Spare Parts; Further Steps For Troubleshooting - Wilo SUB TWU 3 Notice De Montage Et De Mise En Service

SPARE PARTS

9.2.6. Fault: Automatic control of the system does
not function
1. The tapping points are closed, the unit keeps
running or immediately starts up again
• The difference between Pmax and Pmin is too
small; adapt the value "Delta P" in the operat-
ing parameters
2. The unit continuously switches on and off
• Leak in the system; check the pipes and repair
the leak
3. The unit will not switch off
• Leak in the system; check the pipes and repair
the leak
• The check valve on the discharge port does not
close correctly; switch off the unit, secure it
against being switched on again and clean the
check valve

9.2.7. Further steps for troubleshooting

If the points listed here do not rectify the fault,
contact our 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 support. For
more details, please contact customer service.
10. Spare parts
Spare parts can be ordered from the manufac-
turer's customer service. To avoid queries and
incorrect orders, the serial and/or article number
must always be suppled.
Technical changes reserved
Installation and operating instructions Wilo-Sub TWU 3/High Speed
English
49