Faults, Causes And Remedies - Wilo Helix VE 2 Série Notice De Montage Et De Mise En Service

10. Faults, causes and remedies

WARNING! Risk of electric shock!
Danger from electrical current must be
eliminated.
Ensure that the pump's power supply is switched
off and secured against unauthorised reactiva-
tion before performing any work on the electric
system.
WARNING! Risk of burns!
In case of high water temperatures and high sys-
tem pressures, close the guard valves upstream
and downstream of the pump. First, allow pump
to cool down.
Faults
The pump is not functioning
The pump is functioning but is failing
to reach its duty point
The output of the pump is irregular
The pump is vibrating or is noisy
The motor is overheating, the motor
protection engages
The mechanical seal is leaking
The delivery rate is inconsistent
In "Constant pressure" or "Variable
pressure" mode, the pump does not
switch off when the delivery rate is
zero
If the fault cannot be resolved, please
contact Wilo customer
Installation and operating instructions – HELIX-VE 2-4-6-10-16
Causes
No electrical power supply
The motor protection device has cut off
the power
Incorrect direction of rotation
Parts of the pump are obstructed by
foreign bodies
Air in the suction pipe socket
Suction pipe socket too narrow
The valve is not open far enough
Presence of air in the pump
In "Constant pressure" mode, the pressure
sensor is not adapted
Foreign matter in the pump
The pump is not firmly secured to the
ground
Bearing damaged
A phase is interrupted
Ambient temperature too high
The mechanical seal is faulty
In "Constant pressure" or "Variable pres-
sure" mode, the pressure sensor is not
adapted
The non-return valve is not impermeable
The non-return valve is not adapted
The tank does not have enough capacity
for the installation
service.
Remedies
Check the fusible cut­outs, the wiring and
the connections
Eliminate any motor overload
Check the direction of rotation and correct
it if necessary
Check and clean the pump
Make the suction pipe socket air­tight
Install a wider suction pipe socket
Open the valve completely
Remove the air from the pump and ensure
that the suction pipe socket is sealed.
Possibly start the pump for 20 – 30
Open the drain cock to let air escape. Close
the drain cock and repeat several times
until no more air comes out of the drain
cock
Install a sensor with a compliant pressure
scale and precision
Remove the foreign matter
Tighten the anchor screws
Contact Wilo customer service
Check the fusible cut­outs, the wiring and
the connections
Provide cooling
Replace the mechanical seal
Install a sensor with a compliant pressure
scale and precision
Clean or change it
Replace it with an adapted non-return
valve
Change it or add another to the installation
English
s.
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