DD AF-CA
Operating instructions
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Mode d’emploi
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Manual de instrucciones
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ORIGINAL OPERATING INSTRUCTIONS
DD AF-CA drilling feed unit
It is essential that the operating instructions are read before the appliance is operated for the first time.
Always keep these operating instructions to-gether with the appliance.
Ensure that the operating instructions are with the appliance when it is given to other persons. Contents Page 1 General information 1 2 Description 2 3 Technical data 4 4 Safety instructions 4 5 Setting up 6
6 The core drilling operation 7
7 Disassembly, transport and storage 8
8 Care and maintenance 8
9 Troubleshooting 9
10 Disposal 11
11 Manufacturer’s warranty 11
1These numbers refer to the illustrations. You can
find the illustrations at the beginning of the operating instructions.
In these operating instructions, the designation “drilling feed unit” always refers to the DD AF-CA drilling feed unit.
Drilling feed unit on the core drilling system 1
@
Water regulation valve on the core drilling machine;
Hose connection to the core drilling machine=
Water supply connection%
Drilling feed unit&
Control panel and display(
Drill stand)
Connector for electric power and communication+
Core drilling machineControl panel with controls and indicators 2
@
Emergency stop;
Service LED=
Manual mode button and LED%
Button and LEDs for Cut Assist mode and powerregulation
&
Positioning buttons with LED1 General information
1.1 Safety notices and their meaning DANGER
Draws attention to imminent danger that will lead to serious bodily injury or fatality.
WARNING
Draws attention to a potentially dangerous situation that could lead to serious personal injury or fatality.
CAUTION
Draws attention to a potentially dangerous situation that could lead to slight personal injury or damage to the equipment or other property.
NOTE
Draws attention to an instruction or other useful informa-tion.
1.2 Explanation of the pictograms and other information Warning signs General warning Obligation signs Read the operating instructions before use.
en
Symbols
Service
indicator materials forReturn recycling
Alternating
current speed underNominal no load
Diameter Revolutions
per minute Revolutionsper minute
Location of identification data on the appliance
The type designation and serial number can be found on the type identification plate on the appliance. Make a note of this data in your operating instructions and always refer to it when making an enquiry to your Hilti representative or service department.
Type: Generation: 01 Serial no.:
2 Description
2.1 Use of the product as directed
The drilling feed unit together with the core drilling machines and drill stands recommended by Hilti form an automatic core drilling system suitable for wet core drilling in mineral materials.
The drilling feed unit must always be mounted on the drill stand when the unit is in operation. The drill stand must alway be secured using the anchor spindle and a suitable anchor.
When the drilling feed unit is used, the drill stand must be securely fastened to the working surface with an anchor. When in operation, the drilling feed unit must be connected to a cooling water supply that meets the minimum specifications given in the technical data.
The drilling feed unit has been designed and manufactured in accordance with IP55 and is thus protected against sprayed water. This allows drilling to be carried out without use of a wet-type industrial vacuum cleaner.
Observe the safety rules and operating instructions for the accessories used. Observe the national health and safety requirements.
The machine or appliance, accessories and cutting tools may present hazards when handled incorrectly by untrained personnel or when used not as directed.
NOTE
In addition to these operating instructions, the information given in the operating instructions for the other components of the core drilling system must always be observed.
DANGER
Use only the genuine Hilti accessories or ancillary equipment listed in the operating instructions. Use of accessories or ancillary equipment not listed in the operating instructions may present a risk of personal injury.
2.2 Control panel and display
The control panel and display incorporates the emergency stop button as well as buttons and LEDs with controlling and monitoring functions.
2.3 Operating controls and indicators
Emergency stop button Emergency stop Pressing the emergency stop button
stops the drilling operation. The core drilling system is still under electric power but operation can be resumed only after the emergency stop button has been released.
Releasing the emergency
stop button Turn and pull out the emergency stopbutton and press the “Off” switch on
the core drilling machine. Operation of the core drilling system can then be re-sumed.
Service indicator Service LED blinks red Malfunction that can be remedied, e.g.
overheating; see Troubleshooting sec-tion.
Service LED lights red Disconnect the system from the electric
supply and then reconnect; see Trou-bleshooting section.
Mode indicator Manual mode LED on Manual control using the hand wheel is
active.
Manual mode LED off Cut Assist is active.
Button for manual mode Manual mode is activated by pressing the hand wheel button. In manual
mode the water is free to flow. Water from the water supply flows out through the core bit. Manual mode is deactivated by pressing the Cut Assist button.
Cut Assist / power control button After switching over from manual mode, Cut Assist is activated with full
power available. Pressing the Cut Assist button repeatedly switches the unit to the medium power setting, then to the low power setting and fi-nally back to full power. Cut Assist starts the cooling water flow only when drilling begins and stops the water automatically when the end of the drilling operation is detected. The manual mode button deactivates Cut Assist.
Cut Assist power indicator Three LEDs on Full power (preselected after switching
on)
Two LEDs on Medium power (approx. 85 %)
One LED on Low power (approx. 65 %)
Carriage positioning buttons These two buttons are active only when in Cut Assist mode and are used
exclusively to position the carriage, for example when fitting a core bit. The hand wheel must be removed when using Cut Assist mode.
LEDs for carriage positioning LED on Cut Assist is active, the carriage can be
positioned using the arrow buttons.
LED off Cut Assist is not active, the carriage
must be positioned using the hand wheel, or automatic drilling is in progress
2.4 Items supplied
1 DD AF-CA drilling feed unit 1 Securing screw
1 Operating instructions 1 Cardboard box
NOTE
Accessories not supplied with the machine are available from your Hilti Center or can be ordered online at
www.hilti.com.
3 Technical data
Right of technical changes reserved.
Rated voltage 240 V 480 V
Rated frequency 50…60 Hz 50…60 Hz
Rated current input 0.4 A 0.25 A
Output voltage [DC] 5 V
Output current 50 mA
Speed of rotation 0…75/min
Highest permissible water supply pressure Max. 6 bar (Max. 87.02 psi)
Minimum water flow rate per minute Min. 0.5 l (Min. 0.13 gal) (water temperature: Max.
+30°C (Max. +86 °F))
Dimensions (L × W × H) 361 mm (14.21") × 193 mm (7.6") × 133 mm (5.24")
Weight, ready for use 4.5 kg (9.92 lb)
Protection class I (grounded)
Protected against dust and water IP55
4 Safety instructions
4.1 General Power Tool Safety Warnings
a) WARNING
Read all safety warnings and 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.
4.1.1 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
atmo-spheres, 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
operat-ing a power tool. Distractions can cause you to lose
control.
4.1.2 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.
Un-modified 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
condi-tions. 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.
4.1.3 Personal safety
a) Stay alert, watch what you are doing and use
common sense when operating a power tool. Do
en
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
turn-ing the power tool on. A wrench or a key left
at-tached to a rotating part of the power tool may result in personal injury.
e) Do not overreach. Keep proper footing and
bal-ance 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.
4.1.4 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
chil-dren 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 main-tained 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
opera-tions different from those intended could result in a hazardous situation.
4.1.5 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.
4.2 Proper organization of the workplace
a) 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 statics of the structure, especially when steel reinforcing bars or load-bearing components are cut through.
b) When drilling through walls, cover the area behind
the wall, as material or the core may fall out on the other side of the wall. When drilling in a downward direction, cordon off or cover the area below as drilled material or the core may drop out and fall down.
c) Wear respiratory protection if the work causes
dust.
d) It is recommended that rubber gloves and
non-skid shoes are worn when working outdoors.
e) Keep the supply cord, extension cord, suction
hose and vacuum hose away from rotating parts.
f) Do not work from a ladder.
4.2.1 General safety measures
a) Tampering with or modification of the drilling feed unit, drill stand and accessories is strictly prohibited. b) Keep the grips dry, clean and free from oil and
grease.
c) Never leave the appliance unattended.
d) Store appliances in a secure place when not in
use.When not in use, appliances must be stored in
a dry, high place or locked away out of reach of children.
e) Children must be instructed not to play with the
appliance.
f) This appliance is not intended for use by
per-sons (including children) with reduced physical, sensory or mental capabilities, or lack of experi-ence and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
g) Check the appliance and its accessories for any
damage. Guards, safety devices and any slightly damaged parts must be checked carefully to en-sure that they function faultlessly and as intended. Check that moving parts function correctly with-out sticking and that no parts are damaged. All parts must be fitted correctly and fulfill all condi-tions necessary for correct operation of the appli-ance. Damaged guards, safety devices and other parts must be repaired or replaced properly at an
authorized service center unless otherwise indi-cated in the operating instructions.
h) Avoid skin contact with drilling slurry.
i) Wear a protective mask during work that
gener-ates dust, e.g. dry drilling. Connect a dust removal system. Drilling into materials hazardous to the health (e.g. asbestos) is not permissible.
j) Dust from material such as paint containing lead, some wood species, minerals and metal may be harmful. Contact with or inhalation of the dust may cause allergic reactions and/or respiratory diseases to the operator or bystanders. Certain kinds of dust are classified as carcinogenic such as oak and beech dust especially in conjunction with additives for wood conditioning (chromate, wood preservative). Material containing asbestos must only be treated by special-ists. Where the use of a dust extraction device is
possible it shall be used. To achieve a high level of dust collection, use a suitable vacuum cleaner of the type recommended by Hilti for wood dust and/or mineral dust together with this tool. Ensure that the workplace is well ventilated. The use of a dust mask of filter class P2 is recommended. Fol-low national requirements for the materials you want to work with.
4.2.2 Mechanical
a) Follow the instructions concerning care and
main-tenance.
b) Follow the instructions concerning lubrication
and changing core bits.
c) Check that the core bits used are compatible with
the chuck system and that they are secured in the chuck correctly.
d) Check that the drilling feed unit is correctly and
securely mounted on the drill stand.
e) Do not touch rotating parts.
f) Check that all the clamping screws are correctly
tightened.
g) Make sure that the cover with built-in end stop
is always fitted to the drill stand. The safety-relevant end-stop function becomes inoperative if this component is not fitted.
4.2.3 Electrical
a) Check the appliance’s supply cord at regular
in-tervals and have it replaced at a Hilti service center if damage is found. Check extension cords at regular intervals and replace them if damage is found.
b) Do not touch the supply cord or extension cord if
they are damaged while working. Disconnect the supply cord plug from the power outlet.
c) In case of an interruption in the electric supply:
Switch off the machine and/or appliance and un-plug the supply cord.
d) Avoid using extension cords with multiple power
outlets and the simultaneous use of several ap-pliances connected to one extension cord.
e) Never operate the appliance when it is dirty or
wet. Dust (especially dust from conductive ma-terials) or dampness adhering to the surface of the appliance may, under unfavorable conditions, lead to electric shock. Dirty or dusty appliances should thus be checked at a Hilti service center at regular intervals, especially if used frequently for working on conductive materials.
f) 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 appliance
may become live, for example, when an electric cable is damaged accidentally. This presents a serious risk of electric shock.
5 Setting up
5.1 Mounting the drilling feed unit on the carriage on the drill stand 3
CAUTION
While setting up the drilling feed unit, the core drilling machine must be disconnected from the electric supply.
CAUTION
The supply voltage must comply with the specification given on the type identification plate. The drilling feed unit may be connected only to the core drilling machines recommended by Hilti for operation in this way.
DANGER
Make sure that the drilling feed unit is correctly mounted and secured on the drill stand.
NOTE
Check that the carriage is of the type suitable for use with an automatic feed unit: At the position of the mounting
screw there must be a hole that allows the mounting screw to be pushed through.
Mount the drilling feed unit as follows:
1. Use the hand wheel to position the carriage so that the drilling feed unit can be mounted conveniently. 2. Lock the carriage.
3. Bring the drilling feed unit into position on the car-riage and hold it there.
4. If the drilling feed unit does not fit evenly against the drill stand, unlock the carriage and turn the hand wheel slightly until the drilling feed unit makes full contact with the carriage.
5. Insert the fastening screw through the carriage and into the drilling feed unit.
6. Screw the fastening screw into the drilling feed unit and tighten it by hand.
7. Remove the hand wheel.
8. Connect the water hose that runs to the core drilling machine.
9. Connect the water supply to the drilling feed unit. 10. Remove the protective caps from the connector and
the connecting cable.
11. CAUTION Connect a 110 volt drilling feed unit only to a 110 volt core drilling machine.
Connect the connecting cable for the drilling feed unit to the connector on the core drilling machine. 12. Fit the protective caps into each other in order to
keep them clean.
5.2 Providing water cooling NOTE
Both the drilling feed unit and the core drilling ma-chine are water cooled devices.
Before operating the equipment, always check that a water hose is correctly connected to the water input connector for the drilling feed unit cooling circuit. This also applies when carrying out dry drilling applications. Check that the minimum water flow rate meets at least the requirements given in the technical data.
6 The core drilling operation
NOTE
Switching other power tools or appliances on and off may cause undervoltage and / or overvoltage peaks, resulting in damage to the power tool or appliance. Never operate other power tools or appliances from the generator or transformer at the same time.
DANGER
Failure to keep clear of the danger area may result in a risk of crushing or cutting injury.
The drilling feed unit is always in Cut Assist mode imme-diately after switching on and starts drilling automatically as soon as the switch on the core drilling machine is operated. When the drilling operation is started, the core bit is moved toward the working surface. There is a risk of injury in the vicinity of the core drilling machine, the core bit and at the point where the hole is to be drilled. Before switching on the core drilling machine, check that no persons are within the danger area.
WARNING
There is a risk of crushing or cutting injury when the core drilling system contacts the working surface with the core bit.
Keep everything clear of the area between the core bit and the working surface.
CAUTION
The emergency stop button does not function if the drilling feed unit is not connected to the core drilling machine.
Do not carry out manual core drilling when the drilling feed unit is fitted but not connected.
Remove the drilling feed unit when it is not connected to the core drilling machine or, alternatively, connect it to the core drilling machine.
6.1 Working principle
In Cut Assist mode, the core drilling operation begins with the core bit being moved (drilling feed movement) towards the surface in which the hole is to be drilled. The core bit does not rotate while this is taking place. As soon as the core bit contacts the surface it is retracted a short distance. The core bit then begins to rotate slowly (starting speed). The system switches on the water supply
and drills at low speed until adequate hole-starting depth is reached.
Once the required starting depth has been reached the system continues drilling at the optimum speed and with optimum power. The Iron Boost function is activated automatically when the core bit contacts a reinforcing bar, thereby adjusting the power output for optimum performance while cutting through the reinforcement. Thin, weak reinforcing bars may not be detected by the drilling feed unit, in which case the Iron Boost function will not be activated. This has only a very slight effect on drilling performance.
When drilling a blind hole (not all the way through), the drilling feed unit stops the advance movement as soon as the carriage contacts the depth gauge.
NOTE
When through holes are drilled without using a depth gauge, the core bit feed movement continues until the core bit projects approx. 3 cm beyond the through hole exit.
At the end of the drilling operation the core bit should be retracted so that just the tip of the core bit remains in the hole, and the water flow then switched off.
6.2 Drilling using Cut Assist mode WARNING
The rotating hand wheel presents a risk of injury! Remove
the hand wheel from the carriage before you begin drilling using CutAssist.
NOTE
If you press the Iron Boost button on the core drilling machine while using Cut Assist mode, automatic power regulation when drilling through reinforcing bars will be deactivated. As a result, until the end of the drilling operation, you will then have to regulate the drilling power manually when drilling through reinforcing bars. To drill a hole automatically using Cut Assist, proceed as follows:
1. Start the water flow by pressing the manual mode button and then wait until water flows out at the core bit.
2. Activate the Cut Assist mode.
3. If necessary, adjust drilling power by pressing the Cut Assist button.
NOTE For more information about controlling drilling
power, please refer to the section describing the controls and indicators.
4. Start the drilling operation as described in the oper-ating instructions for the core drilling machine. 5. End the drilling operation as described in the
oper-ating instructions for the core drilling machine.
6.3 Drilling in manual mode
1. Press the manual mode button on the drilling feed unit.
This starts the water flowing, i.e. water flows through the cooling circuit for the core drilling machine and flows out through core bit.
2. Carry out the manual drilling operation as described in the operating instructions for the core drilling machine.
6.4 Breaks between work and storage at low temperatures
DANGER
At temperatures below 4°C (39°F) the water in the cooling circuit must be blown out with compressed air when drilling is interrupted for more than on hour or before the equipment is stowed away.
In order to drain the water circuit the core drilling machine must be connected to the electric supply and to the drilling feed unit.
1. Disconnect the water supply from the drilling feed unit.
2. Open the water regulation valve on the core drilling machine.
3. Set the 3-way valve on the core drilling machine to “Wet drilling”.
4. Activate manual mode on the drilling feed unit in order to allow the water to flow.
5. Use compressed air (max. 3 bar) to blow the water out of the water circuit.
7 Disassembly, transport and storage
7.1 Dismantling the drilling feed unit 4
The drilling feed unit can be dismantled independently of the core drilling machine.
Dismantle the drilling feed unit as follows:
1. Separate the protective caps for the connecting cable and connector, which are fitted into each other.
2. Unplug the connecting cable for the drilling feed unit from the connector on the core drilling machine. 3. Fit the protective caps to the connecting cable and
to the connector.
4. Disconnect the water hose that runs to the core drilling machine.
5. Lock the carriage.
6. Secure the drilling feed unit to prevent it falling and, at the same time, release the fastening screw. 7. Remove the drilling feed unit and lay it down in a
safe place.
7.2 Transport and storage
Open the water flow regulator before putting the core drilling machine into storage.
CAUTION
When temperatures drop below freezing point, check to ensure that no water remains in the core drilling system.
DANGER
Transport the drilling feed unit, core drilling machine, drill stand and core bit as separate units.
Use the wheel assembly (accessory) as an aid when transporting the equipment.
8 Care and maintenance
CAUTION
Unplug the core drilling machine’s supply cord from the power outlet.
8.1 Care of the appliance CAUTION
Keep the appliance, especially its grip surfaces, clean and free from oil and grease. Do not use cleaning agents which contain silicone.
Clean the outside of the appliance at regular intervals with a slightly damp cleaning cloth. Do not use spray systems, steam pressure cleaning systems or high-pressure water jet systems when cleaning. This may negatively affect the electrical safety of the appliance.
8.2 Care of core bits and metal parts
Remove any dirt adhering to the surface of core bits, the chuck and drive spindle and protect their surfaces from corrosion by rubbing them with an oily cloth from time to time.
8.3 Maintenance WARNING
Repairs to the electrical section of the appliance may be carried out only by trained electrical specialists.
Check all external parts of the drilling feed unit for damage at regular intervals and check that all controls operate faultlessly. Do not operate the drilling feed unit if parts are damaged or when the controls do not function faultlessly. Repairs should be carried out by Hilti Service.
8.4 Checking the appliance after care and maintenance
After carrying out care and maintenance, check that all protective and safety devices are fitted and that they function faultlessly.
9 Troubleshooting
Fault Possible cause Remedy
The cable cannot be connected
to the core drilling machine. The plug connector is dirty. Unplug the core drilling machine fromthe power outlet.
Clean the plug connector.
Without using force, try again to plug in the connector.
The plug connector or cable is
defec-tive. Contact Hilti Service.
The drilling feed unit can’t be
fitted. The bushing for the fastening screw isclogged or obstructed. Clean the threaded bushing
The thread on the fastening screw or
in the hole is defective. Contact Hilti Service.
The cable is damaged. Contact Hilti Service.
The LEDs on the drilling feed unit don’t light when the but-ton on the PRCD for the core drilling machine is pressed.
The connector is faulty. Unplug the core drilling machine from
the power outlet.
Check the connector between the drilling feed unit and the core drilling machine.
If the cable or connector are faulty, return the unit to Hilti Service.
The plug connector is dirty. Unplug the core drilling machine from
the power outlet.
Check the plug connection between the drilling feed unit and the core drilling machine.
If the cable or connector are faulty, return the unit to Hilti Service.
Faulty connecting cable. Unplug the core drilling machine from
the power outlet.
Check the plug connection between the drilling feed unit and the core drilling machine.
If the cable or connector are faulty, return the unit to Hilti Service. The hand wheel cannot be
ro-tated. The carriage is locked.The carriage is obstructed. Unlock the carriage.Make sure that the carriage is free to
move.
Fault Possible cause Remedy
The hand wheel cannot be
ro-tated. The gearing section of the drillingfeed unit is defective. Contact Hilti Service.
The carriage gearing is defective. Contact Hilti Service.
The service LED blinks. Fault that can be remedied (e.g.
emergency stop button pressed in, overheating, communication error).
1.) Release the emergency stop but-ton.
2.) If overheating occurs, allow the machine to cool down.
3.) Check the connecting cable. 4.) Acknowledge and cancel the error status by pressing the “Off” switch on the core drilling machine.
The service LED lights
con-stantly. Critical error or fault. Unplug the core drilling machine fromthe power outlet, wait 5 seconds, and
then plug it in again.
Contact Hilti Service if the service in-dicator LED continues to light.
The water flow rate is too low. The core drilling machine water valve
is blocked or defective. Check that the water supply is in-stalled correctly.
Check whether the valve is blocked or defective.
Contact Hilti Service. The drilling feed unit solenoid valve is
blocked or defective. Check that the water supply is in-stalled correctly.
Check whether the valve is blocked or defective.
Contact Hilti Service. Water drips from the casing of
the drilling feed unit. The water circuit is defective. First disconnect the core drilling ma-chine from the electric supply.
Disconnect the system from the water supply.
Contact Hilti Service.
The solenoid valve is defective. First disconnect the core drilling
ma-chine from the electric supply. Disconnect the system from the water supply.
Contact Hilti Service. The drilling feed unit motor runs
but the carriage doesn’t move. The drilling feed unit is fitted incor-rectly. Check the mechanical connectionbetween the drilling feed unit and the
carriage. The gearing section of the drilling
feed unit is defective. Contact Hilti Service.
The carriage gearing is defective. Contact Hilti Service.
Cut Assist mode cannot be
acti-vated. The plug connector for the coredrilling machine is faulty. Check the plug connection.
The motor is defective. Contact Hilti Service.
The gearing is defective. Contact Hilti Service.
The electronics are defective. Contact Hilti Service.
The switch is defective. Contact Hilti Service.
The emergency stop button is
pressed in. Release the emergency stop button.
The drilling operation slows or
stops. The core bit is defective (segmentspolished or damaged). Sharpen or replace the core bit.
Fault Possible cause Remedy
The drilling operation slows or
stops. The plug connection is faulty or thecable is defective. Check the connection between thedrilling feed unit and the core drilling
machine.
If the cable is faulty, return the unit to Hilti Service.
The core bit is stuck. Disconnect the core drilling machine
from the electric supply. Release the core bit.
Faulty or inadequate cooling. Check the water supply and cooling
circuit. Stop before reaching the target depth due to transition into softer material such as hollow brick, soil or natural stone.
Restart the drilling operation.
10 Disposal
Most of the materials from which Hilti tools, machines or appliances are manufactured can be recycled. The materials must be correctly separated before they can be recycled. In many countries, Hilti has already made arrangements for taking back old tools, machines and appliances for recycling. Ask Hilti customer service or your Hilti representative for further information.
Recommended pretreatment before disposal of drilling slurry NOTE
Disposal of drilling slurry directly into rivers, lakes or the sewerage system without suitable pretreatment presents environmental problems. Ask the local public authorities for information about current regulations.
1. Collect the drilling slurry (e.g. using a wet-type industrial vacuum cleaner).
2. Allow the drilling slurry to settle and dispose of the solid material at a construction waste disposal site (addition of a flocculent may accelerate the settling process).
3. The remaining water (alkaline, pH value > 7) must be neutralized by the addition of an acidic neutralizing agent or diluted with a large volume of water before it is allowed to flow into the sewerage system.
11 Manufacturer’s warranty
Please contact your local Hilti representative if you have questions about the warranty conditions.
