rosenberg CI serie DV...G serie Betriebsanleitung Seite 35

Fault
Fan rotates at maximum
speed, independent of
the setpoint.
Fan does not run at max-
imum speed.
Fan turns but there is no
or not enough airflow.
Vibrations / noises in fan.
RCD-Switch or fuse trips.
BA044BB0418A18
Possible cause
Fan is in closed loop.
Max. setpoint is not pre-
sent on analog 1.
Setpoint on analog 1 is
too high.
Temperature dependent
power derating is acti-
vated.
Rotation speed of the fan
too low.
Air flow interrupted.
Calculated pressure
does not correspond to
the real value.
Unfavorable installation
conditions.
Chafing of impeller.
Deformation.
Dirty impeller.
Damaged ball bearings.
Wrong Operating point
(only axial-fans).
Ground fault or short
circuit.
Defect of the motor
and/or the electronic.
Action
Change parameter with "EC-Param" or
contact the Rosenberg support.
Check setpoint according to pin connec-
tion and increase.
Limit setpoint according to pin connec-
tion.
Control the airflow temperature and am-
bient temperature for its limits (Name-
plate data).
Please see "fan does not run at maxi-
mum speed".
Check duct system (e.g. suction, filter,
sealing caps).
Check fan selection.
Check the installation situation.
(chapter 6.1)
Check impeller for dirt and clearance.
Check mounting of Impeller and inlet
cone.
Stop fan immediately. Contact Rosen-
berg support.
Clean impeller.
Stop fan immediately. Contact Rosen-
berg support.
Operating point is in the forbidden area
of the air curve. Reduce pressure losses.
Check if the cables are damaged or
moisture is present.
Contact Rosenberg support.
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