Wilo Economy - Spare Parts

English
34 WILO SE 10/2010
You will find information on pump or control unit
faults not dealt with here in the attached docu-
mentation for the components concerned.
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.
Subject to change without prior notice!
Pump(s) produces no or too little power
Inlet pressure fluctuates sharply Check inlet pressure, if necessary take
measures to stabilise supply pressure
(e.g. pressure reducer)
Inlet pipe blocked or shut off Check inlet pipe, if necessary remove
blockage or open check valve
Nominal diameter of inlet pipe too small Check the inlet pipe, increase the cross-
section for the inlet pipe if necessary
Inlet pipe incorrectly installed Check inlet pipe, if necessary change
pipe guide
Air in inlet Check, if necessary seal pipe. Vent
pumps
Impellers blocked Check pump, if necessary replace or have
repaired
Non-return valve leaking Check, if necessary replace seal or
replace non-return valve
Non-return valve blocked Check, if necessary remove blockage or
replace non-return valve
Gate valve in system closed or not suffi-
ciently open
Check, open the check valve completely
if necessary
Low-water level switch has triggered Check inlet pressure
Direction of motor rotation false Check direction of rotation and correct
by changing over phases if necessary
Turn-to-turn fault in motor Check, if necessary replace motor or
have repaired
Dry-running protection system switches
off, although water is present
Inlet pressure fluctuates sharply Check inlet pressure, if necessary take
measures to stabilise supply pressure
(e.g. pressure reducer)
Nominal diameter of inlet pipe too small Check the inlet pipe, increase the cross-
section for the inlet pipe if necessary
Inlet pipe incorrectly installed Check inlet pipe, if necessary change
pipe guide
Volume flow too large Check pump data and default values and
correct if necessary
Electrodes incorrectly connected or sup-
ply pressure switch incorrectly set
Check installation or setting and correct
Low-water level switch defective Check, if necessary replace the low-
water level switch
Dry-running protection does not switch
off, although lack of water
Electrodes incorrectly connected or sup-
ply pressure switch incorrectly set
Check installation or setting and correct
Low-water level switch defective Check, if necessary replace the low-
water level switch
Rotation direction warning light on (not
for all pump types)
Direction of motor rotation false Check direction of rotation and correct
by changing over phases if necessary
Fault Cause Remedies