BR/BD 75/140 R, BR/BD 90/140 R
Troubleshooting
Page 43 / 71
New Unit Information 03.2004
Troubleshooting
Faults could occur in the unit, with or without a
text display. You should always proceed as fol-
lows:
1. Turn key switch to position “0” (switch off unit).
2. Wait until the text on the display disappears.
3. Turn the key switch back to setting “I” (switch
unit back on).
4. If the fault occurs again, carry out the appropri-
ate repair work in the given sequence (see
corrective measure in the table below). Before
carrying out any service work on the unit al-
ways turn the key switch to the position “0”
and pull the central battery connector.
5. If the fault persists despite the repair meas-
ures carried out, the main control printed cir-
cuit board or the instrument panel printed cir-
cuit board will have to be replaced, depending
on the type of fault.
and
ORIGINAL
REVISED
Faults with no text in the
display
Corrective measures
Unit will not start
– Insert/check/replace battery connector.
– Check/replace fuse F1/F2.
– Check the auxiliary contact in the battery plug
connection.
– Check/replace key switch.
– Check the connection cable of the main instrument panel
printed circuit board.
– Replace main control printed ciruit board.
– Check/replace the instrument panel printed circuit board.
Not enough water
– Fill fresh-water tank.
– Check/clean water filter.
– Check water hose to brush head and remove any
blockage/ kinks, especially by BD-version.
– Check function of metering valve and replace if
necessary (see chapter Water system).
– Check/replace water pump.
Suction too low
– Clean fluff strainer in the dirty water tank.
– Check/clean/replace the seal on the dirty water tank lid.
– Clean/replace/rotate rubber strips on the suction bar.
– Check/replace suction hose.
– Check/adjust the suction bar settings.
Dirty water tank overflow
– Check/replace the float switch.
– Check cable connections to the printed circuit board for
interruptions/breaks and correct the fault.
– Replace the main control printed circuit board.
Poor cleaning result
– Check the brush rollers for foreign material and remove
if necessary.
– Adjust the contact pressure to the brush rollers.
– Check/adjust brush pattern.
