Wilo 2.0-VE 22-36-52, Installation And Operating Instructions Manual

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en Faults, causes and remedies
22 WILO SE 02/2022
10 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.
Faults Cause Remedies
Pump does not run No current Check the fuses, the wiring, and the connectors
The thermistor tripping
device has tripped out, cut-
ting off power Eliminate any cause of overloading of the motor
Pump runs but delivers too
little Wrong direction of rotation Check the direction of rotation of the motor and correct it
if necessary
Parts of the pump are ob-
structed by foreign bodies Check and clean the pipe
Air in suction pipe Make the suction pipe airtight
Suction pipe too narrow Install a larger suction pipe
The valve is not open far
enough Open the valve properly
Pump delivers unevenly Air in pump 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
Pump vibrates or is noisy Foreign bodies in pump Remove the foreign bodies
Pump not properly attached
to ground Retighten the screws
Bearing damaged Call the Wilo Customer Service
Motor overheats, its protec-
tion trips out A phase is open-circuit Check the fuses, the wiring, and the connectors
Ambient temperature too
high Provide cooling
Mechanical seal is leaking Mechanical seal is damaged Replace the mechanical seal
If the fault cannot be solved, please contact the Wilo customer services.
11 Spare parts
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
12 Disposal
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.