HiKOKI WH18DE Li-ion Cordless Tools Instructions

HiKOKI WH18DE Li-ion Cordless Tools

GENERAL POWER TOOL SAFETY

WARNING
Read all safety warnings, instructions, illustrations and specifi cations provided with this power tool.
Failure to follow all instructions listed below may result in electric shock, fi re 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

2. Keep work area clean and well lit.
   Cluttered or dark areas invite accidents.

3. Do not operate power tools in explosive atmospheres, such as in the presence of fl ammable liquids, gases or dust.
   Power tools create sparks which may ignite the dust or fumes.

4. Keep children and bystanders away while operating a power tool.
   Distractions can cause you to lose control.

5. Electrical safety

6. 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.
   Unmodifi ed plugs and matching outlets will reduce risk of electric shock.

7. 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.

8. Do not expose power tools to rain or wet conditions.
   Water entering a power tool will increase the risk of electric shock.

9. 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.

10. 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.

11. 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.

12. Personal safety

13. 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 infl uence of drugs, alcohol or medication.
    A moment of inattention while operating power tools may result in serious personal injury.

14. 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.

15. 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 fi nger on the switch or energising power tools that have the switch on invites accidents.

16. 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.

17. Do not overreach. Keep proper footing and balance at all times.
    This enables better control of the power tool in unexpected situations.

18. 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.

19. 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.

20. 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.

21. Power tool use and care

22. 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.

23. 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.

24. 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.

25. 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.

26. Maintain power tools and accessories. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may aff ect the power toolʼs operation. If damaged, have the power tool repaired before use.
    Many accidents are caused by poorly maintained power tools.

27. Keep cutting tools sharp and clean.
    Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.

28. 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 diff erent from those intended could result in a hazardous situation.

29. 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.

30. Battery tool use and care
    Recharge only with the charger specifi ed by the manufacturer.

31. charger that is suitable for one type of battery pack may create a risk of fi re when used with another battery pack.

32. Use power tools only with specifi cally designated battery packs.
    Use of any other battery packs may create a risk of injury and fi re.

33. 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 fi re.

34. Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, fl ush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.

35. Do not use a battery pack or tool that is damaged or modifi ed.
    Damaged or modifi ed batteries may exhibit unpredictable behaviour resulting in fi re, explosion or risk of injury.

36. Do not expose a battery pack or tool to fi re or excessive temperature.
    Exposure to fi re or temperature above 130 °C may cause explosion.

37. Follow all charging instructions and do not charge the battery pack or tool outside the temperature range specifi ed in the instructions. Charging improperly or at temperatures outside the specifi ed range may damage the battery and increase the risk of fi re.

38. Service

39. Have your power tool serviced by a qualifi ed repair person using only identical replacement parts.
    This will ensure that the safety of the power tool is maintained.

40. Never service damaged battery packs.
    Service of battery packs should only be performed by the manufacturer or authorized service providers.

PRECAUTION
Keep children and infi rm persons away.
When not in use, tools should be stored out of reach of children and infi rm persons.

CORDLESS IMPACT DRIVER SAFETY

WARNINGS

Hold the power tool by insulated gripping surfaces, when performing an operation where the fastener may contact hidden wiring. Fasteners contacting a “live” wire may make exposed metal parts of the power tool “live” and could give the operator an electric shock.

ADDITIONAL SAFETY WARNINGS

1. This is a portable tool for tightening and loosening screws, bolts and nuts. Use it only for these operation.

2. Make sure to securely hold the tool during operation. Failure to do so can result in accidents or injuries.(Fig. 13)

3. Make sure that the battery is installed fi rmly. If it is as all loose it could come off and cause an accident.

4. Preparing and checking the work environment. Make sure that the work site meets all the conditions laid forth in the precautions.

5. Do not allow foreign matter to enter the hole for connecting the rechargeable battery.

6. Never disassemble the rechargeable battery and charger.

7. Never short-circuit the rechargeable battery. Short-circuiting the battery will cause a great electric current and overheat. It results in burn or damage to the battery.

8. Do not dispose of the battery in fi re. If the battery is burnt, it may explode.

9. Bring the battery to the shop from which it was purchased as soon as the post-charging battery life becomes too short for practical use. Do not dispose of the exhausted battery.

10. Do not insert object into the air ventilation slots of the charger. Inserting metal objects or infl ammables into the charger air ventilation slots will result in electrical shock hazard or damaged charger.

11. Check the actual tightening torque with a toruqe wrench.

12. Stop the tool before switching the direction of rotation. Always release the switch and wait for tool to stop before switching the direction of rotation.

13. Never touch the turning part. Do not allow the turning part section to get near your hands or any other part of your body. You could be cut or caught in the turning part. Also, be careful not to touch the turning part after using continuously it for a long time. It gets quite hot and could burn you.

14. Please use the designated attachments which are listed in the operations manual and HiKOKI’s catalog. Accidents or injuries could result from not doing so.

15. Make sure to fi rmly install the attachments in the anvil. If the attachments is not fi rmly installed it might come out and cause injuries.
    After installing the driver bit, pull lightly out the bit to make sure that it does not come loose during use. If the guide sleeve does not return to its original position, then the bit is not installed properly.

16. Resting the unit after continuous work.

17. The power tool is equipped with a temperature protection circuit to protect the motor. Continuous work may cause the temperature of the unit to rise, activating the temperature protection circuit and automatically stopping operation. If this happens, allow the power tool to cool before resuming use.

18. The motor may stop in the event the tool is overloaded. In this should occur, release the tool’s switch and eliminate the cause of the overload.
    Avoid touching the front case which can heat up during continuous operation.

19. The use of the battery in a cold condition (below 0 degree Centigrade) can sometimes result in the weakened tightening torque and reduced amount of work. This, however, is a temporary phenomenon, and returns to normal when the battery warms up.

20. Install securely the hook. Unless the hook is securely installed, it may cause an injury while using.
    When electing to carry the tool hooked to your hip belt, make sure to detach the tool bit and side handle. Failure to do so may result in unexpected injury.

21. Do not touch the metal parts, as it gets very hot during continuous work.

22. Do not look directly into the light. Such actions could result in eye injury.
    Wipe off any dirt or grime attached to the lens of the LED light with a soft cloth, being careful not to scratch the lens.
    Scratches on the lens of the LED light can result in decreased brightness.

23. Keep the tool’s terminals (battery mount) free of swarf and dust.

24. Prior to use, make sure that swarf and dust have not collected in the area of the terminals.

25. During use, try to avoid swarf or dust on the tool from falling on the battery.

26. When suspending operation or after use, do not leave the tool in an area where it may be exposed to falling swarf or dust.
    Doing so could cause a short circuit that could result in smoke emission or ignition.

27. Always use the tool and battery at temperatures between – 5°C and 40°C.

28. Always charge the battery at an ambient temperature of 0–40°C.

CAUTION ON LITHIUM-ION BATTERY

To extend the lifetime, the lithium-ion battery equips with the protection function to stop the output.
In the cases of 1 to 3 described below, when using this product, even if you are pulling the switch, the motor may stop. This is not the trouble but the result of protection function.

1. When the battery power remaining runs out, the motor stops.
   In such a case, charge it up immediately.

2. If the tool is overloaded, the motor may stop. In this case, release the switch of tool and eliminate causes of overloading. After that, you can use it again.
   If the battery is overheated under overload work, the battery power may stop.
   In this case, stop using the battery and let the battery cool. After that, you can use it again.
   Furthermore, please heed the following warning and caution.

WARNING
In order to prevent any battery leakage, heat generation, smoke emission, explosion and ignition beforehand, please be sure to heed the following precautions.

1. Make sure that swarf and dust do not collect on the battery.
   • During work make sure that swarf and dust do not fall on the battery.
   • Make sure that any swarf and dust falling on the power tool during work do not collect on the battery.
   • Do not store an unused battery in a location exposed to swarf and dust.
   • Before storing a battery, remove any swarf and dust that may adhere to it and do not store it together with metal parts (screws, nails, etc.).
2. Do not pierce battery with a sharp object such as a nail, strike with a hammer, step on, throw or subject the battery to severe physical shock.
3. Do not use an apparently damaged or deformed battery.
4. Do not use the battery in reverse polarity.
5. Do not connect directly to an electrical outlets or car cigarette lighter sockets.
6. Do not use the battery for a purpose other than those specifi ed.
7. If the battery charging fails to complete even when a specifi ed recharging time has elapsed, immediately stop further recharging.
8. Do not put or subject the battery to high temperatures or high pressure such as into a microwave oven, dryer, or high pressure container.
9. Keep away from fi re immediately when leakage or foul odor are detected.
10. Do not use in a location where strong static electricity generates.
11. If there is battery leakage, foul odor, heat generated, discolored or deformed, or in any way appears abnormal during use, recharging or storage, immediately remove it from the equipment or battery charger, and stop use.
12. Do not immerse the battery or allow any fl uids to fl ow inside. Conductive liquid ingress, such as water, can cause damage resulting in fi re or explosion. Store your battery in a cool, dry place, away from combustible and fl ammable items. Corrosive gas atmospheres must be avoided.

CAUTION

1. If liquid leaking from the battery gets into your eyes, do not rub your eyes and wash them well with fresh clean water such as tap water and contact a doctor immediately.
   If left untreated, the liquid may cause eye-problems.

2. If liquid leaks onto your skin or clothes, wash well with clean water such as tap water immediately.
   There is a possibility that this can cause skin irritation.

3. If you fi nd rust, foul odor, overheating, discolor, deformation, and/or other irregularities when using the battery for the fi rst time, do not use and return it to your supplier or vendor.

WARNING
If a conductive foreign matter enters in the terminal of lithium ion battery, the battery may be shorted, causing fi re. When storing the lithium ion battery, obey surely the rules of following contents.

• Do not place conductive debris, nail and wires such as iron wire and copper wire in the storage case.
• To prevent shorting from occurring, load the battery in the tool or insert securely the battery cover for storing until the ventilator is not seen.

REGARDING LITHIUM-ION BATTERY TRANSPORTATION

When transporting a lithium-ion battery, please observe the following precautions.

WARNING
Notify the transporting company that a package contains a lithium-ion battery, inform the company of its power output and follow the instructions of the transportation company when arranging transport.

• Lithium-ion batteries that exceed a power output of 100 Wh are considered to be in the freight classifi cation of Dangerous Goods and will require special application procedures.
• For transportation abroad, you must comply with international law and the rules and regulations of the destination country.

USB DEVICE CONNECTION PRECAUTIONS

(ONLY WITH UC18YSL3 CHARGER)

When an unexpected problem occurs, the data in a USB device connected to this product may be corrupted or lost. Always make sure to back up any data contained in the USB device prior to use with this product.
Please be aware that our company accepts absolutely no responsibility for any data stored in a USB device that is corrupted or lost, nor for any damage that may occur to a connected device.

WARNING

• Prior to use, check the connecting USB cable for any defect or damage.
  Using a defective or damaged USB cable can cause smoke emission or ignition.

• When the product is not being used, cover the USB port with the rubber cover.
  Buildup of dust etc. in the USB port can cause smoke emission or ignition.

NOTE

• There may be an occasional pause during USB recharging.
• When a USB device is not being charged, remove the USB device from the charger.
• Failure to do so may not only reduce the battery life of a USB device, but may also result in unexpected accidents.
• It may not be possible to charge some USB devices, depending on the type of device.

NAMES OF PARTS (Fig. 1–Fig. 13)

| Front cap| | Pilot lamp
---|---|---|---
| Hammer case| | Charge indicator lamp
| Guide sleeve| | Driver bit

(sold separately)

| LED Light| | Groove
| Trigger switch| | Screw
| Battery| | Remaining battery indicator switch
| Hook| | Remaining battery indicator lamp
| Handle| | Display panel
| Push button| | Rubber cover
| Housing| | USB port
| Color plate

(sold separately)

| | USB cable
| Latch| |

SYMBOLS

WARNING
The following show symbols used for the machine. Be sure that you understand their meaning before use.

• WH18DE: Cordless Impact Driver

• To reduce the risk of injury, user must read instruction manual.

• Only for EU countries
  Do not dispose of electric tools together with household waste material!
  In observance of European Directive 2012/19/EU on waste electrical and electronic equipment and its implementation in accordance with national law, electric tools that have reached the end of their life must be collected separately and returned to an environmentally compatible recycling facility.

• Depending on attached battery. The heaviest weight is measured with BSL36B18 (sold separately).

STANDARD ACCESSORIES
In addition to the main unit (1 unit), the package contains the accessories listed on page 241.
Standard accessories are subject to change without notice.

APPLICATIONS
Driving and removing of machine screws, wood screws, tapping screws, etc.

SPECIFICATIONS

The specifi cations of this machine are listed in the Table on page 241.

NOTE
Due to HiKOKI’s continuing program of research and development, the specifi cations herein are subject to change without prior notice.

CHARGING

Before using the power tool, charge the battery as follows.

1. Connect the charger’s power cord to the receptacle. When connecting the plug of the charger to a receptacle, the pilot lamp will blink in red (At 1- second intervals).

2. Insert the battery into the charger.
   Firmly insert the battery into the charger as shown in Fig. 3 (on page 2).

3. Charging
   When inserting a battery in the charger, charging will commence and the pilot lamp will light continuously in red.
   When the battery becomes fully recharged, the pilot lamp will blink in red. (At 1-second intervals) (See Table 1)

   • Pilot lamp indication
     The indications of the pilot lamp will be as shown in Table 1, according to the condition of the charger or the rechargeable battery.

Table 1

• Regarding the temperatures and charging time of the battery.
  The temperatures and charging time will become as shown in Table 2.

NOTE

• The recharging time may vary according to temperature and power source voltage.

CAUTION

When the battery charger has been continuously used, the battery charger will be heated, thus constituting the cause of the failures. Once the charging has been completed, give 15 minutes rest until the next charging.

1. Disconnect the charger’s power cord from the receptacle.
2. Hold the charger fi rmly and pull out the battery.

NOTE
Be sure to pull out the battery from the charger after use, and then keep it.

CAUTION

• If the battery is charged while it is heated because it has been left for a long time in a location subject to direct sunlight or because the battery has just been used, the pilot lamp of the charger lights for 1 second, does not
  light for 0.5 seconds (off for 0.5 seconds). In such a case, fi rst let the battery cool, then start charging.

• When the pilot lamp fl ickers (at 0.2-second intervals), check for and take out any foreign objects in the charger’s battery connector. If there are no foreign objects, it is probable that the battery or charger is malfunctioning. Take it to your authorized Service Center.

• Since the built-in micro computer takes about 3 seconds to confi rm that the battery being charged with charger is taken out, wait for a minimum of 3 seconds before reinserting it to continue charging. If the battery is reinserted within 3 seconds, the battery may not be properly charged.

• If the pilot lamp does not blink in red (every second) even though the charger cord is connected to the power, it indicates that the protection circuit of the charger may be activated.
  Remove the cord or plug from the power and then connect it again after 30 seconds or so. If this does not cause the pilot lamp to blink in red (every second), please take the charger to the HiKOKI Authorized Service Center.

Charging

When inserting a battery in the charger, the charge indicator lamp will blink in blue.
When the battery becomes fully recharged, the charge indicator lamp will light up in green. (See Table 3)

1. Charge indicator lamp indication
   The indications of the charge indicator lamp will be as shown in Table 3, according to the condition of the charger or the rechargeable battery.
   Table 3

2. Regarding the temperatures and charging time of the rechargeable battery The temperatures and charging time will become as shown in
   Table 4.

NOTE
The recharging time may vary according to the ambient temperature and power source voltage.

• Disconnect the charger’s power cord from the receptacle.
• Hold the charger fi rmly and pull out the battery.

NOTE
Be sure to pull out the battery from the charger after use, and then keep it.

Regarding electric discharge in case of new batteries, etc.

As the internal chemical substance of new batteries and batteries that have not been used for an extended period is not activated, the electric discharge might be low when using them the fi rst and second time. This is a temporary phenomenon, and normal time required for recharging will be restored by recharging the batteries 2–3 times.

How to make the batteries perform longer.

1. Recharge the batteries before they become completely exhausted.
   When you feel that the power of the tool becomes weaker, stop using the tool and recharge its battery. If you continue to use the tool and exhaust the electric current, the battery may be damaged and its life will become shorter.

2. Avoid recharging at high temperatures.
   A rechargeable battery will be hot immediately after use. If such a battery is recharged immediately after use, its internal chemical substance will deteriorate, and the battery life will be shortened. Leave the battery and recharge it after it has cooled for a while.

CAUTION

• If the battery is charged while it is heated because it has been left for a long time in a location subject to direct sunlight or because the battery has just been used, the charge indicator lamp of the charger lights for 0.3 seconds,
  does not light for 0.3 seconds (off for 0.3 seconds). In such a case, fi rst let the battery cool, then start charging.

• When the charge indicator lamp fl ickers (at 0.2-second intervals), check for and take out any foreign objects in the charger’s battery connector. If there are no foreign objects, it is probable that the battery or charger is malfunctioning. Take it to your authorized Service Center.

• Since the built-in micro computer takes about 3 seconds to confi rm that the battery being charged with UC18YSL3 is taken out, wait for a minimum of 3 seconds before reinserting it to continue charging. If the battery is reinserted within 3 seconds, the battery may not be properly charged.

MOUNTING AND OPERATION

Action| Figure| Page|
---|---|---|---
Removing and inserting the battery| 2| 2
Charging| 3| 2
Mounting the bit| 4| 3
Reversing the rotational direction| 5| 3
Switch operation| 6| 3
Removing and mounting the hook| 7| 3
Remaining battery indicator| 8| 3
How to use the LED light*1| 9| 3
Charging a USB device from a electrical outlet| 10-a| 4
Charging a USB device and battery from a electrical outlet| 10-b| 4
How to recharge USB device| 11| 4
When charging of USB device is completed| 12| 4
Selecting accessories| ―| 242

1 How to use the LED light

NOTE

To prevent the battery power consumption caused by forgetting to turn off the LED light, the light goes off automatically in about 10 seconds.

LED LIGHT WARNING SIGNAL (Fig. 14)
This product features functions that are designed to protect the tool itself as well as the battery. While the switch is pulled, if any of the safeguard functions are triggered during operation, the LED light will blink as described in Table 5. When any of the safeguard functions are triggered, immediately remove your fi nger from the switch and follow the instructions described under corrective action.

Table 5

MAINTENANCE AND INSPECTION

1. Inspecting the driver bit
   Using a broken bit or one with a worn out tip is dangerous because the bit can slip. Replace it.

2. Inspecting the mounting screws
   Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, retighten them immediately. Failure to do so could result in serious hazard.

3. Maintenance of the motor
   The motor unit winding is the very “heart” of the power tool. Exercise due care to ensure the winding does not become damaged and/or wet with oil or water.

4. Cleaning on the outside
   When the power tool is stained, wipe with a soft dry cloth or a cloth moistened with soapy water. Do not use chloric solvents, gasoline or paint thinner, for they melt plastics.

5. Storage
   Store the power tool in a place in which the temperature is less than 40°C and out of reach of children.

Storing lithium-ion batteries.
Make sure the lithium-ion batteries have been fully charged before storing them.
Prolonged storage (3 months or more) of batteries with a low charge may result in performance deterioration, signifi cantly reducing battery usage time or rendering the batteries incapable of holding a charge.
However, signifi cantly reduced battery usage time may be recovered by repeatedly charging and using the batteries two to fi ve times.
If the battery usage time is extremely short despite repeated charging and use, consider the batteries dead and purchase new batteries.

CAUTION
In the operation and maintenance of power tools, the safety regulations and standards prescribed in each country must be observed.

Important notice on the batteries for the HiKOKI cordless power tools
Please always use one of our designated genuine batteries. We cannot guarantee the safety and performance of our cordless power tool when used with batteries other than these designated by us, or when the battery is disassembled and modifi ed (such as disassembly and replacement of cells or other internal parts).

GUARANTEE
We guarantee HiKOKI Power Tools in accordance with statutory/country specifi c regulation. This guarantee does not cover defects or damage due to misuse, abuse, or normal wear and tear. In case of complaint, please send the Power Tool, undismantled, with the GUARANTEE CERTIFICATE found at the end of this Handling instruction, to a HiKOKI Authorized Service Center.

Information concerning airborne noise and vibration
The measured values were determined according to EN62841 and declared in accordance with ISO 4871.
Measured A-weighted sound power level: 100 dB (A) Measured A-weighted sound pressure level: 89 dB (A) Uncertainty K: 3 dB (A).
Wear hearing protection.
Vibration total values (triax vector sum) determined according to EN62841.
Impact tightening of fasteners of the maximum capacity of the tool:
Vibration emission value ah = 11.5 m/s2
Uncertainty K = 1.5 m/s2

The declared vibration total value and the declared noise emission value have been measured in accordance with a standard test method and may be used for comparing one tool with another.
They may also be used in a preliminary assessment of exposure.

WARNING

• The vibration and noise emission during actual use of the power tool can diff er from the declared total value depending on the ways in which the tool is used especially what kind of workpiece is processed; and
• Identify safety measures to protect the operator that are based on an estimation of exposure in the actual conditions of use (taking account of all parts of the operating cycle such as the times when the tool is switched off and when it is running idle in addition to the trigger time).

NOTE
Due to HiKOKI’s continuing program of research and development, the specifi cations herein are subject to change without prior notice.

TROUBLESHOOTING

Use the inspections in the table below if the tool does not operate normally. If this does not remedy the problem, consult your dealer or the HiKOKI Authorized Service Center.

function was activated.

If the trigger switch is released once and then pulled again, the tool will run.

Tool suddenly stopped| Tool was overburdened| Get rid of the problem causing the overburden.
The battery is overheated.| Let the battery cool down.
The trigger switch was held down for 5 minutes or more.| This is not a malfunction.

The motor was automatically stopped to prevent failure of the tool.

Tool bits

-can’t be attached

-fall off

| The shape of the attachment portion doesn’t match| Use a bit with a hexagonal shaft that has a width across flats of 6.35 mm.
If you are using an L-type tool bit, replace it with an S-type bit.
Switch can’t be pulled| Forward/reverse selector button is positioned halfway| Press the button firmly into position for the desired direction of rotation.
An abnormal high-pitched noise occurs when the trigger switch is pulled.| The trigger switch is being pulled only slightly.| This is not a malfunction.

It does not occur if the trigger switch is pulled more fully.

Screw head slips or comes loose.| Bit number doesn’t match with the screw size| Install a suitable bit.
The bit is worn| Replace with a new bit.