7
Problem
Possible reasons
Elimination
The fan motor runs at
overload capacity with
current consumption in
excess of the rated
value.
The fan supplies
more air than
expected upon motor
capacity selection.
Wrong motor
phasing. The
impeller rotates in
the opposite
direction of the arrow
on the fan casing.
Air ducts clogged.
Measure network resistance. Throttle
down the network (add aerodynamic
resistance to the air duct network).
If necessary, change the impeller
rotation direction by changing the
phase sequence on the electric motor
terminals.
Clean the air duct or the impeller.
The fan supplies less
air than expected.
Wrong calculation of
the ventilation
network and wrong
selection of the fan.
The network
resistance exceeds
the design
calculations.
Wrong direction of
the impeller rotation
direction.
Air leak through a
loose air duct
connection.
Impeller or air duct
contamination with
foreign objects or
debris.
Re-calculate the network parameters
and select a matching fan.
Re-arrange the ventilation network to
decrease its aerodynamic resistance.
If necessary, change the impeller
rotation direction by changing the
phase sequence on the electric motor
terminals (see the "Commissioning"
section).
Eliminate the air leak. Seal the air duct
connection.
Clean the impeller or the air ducts
from foreign objects or debris.
Summary of Contents for Tower A 200 2E
Page 1: ...Tower A L User s manual ...
Page 10: ...10 ...
