ENGLISH
Maintenance and cleaning
always wear appropriate protective clothing (including hard hats, eye protectors and ear defenders) when work ̇ n g
N.B
in the vicinity of the fan assembly.
Periodically check the screw connections, the coil resistance, the functionality of the safety components and the controls.
Clean the fan only manually, with a vacuum cleaner or compressed air. Before starting service, maintenance or repair
operations, disconnect the electrical connections and stop the impeller. The fan must be cleaned if necessary at least once
a year to preserve its capacity. Fan bearings are maintenance-free and should only be replaced if necessary. Cleaning must
be done without removing or damaging the impeller. Make sure the ventilator does not emit any suspicious noise.
In addition to routine maintenance, engine bearings require special attention in the long run. If automatic lubricants are
applied to the motor bearings, it is necessary to periodically use a type of quality according to the information on the fan
or motor nameplate and / or the instructions supplied.
Fault detection
It is necessary to turn off the fan before checking the fan and the system. During maintenance, device electrical connections
should be cut entirely. All switches and circuit breakers should be locked by brought to the OFF position. Also "DO NOT
START" sign should be placed on the control panel that will consistently stand.
Check that the electrical connections to the unit are secure. Check that the voltage applied at the fan terminals is as speci-
fied on the motor nameplate, and is balanced. Measure the current on each phase (one phase in the case of single-phase
motors) of the motor in turn and check that the current consumption is within the full load current specified on the motor na-
meplate.
Rotate the motor shaft by hand. Investigate any sound of grinding noises, internal chaffing, rubbing or stiffness. Any obser-
ved defect may indicate that the bearings require lubrication or replacement. Ensure that all fixings are secure. Make sure
that the fan blade is not blocked by an object, if fan is still not working, contact your supplier.
14