Spare Parts - Wilo Economy Notice De Montage Et De Mise En Service

English
Fault
Pump(s) produces no or too little power
Dry-running protection system switches
off, although water is present
Dry-running protection does not switch
off, although lack of water
Rotation direction warning light on (not
for all pump types)
You will find information on pump or control unit
faults not dealt with here in the attached docu-
mentation for the components concerned.
42
Cause
Inlet pressure fluctuates sharply
Inlet pipe blocked or shut off
Nominal diameter of inlet pipe too small Check the inlet pipe, increase the cross-
Inlet pipe incorrectly installed
Air in inlet
Impellers blocked
Non-return valve leaking
Non-return valve blocked
Gate valve in system closed or not suffi-
ciently open
Low-water level switch has triggered
Direction of motor rotation false
Turn-to-turn fault in motor
Inlet pressure fluctuates sharply
Nominal diameter of inlet pipe too small Check the inlet pipe, increase the cross-
Inlet pipe incorrectly installed
Volume flow too large
Electrodes incorrectly connected or sup-
ply pressure switch incorrectly set
Low-water level switch defective
Electrodes incorrectly connected or sup-
ply pressure switch incorrectly set
Low-water level switch defective
Direction of motor rotation false
Remedies
Check inlet pressure, if necessary take
measures to stabilise supply pressure
(e.g. pressure reducer)
Check inlet pipe, if necessary remove
blockage or open check valve
section for the inlet pipe if necessary
Check inlet pipe, if necessary change
pipe guide
Check, if necessary seal pipe. Vent
pumps
Check pump, if necessary replace or have
repaired
Check, if necessary replace seal or
replace non-return valve
Check, if necessary remove blockage or
replace non-return valve
Check, open the check valve completely
if necessary
Check inlet pressure
Check direction of rotation and correct
by changing over phases if necessary
Check, if necessary replace motor or
have repaired
Check inlet pressure, if necessary take
measures to stabilise supply pressure
(e.g. pressure reducer)
section for the inlet pipe if necessary
Check inlet pipe, if necessary change
pipe guide
Check pump data and default values and
correct if necessary
Check installation or setting and correct
Check, if necessary replace the low-
water level switch
Check installation or setting and correct
Check, if necessary replace the low-
water level switch
Check direction of rotation and correct
by changing over phases if necessary

11 Spare parts

Spare parts or repairs may be ordered from local
professional technicians and/or the Wilo after-
sales service.
To avoid queries and incorrect orders, all data on
the name plate should be submitted with each
order.
WILO SE 05/2019