Karcher B 250 R I + R 120: Operation

     

- 

5



Release the park brake (see "Pushing 

the appliance").



One person must sit on the seat and ac-

tivate the brake pedal during the push-

ing if necessary.



Push down the appliance through the 

ramp from the pallet.



Re-tighten the screws of the park brake.

The sweep brushes must be installed be-

fore the initial operation (see "Maintenance 

work").

The brushes are mounted.



Insert the vacuum bar into the vacuum 

bar suspension in such a manner that 

the profiled sheet is positioned above 

the suspension.



Tighten the wing nuts.



Insert the suction hose.

Note:

Press emergency-stop switch to immedi-

ately switch off all functions of the machine.



DANGER

Risk of accident. Prior to every operation, 

the parking brake must be checked for 

proper function on a level ground.



Take the seating position. 



Release emergency-stop button by 

turning.



Set main switch to “1”.



Select direction of travel.



Gently depress drive pedal.

The brake must get released and you must 

be able to hear it (the control lamp for im-

mobilizing brake on the console switches 

off). The machine must roll slightly on a 

plane surface. When the pedal is released, 

the brake falls in an audible manner.  

Switch off the machine and call the after-

sales service if the above-mentioned 

events do not occur. 



DANGER

Risk of accident! If the machine does not 

brake, then proceed as follows:



If the machine does not come to a halt 

on a ramp with a gradient of 2% when 

you release the drive pedal, then the 

emergency-stop button may be 

pressed for safety reasons only if the 

mechanical functioning of the immobi-

lizing brake has been checked properly 

before commissioning the machine. 

Press the brake pedal if the machine 

does not brake properly. 



Switch off the machine only after it 

comes to a complete halt (on an even 

surface) and call up the aftersales ser-

vice!



Further, follow all warning instructions 

for braking.



DANGER

Danger of tipping if gradient is too high.



The gradient in the direction of travel 

should not exceed 15%.

Danger of tipping when driving round 

bends at high speed.

Danger of slipping on wet floors.



Drive slowly when cornering.

Danger of tipping on unstable ground.



Only use the machine on sound surfac-

es.

Danger of tipping with excessive sideways 

tilt.



The gradient perpendicular to the direc-

tion of travel should not exceed 15%.



DANGER

Increased risk of accident on account of tilt-

ing sweeper for B 250 RI models. Be extra 

careful while driving reverse and pay atten-

tion to the swiveling movement while steer-

ing the sweeper.



Move the seat adjustment lever away 

from the seat and hold it. 



Then push the seat forwards or back-

wards.



Release the seat adjustment lever and 

lock the seat in place.



Loosen the wing nut to adjust the steer-

ing wheel. 



Position the steering wheel.



Tighten the wing nuts.



Release emergency-stop button by 

turning.



Sit on the seat and set main switch to 

“1”.



Set the drive direction using the drive 

direction button at the operator console. 



Determine the driving speed by press-

ing the drive pedal. 



Stop the machine: Release driving ped-

al; press brake, if necessary. 

Note:

The direction of travel can also be changed 

while driving. This way, even heavily soiled 

spots can be cleaned by driving back and 

forth several times.

In case of overloading, the drive motor au-

tomatically switches off after a certain peri-

od. A fault message is displayed on the 

console. The concerned unit gets switched 

off if the controls get overheated.



Allow machine to cool down at least for 

15 minutes. 



Turn the key switch to "0", wait for a few 

seconds and then turn it to "1". 



Loosen the three hexagonal screws by 

key width 7 mm (arrow) by three revolu-

tions each to unlock the emergency 

brake.



Push the appliance.



Retighten the screw.



DANGER

Danger of accident by failing brakes. 

Retighten the screws immediately after the 

sliding process.

ATTENTION

Risk of damage to the suction turbine if op-

erated without flat folded filter.



Prior to operating the appliance, check 

the flat folded filter inside the lid of the 

waste water tank for its presence, cor-

rect installation and condition.



Replace damaged flat folded filter.

ATTENTION

Risk of damage. Only use the recommend-

ed detergents. With other detergents, the 

operator bears the increased risk regarding 

the operational safety and danger of acci-

dent.

Only use detergents that are free from sol-

vents, hydrochloric acid and hydrofluoric 

acid.

몇

CAUTION

Follow the safety instructions for using de-

tergents.

Note:

Do not use highly foaming detergents.

Recommended detergents:

Without battery

Installing the Brushes

BD model

BR model

Installing the Vacuum Bar

Operation

Check immobilizing brake

Driving

Ajdust the seat

Adjusting the steering wheel

Drive the machine

Overload

Pushing the device

Check flat folded filter

Filling in detergents

Detergent

21 EN

     - 

6



Open the cover of the fresh water reser-

voir.



Fill fresh water (max. 60 °C) until 15 cm 

below the upper edge of the tank. 



Pour in detergent.



Close the cover of the fresh water res-

ervoir.

Note:

Fill up the fresh water tank completely prior 

to the initial start-up to bleed the water pipe 

system.

With automatic fill of fresh water reser-

voir (option)

Note:

It is recommended to use a hose that is 

equipped with an Aquastop coupling on the 

appliance side. This minimises the spout-

ing of water when the hose is disconnected 

after the filling process.



Connect the hose to the automatic fill-

ing system and open the water supply 

(max. 60 °C, max. 5 bars).



Wait briefly - the automatic filling sys-

tem will interrupt the water supply when 

the tank is full.



Shut off the water supply and discon-

nect the hose from the appliance.

Detergent is added to the fresh water on 

the way to the cleaning head with the help 

of a dosaging device.

Note:

The dosing unit can be used to add 3% de-

tergent at maximum. With higher dosage 

the detergent must be put into the fresh wa-

ter tank.



Place the canister with the detergent in 

the trough behind the seat.



Unscrew the canister lid. 



Insert the suction hose of the dosing 

equipment into the canister.

Note:

– The appliance is equipped with a fresh 

water indicator in the display. If the 

fresh water tank is empty, the function 

of adding detergent gets deactivated. 

The cleaning head continues to work 

without liquid supply.

– Detergent addition is also stopped 

when the detergent can is empty. Indi-

cator lamp: "detergent tank empty" 

glows red.  Only fresh water is supplied 

to the cleaning head.

The sweeper picks up loose dirt before 

cleaning the floor. 

ATTENTION

Risk of damage to the sweeper.

–

Do not sweep in packing tapes, wires or 

similar objects. 

–

Only drive over steps with a maximum 

height of 2 cm with the B 250 RI mod-

els.

–

The dust filter can get blocked or germs 

can form in it.  Use the sweeper only to 

sweep dry surfaces.

몇

WARNING

Risk of injury!

Suction turbine, side brushes and filter 

cleaner continue to run for a while after 

switching off. 



Switch on "sweeping" button.

The sweeper is activated. The indicator 

lamp "sweeping" is on during the opera-

tions. 

The bulk waste flap can be raised to sweep 

in larger objects (up to max. 6 cm height). 

몇

DANGER

Risk of injury on account of electric shock. 

Raise the bulk waste flap only when there 

is no person standing close by.



Press the pedal for raising the bulk 

waste flap.

Note:

The vacuuming and sweeping performance 

is lower when the bulk waste flap is raised.  

Hence, raise the bulk waste flap only when 

needed.



Set "sweeping" button to "0".

The sweeper is deactivated. Once you 

have stopped sweeping, the dust filter is 

cleaned for approx. 15 seconds. The indi-

cator lamp "dust filter shaking" glows.

1

Transport mode

Driving to the Place of Use.

2

Eco mode

Wet clean the floor (with reduced brush 

speed) and vacuum up wastewater 

(with reduced suction).

3

Normal mode

Wet clean the floor and vacuum up dirt 

water.

4 Increased brush contact pressure

Wet clean the floor (with increased 

brush contact pressure) and vacuum up 

dirt water.

5

Intense mode

Wet clean the floor and allow the deter-

gent to react.

6

Vacuum mode

Suck in the dirt fleet. 

7

Polishing mode

Polishing the floor without the applica-

tion of liquid.

8 Manual cleaning

Apply liquid detergent using the wall-

ceiling-floor nozzle (optional) and vacu-

um it again.

Use the Info button to select the menu 

items and do the settings. 

– Turning the button to the right/left 

scrolls through the menus forward/ 

backward. 

– The selected setting gets accepted by 

pressing the button.

You can make the settings for the different 

cleaning programs in the operator menu.  

Different parameters can be set based on 

the cleaning program.  The settings are 

done using the Info button. 



Release emergency-stop button by 

turning.



Sit on the seat and set main switch to 

“1”.

The display shows the battery charging 

status and the fresh water level.



Select cleaning program. 



Call the operator menu by turning the 

info button.



Select the desired parameter by turning 

the Info button. The currently set value 

is displayed as a bar. 



Press Info button, the bar display blinks.



Reset the parameter by turning the Info 

button between "min" and "max". 



Accept modified setting by pressing the 

Info button or wait till the set value is ac-

cepted automatically. 

Application

Detergent

Routine cleaning of all water 

resistant floors

RM 745

RM 746

Routine cleaning of glossy 

surfaces (e.g. granite)

RM 755 ES

Routine cleaning and basic 

cleaning of industrial floors

RM 69 ASF

Routine cleaning and basic 

cleaning of fine stoneware 

tiles

RM 753

Routine cleaning of tiles in 

sanitary areas

RM 751

Cleaning and disinfection in 

sanitary areas

RM 732

Removal of coating from all 

alkali-resistant floors (e.g. 

PVC)

RM 752

Removal of coating from li-

noleum floors

RM 754

Fresh water

Metering device (option)

Sweeping (B 250 RI only)

Bulk waste flap

Stopping sweeping

Program selection switch

1

2

3

4

5

6

7

8

Info button

Settings

Operations menu

22 EN

     

- 

7

Note:

– If the selected parameter does not 

change within 10 seconds, then the dis-

play goes back to displaying the battery 

charging status and the fresh water lev-

el. 

– The same cleaning parameter can have 

individual settings for each cleaning 

program. 

– The brush pressure can be set only 

when the machine is on in the programs 

brush suction, wet brushing, polishing 

and polishing suction. 

– All settings are saved in the powerless 

state of the machine. 



Select the menu item "Accept default 

values?" in the operator menu by turn-

ing the Info button



Press Info button.  The factory settings 

of all parameters are restored for each 

cleaning program.

The table given below gives details of the 

factory settings of the parameters for the 

cleaning programs. If no values are en-

tered, then the respective parameter can-

not be set in the given cleaning program. 

To improve the vacuuming result on tiled 

floors the vacuum bar can be turned to an 

oblique position of up to 5°.



Release the wing nuts.



Turn the vacuum bar.



Tighten the wing nuts.

If the vacuum result is unsatisfactory the in-

clination of the straight vacuum bar can be 

modified.

Note:

The bent vacuum bar must be adjusted 

horizontally.



Release the wing nuts.



Tilt the vacuum bar.



Tighten the wing nuts.

– During normal operations (fresh water 

mode), water is taken from the fresh 

water tank and collected in dirt water 

tank after use. 

– Water can be circulated for floors with 

dirt levels of slight to normal. 



First clean in the fresh water mode till 

the water in the fresh water tank has 

been consumed. 



The set the switching of recyling/ fresh 

water mode to Recycling. 

Note:

– The dirt water is cleaned by a filter be-

fore being reused. 

– For recycling operations, the entire re-

cycling filter must lie below the dirt wa-

ter level. 

ATTENTION

Risk of damage due to overdose of deter-

gent.  Very often, the detergent contained 

in the dirt water has only been partially 

used.  Hence, in the recycling mode, the 

detergent quantity to be added is to be set 

to 0.

Note:

Overflow waste water tank. If the dirt water 

tank is full, the suction turbine switches off 

and the indicator lamp "dirt water tank full" 

begins to blink. All cleaning programs with 

suction are blocked for one minute. Empty 

the waste water tank.

Reset parameters

Adjustable pa-

rameters

min:step:ma

x

Remark

Water quantity 1:1:8

1=min., 

8=max.

Detergent dos-

ing unit

0:1:3

0=Off, 

1=min., 

3=max.

Brush pressure 0:1:8

0=min., 

8=max.

FACT (brush 

speed)

–

Power,

Whisper,

Fine Clean

Brush rotation 

time after stop

0s:1s:3s

From idling 

to lifting

Working speed 1:1:6

1=1km/h, 

6=6km/h

For B 250 RI only:

Trailing time for 

sweeper after 

stopping

0s:1s:5s

From idling 

to lifting

Factory setting BR...:

Water quantity

Detergent dosage (%)

Brush pressure

FACT (brush speed)

Brush trailing time (s)

Working speed

Suction blower value

Transport 

mode

– –

– – – – –

Eco mode

2 0,5 2 W

P

2 8 W

Normal mode

3 1

4 P

C

2 6 P

Increased 

brush contact 

pressure

4 3

7 P

C

2 6 P

Intense mode

5 3

4 P

C

2 6 –

Vacuum mode

– –

– – – 6 P

Polishing 

mode

– –

2 – – 6 –

Manual clean-

ing

– –

– – – – P

P=Power 

PC=Power Clean

W=Whisper

WP=Whisper Clean

Setting the Vacuum Bar

Oblique position

Inclination

Recycling operations (option)

Empty tanks

23 EN