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CAUSES OF IRREGULAR FUNCTION - TROUBLESHOOTERS
2. The overload relay or
internal thermal-
amperometric
protection (single-
phase version only) has
activated during
operation
3. The aerator fails to
stop automatically
4. The aerator delivers a
very poor flow rate.
5. The aerator is noisy
and vibrates.
2.10 Damaged motor windings
owing to the presence of liquid.
3.1 The automatic monitoring
devices (level switch, etc.) fail to
enable the aerator to stop.
4.1 The motor turns in the wrong
direction.
4.2 Worn aerator.
4.3 Delivery duct or valve partially
clogged.
5.1 Plant installed incorrectly.
5.2 Hydraulics excessively worn.
5.3 Liquid contains an excessive
amount of solids.
2.10 Check according to the
procedure described in the
“Maintenance” chapter.
If necessary, send the aerator to
an authorized after –sales service
centre.
3.1 See 1.3
4.1 Invert two of the three phases.
4.2 Inspect the aerator according to
the procedure described in the
“Maintenance” paragraph.
4.3 Aerator clear water through the
duct to flush or demount it if
necessary.
5.1 See 4.1
5.2 See 4.2
5.3 Check whether the right aerator
has been chosen.
Faults Possible causes Remedies
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