Read these safety instructions, these original instructions, the safety instructions provided with the battery pack and the original instructions for the battery pack/standard charger supplied before using the device for the first time. Act in accordance with them. Keep the booklets for future reference or for future owners.

In addition to the notes in the operating instructions, you also need to take into consideration the general safety regulations and accident prevention guidelines applicable by law.

The locking button blocks the trigger and prevents the device from switching on unintentionally.

The motor circuit breaker switches off the device if the current consumption/temperature is too high.

Wait 20 seconds or allow the device to cool down before switching it on again.

The packing materials can be recycled. Please dispose of packaging in accordance with the environmental regulations.

Electrical and electronic devices contain valuable, recyclable materials and often components such as batteries, rechargeable batteries or oil, which - if handled or disposed of incorrectly - can pose a potential danger to human health and the environment. However, these components are required for the correct operation of the device. Devices marked by this symbol are not allowed to be disposed of together with the household rubbish.

Cleaning work producing in oily waste water, e.g. washing engines, washing undercarriages etc., may only be performed at washing stations with an oil separator.

Extraction of water from public waterways is not permitted in some countries.

Current information on content materials can be found at: www.kaercher.de/REACH

The battery-operated pressure washer is intended for private use only.

The battery-operated pressure washer is intended for cleaning machines, vehicles, buildings, tools, façades, terraces, garden machines etc. using a water jet.

Only use the device with battery packs and chargers from the KÄRCHER 18 V Battery Power (+) system.

Suitable battery packs and chargers are marked with the KÄRCHER 18 V Battery Power (+) System symbol. Suitable battery packs bear the designation "Battery Power 18/... and Battery Power+ 18/...". Suitable chargers bear the designation "BC 18 V ...".

Only use original accessories and original spare parts. They ensure that the appliance will run fault-free and safely.

Information on accessories and spare parts can be found at www.kaercher.com.

The following are available as special accessories:

• Battery packs/chargers that are not included in the scope of delivery or that are additionally required

• A quick charger and a battery pack with a larger capacity

The scope of delivery for the appliance is shown on the packaging. Check the contents for completeness when unpacking. If any accessories are missing or in the event of any shipping damage, please notify your dealer.

The maximum amount of equipment is described in these operating instructions. Depending on the model used, there are differences in the scope of delivery (see packaging).

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1. Flat jet nozzle
2. Flat jet nozzle unlocking button
3. Long spray lance
4. Medium pressure gun
5. Locking button
6. Unlocking button
7. Trigger
8. Clip on the medium pressure gun
9. Short spray lance
10. Carrying handle for device
11. Medium pressure hose
12. *Garden hose (fabric reinforced, diameter at least 1/2 inch (13 mm), length at least 7.5 m, with commercially available quick coupling)
13. Coupling
14. **KÄRCHER SH 5 suction hose for water supply from open containers
15. ***Battery Power 18 V plug-in charger
16. ***Battery Power 18/25 battery pack
17. Gun holder
18. Device
19. Clip on the device
20. Spray lance holder
21. Operating state LED
22. ON/OFF button
23. Battery pack unlocking button
24. Battery pack holder
25. Water spigot
26. Type plate
27. Fine filter

*Additionally required and available separately

**Optionally available

***Except for battery set: Additionally required and available separately

Water reservoir WT 12l

(optionally available, included in the scope of delivery for OC 6-18 Premium)

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1. Water reservoir
2. Device mount
3. Device unlocking button
4. Water reservoir lid
5. Pull handle
6. Water reservoir carrying handle
7. Hose switch
8. Wheel
9. Storage compartment
10. Stand
11. Outlet valve

The operating status LED indicates the operating status and faults.

	The device is switched on.
	The device is switched off.
	Blink code 1, see The device runs dry.
	Blink code 2, see The device is too hot or too cold.
	Blink code 3, see The device draws too much current.

Install the supplied loose parts onto the device before initial startup.

1. Push the spray lance holder into the left mount on the device until it audibly locks in place.

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2. Push the gun holder into the right mount on the device until it audibly locks in place.

1. Charge the battery pack (see operating instructions and safety instructions for the battery pack and the charger).

Installing

1. Attach the flat jet nozzle to the short or long spray lance until it audibly clicks into place.

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2. Press the short or the long spray lance into the medium pressure gun and fix it by turning it 90°.

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Removing

3. Press the spray lance into the medium pressure gun and loosen and pull it off by turning it 90°.

4. Press the flat jet nozzle unlocking button and pull off the flat spray nozzle.

Connecting

1. Unwind the medium pressure hose and eliminate any loops and twists.

2. Connect the medium pressure hose to the device:

   1. Pull the clip on the device.

   2. Plug in the medium pressure hose.

   3. Press back the clip on the device.

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3. Connect the medium pressure hose to the medium pressure gun:

   1. Pull the clip on the medium pressure gun.

   2. Plug in the medium pressure hose.

   3. Press back the clip on the on the medium pressure gun.

      ---

      

4. Pull on the medium pressure hose to check that it is firmly seated in the device and in the medium pressure gun.

Releasing

Note

Before releasing the medium pressure hose, disconnect the water supply or remove the device from the water reservoir, see Water removal from water reservoir, otherwise water will leak out.

5. Releasing is performed in the reverse sequence.

1. ATTENTION

   Risk of damage due to contaminated water and additives!

   Contamination in the water and additives can damage the device and the accessories.

   Operate the device only with clear fresh water without contamination or additives.

   Never use contaminated water, waste water or salt water.

   Check the pressure, temperature and quantity of the supply water for compliance with the requirements, see Technical data.

   Note

   Observe the water distribution company regulations.

1. Attach the garden hose (not included in the scope of delivery) to the coupling on the device.

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2. Connect the garden hose to the water line.

3. Open the water tap fully.

The device can be operated with the WT 12l water reservoir (special accessory 2.644-351.0, included the OC 6-18 Premium scope of delivery).

1. Push the device into the device mount on the water reservoir until it audibly latches into place.

   Note: The coupling must be mounted on the water connection!

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2. ATTENTION

   Risk of damage!

   There is a risk of damage if the device is submerged.

   Do not immerse the device in liquids.

   Do not fill the water reservoir by immersion or scooping.

   Fill the water reservoir:

   1. Unscrew and remove the water reservoir lid.

   2. Fill the water reservoir with clean, cold clear water.

   3. Attach the water reservoir lid and screw it shut.

      ---

      

      Note

      Water may escape when releasing the medium pressure hose from the device or medium pressure gun,.

3. Operate the device, see Operating the device.

Removing the device from the water reservoir

4. Switch off the device, see Switching the device on/off.

5. ATTENTION

   Risk of damage!

   There is a risk of damage if the device is removed improperly from the water reservoir.

   Only grasp the carrying handle of the device to remove the device from the water reservoir.

   Do not pull on the battery pack or the battery pack holder.

   Remove the device from the water reservoir:

   1. Press and hold the unlocking button on the device.

   2. Grasp the device by the carrying handle of the device and pull it out of the device holder.

      ---

      

This pressure washer is suitable for suctioning surface water with the KÄRCHER SH5 suction hose (special accessory, order number 2.644-124.0), e.g.from water butts or ponds (for maximum suction height, see Technical data).

1. Unscrew the coupling on the device.

2. Fill the suction hose with water.

3. Hand-tighten the union nut of the suction hose on the water connection piece and hang the suction hose in a water source (e.g. rain barrel).

   Lay the suction hose without kinks and do not put it under tension or pressure.

4. Vent the suction hose:

   1. Operate the device, see Operating the device, until no more air bubbles can be seen in the suction hose.

   2. Release the trigger.

   3. Press the locking button.

   Note

   If the device cannot be vented, remove the spray lance from the medium pressure gun, see Installing/removing the flat jet nozzle and spray lance, reduce the suction height and repeat the venting process.

   If the device still does not build up pressure, install the spray lance, connect the device to a water line and operate it for approx. 1 min until it is vented. Then repeat steps 1 to 4.

1. CAUTION

   Risk of injury and damage if the battery pack is not engaged!

   A battery pack that is not properly engaged can fall out and cause injury or damage.

   Make sure that the battery pack engages correctly in the battery mount.

   Push the battery pack into the battery mount until it audibly clicks into place, see .

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Switch on

1. Switch off the device:

   1. When drawing water from a water line or open container: Place the device with its underside on a horizontal, level surface.

      ---

      

   2. When drawing water from the water reservoir: Place the water reservoir with the wheels and feet on a horizontal, level surface.

      ---

      

2. Press the ON/OFF button.

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   The operating state LED lights up.

   The device is ready for operation.

Switching off

3. Press the ON/OFF button.

   The operating state LED goes out.

   The device is switched off.

1. Switch on the device, see Switching the device on/off.

2. Operate the device:

   1. Press the unlocking button.

   2. Pull the trigger as far as it will go and carry out the cleaning process.

      ---

      

1. Spray the detergent sparingly on the dry surface and let it work for a while (do not let it dry).

2. Rinse off the loosened dirt with the pressure jet, see Operating the device.

1. Interrupt the operation:

   1. Release the trigger.

   2. Press the locking button.

      The trigger is locked.

   ---

   

1. Press the ON/OFF button to switch off the device, see Switching the device on/off.

2. Remove the battery pack:

   1. Press the battery pack unlocking button.

   2. Pull the battery pack out of the battery pack mount.

      ---

      

1. Release the trigger.

2. Stop the water supply to the device:

   1. When drawing water from a water line: Close the water tap.

   2. When drawing water from an open container: Unscrew the suction hose from the water connection.

   3. When drawing water from the water reservoir: Drain the water reservoir.

3. Pull the trigger for max. 1 min.

   The pressure in the device is released and the residual water is pumped out of the device.

4. Release the trigger.

5. Press the locking button.

   The trigger is locked.

6. Press the ON/OFF button.

   The operating state LED goes out.

   The device is switched off.

7. When drawing water from a water line: Pull off the garden hose at the coupling.

8. Stow the accessories, see Stowing accessories.

9. Remove and charge the battery pack (see Removing the battery pack).

1. Finish operation, see Ending operation.

2. Release the medium pressure hose from the device and medium pressure gun, see Connecting/disconnecting the medium pressure hose.

3. Drain the residual water from the accessories.

4. Wind up the medium pressure hose.

5. Device with water reservoir: Attach the medium pressure hose to the hose holder.

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6. Install the flat jet nozzle on the long spray lance, see Installing/removing the flat jet nozzle and spray lance.

7. Engage the long spray lance on the spray lance holder.

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8. Install the short spray lance on the medium pressure gun, see Installing/removing the flat jet nozzle and spray lance.

9. Engage the medium pressure gun on the gun holder.

1. Finish operation, see Ending operation.

Carrying the device

2. Carry the device:

   1. Device without water reservoir: Lift and carry the device by the carrying handle of the device.

   2. ATTENTION

      Risk of damage!

      There is a risk of damage if carried improperly.

      Do not carry the device by the carrying handle of the device while there is water in the water reservoir, only use the carrying handle of the water reservoir.

      Device with water reservoir: Lift and carry the water reservoir by the water reservoir carrying handle.

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Pulling the device with the water reservoir

3. Pull the device with the water reservoir:

   1. Pull out the pull handle.

   2. Tip the water reservoir onto the wheels.

   3. Pull the water reservoir by the pull handle.

      ---

      

Transporting the device in a vehicle

4. Device with water reservoir: Push the pull handle down until it rests against the carrying handle of the water reservoir.

5. Load the device into the vehicle and secure the device against rolling away, slipping and tipping according to the respectively applicable guidelines.

1. Finish operation, see Ending operation.

2. ATTENTION

   Risk of damage due to algae!

   Moisture in the water reservoir can lead to algae formation during storage. Algae can damage the device and cause odours.

   Empty the water completely from the water reservoir after operation.

   Remove the water reservoir lid before storage to ensure sufficient ventilation

   Remove the water reservoir lid and place it in the storage compartment.

3. Store the device and accessories in an indoor space protected from frost and direct sunlight

The device is maintenance-free.

1. Clean the device with a moist cloth.

1. Clean the water reservoir with a moist cloth.

Clean the fine filter regularly.

1. Depressurize the device, see Ending operation.

2. Devices with a water reservoir: Remove the device from the water reservoir, see Water removal from water reservoir.

3. ATTENTION

   Risk of damage due to improper cleaning!

   The fine filter is damaged by improper cleaning.

   Clean the fine filter only under running water against its flow direction.

   Do not use sharp or hard objects such as needles or wire brushes.

   ATTENTION

   Risk of damage!

   The device may be damaged when operated without a fine filter.

   Do not operate the device without a fine filter or with a damaged fine filter.

   Check the fine filter for damage before installation and replace a damaged fine filter immediately.

   Clean the fine filter:

   1. Unscrew the coupling on the water spigot.

   2. Pull the fine filter out of the water connection.

   3. Rinse the fine filter under running water from the outside to the inside.

      ---

      

4. Install the fine filter in the reverse order.

Clean the outlet valve in the water reservoir if it is contaminated or leaking.

1. Depressurize the device, see Ending operation.

2. Remove the device from the water reservoir, see Water removal from water reservoir.

3. Clean the outlet valve:

   1. Tilt the water reservoir forwards.

   2. Use a water stream to rinse the contamination out of the outlet valve.

      ---

      

You can remedy minor faults using the following overview.

If in any doubt, please contact your authorised Customer Service.

• The device does not start up 

• Device switches off automatically 

• The device builds up no pressure, or insufficient pressure or the jet pulsates 

• The device is leaking 

• The medium pressure hose is leaking 

• The device runs dry 

• The device is too hot or too cold 

• The device draws too much current 

Cause:

The battery pack is not sitting properly in the battery mount.

Remedy:

1. Push the battery pack into the battery mount until it audibly clicks into place, see .

Cause:

The charging state of the battery pack is too low.

Remedy:

1. Charge the battery pack.

Cause:

The device or the battery pack is too hot / too cold.

Remedy:

1. Remove the battery pack from the device and let it cool down, see chapter .

2. Observe the maximum ambient temperature, see Technical data.

3. Do not place the device and the battery pack in the sun or operate/store them outside the permissible ambient temperature.

Cause:

The battery pack or charger is defective.

Remedy:

1. Replace the battery pack or charger.

Cause:

The device or the battery pack is overheated/too cold.

Remedy:

1. Remove the battery pack from the device and let it cool down, see chapter .

2. Observe the maximum ambient temperature, see Technical data.

3. Do not place the device and the battery pack in the sun or operate/store them outside the permissible ambient temperature.

Cause:

The nozzle hole of the flat jet nozzle is dirty.

Remedy:

1. Remove the dirt from the nozzle hole with a needle.

2. Flush the flat jet nozzle from the front with water.

Cause:

The water supply is too low.

Remedy:

1. Open the water tap completely.

2. Check the water inlet for sufficient flow rate.

Cause:

The water reservoir is empty.

Remedy:

1. Fill the water reservoir with clean, cold clear water.

Cause:

The water supply via the suction hose is insufficient.

Remedy:

1. Only use the KÄRCHER SH 5 suction hose.

2. Vent the suction hose and the device, see Suck water from open containers.

3. Lay the suction hose without kinks.

4. Pull the trigger all the way to the end stop.

5. Reduce the suction height, for maximum suction height see Technical data.

6. Still no water is still sucked in: Connect the device to a water line and operate it for approx. 1 min. Then install and vent the suction hose again, see Suck water from open containers.

Cause:

The sealing ring on the coupling is damaged.

Remedy:

1. Replace the sealing ring.

Cause:

The fine filter is dirty.

Remedy:

1. Clean the fine filter, see Cleaning the fine filter.

Cause:

The outlet valve in the water reservoir is dirty.

Remedy:

1. Clean the outlet valve, see Cleaning the outlet valve in the water reservoir.

Cause:

The medium pressure hose is not plugged into the device.

Remedy:

1. Do not release the medium pressure hose from the device while the device is connected to the water supply or inserted in the water reservoir.

2. Disconnect the water supply or remove the device from the water reservoir before releasing the medium pressure hose from the device, see Water removal from water reservoir.

Cause:

The sealing ring on the nozzle of the medium pressure hose is damaged.

Remedy:

1. Replace the sealing ring.

Cause:

The sealing ring on the coupling is damaged.

Remedy:

1. Replace the sealing ring.

Cause:

The device leaks a small amount for technical reasons.

Remedy:

1. In case of more serious leaks, have the device checked by KÄRCHER Service.

Cause:

The medium pressure hose is not plugged into the medium pressure gun.

Remedy:

1. Do not release the medium pressure hose from the medium pressure gun while the device is connected to the water supply or inserted in the water reservoir.

2. Disconnect the water supply before releasing the medium pressure hose from the medium pressure gun, see Connection to a water line or remove the device from the water reservoir, see chapter Water removal from water reservoir.

Cause:

The sealing ring on the nozzle of the medium pressure hose is damaged.

Remedy:

1. Replace the sealing ring.

Cause:

The medium pressure hose is damaged.

Remedy:

1. Replace the medium pressure hose immediately. Do not repair the medium pressure hose.

Cause:

The fine filter is dirty.

Remedy:

1. Clean the fine filter, see Cleaning the fine filter.

Cause:

The supplied water quantity is too low.

Remedy:

1. Check that the water supply requirements are met, see Connecting the water supply.

2. Check that the device is properly connected to the water supply and vented, see Connection to a water line, Water removal from water reservoir or Suck water from open containers.

3. Wait 20 s or let the device cool down before switching it on (the motor circuit breaker has tripped, see Motor circuit breaker).

Cause:

The motor circuit breaker has tripped, see Motor circuit breaker.

Remedy:

1. Allow the device to cool down or heat up.

2. Observe the maximum ambient temperature, see Technical data.

3. Do not place the device in the sun or operate/store it outside the permissible ambient temperature.

Cause:

Blockage due to foreign objects in the device or accessories.

Remedy:

1. Remove the foreign body from the nozzle hole of the flat jet nozzle with a needle.

2. Flush the flat jet nozzle from the front with water.

3. Have the device checked by KÄRCHER Service.

Cause:

Incompatible accessories used.

Remedy:

1. Only use accessories approved by KÄRCHER.

Cause:

The trigger was not pulled fully.

Remedy:

1. Pull the trigger all the way to the end stop.

The warranty conditions issued by our sales company responsible apply in all countries. We shall remedy possible malfunctions on your device within the warranty period free of cost, provided that a material or manufacturing defect is the cause. In a warranty case, please contact your dealer (with the purchase receipt) or the next authorised customer service site.

You can find more detailed information at: www.kaercher.com/dealersearch

We hereby declare that the machine described below complies with the relevant basic safety and health requirements in the EU Directives, both in its basic design and construction as well as in the version placed in circulation by us. This declaration is invalidated by any changes made to the machine that are not approved by us.

Product: Mobile Outdoor Cleaner

Type: OC 6-18, OC 6-18 Premium

2014/30/EU

2011/65/EU

2000/14/EC

EN 60335-1

EN 60335-2-54

EN 62233: 2008

EN 55014-1: 2017 + A11: 2020

EN 55014-2: 1997 + A1: 2001 + A2: 2008

EN IEC 63000: 2018

2000/14/EG: Annex V

OC 6-18, OC 6-18 Premium

Measured: 82

Guaranteed: 84

The signatories act on behalf of and with the authority of the company management.

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Documentation supervisor:

S. Reiser

Alfred Kärcher SE & Co. KG

Alfred-Kärcher-Str. 28 - 40

71364 Winnenden (Germany)

Ph.: +49 7195 14-0

Fax: +49 7195 14-2212

Winnenden, 2024/02/01

We hereby declare that the product described below complies with the relevant provisions of the following UK Regulations, both in its basic design and construction as well as in the version put into circulation by us. This declaration shall cease to be valid if the product is modified without our prior approval.

Product: Mobile Outdoor Cleaner

Type: OC 6-18, OC 6-18 Premium

S.I. 2016/1091 (as amended)

S.I. 2012/3032 (as amended)

S.I. 2001/1701 (as amended)

EN 60335-1

EN 60335-2-54

EN 62233: 2008

EN 55014-1: 2017 + A11: 2020

EN 55014-2: 1997 + A1: 2001 + A2: 2008

EN IEC 63000: 2018

S.I. 2001/1701 (as amended): Schedule 8

OC 6-18, OC 6-18 Premium

Measured: 82

Guaranteed: 84

The signatories act on behalf of and with the authority of the company management.

---

Documentation supervisor:

S. Reiser

Alfred Kärcher SE & Co. KG

Alfred-Kärcher-Str. 28 - 40

71364 Winnenden (Germany)

Ph.: +49 7195 14-0

Fax: +49 7195 14-2212

Winnenden, 2024/02/01