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The electric pump starts up but the
thermal protector is immediately triggered
or the fuses blow
The electric pump starts up but, after a
short period of time, the thermal
protector is triggered or the fuses blow.
The electric pump starts up but, after a
varying period of time, the thermal
protector is triggered.
The electric pump starts up but does not
deliver the required flow
The system's general protection cuts in.
The system's differential thermal-magnetic
protection cuts in.
The pump rotates in the wrong direction
when it is stopped.
The pump starts up too frequently
The pump starts up too frequently
9.
Disposal
Observe the regulations and codes locally in force regarding sorted waste disposal.
Pump or auxiliary circuits protection fuses
blown
Triggering of protection device against dry
running
Power supply cable is damaged
Electric motor short circuit
Thermal protector or fuses not suited to
the motor current
Motor overload
Wrong rotation direction
A phase in the power supply is missing
Power supply voltage not within the
motor's working limits
The electric panel is situated in an
excessively heated area or is exposed to
direct sunlight
There are foreign bodies (solid or fibrous
substances) inside the pump, the impellers
are jammed
The pump's delivery rate is higher than
the limit specified on the rating plate
The temperature of the sucked liquid is
too high
Worn motor bearings
Wrong rotation direction (three-phase
version)
Pump is not primed because not filled
with water
Pump not primed due to tightness failure
in check valve
Air in the pipes or pump
Piping and/or pump clogged
Well water level has dropped too much
Pump capacity too high for well
Worn pump
Short circuit
Ground leakage.
Leaks in check valve
Leaks in check valve or system
Ruptured membrane or no air pre-charge
in surge tank
Well water level has dropped too much
Pump capacity too high for well
Information for installation and maintenance personnel
Replace fuses
Check the water level in the tank or well.
If everything is in order, check the
protection device and its connection
cables
Check the components and replace as
necessary
Check the operating conditions of the
electric pump and reset the protection
Check the direction of rotation and, if
necessary, exchange two phases in the
electrical panel if the pump is a three-
phase model, or check all the connections
if it is a single-phase model
Check the power supply
Check the operating conditions of the
electric pump
Protect the panel from heat sources and
from the sun
Extract the electric pump and clean it
Partially close the on-off valve located
downstream until the delivery rate returns
to within the specified limits
Check the operating conditions of the
electric pump.
Contact our Sales and Service Department
Check the direction of rotation and, if
necessary, exchange two phases in the
motor or electrical panel
Repeat the priming procedure
Check the check valve for perfect tightness
Bleed the air
Disassemble and clean
Wait for water level to rise or, if possible,
lower the electric pump further
Replace the pump with a lower capacity
one
Extract the pump and overhaul it
Check the electrical system
Check insulation of the electrical system
components
Repair or replace the components
Check and locate leaks. Repair or replace
the components
See relevant instructions in surge tank's
manual
Wait for water level to rise or, if possible,
lower the electric pump further
Replace the pump with a lower capacity
one
en
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