Xylem LOWARA ESH ATEX Manuel D'installation, D'exploitation Et De Maintenance page 32

en - Original instructions
7.9 The electric pump stops, and
then rotates in the wrong direction
Cause
There is a leakage in
one or both of the
following components:

The suction pipe.

The foot valve or
the check valve.
There is air in the
suction pipe.
7.10 The pump starts up too
frequently
Cause
There is a leakage in
one or both of the
following components:

The suction pipe.

The foot valve or
the check valve.
There is a ruptured
membrane or no air
pre-charge in the
pressure tank.
7.11 The pump generates too much
noise
Cause Remedy
Pump Reduce the required flow
cavitation rate by partially closing the
on-off valve downstream
from the pump. If the
problem persists check the
operating conditions of the
pump (for example height
difference, flow resistance,
liquid temperature).
The motor Contact Xylem or the
bearings are Authorised Distributor.
worn.
There are Contact Xylem or the
foreign Authorised Distributor.
objects
inside the
pump
Impeller rubs Contact Xylem or the
on the wear Authorised Distributor.
ring
Coupling Check the coupling
misaligned alignment.
Flexible Contact Xylem or the
elements of Authorised Distributor.
the coupling
worn
Contact Xylem or the Authorised Distributor
with regard to any situations not covered here.
32
Remedy
Repair or replace
the faulty
component.
Bleed the air.
Remedy
Repair or replace
the faulty
component.
See the relevant
instructions in the
pressure tank
manual.