Xylem LOWARA ESH ATEX Serie Manual De Instalación, Uso Y Mantenimiento página 31

blow immediately after
Cause Solution
The power supply Check the cable and
cable is damaged. replace as necessary.
The thermal Check the
protection or fuses components and
are not suited for replace as necessary.
the motor current.
The electric motor is Check the
short circuit. components and
replace as necessary.
The motor Check the operating
overloads. conditions of the
pump and reset the
protection.
7.4 The pump unit starts, but the
thermal protector trips or the
fuses blow a short time after
Cause Solution
The electrical Protect the electrical
panel is situated in panel from heat
an excessively source and direct
heated area or is sunlight.
exposed to direct
sunlight.
The power Check the operating
supply voltage is conditions of the
not within the motor.
working limits of
the motor.
Check the
A power phase is
missing.
7.5 The pump unit starts, but the
thermal protector trips a varying
time after
Cause Solution Contact Xylem or the
There are foreign
Authorised Distributor.
objects (solids or
fibrous
substances) inside
the pump which
have jammed the
impeller.
The pumps Partially close the on-
delivery rate is off valve down
higher than the stream until the
limits specified on delivery rate is equal
the data plate. or less than the limits
specified on the data
plate.
The pump is Check the actual
overloaded power requirements
because it is based on the
pumping liquid that characteristics of the
is too dense and pumped liquid and
viscous. replace the motor
accordingly.
The motor bearings
Contact Xylem or the
are worn.
Authorised Distributor.
•
power supply
•
electrical
connection
7.6 The pump unit starts, but the
system's general protection is
activated
Cause
A short circuit in the
electrical system.
7.7 The pump unit starts, but the
system's residual current device
(RCD) is activated
Cause Solution
There is an Check the insulation of
ground (earth) the electrical system
leakage. components.
7.8 The pump unit starts, but the
thermal protector trips a varying
time after
Cause Solution
There is air Bleed the air.
inside the pump
or the piping.
The pump is not
Stop the pump and
correctly primed.
repeat the prime
procedure.
If the problem
continues:
•
•
•
The throttling on Open the valve.
the delivery side
is too extensive.
Valves are Disassemble and clean
locked in closed the valves.
or partially closed
position.
The pump is Contact Xylem or the
clogged. Authorised Distributor.
The piping is Check and clean the
clogged. pipes.
The rotation Change the position of
direction of the two of the phases on the
impeller is wrong. terminal board of the
motor or in the electric
control panel.
Check the operating
The suction lift is
conditions of the pump.
too high or the
If necessary, do the
flow resistance in
following:
the suction pipes
•
is too great.
•
7.9 The pump unit stops, and then
en - Original instructions
Solution
Check the
electrical system.
Check that the
mechanical seal is
not leaking.
Check the suction
pipe for perfect
tightness.
Replace any
valves that are
leaking.
Decrease the
suction lift.
Increase the
diameter of the
suction pipe.
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