Bosch GAS 400 A Professional Manual Original página 15

After Wet Extraction
After wet vacuuming, always clean the fill level
sensor (42) (see "Cleaning the fill level sensor
(see figures Q–R)", page 16).
To prevent mould growth after wet extraction:
– Remove the flat-pleated filter (31) and leave this to dry
thoroughly.
– Remove the top part of the dust extractor (12), open the
filter cover (40) and leave both elements to dry thor-
oughly.
Automatic/Manual Filter Cleaning (see figure M)
Automatic Filter Cleaning
Note: The automatic filter cleaning function is set to be on by
default when the dust extractor is switched on.
The LED indicator A (5) will light up continuously.
When automatic filter cleaning is active, the flat-pleated
filter (31) is cleaned every 15 s using 2 blasts of air (pulsat-
ing noise).
Regular use of the filter cleaning function will increase the
service life of the filter.
In order to achieve an optimum filter service life, deactivate
the automatic filter cleaning function only in exceptional
cases, e.g. for wet extraction.
Manual Filter Cleaning
Press the automatic filter cleaning button (8) to activate
manual filter cleaning. This deactivates automatic filter
cleaning and LED indicator A (5) goes out.
Press the manual filter cleaning button (7) to run manual fil-
ter cleaning. The flat-pleated filter (31) is cleaned using 2
blasts of air. The LED indicator M (6) will light up white for
2 s. If LED indicator M (6) goes out, the next blast of air can
be triggered. To do this, press the manual filter cleaning
button (7) again.
Note: For manual filter cleaning, please note that the time in-
terval between each time a button is pressed should be
2−3 s. Continuously pressing the manual filter cleaning
button (7) multiple times will cause the over-temperature
protection of the dust extractor to be activated. The over-
temperature protection will be automatically suspended
after a while (see "Rectifying Errors", page 16).
To switch off the manual filter cleaning, press the automatic
filter cleaning button (8).
A flat-pleated filter with surface dirt is still fully functional. It
is not necessary to clean the flat-pleated filter manually by
shaking or blowing it out; this may even damage the filter.
Maintenance and Service
Maintenance and Cleaning
Pull the plug out of the socket before cleaning or per-
u
forming maintenance on the vacuum cleaner, making
tool adjustments, changing accessories or putting
away the vacuum cleaner. This safety measure prevents
the vacuum cleaner from being started accidentally.
Bosch Power Tools
To ensure safe and efficient operation, always keep
u
the dust extractor and the ventilation slots clean.
Wear a dust mask when servicing and cleaning the va-
u
cuum cleaner.
In order to avoid safety hazards, if the power supply cord
needs to be replaced, this must be done by Bosch or by an
after-sales service centre that is authorised to repair Bosch
power tools.
For the user to carry out maintenance, the dust extractor
needs to be disassembled, cleaned and maintained as far as
this is possible without endangering maintenance personnel
or other persons. Before disassembly, the dust extractor
should be cleaned to prevent any potential hazards. The
room/enclosure in which the dust extractor is disassembled
should be well ventilated. Wear personal protective equip-
ment while carrying out maintenance. After completing
maintenance, the maintenance area should be cleaned.
An inspection regarding the dust extraction capability must
be carried out at least once a year by the manufacturer or
someone who has been trained, e.g. to check for filter dam-
age, that the dust extractor is tight and that the control unit
is functioning correctly.
Class L vacuum cleaners which were located in dirty environ-
ments should have their exteriors, as well as all their com-
ponents, cleaned or treated with sealant. When performing
maintenance and repair work, all dirty parts that cannot be
cleaned satisfactorily must be disposed of. Such parts must
be disposed of in impermeable bags in accordance with the
valid provisions for disposing of such waste.
– Clean the housing of the dust extractor occasionally with
a damp cloth.
Cleaning the container
Wipe the container (1) from time to time using a non-abras-
ive off-the-shelf cleaning product and leave it to dry.
Cleaning/Changing the Flat-Pleated Filter
(see figures N–O)
Hold the filter cover by the closing flap whilst opening
u
it, and make sure that the opened filter cover clicks
into the vertical position. There is a risk of injury if the
filter cover falls down.
The suction power is dependent on the condition of the fil-
ter. Therefore, the filter should be cleaned regularly.
If the flat-pleated filter (31) becomes damaged, replace it
immediately.
– Pull on the closing flap (24) and twist the filter cover (40)
upwards until it clicks into the vertical position.
– Hold the flat-pleated filter (31) by the supports and take
it out from above.
– Use a damp cloth to remove any dust and dirt that ac-
crues around the edge of the container (1) when remov-
ing the flat-pleated filter (31).
– The flat-pleated filter can be rinsed out under running wa-
ter.
– Insert the cleaned (or a new) flat-pleated filter (31), en-
suring that it is positioned correctly and securely.
English | 15
1 609 92A 91L | (29.01.2024)