MIRKA 412, Manual, Page: 7 / 124

7
english
Mirka 412 / 415 / 415 M
4.4 Acoustic warning
(Mirka 415 M)
For safety reasons, an acoustic
warning sounds if the air speed
in the suction hose drops to be-
low 20 m/s. See section “Trou-
bleshooting”.
4.5 Cleaning the filter
element
Only after picking up harmless dust
using the waste bag.
If suction performance drops:
1. Set the suction power to
maximum.
2. Close the nozzles or suction
hose opening with the palm
of your hand.
3. Press the button to start filter
cleaning three times. The re-
sulting stream of air removes
attached dust from the slats
of the filter elements.
If the acoustic signal sounds again
after repeated cleaning, replace the
filter element (see section 7.2.4).
1 2
x3
Push & Clean
Filter Cleaning System
0
I auto
5 Applications and techniques
5.1 Techniques If used correctly, additional ac-
cessories, suction nozzles and
suction hoses can enhance the
cleaning action and reduce the
cleaning effort. Effective cleaning is achieved if
you follow just a few guidelines
in combination with your own
practical experience in special
fields.
Here are some basic tips.
5.1.1 Picking up dry
substances
Mirka 415 M: The suction hose
diameter must suit the position
of the switch in order to pick
up dry, nonflammable dust with
maximum room concentration
values.
There must always be a safety
filter bag in the tank before dry
substances with maximum room
concentration values are picked
up. See section 9.5 “Accesso-
ries” for ordering number.
To pick up harmless dust we rec-
ommend the use of a waste bag.
See section 9.5 “Accessories”
for ordering number. Disposal
of the picked up material is then
simple and hygienic.
After picking up liquids, the filter
element is wet. A damp filter el-
ement clogs more quickly when
dry substances are picked up.
For this reason the filter element
should be washed and dried or
replaced by a dry element be-
fore dry substances are picked
up.
Always use a filter bag/waste
bag that is suitable for the type
of dust (see table):
Do not pick up flammable
substances.