16
RADIAL ROOF FANS
SMART-N 31.05.2019
In case when any defective device function is noticed (increased noise level, vibrations, redu-
ced flow efficiency), disconnect the fan from the power supply, and to undertake its technical
revision in order to spot the reason of the functional disturbance.
Most typical disturbances and their reasons are exposed in the Section 8.
8.
Trouble Shooting Guide
Table No.15
Problem
Possible reason
Corrective action
1.
The fan cannot be
Fade out of one of the phases
Supply correct voltage,
switched on
is observed or
check the protection.
voltage is too low or the impeller Remove the object
is blocked.
blocking he impeller.
2.
Sudden vibrations of the
Obstacle objects reducing the
Disconnect the fan from the
fan are occurring
air flow got stack in the fan
power supply system,
take off the hood and
remove the obstacle
The impeller is faulty
Replace the impeller for new
3.
The fan is working too noisy Improper impeller rotation sense Change the impeller rotation
or its flow efficiency is too
sense by swapping phase
weak
connection sequence
9.
Maintenance
Construction provides operational longevity, robustness, reliable function, under the condition
of appropriate operational use and correctly executed maintenance.
To obtain correct
functional performances and to meet
the safety rules, it is recommended to sub-
mit the fan to technical revisions in regular periods of time (i.e. once a year). During the check
take into account the function of the fan as well as its technical state.
All the activities connected with
technical revisions on the fan have to be
carried out
by an authorised person with adequate
qualifications
and
necessarily after dis-
connection from the power supply system
.
To disconnect the fan from the power supply system, use an isolating switch (IS), which
should
be ordered and installed by User. Isolating switch ought
to be
installed
within reach
of the servicer.
IS isolating switches are offered by KLIMAWENT S.A. as additional accessory. The way of con-
nection is shown in the operation manual of the insolating switch (IS).
There are subsequent activities within the range of technical revision
:
● examine and tighten up the mechanical- and electrical connections,
● check the mounting of the motor and fan, mind the clearance between the bent profiles and
the impeller is equalised in the whole circumference,
● remove the impurities (eventually) deposited inside the fan.
Prior to the re-start of the fan
carry out the revision steps listed
in the Section 6 “Assembly
and Start-
up” of the present Use and Maintenance Manual.
Exemption from this are tests that
need
to be carried out on the
device being in run, along
with the strictly followed safety regulation
– as an example – measuring of vibrations.
In the course of the revision activities
it is important to follow the safety regulations
– otherwise
the personnel / User can be at
risk
. Construction of the fan
guarantees its operational use when
it
is submit to proper maintenance.