6
MAINTENANCE
POWER OFF THE POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
Maintenance comprises periodical cleaning of the surfaces from dust and
dirt, when the fan is disconnected from power mains.
To remove the dust, use a soft dry brush or compressed air.
The blades of the impeller require careful cleaning every 6 months.
Loosen the self-cutting screws 3, detach the cover 2 and the grille 6 from the
casing 1. Wipe the impeller blades with a cloth wetted in a mild detergent
solution. Avoid water dripping on the electric motor!
Possible malfunctions and their elimination
Problem
Possible reasons
Elimination
The fan will not start.
No power supply.
Jammed motor.
Check the mains switch. Check the
electrical connections against the
wiring diagram.
Carefully check the fan impeller for
possible seizure and eliminate it, if
necessary. If the impeller is in order,
replace the electric motor.
The fan fails to reach
the required rotation
speed due to serious
overheating of the fan
motor.
Fan motor
overloaded.
Improper fan starting
method.
Eliminate the overload.
Use a soft starter or frequency
converter to start the motor
(see "Asynchronous Electric Motor
Starting Methods" in the "Connection
to power mains" section).
Summary of Contents for Tower A 200 2E
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