11
04.06.2019
explosion-proof roof fan
WPA-D-N/Ex
A list of frequent functional disturbances and ways of their elimination, is exposed below.
8.
Troubleshooting Guide
Table No.4
Problem
Possible reason
Corrective action
1.
Significant, sudden decrease Pollutants, objects reducing the
Clean the ventilation
of intake air volume.
air flow deposited at the inlet grill. conduits.
2.
Sudden vibrations of the
Obstacle objects got stuck
Disconnect the fan from
fan occur.
within the impeller.
the power system,
and remove the obstacle.
The impeller is faulty.
Replace the impeller and
the motor for new.
3.
It is not possible to switch
Fade of one of the phases
Adjust to gain the correct
on the fan.
or low voltage.
voltage.
The protective block activated.
Adjust the correct settings
of protections.
9.
Maintenance
To obtain correct functional performances and to meet the safety rules,
it is
recommended
submit the fan to technical revision in regular periods of time
. During the revision take
into account the function of the device as well as the technical state of its elements.
Technical revisions on the fan must be executed by a qualified person with
adequate authorization. Additionally, the fan necessarily should by discon-
nected from the power supply system.
Within the scope of technical revision carry out following steps
:
–
as a routine, keep clean the inlet grill
–
periodically, examine and tighten up the mechanical- and electrical connections; moreover
when defective function is by noise or visually spotted
– undertake the revision of the as-
sembly.
–
execute the revision of the fan (motor
– according to the instructions of its manufacturer).
Within the scope of maintenance, clean the fan from deposited impurities.
Before any activities carried out on the fan it is important to
:
Before the start-up, follow subsequent steps
:
– Disconnect the fan from the power supply. Exemption from this are
activities that must be executed at the running fan, i.e. vibration mea-
surements
(
especially here are important safety regulations
).
– Wait until the fan impeller stops rotating
.
The fan can be restarted after the control steps,
(described in Section 6 “Assembly and Start
-
up”), are carried out.
10.
Occupational Health and Safety
Start-up and the operational use of the fan are admissible
after getting acquainted with
the contents of the present Use and Maintenance Manual
.
The
fan shall not cause any ha-
zard under the condition
it
is correctly
and
firmly installed on the roof base or other structural
element of the building.
Any installation activities related to
the
power supply system, have to be carried out strictly ac-
cording to the enclosed
Connection Diagram
and in accordance
with the instructions given in
Section 6 of the present Use and Maintenance Manual.
