11
27.09.2016
Portable radial fans
WPA-P-N
8. Trouble Shooting Guide
Problem
Possible reason
Corrective action
1.
Sudden and significant
Pollutants, foreign objects (being Remove the pollutants;
drop in intake volume flow.
obstacle do the air flow) have
clean the ventilation conduits.
deposited at the inlet grill.
2.
Sudden vibrations of the fan Obstacle objects reducing
Disconnect the fan from
are occurring.
the air flow got stack at the
the power supply system,
impeller.
and remove the obstacle.
The impeller is defective.
Replace the impeller with
motor for a new one.
3.
Noisy work of the fan
Incorrect impeller rotation sense. Change the impeller rotation
along with small volume flow.
sense by changing the phase
connection sequence
(three-phase fans only).
9. Maintenance
In the aspect of operational use, the fan construction guarantees its efficient function
without continuous everyday technical supervision. Nevertheless, to obtain proper function
of the device and to follow the safety rules,
manufacturer suggests executing technical
revisions on regular basis
.
During the inspection check the function of the fan and the technical state of its elements.
Any maintenance activities should be executed exclusively
by an authorised person and after disconnection from the power system
.
(
the exemption from this are activities carried out on the running fan, under strict
observing the Occupational and Health Safety rules
– e.g. vibration measure-ment
).
Before the maintenance on the fan, necessarily disconnect it from the power supply system
and wait until the impeller stops rotating.
Within the scope of inspection execute following activities
:
●
check and tighten the mechanical and electrical connections,
●
examine the mountings of the motor and the fan, important is that the clearance between
the inlet and the impeller is even within the whole circumference.
●
remove the impurities accumulated inside the fan, eventually clean it from pollutants
originating from the conveyed medium.
During the maintenance activities follow strictly the rules of Occupational Health and Safety,
in order not to cause hazard to workers.