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2.
Suction port, suction strainer and/or impeller
clogged
• Clean the suction port, suction strainer and/or
impeller
3.
Impeller stiff
• Switch off the unit, secure it against being
switched back on again and free the impeller
4.
Inadmissible levels of gas in the fluid
• Consult the factory
5.
Incorrect direction of rotation
• Change the direction of rotation
6.
Signs of wear
• Replace worn parts
7.
Defective motor bearing
• Consult the factory
8.
Unit is installed under tension
• Check installation, use expansion joints if
necessary
9.1.6 Further steps for troubleshooting
If the points listed here do not rectify the fault,
contact customer service. They can help you as
follows:
• Telephone or written support from customer
service
• On-site support from customer service
• Inspection or repair of the unit at the factory
Please note that you may be charged for some
services provided by our customer service! For
more details, please contact customer service
10 Appendix
10.1 Spare parts
Spare parts can be ordered from the manufactur-
er's customer service. To avoid return queries and
incorrect orders, the serial and/or article number
should always be supplied.
Subject to change without prior notice!
14
APPENDIX
WILO SE 12-2017 DIN A4