Faults, Causes And Remedies; Spare Parts; Disposal - Wilo -Helix V FIRST V 2.0-VE 2 Installation And Operating Instructions Manual

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Faults, causes and remedies

Faults
Pump does not run
Pump runs but delivers too
little
Pump delivers unevenly
Pump vibrates or is noisy
Motor overheats, its protec-
tion trips out
Mechanical seal is leaking
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Spare parts

12

Disposal

20
Faults, causes and remedies
DANGER
Electrical shock hazard!
Dangers caused by electrical energy must be excluded.
All electrical work must be performed after the electrical supply has been switched
off and secured against unauthorized switching.
WARNING
Risk of scalding!
At high water temperatures and system pressure close isolating valves before and
after the pump. First, allow pump to cool down.
Cause
No current
The thermistor tripping
device has tripped out, cut-
ting off power
Wrong direction of rotation
Parts of the pump are ob-
structed by foreign bodies
Air in suction pipe
Suction pipe too narrow
The valve is not open far
enough
Air in pump
Foreign bodies in pump
Pump not properly attached
to ground
Bearing damaged
A phase is open-circuit
Ambient temperature too
high
Mechanical seal is damaged
If the fault cannot be solved, please contact the Wilo customer services.
All spare parts should be ordered directly from the Wilo customer service. To prevent
errors, always quote the data on the pump's rating plate when making an order. The
spare parts catalogue is available at www.wilo.com
Information on the collection of used electrical and electronic products.
Proper disposal and appropriate recycling of this product prevents damage to the envi-
ronment and dangers to your personal health.
Remedies
Check the fuses, the wiring, and the connectors
Eliminate any cause of overloading of the motor
Check the direction of rotation of the motor and correct it
if necessary
Check and clean the pipe
Make the suction pipe airtight
Install a larger suction pipe
Open the valve properly
Evacuate the air in the pump; check that the suction pipe is
airtight. If required, start the pump 20-30s – open the air
bleed screw in order to move air away – close the air bleed
screw and repeat it several times until no more air is going
out of the pump
Remove the foreign bodies
Retighten the screws
Call the Wilo Customer Service
Check the fuses, the wiring, and the connectors
Provide cooling
Replace the mechanical seal
WILO SE 02/2022