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en - Original instructions
The electric pump starts, but the thermal protection
trips a varying time after.
Cause
There
are
foreign
objects
(solids
or
fibrous
substances)
inside the pump which
have
jammed
the
impeller.
The
pump
is
overloaded because it
is pumping liquid that is
too dense and viscous.
The pump runs but delivers too little or no liquid.
Cause
The pump is clogged.
The troubleshooting instructions in the tables below
are for installers only.
7.2 The main switch is on, but the
electric pump does not start
Cause
There is no power
supply.
The protective device
against dry running
has tripped.
7.3 The electric pump starts, but the
thermal protector trips or the
fuses blow immediately after
Cause
The power supply cable
is damaged.
The thermal protection
or fuses are not suited
for the motor current.
The electric motor is
short circuit.
The motor overloads.
26
Remedy
Contact Xylem or the
Authorised Distributor.
Check the actual power
requirements based on
the characteristics of
the pumped liquid and
then contact Xylem or
the Authorised
Distributor.
Remedy
Contact Xylem or the
Authorised Distributor.
Remedy
Restore
the
power supply.
Make sure all
electrical
connections to
the
power
supply
are
intact.
Check the:
liquid level in
the tank, or the
mains
pressure.
protective
device and its
connecting
cables.
Remedy
Check the cable and
replace as necessary.
Check the components
and
replace
as
necessary.
Check the components
and
replace
as
necessary.
Check
the
operating
conditions of the pump
7.4 The electric pump starts, but the
thermal protector trips or the
fuses blow a short time after
Cause
The electrical panel is
situated
in
an
excessively
heated
area or is exposed to
direct sunlight.
The
power
supply
voltage is not within
the working limits of
the motor.
A
power
phase
is
missing.
7.5 The electric pump starts, but the
thermal protector trips a varying
time after
Cause
There
are
foreign
objects
(solids
or
fibrous
substances)
inside the pump which
have
jammed
the
impeller.
The
pumps
delivery
rate is higher than the
limits specified on the
data plate.
The
pump
is
overloaded because it
is pumping liquid that is
too dense and viscous.
The motor bearings are
worn.
7.6 The electric pump starts, but the
system's general protection is
activated
Cause
A short circuit in the
electrical system.
7.7 The electric pump starts, but the
system's residual current device
(RCD) is activated
Cause
There is
an ground
and
reset
the
protection.
Remedy
Protect
the
electrical
panel from heat source
and direct sunlight.
Check
the
operating
conditions of the motor.
Check the
power supply
electrical
connection
Remedy
Contact Xylem or the
Authorised Distributor.
Partially close the on-off
valve down stream until
the
delivery
rate
is
equal or less than the
limits specified on the
data plate.
Check the actual power
requirements based on
the characteristics
of
the pumped liquid and
replace
the
motor
accordingly.
Contact Xylem or the
Authorised Distributor.
Remedy
Check
the
electrical
system.
Remedy
Check the insulation of
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