wheel assembly mount
¡Water collector holder (accessory)
QSeal (accessory)

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WWater collector (accessory) ESealing washer for water collector (acces-
sory)
3.1.3 Carriage DD-HD 30 3
@Hand wheel sleeve 1:1
;Hand wheel sleeve 1:3
=Eccentric pin (for locking the diamond core
drilling machine)
%Shear pin
&Hand wheel
(Leveling indicator (2x)
)Carriage lock
+Supply cord guide
§Adapter interface for DD AF-CA H
/Carriage play adjusting screw (4x)
3.1.4 Vacuum base plate (accessory) 4
@Vacuum release valve
;Vacuum hose connector
=Wheel assembly mount
%Pressure gauge
&Vacuum seal
(Leveling screw (4x)
3.2 Intended use
The product described is an electrically powered diamond core drilling machine. It is designed for the rig-
based wet drilling of through-holes and blind holes in (reinforced) mineral materials. Hand-held use of the
diamond core drilling machine is not permitted.
▶Always use a drill stand when using the diamond core drilling machine. The drill stand must be sufficiently
anchored in the base material by an anchor base plate or vacuum base plate.
▶Do not use a hammer or other heavy object to adjustment the base plate.
▶Operate the tool only when it is connected to a power source providing a voltage and frequency in
compliance with the information stated on the rating plate.
▶Comply with the safety rules and operating instructions for the accessories used.
3.3 Bluetooth®
This product has Bluetooth.
Bluetooth is a wireless data transfer system by which the two Bluetooth-enabled products can communicate
with each other over a short distance.
To ensure a stable Bluetooth connection there must be a clear line of sight between the connected devices.
Bluetooth functions of this product
Consult the operating instructions of the paired device for detailed descriptions of the Bluetooth functions.
• Service and status messages of the paired Hilti devices are shown on the display of the diamond core
drilling machine.
• Connection with a mobile terminal device via the Hilti Connect app for service functions and for
transmission of product-related analysis data.
Switching Bluetooth on or off
Hilti products ship ex-works with Bluetooth deactivated. Bluetooth switches itself on automatically
during initial operation.
•To switch off, press and hold down the buttons and simultaneously for at least 10 seconds.
•To switch on, press the buttons and simultaneously.
Connecting products
The pairing with a Bluetooth-compatible Hilti device is sustained until the diamond core drilling machine is
paired to another Hilti device of the same type or Bluetooth is switched off. Pairing is also sustained even
when the products are switched off and then on again; paired products always automatically re-establish
their paired connection.
• To pair with a Bluetooth-compatible Hilti device or mobile device, with Bluetooth switched on simulta-
neously press the and buttons.
The time window for pairing with a Bluetooth-compatible Hilti device is 2 minutes. When the 2 minutes
have expired, the connection process will be canceled.

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License
The Bluetooth®word mark and the logo are registered trademarks and the property of Bluetooth SIG, Inc.
and Hilti has been granted a license to use these trademarks.
3.4 Display symbols and explanation of the multifunction display on the diamond core drilling
machine
For the following information to be displayed, the diamond core drilling machine must be ready for operation
(plugged in and PRCD switched on).
The displays may vary depending on the gear selection and the type of application.
Start screen
The start screen is displayed when the diamond core drilling machine is
supplied with power. The Bluetooth status, the personalized name and the
serial number of the diamond core drilling machine are shown on the start
screen.
• You can change the product name that appears on the screen in the
Hilti Connect app (default: 'Your name here').
Spirit level
The diamond core drilling machine is not switched on. The display helps
you to level the system and to align the drill stand when drilling at an angle.
The display shows the alignment of the diamond core drilling machine
symbolically and in degrees.
• Angular accuracy at room temperature: ±2°
Gear indicator
The diamond core drilling machine is running under no load. The display
helps ensure that the gear engaged is suitable for the diamond core bit
used. At top left, the display shows the gear engaged and in the center,
the recommended core bit diameter range in millimeters and inches for this
gear.
Hole-starting mode is
active
The diamond core drilling machine is switched off or running under no load.
This function makes it possible to start holes with low vibration when using
large-diameter core bits. This function can be deactivated at any time by
pressing the button again.
• This information is shown in the display only for a few seconds.
Remaining running time in
hole-starting mode
The diamond core drilling machine is drilling and the hole-starting mode is
active. The display shows the time remaining until the diamond core drilling
machine automatically switches off.
• To protect the diamond core drilling machine, hole-starting mode is
switched off automatically after a maximum of 2 minutes.
The reading subsequently disappears from the display.
Hole-starting mode deacti-
vated
Hole-starting mode has been deactivated. Speed and power of the dia-
mond core drilling machine increase and drilling can proceed
• This information is shown in the display only for a few seconds.
Hole-starting mode cannot
be activated
The diamond core drilling machine is drilling. The button for activating hole-
starting mode was pressed while the diamond core drilling machine was
under load or was in cool-down mode.
• This information is shown in the display only for a few seconds.

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Drilling performance
indicator: Contact pressure
is too low
The diamond core drilling machine is drilling and the hole-starting mode
is not activated. The information displayed helps ensure that the diamond
core drilling machine is being operated in the optimal range.
• Background color: Yellow.
Contact pressure is too low. Increase the contact pressure.
Drilling performance
indicator: Optimum contact
pressure
The diamond core drilling machine is drilling and the hole-starting mode is
not active. The information displayed helps ensure that the diamond core
drilling machine is being operated in the optimal range.
• Background color: Green.
Contact pressure is at the optimum level.
For 120 V
Rated current limit has
been exceeded
The diamond core drilling machine is drilling and the hole-starting mode is
not activated. Rated current has exceeded the limit of 20 A.
• Contact pressure is too high. Reduce the contact pressure.
Drilling performance
indicator: Contact pressure
is too high
The diamond core drilling machine is drilling and the hole-starting mode
is not activated. The information displayed helps ensure that the diamond
core drilling machine is being operated in the optimal range.
• Background color: Red.
Contact pressure is too high. Reduce the contact pressure.
Status bar for information
The status bar displays various information regarding the machine’s current
status, such as the gear engaged or the activated hole-starting mode.
Status bar for warning
messages
The status bar displays various warnings regarding the tool's current
status which do not result in the diamond core drilling machine stopping
immediately.
Bluetooth ON
Bluetooth is activated in the basic setting.
To switch off the Bluetooth function, press and hold down the buttons
and simultaneously for 10 seconds with the motor switched off.
• This information is shown in the display only for a few seconds.
Bluetooth OFF
Bluetooth is deactivated. The diamond core drilling machine cannot be
connected to additional device or accessories.
To switch on the Bluetooth function, press the buttons and simulta-
neously with the motor switched off.
• This information is shown in the display only for a few seconds.

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Connection has been
established
The diamond core drilling machine is ready to connect to another device or
accessory.
To start the process of establishing the connection, simultaneously press
the and buttons and hold them down for at least 1 second.
• The time frame for the connection to another device is 2 minutes. When
the 2 minutes have expired, the connection process will be canceled.
The paired connection between another device or accessory and the
diamond core drilling machine is sustained until:
• The diamond core drilling machine is paired to a device or accessory of
the same type.
• Bluetooth is switched off.
Connection interrupted
An existing Bluetooth connected to a device or accessory has been inter-
rupted.
Analysis of running time
The display shows drilling time (diamond core drilling machine actually
drilling) at the top and operating hours (diamond core drilling machine
switched on) at the bottom. Both figures are shown in hours, minutes and
seconds.
To reset drilling time and all other analysis data, press the button and
hold it down for a few seconds.
• The information shown on the display disappears automatically after a
few seconds or when you press the button.
•Pressing the again takes you to the next analysis data.
Analysis of operating
behavior
This display shows contact pressure during drilling time as a percentage
(%). This enables user behavior to be optimized.
• The information shown on the display disappears automatically after a
few seconds or when you press the button.
•Pressing the again takes you to the next analysis data.
Analysis of drilling direction
This display shows an evaluation of the drilling directions in %.
• The information shown on the display disappears automatically after a
few seconds or when you press the button.
•Pressing the again takes you to the next analysis data.
Analysis of gear selection
This display shows an evaluation of the duration of use of the respective
gear in %. The arrow always points to the gear with the highest rate of use.
• The information shown on the display disappears automatically after a
few seconds or when you press the button.
•Pressing the again takes you to the next analysis data.
Analysis of use
This reading shows use of the diamond core drilling machine in manual
mode and with use of an AF-CA in %.
• The information shown on the display disappears automatically after a
few seconds or when you press the button.
•Pressing the again takes you to the next analysis data.
Connected devices
This display provides an overview of all devices and accessories connected
to the diamond core drilling machine.
• The information shown on the display disappears automatically after a
few seconds or when you press the button.
•Pressing the again takes you to the next analysis data.

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Start connection setup
Start connection setup process at the diamond core drilling machine first
and then at the device or accessory you want to connect.
To start the process of establishing the connection, simultaneously press
the and buttons and hold them down for at least 1 second.
• The information shown on the display disappears automatically after a
few seconds or when you press the button.
•Pressing the again takes you to the next analysis data.
Gear selector not latched
The gear selector is in an intermediate position or is not correctly latched.
Operate the gear selector until it latches completely.
Restart interlock
Maximum running time with hole-starting mode active has been exceeded;
Fault in the power supply; The diamond core drilling machine has been
overloaded; Overheated, water has entered the motor or the cooling run-
ning time has ended.
Switch of the power tool is in Iposition while connection to the power
supply being established.
Fault in the power supply
(voltage too low)
Undervoltage occurred in the supply network. In the event of undervoltage,
the diamond core drilling machine cannot be operated at full power.
• This information is shown in the display for a few seconds.
Overheating
The diamond core drilling machine has overheated and has switched off
or is in the cooling mode. The indicator displays the time remaining until
cooling down. If the diamond core drilling machine is still too hot after this
time has elapsed, the remaining running time starts from the beginning
again.
Time remaining until the
carbon brushes must be
replaced
The motor of the diamond core drilling machine is running and the carbon
brush wear limit has almost been reached. The indicator displays the
time remaining until the carbon brushes need to be replaced. The time
remaining until the diamond core drilling machine automatically switches
off is displayed in hours and minutes.
• This information is shown in the display for a few seconds.
Service display
The carbon brushes are worn and have to be replaced.
Running in after the car-
bon brushes have been
replaced
The motor of the diamond core drilling machine is running. The carbon
brushes have been changed and must be run in by letting the machine run
under no load for at least 1 minute without interruption, in order to achieve
the optimum service life.
• The indicator shows the time remaining until the run-in process has been
completed.
3.5 Items supplied
Diamond core drilling machine, operating instructions.
Other system products approved for use with this product can be found at your local Hilti Store or at:
www.hilti.group