BA019BB1021A27
23
Fault
Possible cause
Action
Fan is not rotating or stops
after a various time.
No supply voltage present
or missing of a single
phase.
Check the supply voltage
directly on the fan.
If not all phases are
measureable check the-
fuses and the wiring of the
service switch.
Fan turns but there is no
or not enough airflow.
Rotation speed of the fan
too low
Observe star / delta
switching
Air flow interrupted
Check duct system
(e.g. suction, filter, sealing
caps).
Calculated pressure does
not correspond to the real
value.
Check fan selection.
Unfavorable installation
conditions
Check the installation situ-
ation.
Vibrations / noises in fan.
Chafing of impeller
Chafing of impeller. Check
impeller for dirt and clear-
ance. Check mounting of
Impeller and inlet cone
Deformation
Stop fan immediately.
Contact Rosenberg sup-
port
Dirty impeller
Clean impeller
Damaged ball bearings
an impeller.
Damaged ball bearings.
Stop fan immediately.
Contact Rosenberg
support
RCD-Switch or fuse trips.
Ground fault or short
circuit.
Check if the cables are
damaged or
moisture is present.
Defect of the motor
Contact Rosenberg sup-
port
