Read these original instructions and the enclosed safety instructions before using the device for the first time. Act in accordance with them.

Keep both books for future reference or for future owners.

• If the operating instructions and safety instructions are not observed, the device can be damaged and dangers could arise for users and other persons.

• Notify the dealer immediately in the case of shipping damage.

• Check the package contents when unpacking for missing accessories or for damage.

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.

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

• This vacuum cleaner is intended for the continuous disposal of large fluid amounts (flood damage, vacuuming out containers, basins or tanks, etc.), as well as for the wet and dry cleaning of floor and wall surfaces.

• WARNING - The MWF hoover (mobile wet hoover for rescue and firefighting service) must not be used without a PRCD (fault current protection switch). Use without a PRCD can cause serious dangers.

• The KÄRCHER NT 50/1 Mwf has a mains cable with a PRCD-K fault current protection switch, which ensures that the vacuum cleaner can be used with a power generator.

• This device is suitable for commercial use, e.g. for trade, industry, fire brigades and technical relief organisations.

1. Unpack the device and install the accessories.

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Only applies when operating without a power generator:

It is recommended that this device only be connected to a socket that is protected by a 30 mA error current circuit breaker.

1. Wet vacuum cleaning with disposal pump

2. Wet vacuum cleaning without disposal pump

3. Dry vacuuming

1. Remove the brush strip.

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2. Install the squeegees.

• The fleece filter bag (special accessory) must always be removed when vacuuming fluids or wet substances.

1. Unlock and remove the suction head.

2. Pull the fleece filter bag (special accessories) out to the rear.

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3. Fold in the lock latch and seal the fleece filter bag tight (special accessories).

4. Fit and lock the suction head.

• The dust bag (special accessories) must always be removed when vacuuming fluids or wet substances.

1. Unlock and remove the suction head.

2. Fold up the dust bag (special accessories).

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3. Open the dust bag (special accessory) by pulling back the suction hose port.

4. Close the dust bag (special accessory) tightly with the closing strip underneath the opening.

5. Take out the dust bag (special accessories).

6. Fit and lock the suction head.

1. Open the filter cover.

2. Flat fold filter only: Remove the filter frame. Remove the flat fold filter (optional accessory) from the filter frame.

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3. Candle filter only: Take out the candle filter (special accessories).

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4. Insert coarse dirt filter in the filter frame.

5. Insert the filter frame into the suction head.

6. Close the filter cover until it audibly latches into place.

1. Unlock and remove the suction head.

2. Remove the cable clip of the disposal pump.

3. When inserting the pre-filter, push it over the suction hose port until it touches the container wall.

4. Insert the cable clip of the disposal pump.

5. Fit and lock the suction head.

1. Remove the cap.

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2. Connect the disposal hose (nominal width 3/4” or larger).

1. Drain the waste water via the drain hose.

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• The device switches off automatically when the maximum fluid level is reached.

• On completion of wet vacuum cleaning: Clean the float, container and, if necessary, the disposal pump with a damp cloth and dry.

• When vacuuming fine dust, a fleece filter (special accessory) or dust bag (special accessory) can also be used.

1. Unplug the mains plug of the disposal pump.

2. Unlock and remove the suction head.

3. Take out the cable holder of the disposal pump and replace it with a latch plate.

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4. Pull the pre-filter over the suction hose port and remove it.

5. Unscrew the union nut of the disposal pump.

6. Remove the disposal pump and plastic insert from the container.

7. Attach the cap instead of the disposal hose.

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8. Fit and lock the suction head.

1. Open the filter cover.

2. Remove the filter frame.

3. Remove the coarse dirt filter from the filter frame.

4. Flat fold filter only: Insert the flat fold filter (special accessory) into the filter frame. During insertion, ensure that the flat fold filter is flush on all sides. Insert the filter frame into the suction head.

5. Candle filter only: Insert the candle filter (special accessory) into the suction head.

6. Close the filter cover until it audibly latches into place.

1. Remove the squeegee.

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2. Install the brush strip.

1. Unlock and remove the suction head.

2. Fit the fleece filter bag (special accessory).

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3. Fit and lock the suction head.

1. Unlock and remove the suction head.

2. Attach dust bag (special accessories).

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3. Pull the dust bag (special accessories) over the container.

4. Fit and lock the suction head.

1. Turn the adjustment screw clockwise: High position of the floor nozzle

2. Turn the adjustment screw anti-clockwise: Low position of the floor nozzle

The suction hose is equipped with the clip 2.0 connection. All accessory parts with nominal width DN 40 and a clip 2.0 connection can be connected.

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1. Power button
2. Power off button / test button
3. Circuit breaker
4. Red indicator light

1. Plug in the device’s mains plug.

2. Press the on switch; the red indicator light illuminates. The circuit breaker is on standby.

3. Press the off switch/test button of the circuit breaker; the red indicator light goes out. The circuit breaker switches off.

4. Press the on switch; the red indicator light illuminates. The circuit breaker is on standby.

5. Switch on the device at the turn switch.

6. Continuously dispose of large fluid amounts: Switch on the disposal pump.

1. Remove the angle piece from the suction hose.

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2. Install the suction control on the suction hose.

3. Connect the angle piece to the suction control. Make sure that the clip ring is aligned as shown in the illustration.

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4. Regulate the suction power on the suction control (3-stage).

1. Continuously dispose of liquids or perform cleaning.

1. Unlock and remove the suction head.

2. Remove the cable clip of the disposal pump.

3. Pull the pre-filter over the suction hose port and remove it.

4. Empty the pre-filter.

5. When inserting the pre-filter, push it over the suction hose port until it touches the container wall.

6. Insert the cable clip of the disposal pump.

7. Fit and lock the suction head.

1. If necessary, switch off the disposal pump.

2. Switch off the device at the turn switch.

3. Press the off switch/test button of the circuit breaker; the red indicator light goes out. The circuit breaker switches off.

4. Pull out the device's mains plug.

1. Empty the container.

2. Vacuum off the inside and outside of the device and clean with a moist cloth.

1. Release the push handle lock and adjust the push handle.

1. Store the suction hose and mains cable as shown in the illustration.

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2. Store the device in a dry room and secure it against unauthorised use.

1. Remove the suction hose with floor nozzle from the support. Carry the device by the carrying handle and the suction pipe, not by the push handle.

2. When transporting the device in vehicles, secure it to prevent it from slipping or overturning in accordance with the respective valid guidelines.

The device may only be operated indoors.

1. Open the filter cover.

2. Remove the filter frame.

3. Take out the flat fold filter (special accessories).

4. Insert the flat fold filter (special accessories). During insertion, ensure that the flat fold filter is flush on all sides.

5. Insert the filter frame.

6. Close the filter cover until it audibly latches into place.

1. Open the filter cover.

2. Take out the candle filter (special accessories).

3. Insert the new candle filter (special accessories).

4. Close the filter cover until it audibly latches into place.

1. Open the filter cover.

2. Remove the filter frame.

3. Replace the coarse dirt filter.

4. Insert the filter frame.

5. Close the filter cover until it audibly latches into place.

1. Unlock and remove the suction head.

2. Pull the fleece filter bag (special accessories) out to the rear.

3. Fold in the lock latch and seal the fleece filter bag tight (special accessories).

4. Fit new fleece filter bag (special accessory).

5. Fit and lock the suction head.

1. Unlock and remove the suction head.

2. Fold up the dust bag (special accessories).

3. Open the dust bag (special accessory) by pulling back the suction hose port.

4. Close the dust bag (special accessory) tightly with the closing strip underneath the opening.

5. Take out the dust bag (special accessories).

6. Attach new dust bag (special accessories).

7. Pull the dust bag (special accessories) over the container.

8. Fit and lock the suction head.

1. Unlock and remove the suction head.

2. Remove the cable clip of the disposal pump.

3. Pull the pre-filter over the suction hose port and remove it.

4. Clean pre-filter.

5. When inserting the pre-filter, push it over the suction hose port until it touches the container wall.

6. Insert the cable clip of the disposal pump.

7. Fit and lock the suction head.

1. Unlock and remove the suction head.

2. Clean the float with a damp cloth.

3. Fit and lock the suction head.

1. Unlock and remove the suction head.

2. With disposal pump: Lay the container on its side and rinse it out with a water stream.

3. Without disposal pump: Remove the disposal pump (see dry vacuum cleaning) and clean the container.

4. Fit and lock the suction head.

• The suction head cannot be positioned properly 

• The circuit breaker cannot be switched on 

• Circuit breaker switches off repeatedly when the vacuum cleaner is switched on 

• Suction turbine does not start up 

• Suction turbine switches off 

• Suction power decreases 

• Escaping dust when dry vacuuming 

• Disposal pump does not run 

• Disposal pump is not extracting very much 

• The suction turbine stops during operation, disposal pump continues to run 

Remedy:

1. Push the pre-filter over the suction hose port until it touches the container wall.

Remedy:

1. Have the power supply socket checked by a qualified electrician.

2. Connect the mains plug of the device to another socket on a different circuit.

3. Notify Customer Service.

Remedy:

1. Notify Customer Service.

Remedy:

1. Check the socket and the power supply fuse.

2. Check the mains cable and the mains plug of the device.

3. Press the on switch of the circuit breaker.

4. Switch on the device.

5. Check the float.

Remedy:

1. Switch on the disposal pump.

2. Release the jammed float switch in the container.

Remedy:

1. Remove any blockages from the suction nozzle, suction pipe, suction hose or coarse dirt filter / flat fold filter / candle filter.

2. Change the filled fleece filter bag (special accessory).

3. Change the filled dust bag (special accessories).

4. Correctly engage the filter cover.

5. Change the flat fold filter (special accessory).

6. Change the candle filter (special accessory).

7. Check the drain hose for leaks.

8. Empty/clean the pre-filter.

9. Check the correct installation position of the flat fold filter (special accessory) or the candle filter (special accessory).

10. Check that the coarse dirt filter is correctly fitted.

Remedy:

1. Install flat fold filter (special accessory) or candle filter (special accessory).

2. Only with flat fold filters: Check that the flat fold filter (special accessory) is correctly fitted and correct if necessary.

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3. Change flat fold filter (special accessory) or candle filter (special accessory).

Remedy:

1. Check the socket of the device.

2. Release the jammed float switch in the container.

3. Release the jammed impeller in the pump.

Remedy:

1. Lay the disposal hose out without kinks.

2. Check the disposal hose for clogging.

Remedy:

1. Set the suction power on the suction control (3-stage) so that continuous suction is possible.

If the malfunction cannot be corrected, the device must be checked by the Customer Service department.

• The suction head cannot be positioned properly 

• The circuit breaker cannot be switched on 

• Circuit breaker switches off repeatedly when the vacuum cleaner is switched on 

• Suction turbine does not start up 

• Suction turbine switches off 

• Suction power decreases 

• Escaping dust when dry vacuuming 

• Disposal pump does not run 

• Disposal pump is not extracting very much 

• The suction turbine stops during operation, disposal pump continues to run 

Remedy:

1. Push the pre-filter over the suction hose port until it touches the container wall.

Remedy:

1. Have the power supply socket checked by a qualified electrician.

2. Connect the mains plug of the device to another socket on a different circuit.

3. Notify Customer Service.

Remedy:

1. Notify Customer Service.

Remedy:

1. Check the socket and the power supply fuse.

2. Check the mains cable and the mains plug of the device.

3. Press the on switch of the circuit breaker.

4. Switch on the device.

5. Check the float.

Remedy:

1. Switch on the disposal pump.

2. Release the jammed float switch in the container.

Remedy:

1. Remove any blockages from the suction nozzle, suction pipe, suction hose or coarse dirt filter / flat fold filter / candle filter.

2. Change the filled fleece filter bag (special accessory).

3. Change the filled dust bag (special accessories).

4. Correctly engage the filter cover.

5. Change the flat fold filter (special accessory).

6. Change the candle filter (special accessory).

7. Check the drain hose for leaks.

8. Empty/clean the pre-filter.

9. Check the correct installation position of the flat fold filter (special accessory) or the candle filter (special accessory).

10. Check that the coarse dirt filter is correctly fitted.

Remedy:

1. Install flat fold filter (special accessory) or candle filter (special accessory).

2. Only with flat fold filters: Check that the flat fold filter (special accessory) is correctly fitted and correct if necessary.

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3. Change flat fold filter (special accessory) or candle filter (special accessory).

Remedy:

1. Check the socket of the device.

2. Release the jammed float switch in the container.

3. Release the jammed impeller in the pump.

Remedy:

1. Lay the disposal hose out without kinks.

2. Check the disposal hose for clogging.

Remedy:

1. Set the suction power on the suction control (3-stage) so that continuous suction is possible.

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

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.

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: Wet/dry vacuum cleaner

Type: 1.148-xxx

2006/42/EC (+2009/127/EC)

2011/65/EU

2014/30/EU

EN IEC 63000: 2018

EN 55014-1: 2017 + A11: 2020

EN 55014-2: 2015

EN 60335-1

EN 60335-2-69

EN 61000-3-2: 2014

EN 61000-3-3: 2013

EN 62233: 2008

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The undersigned act on behalf and under the power of attorney 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, 2020/10/01

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: Wet/dry vacuum cleaner

Type: 1.148-xxx

S.I. 2008/1597 (as amended)

S.I. 2012/3032 (as amended)

S.I. 2016/1091 (as amended)

EN IEC 63000: 2018

EN 55014-1: 2017 + A11: 2020

EN 55014-2: 2015

EN 60335-1

EN 60335-2-69

EN 61000-3-2: 2014

EN 61000-3-3: 2013

EN 62233: 2008

-

The undersigned act on behalf and under the power of attorney 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, 2020/10/01