Xylem e-SV - Manual (Page 19)

Cause Remedy
The protective device against dry
running has tripped.
Check the water level in the tank, or
the mains pressure.
The electric pump starts, but the thermal protection trips a varying time af-
ter.
Cause Remedy
There are foreign objects (solids or fi-
brous substances) inside the pump
which have jammed the impeller.
Contact the Sales and Service De-
partment.
The pump is overloaded because it is
pumping liquid that is too dense and
viscous.
Check the actual power require-
ments based on the characteristics
of the pumped liquid and then con-
tact the Sales and Service Depart-
ment.
The pump runs but delivers too little or no water.
Cause Remedy
The pump is clogged. Contact the Sales and Service Department.
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 Remedy
There is no power supply. • Restore the power supply.
• Make sure all electrical connections
to the power supply are intact.
The thermal protector incorpora-
ted in the pump (if any) has trip-
ped.
Wait until the pump has cooled down.
The thermal protector will automatically
reset.
The thermal relay or motor pro-
tector in the electric control panel
has tripped.
Reset the thermal protection.
The protective device against dry
running has tripped.
Check the:
• water level in the tank, or the mains
pressure
• protective device and its connecting
cables
The fuses for the pump or auxili-
ary circuits are blown.
Replace the fuses.
7.3 The electric pump starts, but the
thermal protector trips or the fuses blow
immediately after
Cause Remedy
The power supply cable is dam-
aged.
Check the cable and replace as necessa-
ry.
The thermal protection or fuses
are not suited for the motor cur-
rent.
Check the components and replace as
necessary.
The electric motor is short cir-
cuit.
Check the components and replace as
necessary.
The motor overloads. Check the operating conditions of the
pump and reset the protection.
7.4 The electric pump starts, but the
thermal protector trips or the fuses blow a
short time after
Cause Remedy
The electrical panel is situated in an ex-
cessively heated area or is exposed to di-
rect sunlight.
Protect the electrical panel from
heat source and direct sunlight.
The power supply voltage is not within
the working limits of the motor.
Check the operating conditions of
the motor.
A power phase is missing. Check the
• power supply
• electrical connection
7.5 The electric pump starts, but the
thermal protector trips a varying time after
Cause Remedy
There are foreign objects (solids or
fibrous substances) inside the
pump which have jammed the im-
peller.
Contact the Sales and Service Depart-
ment.
The pumps delivery rate is higher
than the limits specified on the da-
ta plate.
Partially close the on-off valve down
stream until the delivery rate is equal or
less than the limits specified on the da-
ta plate.
The pump is overloaded because it
is pumping liquid that is too dense
and viscous.
Check the actual power requirements
based on the characteristics of the
pumped liquid and replace the motor
accordingly.
The motor bearings are worn. Contact the Sales and Service Depart-
ment.
7.6 The electric pump starts, but the
system's general protection is activated
Cause Remedy
A short circuit in the electrical system. Check the electrical system.
7.7 The electric pump starts, but the
system's residual current device (RCD) is
activated
Cause Remedy
There is an earth (ground)
leakage.
Check the insulation of the electrical system
components.
7.8 The pump runs but delivers too little or
no water
Cause Remedy
There is air inside the pump
or the piping.
• Bleed the air
The pump is not correctly
primed.
Stop the pump and repeat the prime proce-
dure. If the problem continues:
• Check that the mechanical seal is not
leaking.
• Check the suction pipe for perfect tight-
ness.
• Replace any valves that are leaking.
The throttling on the delivery
side is too extensive.
Open the valve.
Valves are locked in closed or
partially closed position.
Disassemble and clean the valves.
The pump is clogged. Contact the Sales and Service Department.
The piping is clogged. Check and clean the pipes.
The rotation direction of the
impeller is wrong (three-phase
version).
Change the position of two of the phases
on the terminal board of the motor or in
the electric control panel.
The suction lift is too high or
the flow resistance in the suc-
tion pipes is too great.
Check the operating conditions of the
pump. If necessary, do the following:
• Decrease the suction lift
• Increase the diameter of the suction pipe
7.9 The electric pump stops, and then
rotates in the wrong direction
Cause Remedy
There is a leakage in one or both of the following
components:
• The suction pipe
• The foot valve or the check valve
Repair or replace the
faulty component.
There is air in the suction pipe. Bleed the air.
en - Translation of the original instructions
e-SV - English 15