Kärcher BR 30/4 C User manual

English 5.906-768.0 Rev. 01 (10/20) 1
BR 30/4 C
BR 30/4 C Bp Pack
Service Manual

2 English 5.906-768.0 Rev. 01 (10/20)
1 Preface 4
2 Safety instructions 4
2.1 Hazard levels 4
3 Technical Features 4
3.1 Operation and control 4
3.2 Water System 4
3.3 Vacuuming operations 4
3.4 Vacuum bar 4
3.5 Electrical system 4
3.6 Cleaning operations 4
4 Setup and function 5
4.1 Front view (BR 30/4 C Adv and BR 30/4 C) 5
4.2 Front view (BR 30/4 C Bp Pack) 6
4.3 Front view (BR 30/4 C Bp Pack Power +) 7
4.4 Rear view (BR 30/4 C Adv and BR 30/4 C / BR 30/4 C Bp Pack) 8
4.5 View from below 9
4.6 Function 10
4.6.1 Parking/operating position 10
4.6.2 Raising/lowering the vacuum bar 10
4.6.3 Removing the tanks 10
4.6.4 Insert suction nozzle (BR 30/4 C Adv only) 12
4.6.5 Water flow schematic 13
4.6.6 Remove the cover from the cleaning head 13
4.6.7 Replace the batteries (BR 30/4 C Bp Pack only) 14
4.6.8 Replace battery (only BR 30/4 C Bp Pack Power +) 14
4.6.9 LED display on the brush head (BR 30/4 C Bp Pack only) 14
4.6.10 LED display on the brush head (only BR30 / 4 C Bp Power +) 14
4.6.11 Display on the battery 15
4.6.12 Displays on the charger (BR 30/4 C Bp Pack only) 16
4.6.13 Displays on the charger (only BR 30/4 C Bp Power +) 16
4.6.14 Control board (BR 30/4 C Bp Pack only) 17
5 Basic settings and service procedures 18
5.1 Removing the appliance components 18
5.1.1 Replacing the main switch 18
5.1.2 Replacing the water pump switch 19
5.1.3 Replacing the brush roller intake 19
5.1.4 Replacing the brush roller 20
5.1.5 Replacing the water distribution bar 20
5.1.6 Replace the vacuum bar. 20
5.1.7 Removing the cleaning head housing 21
5.1.8 Replacing the water pump 22
5.1.9 Voltage measurement on the water pump 22
5.1.10 Replacing the toothed belt 22
5.1.11 Replace the coupling 24
5.1.12 Replacing the suction turbine 24
5.1.13 Remove the parking position release 26
5.1.14 Cleaning the suction channel, the suction pipe and the suction hose 26
5.1.15 Replace the control board (BR 30/4 C Bp Pack only) 26
5.1.16 Replace control board (only BR 30/4 C Bp Pack Power +) 28
6 Troubleshooting 29
7 Circuit diagram 31
7.1 Circuit diagram 0.089-099.0 - BR 30/4 C (230V/50-60 Hz), BR 4.300 31
7.2 Circuit diagram 0.089-149.0 - BR 30/4 C (120 V/60 Hz) 32
7.3 Circuit diagram 0.089-150.0 - BR 30/4 C (100V/50-60 Hz) 33
7.4 Circuit diagram 0.089-811.0 - BR 30/4 C Bp pack 34
7.5 Circuit diagram 0.090-099.0 - BR 30/4 C Bp Power+ 35

English 5.906-768.0 Rev. 01 (10/20) 3
8 Technical specifications 36
8.1 BR 30/4 C - power models 36
8.2 BR 30/4 C Bp Pack 36
8.3 BR 30/4 C Bp Pack Power+ 37
8.4 Special tools 37

4 English 5.906-768.0 Rev. 01 (10/20)
Good service work requires extensive and practice-orient-
ed training as well as well-structured training materials.
Hence we offer regular basic and advanced training pro-
grammes covering the entire product range for all service
engineers.
In addition to this, we also prepare service manuals for im-
portant appliances - these can be initially used as instruc-
tion guides and later on as reference guides.
Apart from this, we also regular information about product
enhancements and their servicing.
If you should require supplements, have corrections or
questions regarding this document, please address these
citing the following subject to:
[e-mail]
The responsible product specialist will take care of your is-
sue.
Copying and duplication of texts and diagrams as well
as third-party access to this information is permitted
only with the explicit permission of the company:
Alfred Kärcher GmbH & Co. KG
P O Box 160
D -71349 Winnenden
www.kaercher.com
DANGER
Immediate danger that can cause severe injury or even
death.
몇WARNING
Possible hazardous situation that could lead to severe in-
jury or even death.
몇CAUTION
Possible hazardous situation that could lead to mild injury
to persons or damage to property.
The appliance is used for the wet cleaning of level floors.
A working width of 300 mm and a capacity of 4 l each of
the fresh and dirt water reservoirs enable an effective
cleaning of smaller surfaces.
The power supply operation allows a high capacity without
a restriction of the working time.
–The appliance can be used in a forward motion by
pushing it and backwards by pulling it by the handle.
The fresh water tank must be filled with the correct mixture
of water and detergent prior to operation. The detergent
solution flows to the brush head via a water pump and is
revacuumed by two vacuum bars.
–Content of fresh water tank: 3.7 l
–Content of waste water tank: 3.7 l
The suction turbine (M1) produces a vacuum pressure in
the waste water tank, which pulls the wastewater from the
vacuum bar to the waste water tank.
If the waste water tank is full, the float closes the suction
opening.
The waste water tank can be removed from the appliance
for cleaning purposes.
NOTICE
The suction turbine (M1) does not switch off automatically
when thewastewater reservoirisfull.Only whenyoupress
the main switch, the suction turbine (M1) will shut off.
For the appliances BR 30/4 C and BR 30/4 C Bp Pack, it is
possible to lift the suction bar and perform a wet cleaning
only.
The BR 4.300 does not have a suction bar lift.
The vacuum bar can be replaced without the use of tools.
The switches for the operation of the appliance are located
in the handle and on top of the housing.
–The main switch (S1) for brushing and vacuuming op-
erations are located on top of the housing.
–The switch (S2) for the operation of the water pump
(M3) is located in the handle.
Mains models
–230V / 50/60Hz / 16A.
–120V / 60Hz / 15A
–100V / 50/60Hz / 7A
BR 30/4 C Bp Pack
–One battery with 36V / 7.5Ah
The brush contact pressure cannot be adjusted.
The brush roller has a diameter of 60 mm. It rotates at
1,450 rpm for the mains model and at 1,270 for the battery
model.
BR 30/4 C Adv
To vacuum in corners, a vacuuming nozzle can be at-
tached to the vacuum pipe of this model.
1Preface
Subject: Case 111410
2 Safety instructions
2.1 Hazard levels
3 Technical Features
3.1 Operation and control
3.2 Water System
3.3 Vacuuming operations
3.4 Vacuum bar
3.5 Electrical system
3.6 Cleaning operations

English 5.906-768.0 Rev. 01 (10/20) 5
1 Handle
2 Cable hook
3 Main switch for brushing/vacuuming operations
4 Fresh water tank lock
5 Release, park position
6 Vacuum bar lift pedal
7 Cleaning head
8 Fresh water tank
9 Fresh water level display
10 Release of fresh water reservoir
11 waste water tank
12 Release, waste water tank
13 Carrying handle
14 Water pump switch
4 Setup and function
4.1 Front view (BR 30/4 C Adv and BR 30/4 C)

6 English 5.906-768.0 Rev. 01 (10/20)
1 Handle
2 Main switch for brushing/vacuuming operations
3 Fresh water tank lock
4 Release, park position
5 Vacuum bar lift pedal
6 Cleaning head
7 Battery
36 V / 7.5 Ah
8 Fresh water tank
9 Fresh water level display
10 Release of fresh water reservoir
11 waste water tank
12 Release, waste water tank
13 Carrying handle
14 Water pump switch
15 Battery
16 Mains connection
17 Charger
18 Battery charge indicator
4.2 Front view (BR 30/4 C Bp Pack)

English 5.906-768.0 Rev. 01 (10/20) 7
1 Handle
2 Water pump switch
3 Main switch for brushing/vacuuming operations
4 Release of fresh water reservoir
5 waste water tank
6 Release, waste water tank
7 Fresh water level display
8 Fresh water tank
9 Battery
36 V / 7.5 Ah
10 Cleaning head
11 Carrying handle
12 Fresh water tank lock
13 Battery
14 Release, park position
15 Charger
16 Vacuum bar lift pedal
17 Indicator lamp
18 Mains connection
4.3 Front view (BR 30/4 C Bp Pack Power +)

8 English 5.906-768.0 Rev. 01 (10/20)
1 Handle
2 Cable hook
3 Cable hook, rotating
4 Vacuum nozzle intake
5 Exhaust air cover
6 Suction hose
7 Release, park position
8 Suction tube connection
9 Suction tube
10 Bellow
11 Vacuum bar holder (BR 30/4 C Adv only)
12 Suction nozzle (BR 30/4 C Adv only)
13 Vacuum bar (BR 30/4 C Adv only)
14 Suction tube handle (BR 30/4 C Adv only)
4.4 Rear view (BR 30/4 C Adv and BR 30/4 C / BR 30/4 C Bp Pack)

English 5.906-768.0 Rev. 01 (10/20) 9
1 Park roller
2 Space roller
3 Rear vacuum bar
4 Brush roller
5 Front vacuum bar
6 Space roller
The spacer rollers prevent the cleaning head from scrap-
ing on the floor when the brush is worn.
4.5 View from below

10 English 5.906-768.0 Rev. 01 (10/20)
To operate, the release of the parking position must be
pressed (small arrow) and the appliance has to be swiv-
elled back simultaneously. The parking roller submerg-
es into the cleaning head and the brush roller touches
the floor.
1 Pedal position, vacuum bar raised
2 Vacuum bar lift pedal
3 Pedal position, vacuum bar lowered
The vacuum bars can be raised or lowered using the pedal
for the vacuum bar lift.
NOTICE
Turn the appliance off before you activate the suction bar
lift. Otherwise, the brush drive can be triggered.
The BR 4.300 does not have a suction bar lift.
1 waste water tank
2 Fresh water tank
3 Wastewater inlet opening with seal
4 Suction tube
5 Funnel for fresh water inlet
6 Suction air channel
7 Suction air stub with seal
The fresh water tank and the waste water tank can be
removed to fill, empty and clean the appliance.
1 Fresh water tank
2 Fresh water tank lock
3 Release of fresh water reservoir
Pull on the release and remove the fresh water reser-
voir from the appliance toward the front.
4.6 Function
4.6.1 Parking/operating position
4.6.2 Raising/lowering the vacuum bar
4.6.3 Removing the tanks

English 5.906-768.0 Rev. 01 (10/20) 11
To fill the fresh water tank, open the latch and fill the
fresh water tank with water and detergent.
1 Water outlet valve
2 Tappet
The water outlet valve is located at the bottom of the
fresh water reservoir.
1Valve pin
2Sieve
When inserting it into the appliance, the valve pin push-
es the tappet into the water outlet valve and the water
can flow to the water pump (M2).
The contaminated sieve can be removed for cleaning.
1 Spring element
The spring element pushes the waste water tank down.
This will prevent damage to the seal rings during the instal-
lation of the waste water tank.
1 waste water tank
2 Release, waste water tank
Push the release for the waste water tank down and re-
move the waste water tank from the appliance toward
the front.
1 waste water tank
2 Cover dirt water reservoir
3 Air suction opening
4 Wastewater inlet opening
5 Lock, lid
The lid of the waste water tank houses the air suction
opening and the wastewater inlet opening.
In order to remove the lid, open the lock and pull the lid
off the wastewater reservoir upwards.

12 English 5.906-768.0 Rev. 01 (10/20)
1 Wastewater inlet opening
2 Water separator
3 Cover dirt water reservoir
4Seal
5 Floater seal
6 Locking flap
7Float
The floater is located in the lid. This floater closes up
the air suction opening and suctioning is no longer pos-
sible.
The waste water tank needs to be emptied.
With model BR 30/4 C Adv, a suction nozzle can be at-
tached to vacuum in corners.
1 Suction pipe holder
2 Suction tube
Remove the suction pipe from the suction pipe holder.
1 Suction nozzle
2 Suction tube connection
3 Suction tube
Pull the suction pipe out of the suction pipe connection
toward the top.
1 Suction tube
2 Suction nozzle
Attach the suction nozzle to the suction pipe.
4.6.4 Insert suction nozzle (BR 30/4 C Adv
only)

English 5.906-768.0 Rev. 01 (10/20) 13
1 waste water tank
2 Fresh water tank
3 Rear vacuum bar
4 Cleaning head
5 Brush roller
6 Front vacuum bar
7 Water distribution bar
1 Cover of cleaning head
2 Vacuum bar lift pedal
Remove the cover from the cleaning head toward the
top.
The cover has several hooks that lock into the cleaning
head.
1 Vacuum bar lift pedal
2 Vacuum bar guide
3 Vacuum bar
4 Vacuum bar holder
5 Suction channel
4.6.5 Water flow schematic 4.6.6 Remove the cover from the cleaning head

14 English 5.906-768.0 Rev. 01 (10/20)
1 Battery compartment
2 Battery
3 Unlocking
Push unlocking mechanism in the direction of the arrow
and pull the discharged battery from the battery com-
partment.
Insert the charged batteries into the battery compart-
ment and push in until they lock into place.
1 Release button
2 Battery
3 Battery compartment
Press the release button.
Remove the rechargeable battery.
Insert the charged batteries into the battery compart-
ment and push in until they lock into place.
1 LED status indicator
2 Battery storage
3Battery
1 LED status indicator
2Battery
4.6.7 Replace the batteries (BR 30/4 C Bp Pack
only)
4.6.8 Replace battery (only BR 30/4 C Bp Pack
Power +)
4.6.9 LED display on the brush head (BR 30/4 C
Bp Pack only)
4.6.10 LED display on the brush head (only
BR30 / 4 C Bp Power +)
Remaining run time
3 LEDs light up: min. about 30 - 22.5
2 LEDs light up min. about 22.5 - 15
1 LED lights up: min. about 15 - 7.5
1 LED flashes: min. about 7.5 - 0

English 5.906-768.0 Rev. 01 (10/20) 15
BR 30/4 C Bp Pack
1 Battery
2 LED status indicator
3 PRÜFTASTE/ TESTBUTTON
The equipment electronics checks the battery's charging
state.
–No LED lights up: Voltage < 29.7 volts, battery is empty.
–1 LED flashes: Voltage between 29.5 volts and 35.0
volts.
–1 LED lights up: Voltage between 35.1 volts and 36.2
volts.
–2 LEDs light up: Voltage between 36.3 volts and 37.2
volts.
–3 LEDs light up: Voltage above 37.3 volts.
If the battery is empty, the machine switches off after 30
seconds.
BR 30/4 C Bp Pack Power+
1 Display
2Battery
Display in the battery display
4.6.11 Display on the battery

16 English 5.906-768.0 Rev. 01 (10/20)
–Red LED glows:
The battery pack is too hot or too cold.
The charging process starts when the battery pack has
reached the correct charging temperature.
–Red LED blinks:
Battery pack has not been placed correctly on the bat-
tery holder.
Battery pack is defective.
–LED green, battery is charging
- glows: Battery pack full
- blinks: Battery pack is being charged
The battery has an overvoltage detection. In the event of a
fault, a chemical safety feature is activated
Note: The performance of the battery pack reduces when
temperature falls below -10 °C.
Note: Storage for a long time at temperatures above 40 °C
can reduce the capacity of a battery pack.
Insert the mains plug into the socket.
–The device conducts a self-test. Both the LEDs glow for
1 second. The device then goes into the stand-by
mode: both LEDs get switched off.
Slide the batter pack on the battery holder of the charg-
er.
–The battery pack will be charged automatically; the
green LED blinks.
–If the battery pack is too hot or too cold, the red LED
glows. The charging process starts when the battery
pack has reached the correct charging temperature
(5 °C...45 °C).
–When the battery pack is fully charged, the green LED
glows. The charger automatically switches to retention
charging.
Remove the battery pack and insert it in the device.
Note: The charged battery pack can remain on the charger
till it is to be used. There is no risk of over-charging.
Note: In order to avoid unnecessary energy consumption,
however, the charger should be unplugged as soon as the
battery pack is fully charged.
See operating instructions.
5.969-146.0
Display Meaning
Battery pack in storage Charging state of the battery pack while not in use. Figure A
Battery pack in use Remaining run time of the battery pack while in use. Figure B
Battery pack charging Remaining charging time of the battery pack during charging. Figure C
The battery pack is fully charged. Figure D
Error display The battery pack temperature lies outside the permissible temperature
range or the battery pack is disabled due to a short circuit. Figure E
Battery pack is defective and disabled for safety. Do not use the battery
pack and dispose of it properly. Figure F
4.6.12 Displays on the charger (BR 30/4 C Bp
Pack only)
4.6.13 Displays on the charger (only BR 30/4 C
Bp Power +)

English 5.906-768.0 Rev. 01 (10/20) 17
BR 30/4 C Bp Pack
BR 30/4 C Bp Pack Power+
The printed circuit board allows the safe and reliable oper-
ation of the battery-powered BR 30/4 via voltage and cur-
rent measurement.
5.1.15Replace the control board (BR 30/4 C Bp Pack
only)
5.1.16Replace control board (only BR 30/4 C Bp Pack
Power +)
4.6.14 Control board (BR 30/4 C Bp Pack only)

18 English 5.906-768.0 Rev. 01 (10/20)
1 Main switch for brushing/vacuuming operations
1 Housing top
2 Spring element
Remove the waste water tank (see chapter "Removing
the tanks").
Loosen the fastening screws (arrows).
Slide the casing top toward the top.
1 Main switch for brushing/vacuuming operations
2 De-interference capacitor
Remove the cable plug connections from the main
switch.
Push the main switch out of the top of the housing.
Install the new main switch in reverse order.
1 Connector, protective conductor cable
2 Connector, pump
Main switch / check switch
Connect a resistance gauge between the connection
plug 1 and 1a or 2 and 2a.
Target value:
Main switch turned off = >1 MOhm
Main switch turned on = <2 Ohm
NOTICE
For the BR 30/4 Bp, the switch must be pressed for >300
msec for the appliance to be switched on.
BR 30/4 C Bp Pack
1 Connector, pump
5 Basic settings and service procedures
5.1 Removing the appliance components
5.1.1 Replacing the main switch

English 5.906-768.0 Rev. 01 (10/20) 19
1 Fastening screws (3x), housing cover
2 Covering lid
3 Water pump switch
Unscrew the screws.
1 Covering lid
2 Water pump switch
Remove the housing cover.
Remove the cable plug connections from the water
pump switch.
Press the water pump switch out of the housing cover
from the inside out.
Install the new water pump switch in reverse order.
Check the water pump switch
Connect a resistance gauge between the connection
plug 1 and 1a or 2 and 2a.
Target value:
Water pump switch turned off = >1 MOhm
Water pump switch turned on = <2 MOhm
1 Fastening screws (3x), cover
2 Cover
Unscrew the screws.
Remove cover.
1 Toothed belt disc
2 Outer ball bearing
3 Gear belt
Remove the drive unit from the cleaning head.
1 Towing, brush roller
2 Inner ball bearing
5.1.2 Replacing the water pump switch 5.1.3 Replacing the brush roller intake

20 English 5.906-768.0 Rev. 01 (10/20)
3 Toothed belt disc
4 Outer ball bearing
Install the new drive unit in reverse order.
1 Brush roller
2 Unlocking button for the changeable brush
Press the unlocking button of the brush roller.
Swivel the brush roller out of the cleaning head and re-
move.
1 Towing, brush roller
Install the new brush roller in reverse order.
When inserting the brush roller, make sure that the tow-
ing is properly placed in the brush roller.
1 Water distribution bar
Remove the brush roller (see chapter "Removing the
brush roller").
1 Water distribution bar
2 Rubber tab, water distribution bar
3 Water outlet
4 Cover, water distribution bar
Pull the water distribution bar out of the cleaning head
by the rubber tab.
Install the new water distribution bar in reverse order
press firmly onto the water outlet.
The water distribution bar has a cover on both sides, which
can be opened. If necessary, the water distribution bar can
be rinsed with water.
1 Vacuum bar
The vacuum bars can be replaced without the use of tools.
5.1.4 Replacing the brush roller
5.1.5 Replacing the water distribution bar
5.1.6 Replace the vacuum bar.