C 25
19
NO
YES
• Check if the system contains any
dampers and the position of these.
Open dampers to adjust the flow,
but don’t exceed the dimensioned
airflow for the filter unit.
• Check that the filter unit’s inspec
-
tion cover is closed.
• Check the fan for blocked outlet
or other damage.
• Clean the inlet duct.
• Check that the dust container
is tight.
• Check that the duct system not
has any other opening beyond the
inspected ones.
NO
YES
Is the fan operating correctly?
Does
the impeller rotate in the right
direction?
Contact your nearest Nederman
representative for advice.
Has the airflow been satisfactory?
NO
The airflow is insufficient.
Go to
C
YES
Is the pressure resistance high
( >1000-1500 Pa)?
Check the rotating direction of the
fan impeller.
It is very important
that the rotation direction is
right
. If the impeller rotates in the
wrong direction, the fan gives only
40 % of its possible air volume.
Check in the following way:
• Loosen the fixing screws on the
access door.
• Start the FilterMax C 25.
• Stop the FilterMax C 25.
• Open the access door and check
through the fan inlet the impeller
rotation direction.
Contact a qualified electrician if the
impeller rotation must be reversed.
D
YES
NO
The FilterMax C 25 pressure
resistance is high.
C
Are there some valves that are
functioning?
Go to
E
Go to
B
NO
YES
Is the cleaning system fully
functioning?
If a dP-control is installed, see
instructions for this product re-
garding the adjustment of cleaning
the system.
Otherwise, check the pause time set
on the timer (see page 12).
The default value is 60 s. A heavy
application will require shorter times.
A very light application can use
longer times.
Check the pressure of the com-
pressed air. It should be 0.5 - 0.6
MPa (5 - 6 bar, 72 - 87 psi).
If the cleaning has been adjusted
previously you may have to replace
the filter cartridges.
