11
07.02.2017
Explosion proof stationary fan
WPA-P-N/Ex
Risks which can occur due to improper use
:
–
damages or other defects caused by:
burst of the impeller,
break of the shaft,
fatigue crack of the material,
fire and explosion caused by sparks.
In case of any signs of incorrect device function (examples are given in Section 8), or of a
sudden noise increase, drop in the volume flow efficiency
– disconnect the device from the
power supply system, examine thoroughly and follow steps as in the instructions in Section 8.
Additionally, find out the reasons of the malfunction.
In case of every repair or spare part replacement (according to 2014/34/EC
ATEX) it is important to apply an adequate information on an additional plate or in the
enclosed documentation (a register log of repair activities, etc.). This is the duty of User!
A list of frequent functional disturbances and ways of their elimination, is exposed below.
8.
Troubleshooting Guide
Table No.3
Problem
Possible reason
Corrective action
1.
Significant, sudden decrease Pollutants, objects reducing the
Clean the inlet grill.
of intake air volume.
air flow deposited at the inlet grill.
2.
Sudden vibrations of the
Obstacle objects got stuck
Disconnect the fan from
fan occur.
in the impeller.
the power system,
and remove the obstacle.
Damage of the impeller
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 too low voltage.
voltage.
4.
The motor worms up exces-
Damage of the motor windings.
Disconnect the motor,
sively, intense unpleasant
dismantle the fan and
smell is perceptible.
and send it to producer
or their representative.
5.
Noisy work of the fan
Incorrect impeller rotation sense. Change the impeller rota-
along with small volume flow
tions, by swapping the
efficiency.
phase sequence.
