9.0 INFORMATION REGARDING FAULTS
WAMFLO
®
FN200X
2
FIL.WAMFLO_FN200.EX.M.A7.0522.EN Issue: A7
05.22
63
FAULT
PROBABLE CAUSE
POSSIBLE REMEDY
Power absorption higher than rating
plate data. (2)
Rotation speed so high as to require a
power greater than that installed.
Replacement of motor and pulleys
and/or redefine the system.
Air density greater than the one envis-
aged.
See above.
Higher throughputs at design levels
for pressure lower than design value.
See above.
Air blows.
Extracting device which functions
in the initial area of the throughput
curve.
Redefine the installation or replace
the fan.
Centrifugal fans which operate in null
throughput conditions.
See above.
Suction not constant, with vortices.
Insert flow rectifiers.
Excessive noise.
Higher rpm to obtain the required
performances.
Use of soundproofed enclosures
and/or silencers; choose a machine
with larger dimensions and the same
performance or a machine with lower
peripheral speed.
Faulty bearings.
Check the bearings for wear (espe-
cially those sealed tight) and lubrica-
tion.
Impeller not balanced or sliding on
housing.
Check the fixing of the impeller and
tubes.
Eccentricity between rotor and stator. Check coaxiality.
Vibrations in winding.
Can be reduced by using better qual-
ity motors.
Vibrations.
Imbalance of the rotating parts.
Check balance again.
Supporting structure unsuitable
(natural frequency approaching that
corresponding to fan rotation speed).
Modify the natural frequency of the
support by adding weights.
