Troubleshooting - Kärcher B 90 R Mode D'emploi

Figure 25, see cover page
 Loosen the lock of the wiper flap.
 Push the bearing lid down and remove.
 Pull out the brush roller.
 Insert a new brush roller.
 Reattach the bearing lid and the wiper
flap in reverse sequence.
 Repeat process on the opposite side.
Replacing the Disk Brushes
 Lift the cleaning head.
 Press the pedal for changing the brush-
es downward beyond its resistance.
 Pull the disc brush out of the side below
the cleaning head.
 Hold the new disc brush under the
cleaning head, push upward and lock.
Replace pump hose (only Dose model)
 Unscrew the right stepping platform
and remove along with the drive pedal.
Figure 26, see cover page
1 Covering lid
2 Cover
3 Hose holder
4 Pump hose
5 Rotor
 Remove covering lid.
 Remove cover.
 Remove the hose holder with the pump
hose (turn manually to remove the rotor
manually).
Display Cause
E: Did you press the Press emergency-stop button.
emergency stop but-
ton !?!
E: Pow.module hot Control is overheated
Let cool down!
E: Overload Overload on brush motor
BRUSH
E: Hardw. failure Interference in the integrated charg-
Onboardcharger er (only Pack model)
E: Failure char- ging Battery defective
battery
E: Overload TRAC- Drive motor has got overheated due
TION MOTOR to a steep climb or locked brake.
Seat switch! Seat contact switch has not been
Please sit down! activated.
Release gaspedal The gas pedal is depressed when
the main switch is on.
Followup suction The key switch was turned to "0"
Shutdown shortly while the suction turbine was run-
ning.
Dirttank full Clean- waste water tank is full.
ing stops
Emergency brake Parking brake is defective.
operation! Drive at
ground level
18
 Replace pump hose.
 Dosing pump and appliance are
brought into operational state by per-
forming the same steps in the reverse
direction.
Frost protection
In case of danger of frost:
 Empty the fresh and dirt water reser-
voirs.
 Store the appliance in a frost-protected
room.

Troubleshooting

Danger
Risk of injury! Before carrying out any tasks
on the machine, set the main key to "0" and
remove it. Press emergency-stop button.
Place the appliance on a stable, even sur-
face and disconnect the battery.
 Drain and dispose of the dirt water and
the residual fresh water.
In case of faults that cannot be remedied
using the table below please contact the
customer service.
Faults with display
Remedy
Release emergency-stop button by turning. Set the main switch to "0". Wait un-
til display goes off. Set the main switch back to "1".
Turn the key switch to "0". Wait at least 5 minutes to let the control cool off.
Turn the appliance back on.
Set key switch to "0". Wait for 3 seconds. Turn the appliance back on. Reduce
the brush contact pressure.
Disconnect the power cord plug of the charger. Wait for 10 seconds. Plug in
the power cord plug. If the error message appears again: Call customer ser-
vice.
Check battery.
Allow machine to cool down at least 15 minutes. Set key switch to "0". Wait for
3 seconds. Turn the appliance back on. Avoid frequent uphill driving.
Release the drive pedal. Have a seat.
Release drive pedal and reactivate.
The suction turbine trails with a delay of 10 seconds. Wait until the appliance
shuts itself off after 10 seconds.
Empty the waste water tank.
Danger! Do not drive over upward/downward slopes.
Park the machine on an even surface.
Secure the machine with wheel chock(s) to prevent it from rolling away.
Inform Customer Service.
6
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EN
Replace fuses
Note:
Defective pole fuses should only be re-
placed by the service center. If these fuses
are defective, then customer service center
has to check the usage conditions and the
entire control system.
Fault indication
If errors appear on the display, then pro-
ceed as follows:
 Set the key switch to "0" (switch off the
machine).
 Wait till the text on the display has dis-
appeared.
 Set the main switch again to "1" (switch
on the machine). Carry out the trouble-
shooting measures in the given se-
quence only if the fault occurs again. At
such times, always bring the main
switch to the "0" position and ensure
that the emergency-stop button is de-
pressed.
 If the fault cannot be repaired, call cus-
tomer service and mention the error
message.
Note:
Fault messages that are not listed in the fol-
lowing table indicate faults that cannot be
rectified by the operator. Please contact the
aftersales service.